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dissolution kinetics of the sulfide

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Using kinetic geochemical testwork to assist with mine

Kinetic testwork is needed because sulfide oxidation rates vary with the specific type of reactive sulfide,including mineralogy s yrite,pyrrhotite,(e.g.p chalcopyrite,etc),thermo-barometric and structural evolution metamorphic grade and deformation (e.g.The overlooked oxidative dissolution of silver sulfide Three reasons might be accountable for the acceleration of Ag + dissolution 1) decomposition of PS can induce the formation of H +,which may also render the dissolution of metal sulfides; 2) the activation of PS was facilitated to generate more radicals to oxidize Ag 2 S-NPs; 3) increasing temperature may promote the direct oxidation of Ag 2 S-NPs by PS.These possibilities wereThe effect of sulfide ion chemisorption on the kinetics of The effect of sodium sulfide additions (from 5 dissolution kinetics of the sulfide#215; 106 to 2 dissolution kinetics of the sulfide#215; 105 M) on the kinetics of gold dissolution in cyanide solutions of the following composition,M 0.1 KCN,0.02 KAu(CN)2,0.5

The effect of sulfide ion chemisorption on the kinetics of

The effect of sodium sulfide additions (from 5 dissolution kinetics of the sulfide#215; 106 to 2 dissolution kinetics of the sulfide#215; 105 M) on the kinetics of gold dissolution in cyanide solutions of the following composition,M 0.1 KCN,0.02 KAu(CN)2,0.5 THE KINETICS OF THE DISSOLUTION OFof the residues,a mechanism involving non-oxidative dissolution of the mineral coupled to oxidation of the product hydrogen sulfide will be proposed.The latter reaction is shown to occur predominantly by a copper ion catalyzed reaction with dissolved oxygen.The results of an independent study of the kinetics of this reaction will beSulfur dioxide leaching of zinc sulfideStudies were conducted into the mechanism and kinetics of the dissolution of synthetic zinc sulfide and zinc concentrate in aqueous solutions containing sulfur dioxide.Experiments at ambient temperature established that the dissolution of ZnS in aqueous solutions of sulfur dioxide proceeds via acidic non-oxidative dissolution and not by direct reaction of the sulfide with S02(aq).

Sulfide oxidation and iron dissolution kinetics during the

Dec 15,2003 dissolution kinetics of the sulfide#0183;Rates of both sulfide oxidation and Fe(II) dissolution (in mol l 1 min 1) were expressed in terms of an empirical rate equation of the form R=k i (H 2 S) t=0 0.5 A where k i represents the apparent rate constants for the oxidation of sulfide (k S) or the dissolution of Fe 2+ (k Fe),(H 2 S) t=0 is the initial sulfide concentration (in mol l 1) and A is the initial ferrihydrite surface area (in m 2 l 1).Simulation of the kinetics of the autoclave dissolution of Kinetic regularities of the oxidative autoclave dissolution of iron,copper,and nickel sulfides when leaching the ore of the Shanuch deposit are investigated in controllable experimental conditions.Simulation of the kinetics of the autoclave dissolution of A mathematical description of the characteristic stages of the autoclave oxidative dissolution of iron of the nickel-containing sulfide ore is preformed.It is assumed that the process kinetics is determined by the regularities of the external diffusion,and the most probable limiting stage of the process is oxygen absorption by the pulp.

Rate of Sulfur Dissolution in Aqueous Sodium Sulfide

Kinetics of the nucleophilic dissolution of hydrophobic and hydrophilic elemental sulfur sols by sulfide.Geochimica et Cosmochimica Acta 2020,269,554-565.DOI 10.1016/j.gca.2019.11.010.Yizhak Tzvi,Yaron Paz.Highly efficient method for oxidation of dissolved hydrogen sulfide in water,utilizing a combination of UVC light and dissolved oxygen.Rate of Sulfur Dissolution in Aqueous Sodium Sulfide Kinetics of the nucleophilic dissolution of hydrophobic and hydrophilic elemental sulfur sols by sulfide.Geochimica et Cosmochimica Acta 2020,269,554-565.DOI 10.1016/j.gca.2019.11.010.Yizhak Tzvi,Yaron Paz.Highly efficient method for oxidation of dissolved hydrogen sulfide in water,utilizing a combination of UVC light and dissolved oxygen.Previous123456NextKinetics of Dissolution and Equilibrium in Solution of The development of the kinetic expression for the dissolution of a nickeliferous sulfide by ferric sulfate and of pyrite by oxygen and ferric sulfate on the basis of its oxidation mechanism is discussed.The rate of dissolution of complex ores is determined not only by the kinetics of the heterogenous reactions (solid-liquid reactions) but also by the homogenous reactions taking place

New Insights into the Dissolution of Iron Sulfide Using

The sampling time of the dissolution process set at 1,2,4,8,20,30,and 72 hours determined the kinetics of the scale-dissolution process and helped optimize the treatment time.A dissolver/scale ratio of 100:1,50:1,and 20:1 cm 3 /g were tested.New Insights into the Dissolution of Iron Sulfide Using Dec 17,2020 dissolution kinetics of the sulfide#0183;The kinetics study showed that the optimum treatment depended on the pH of the chelating agent.For pH dissolution kinetics of the sulfidelt; 5 dissolvers,16 to 20 hours was sufficient to obtain the maximum dissolution capacity.For dissolvers with a pH greater than 10,the dissolution continued for more than 72 hours and was minimal.Mercury Sulfide Dissolution in EnvironmentalThis dissertation,written by Ping Jiang,and entitled Mercury Sulfide Dissolution in Environmental Conditions Thermodynamic and Kinetic Approaches,having been approved in respect to style and intellectual content,is referred to you for judgment.We have read this dissertation and recommend that it

Leaching mechanism of tetrahedrite in Alkaline Sulfide

The dissolution kinetics of tetrahedrite in aqueous alkaline sodium sulfide solutions was investigated in this present study.The effect of mineral particle size,reaction temperature,sodium sulfide and sodium hydroxide concentrations on the rate of dissolving antimony from tetrahedrite were studied.Kinetics of the dissolution of zinc sulfide in an Kinetics of the dissolution of zinc sulfide in an oxidizing slag Gupta,Suresh K.Abstract.A new concept has been developed for the production of zinc from zinc and complex zinc concentrates.It is a two-stage process involving oxidation of zinc sulfide to oxide and dissolution into slag and the fuming of zinc from the slag by injecting Kinetics of the dissolution of zinc sulfide in an A new concept has been developed for the production of zinc from zinc and complex zinc concentrates.It is a two-stage process involving oxidation of zinc sulfide to oxide and dissolution into slag and the fuming of zinc from the slag by injecting carbonaceous materials into it to produce zinc vapors which can be subsequently condensed in a lead-splