1 The salts have been leaching away during a drenching rain.

2 Much of the mineral content has been leaching out of the soil during the rainy weather.

3 Not to mention all the horrid underarm deodorants leaching into the microclimate.

4 Sewage, farmyard waste and fertilizer leaching into the river could also be to blame.

5 The dumps were generating explosive gases and leaching noxious chemicals that polluted underground water sources.

6 Heap leaching uses chemical solutions to dissolve gold from heaps of crushed ore.

7 They calculate severe leaching of such toxic metals as beryllium, aluminum, mercury, lead, and cadmium.

8 Everything from erosion to leaching to iron rainstorms is possible, perhaps much more.

9 In arid and semi-arid regions leaching may be minimal and solutions in the weathering mantle can attain high concentrations of dissolved constituents.

10 Maybe that was why it died, rubbish leaching into that creek.

11 The acid leaching kinetics of serpentine was researched.

12 An activator ATB has been selected for leaching.

13 The leaching behavior of air cooled Ti bearing blast - furnace slag in hydrochloric acid was investigated.

14 The roasting and leaching behavior of spodumene in sulphuric acid process was investigated.

15 Further, leaching liquid after being washing does not need other treating process and any outside material, can realizes closed circuit operation, and generate no effect to outsides.

16 The kinetics of two - ores leaching process of galena concentrate and manganese dioxide was investigated.

17 This paper studies the leaching function of high grade bauxite containing sulfur of Guizhou according to the high-pressure digestion theory of the diaspore bauxite .

18 Acid - leaching reactor is the key instrument for preparing poly aluminium chloride ( PAC ) from kaoline.

19 The manufacturers say that there is no danger of the aluminium leaching into the water.

20 Although the increase in rainfall would aid irrigation, it would add to the problems of soil erosion and nutrient leaching.

21 These features are probably reflections of the degree of leaching, which depends to a large extent on the rainfall.

22 Once again the carbonates came into contact with meteoric water and this was responsible for yet another episode of leaching.

23 These needed several coats of polyurethane varnish to prevent the dye leaching out.

24 As long as the rubble remains and rains fall, the leaching process will continue.

25 A monitoring programme is designed to assess the rate of leaching in inorganic ions and hydrocarbons from the deposit.

26 Switch to a spring dressing when rain fall drops and leaching will be less, he urges.

27 The units which are used for extracting uranium from the lixivium of in situ leaching(or heap leaching) are all the packed bed with ion exchange of high efficiency.

28 The heap construction by stage deephole millisecond blasting and stope leaching technique are mainly described and the technical economy and benefit analyses are carried out.

29 The invention provides a low-cost and high-efficient agentia for leaching petroleum-polluted soil as well as a preparation method and an application thereof.

30 The invention relates to mesophilic acidophilic bacteria and a biological heap leaching technology for low-grade cobaltiferous sulfide ore concentrates.

31 We have got some recognition about rule on control of equilibrium results and pulverulent ratio in leaching process by Multcomponent Multphase Equilibrium simulation research and leaching experiment.

32 The invention relates to a leaching method for alloy obtained by magnetic separation nickel-copper bessemer matte.

33 The method of ammonium magnesium arsenate has been used to remove the arsenic from leaching liquor of arsenic-containing molybdenum ore.

34 The leaching residue of low-grade lithopone is treated with pollution-free normal temperature alkaline smelting.

35 Loading and concentration of uranium from alkali leaching solution of uranium ore with titanium sulfate gel are studied.

36 Leaching process of zinc roasting - sand in production of electrolytic zinc has been improved.

37 Still, the easiest way to protect users from leaching chemicals (or just general dirt and germs) is to put a condom over the dildo or vibrator, experts say.

37 try its best to collect and create good sentences.

38 Leaching mining is probably an effective way for the exploitation of deeply buried polyhalite.

39 The process of leaching depends on the seeping and diffusing velocity of leaching agent and resultant.

40 Results show that it is rather difficult to extract boron from ludwigite if roasting direct the ludwigite and then leaching.

41 The research on the water leaching rate of bag tea of the root of kudzu vine and thin-layer chromatography is discussed.

42 The process of chlorine leaching - purification - electrowinning for nickel extractioncopper residue is investigated.

43 A process mineralogical study was thus made and it was founded that it is mainly realgar and orpiment that affect the gold leaching.

44 The free cyanogen determinator is used to make density analysis of free sodium cyanide in the cyanide leaching solution of gold ore.

45 The strain performs well in the bioleaching of phosphate ore, and the leaching rate reaches 23.13 %.

46 It showed that in the given conditions, the gold leaching rate of oxidized type gold ore by biologicals was more than 95% while the gold leaching rate of r...

47 Leaching of gold is a nwe method for non - cyanidation leaching gold.

48 Leaching The removal of humus and soil nutrients in solution by water moving down the soil profile.

49 The effects of nine oxidants on gold cyaniding leaching were studied.

50 Results have shown that the lixivium concentration affected by leaching times, pH, leaching temperatures, and grain diameter values of the media and most parts of the hazardous element are stable.

51 The leaching efficiency of copper smelter slag with high silicon is investigated in this study.

52 The present study shows the sodium sulfate has promoting effects on the sulfating roasting of sulfide ore and on the metal leaching of roasted ore.

53 In this paper, extract perfume and perfume coloring matter mixture from drying navel orange rind with distillation and leaching respectively.

54 They are characterized by extensive distribution, big thickness, higher contents and better leaching rate.

55 Because of using zinc hydrometallurgy process of jarosite process, the leaching rate of zinc may reach 97% and this line can produce high quality zinc continuously and steadily.

56 First, it has been studied for the process conditions and dynamics performance of leaching calcium molybdate with sodium solution.

57 According to the geological conditions of polyhalite deposit formation, the deposit has good sealed wall rocks and basic geological conditions of leaching mining.

58 Adding triethanolamine oleate to the solution can obviously inhibit the leaching of cobalt from cemented carbide.

59 Alkaline leaching of Zn from hazardous waste bearing Zn is studied.

60 A model was developed for the kinetics of the liquid-solid phase reactions in a intermittent reactor, such as the leaching process of stibnite in the antimony hydrometallurgy.

61 Polysulfide leaching has such advantages as elimination of the influence of CaS, speedy gold leaching and nontoalcity of reagents.

62 A study for leaching of a low grade and difficult to separate copper ore was performed by using ammoniacal pressure leaching method.

63 The arsenolite cinders were treated by the processes of oxidizing roasting-pyrolusite pulp absorption, magnetizing roasting-magnetic separation and acid leaching.

64 Using biology leaching for normal college students can train their modernized consciousness.

65 The rates of leaching deliquescence and agglomeration of the tested fertilizers are also examined.

66 The column leaching experiments of the primary ore of copper sulfide with thermoacidophile, KY-2 strain, are conducted.

67 Indium was recycled from a certain converter slag containing 0.4% indium through a method of thermal activation leaching in sulfuric acid solution.

68 The new technology has advantages of non-acid leaching process, high purity of product, simple production process, high ratio of raw material utilization and low three wastes,(http:///leaching.html) etc.

69 The catalysis - acid leaching process of copper bismuth sulphide dregs is introduced.

70 For this, hydrogen peroxide and cupferron were used as screening agent and agent for removing impurities in the test of purifying this vanadium-containing acid leaching solution.

71 Generally, oxygen or hydrogen peroxide, as leaching oxidant, and sodium chloride solution , as elutriant of saturated resin, have been applied to in-situ leach of uranium so far.

72 The leaching solution was purified by ion exchange, and then ammonium metavanadate was precipitated. A qualified product V 2O 5 was obtained by calcining ammonium metavanadate .

73 Experiments on preparation of cupric sulfate from a copper sulfide ore by microbiological leaching solvent extraction crystallization have been carried.

74 The high-purity manganese carbonate is prepared by leaching manganese with sulfur dioxide, removing impurities, carbonating and crystallizing from Xiangtan's low-grade manganese ore.

75 The simulated leaching tests showed no significant effects of different chelates on the content of mercury in leachate and the residual soil.

76 The sewage soil disposal experiment is made mainly by using biochemical process of looser permeable soil horizon, and secondly by leaching and adsorption.

77 The effect of acid leaching conditions on leaching rate of copper and zinc in process for production of copper and zinc sulfates from copper smelting dust was studied in this paper.

78 In this PaPer, the gold leaching from complex sulfide-bearing gold concentrate by cyanide process was studied systematically.

79 In this article, the process and numerical model of copper oxide ore leaching are introduced.

80 The in - situ underground leaching of low - grade copper ore is a new technology of extraction ore resources.

81 The development ofthe high - temperature high - pressure leaching technology of zinc sulphide concentrate were introduced.

82 The effects of microwave roasting pretreatment on leaching behavior of diaspore ore were investigated.

83 To construct a more effective mixing leaching, it is of great significance to understand the change of community system between the process of ore mineral extraction.

84 The bio - leaching system involves polyphase interfacial interactions, such as microorganism - mineral, mineral - mineral, microorganism - solution, ...

85 The experimental process for recovery molybdenum and ammonium chloride from mother liquors of ammonium molybdate and ammonia leaching molybdic acid using HT adsorbents is presented.

86 Insitu leaching mining of deeply buried polyhalite can alleviate severe shortages of potash resources in China.

87 The technological key to leaching mining of underground polyhalite is the extraction of effective constitutes from polyhalite.

88 The mechanical strength of calcined briquet can meet the needs of percolation leaching operation.

89 The reductive extraction method of bastnasite baked by sodium carbonate and low acidity HCI leaching for making rare earth chloride is reported.

90 Leaching of copper from chalcocite with acidic acetonitrilecopper sulphate system was studied.

91 Unless leaching occurs, nitrogen should not be applied after lay-by .

92 The method, experimental equipment and results of column leaching were presented for low - grade copper sulfide ore.

93 The leaching of seepage water takes place in the evolution stages of the saprolite.

94 The research includes technological mineralogy, leaching principles, methods, measures and effects.

95 Remove of iron from sulfuric acid leaching solution of ferrochromium alloy by goethite is researched.

96 Beueficiation tests of a siderous andalusite were performed, and a combined flowsheet which include desliming-flotation-magnetic separation-acid leaching was developed.

97 The general slag produced in treating the anode sludge of copper electrolysis in a copper smelter has a high tellurium content and test is made on recovering the tellurium from the slag by leaching.

98 It is beneficial to leaching result to recycle the raffinate in the column leaching process,(/leaching.html) and there is no significant negative effect of residual extractant on thermoacidophile.

99 Conclusion Clinical case teaching is superior to conventional methods in Paediatrics leaching.

100 High-level cottonseed oil, gossypol-free cottonseed meal and methanol phase abundant in free gossypol (FG) could be obtained by the leaching process with a two-liquid phase solvent (TPS) system.

101 It showed that in the given conditions, the gold leaching rate of oxidized type gold ore by biologicals was more than 95% while the gold leaching rat...

102 The results show that the recovery of vanadium extraction from V-Fe concentrate by sodium roasting and leaching is higher than that by pyrogenic process, and the vanadium leaching rate can be 86.91%.

103 According to Darcy law, the numerical model for leaching solution seepage in an efflorescent orebody is established. This model is solved by finite element method.

104 The thiosulfate consumption in actual column leaching is same as in settling period of tank leaching system.

105 It can match tower mill which is specially used in cyaniding technology of gold leaching while pulverizing.

106 The absorption of methyl orange by ammonia leaching residue of manganese nodule is investigated.

107 The mentioned technology can be used for producing yttrium concentrate from ore leaching liquor.

108 Traditional production methods of rich titanium materials are mainly refer to Electric Smelting Law, Reduction Rust Law, Choice Chlorination Law and Acid Leaching Law.

109 The rate of haemolysis to the leaching liquor was 1.2%, which was lower than the standard criteria 5%.

110 Thiosulfate is a promising and nontoxic lixiviant replacing cyanide for leaching gold.

111 N deposition can acidify the soil and leaching the exchangeable base cations.

112 The acid leaching of manganese minerals with scrap iron a reductant a leaching of 97.

113 The process of decoppering through insoluble anode electrolysis in the solution produced by leaching high grade matte nickel using chlorine is introduced in this paper.

114 Laterine is a weathering and leaching residual soil under sub-tropical and tropical climate.

115 Among all the leachingtechnologies investigated , acid leaching, ammoniacal leaching and bacterial leaching are emphatically introduced.

116 The leaching mechanism of niobiuma refractory niobium - tantalum ore by concentrated potassium hydroxide was studied.

117 Valuable metals such as lead and silver enriches in leaching slag, which is sent to lead smelting factory to be dealt with.

118 In leaching stage the zinc oxide is separated from the calcine s.

119 Once injected into an aqueous environment, the polymeric mixture solidified into a solid implant due to the leaching of NMP.

120 The industrial tests show that the jarosite process can be used to handle the zinc calcine with high concentration of Sb by controlling the leaching rate of Sb in the neutral leaching process.

121 The lack of humus and the excessive leaching make this soil almost useless for agricultural purpose.

122 The technical approach of acidic leaching of pyrolusite ore, purifying of manganese leaching solution, and crystallizing of manganese carbonate from purified manganese solution was studied.

123 The leaching performance of the low grade molybdenite from Jinduicheng Mine is investigated by both bioleaching and chemical oxidation leaching process.

124 Leaching of simulated acid rain into the soils causes soil acidification and release of base ions.

125 The technique of lixiviant distribution is one of the key technologies in stope leaching, which can directly affect the uniformity of lixiviant spreading and leaching effect of metal.

126 The distribution of element in soil profile was related to the characteristics of elements, soil parent, topography, climate and intensity of geological leaching and biological accumulation.

127 Besides,(http:///leaching.html) activating bentonite by acid leaching and microwave has also been investigated.

128 Bacterial leaching of copper - bearing pyrite is studied by use of thiobacillus ferrooxidans.

129 The leaching process of cobalt from waste hard-alloy by use of phosphoric acid and ozogen is introduced.

130 According to control requirements of uranium leaching solution process, the paper discusses the completion of automation for uranium hydrometallurgy process by using SCADA and PLC.

131 The experimental results of column leaching of gold from As bearing refractory gold ore in Luerba by bacterial oxidation are described.

132 The study results show that using the gold extraction technology can improve leaching environment, increase gold leaching rate, decrease cyanide consumption, and shorten cyaniding leaching time.

133 This paper expounds the fundamental rules of removing ferric ions by jarosite and presents results of removing ferric ions from concentrated acid curing-trickle leaching solution of an uranium ore.

134 The seepage diffusibility of leaching solution and its wetting ability to fractured rock mass can be enhanced or weakened by the electric field.

135 This paper studies the process of the extraction of gold by ammoniacal thiosulfate leaching from the roasted copperbearing sulphureous gold concentrate.

136 The results of leaching experiments in ammonium carbonate system indicate that leaching rate is not more than 60%.

137 By investigating the process mineralogy, the occurrence states of copper in the ore were found out, thus the treatments of sulphidizing flotation and bacteria leaching of copper oxide ore were made.

138 It is currently developing and operating mineral resources in Chambishi and Luanshya, Zambia, where it owns the Chambishi copper smelter and leaching plant.

139 The aqua regia and chlorination leaching provided a rapid rate of dissolution, however, special attention should be given to strong oxidation and corrosion of reagents.

140 GLEAMS model was introduced to calculation of nitrate leaching in an agricultural catchment in Southeast China.

141 Synergic effect of the three metabolites can be observed when they were introduced for the leaching of silicate ores, as the mixture of them shows superior effect to their single operation.

142 The new technology of production of Zn powder by alkaline leaching and electrowinning is described.

143 This paper involved chemical compositions and physical phases of iron pyrite cinder and the principle of extracting iron from the cinder acid leaching.

144 An investigation is made of the catalyzing behavior of silver ions in bacterial leaching of chalcopyrite.

145 The Leaching of germanium bearing smoke of zinc oxide in the particulate fluidization bed was investigated.

146 Experimental results show the feasibility of bacterial leaching to recover copper in Shouwangfen Copper Mine.

147 The intensified leaching processes of the primary ore of copper sulfide with thermoacidophile, KY-2 strain, are investigated.

148 Atlas did not say how much the leaching plant will cost but said China's Jiangxi would fund the construction in exchange for a long-term laterite ore supply agreement.

149 Get up and drink a cup of cold water, hot water bath or leaching, the simple gymnastics, have helped to clear the brain.

150 The synthetic rutile is prepared by directly leaching ilmenite from Panzhihua area with hydrochloric acid.

151 The leaching of cobalt and arsenic was carried out under direct oxidization with Thiobacillus ferrooxidans.

152 Different methods of microbial comprehensive bioleaching are used to increase the leaching rate of chalcopyrite.

153 This contamination of groundwater and soil through landfills is known as leaching.

154 Scientific method of heap construction is an important guarantee and key link for massive mechanized gold extraction by heap leaching process.

155 The main chemical reactions of low grad zinc oxide ore in leaching process were investigated. It was thought that the reaction to zinc sulphate can occur.

156 Aimed at the feature of pumping lixivium with submersible pump in in-situ leaching mine, the electro vehicle carried device for lifting submersible pump is developed.

157 Vugular pore openings are frequently as large as an ordinary lead pencil and are usually attributed to leaching of the rock subsequent to deposition.

157 try its best to collect and create good sentences.

158 DTP transported by leaching from different treatment plots varied from 4.0 g · hm - 2 to 7.5 g · hm - 2.

159 The results showed that gold recoveries could be increased by fine grinding of concentrates , raising concentration of sodium cyanide in leaching solution and adding the regent SDM.

160 The leaching-rate of cobalt can reach as high as 99. 7% by using phosphoric acid and ozogen as leaching solution under the conditions of normal temperature and vibration.

161 Synthetic samples were prepared and studied to simulate the phase changes of iron—cobalt compounds in the reduction roasting—ammoniacal leaching processing of oxidized ore.

162 It is concluded that, in comparison with FIF, DIF significantly decreased the leaching loss of urea-N from soil, and increased the available N in soil.

163 The process of dump bioleaching of secondary copper sulfide as chalcocite and covelite includes two stages, in the first stage(), the leaching speed is faster than that in the second stage.

164 Intracutaneous injection of the leaching solution in rabbits did not induce obvious skin stimulation manifested by intradermal erythema or edema.

165 After microcrack treatment, their leaching rate can be notably increased with decrease of the content of freely soluble copper and removal of flotation reagent on mineral surfaces.

166 Shortening the heap leaching cycle period is conducive to the raising of the heap leaching rate so the output of the factory will be raised and better economic benefit obtained.

167 The function of ultra fine grinding and alkali leaching is investigated, and the mechanochemistry mechanism of accelerating pyrite decomposition is discussed.

168 Along with the attentions on the resource of Bastnaesite and environmental safety by our country, it is important to establish the clean leaching technique of Bastnaesite.

169 In order to promote current efficiency and decrease energy consumption in electro-oxidation process for molybdenite concentrate, ultrasonic wave was introduced to intensify the leaching process.

170 This paper makes a thermodynamic analysis on acid leaching process of germanium oxide dust and discusses the behaviours of mainly substances of the dust on leaching process.

171 At the same time, NH4Cl roasting method possesses selectivity to chlorinating Fe so the Fe content in leaching solution is very low. It is advantageous to recover RE in subsequent purification.

172 Jarosite process was selected for iron removal due to the characteristics of the solution originated from the reduction leaching of manganese nodules by pyrite in chloride system.

173 The deep oxidation and groundwater leaching solubilizes much of the loosely bound uranium.

174 A mathematic model for oxidation leaching of sulphide ore developed.

175 In this paper, author discussed the new methods about technology of sonochemistry to accelerate Ferric chloride leaching chalcopyrite, through different factors experiment.

176 Test results showed that use of ammoniacal solution pretreatment can effectively remove copper, and thus alleviating negative effect of copper on leaching of gold.

177 This paper deals with the effect of leaching liquor of Conyza canadensis on seed germination and seedling growth of three crops including wheat, rape and cabbage.

178 By chemical dispersion and acid leaching, silica nanowires were prepared from natural mineral chrysotile.

179 The process of preparing manganese from rhodochrosite by acid—leaching is studied and the optimum leaching condition is obtained.

180 County, the county also built on gold smelter, the formation of mining, heap leaching, smelting stop.

181 The effect of geomagnetic field on leaching uranium with geoelectric chemistry method is studied.

182 The high quality No.1 negative pole copper is produced by leaching - extraction - electrodeposition method.

183 Results showed that the leaching process could be demonstrated with the shrinking core Model.

184 In heap leaching and extraction process, the leaching rate and floccus bottlenecked production.

185 The in situ leaching is a new advanced technology of mining uranium, being used to mining exogenetic and xenogenous unconsolidated sandstone uranium deposits.

186 Results of the leaching tests on this dust showed that only 34.0% of zinc was extracted when sodium hydroxide as lixiviant in alkaline leaching.

187 The result of leaching examination showed that organic binder was better in favor of delaying nutrient release than inorganic binder.

188 The principle,(http:///leaching.html) method and case history how to predict the average uranium mass concentration in lixivium of in-situ leaching are introduced and the existing problems are discussed.

189 The treatment methods of refractory gold ores after pretreatment. such as cyaniding, intense cyaniding and non-cyanide leaching, were reviewed and compared.

190 The thermodynamic and equilibrium constant criterion of the silver leaching with cyanide is deduced.

191 Among them, leaching of meteoric water has contributed less to the formation of anomalously high porosity zones compared to other factors.

192 Indium leaching rate was more than 90 % at optimum conditions.

193 This paper made a brief description on the principles of leaching gold by biologicals.

194 The direct leaching method of roasted molybdenite with ammonia (or liquid ammonia) instead of aqueous ammonia has been described.

195 The effects of the concentration of sulfuric acid, ratio of solid to liquid, temperature and time on leaching efficiency were investigated.

196 The extracting iron from pyrite cinder by reductive roasting and sulfuric acid leaching was investigated.

197 Using the process:water leaching, zinc oxide, causticize, carbonate, solvent extract, stripping to recycle molybdenum and to regenerate alkali.

198 The gold leaching biologicals were prepared from protein rich surplus stock of food industry after changing property through hydrolysis.

199 The leaching process of the carotenoid (mainly lutein) from the sericulturist and the technology parameter are introduced in this paper.

200 A new technic for treating with flash furnace electric precipitation (FFEP) dust by leaching, oxidation, neutralization and removal arsenic by producing ferrous arsenate slag is studied.

201 The carbonate of host bed aquifer has great influence on sandstone type uranium deposit in - situ leaching.

202 The kinetics research denoted that, the efficiency of unpacking the wrappage of carrier minerals was related to different controlling conditions for pressure NaOH leaching reaction.

203 Dexing Copper Mine adopts leaching - solvent extraction - electrolysis process to recover copper from copper ore.

204 The sodium stannate from slag containing tin is prepared directly by the process including alkali fusion, leaching, purification, concentration and crystallization.

205 Through bacterial oxidation, the gold leaching rate comes from 53.4 % to 92 %.

206 The second was that cyanidation after alkali leaching was followed by flotation of cyanide residue.

207 Countering this problem, the commercial scale trail of oxygen rich leaching of peroxyl was carried out.

208 Two new processes, low temperature liquid polymerization process and leaching with solvent TE, were developed to produce insoluble sulphur.

209 The influence of SDBS on leaching of aldicarb in soil.

210 Uneven distribution of drill lixiviant for stope leaching was solved by adopting micro-irrigation technology.

211 The ore heap leaching cycle period is an important parameter that affects the output and economic technological index.

212 The process of producing vanadium pentoxide from bone coal vanadium mine without salt-roasting and acid leaching, was systematically studied.

213 The Mo recovery process was tested from the smelting slag of Bi reverberatory furnace by water quench leaching, and the tested process was compared with the present soda leaching process.

214 The results show that the hydrochemical transference can be divided into leaching stage, adsorption stage and equilibration stage.

215 The results showed that from island silicate minerals to framework silicate, the leaching abilities of the tested strain on Al and Si in them showed regular change.

216 The roasting is atmospherically leached under diluted acid, and the leaching rate of vanadic anhydride in the invention can reach over 82%.

217 The behaviour of cathodic process of leaching gold with thiosulfate has been investigated in this paper.

218 The effect of preparation conditions of the captioned process on the leaching rete and properties of the product is discussed.

219 The nitrogen fertilizer losses in paddy field involve nitrification - denitrification, ammonia volatilization nitrate leaching and runoff.

220 The polysulfide solution is one of non cyanidation systems of gold leaching in which polysulfide ions are the main effective components.

221 It is effectively on accelerating leaching speed of copper sulfide and increasing leaching rate of copper that bacteria acts on low grade copper sulfide ore.

222 Alkaline leaching of Zn from zinc oxide ore from Lanping, Yunnan is investigated.

223 This paper covers production practice of jarosite process in hot-acid leaching and comparison between iron hydroxide process and jarosite process that are used for iron removal.

224 The salts ( of the soil ) have been leaching away during a drenching rain.

225 Arsenic is a metalloid element, contaminating the environment through leaching from mineral ores, copper smelting, and other industrial and agricultural sources.

226 Sulfuric acid leaching technology of a nickeliferous spent material was studied.

227 Selective leaching of nickel(), cobalt and copper from cobalt crusts was attained by using ammonium carbonate solution and sulfur dioxide gas as a reductant.

228 This Paper discusses the method for uranium exploration based on the analysis of helium in water leaching soil samples using ion pump helium detector.

229 Compared with acid medium concentration and reaction time, temperature most notable factor to the leaching results.

230 From the relation between ore pile soakage rate and occurrence, on the basis of practice of stope leaching, the methods of lixiviant distribution for stope leaching are described in this paper.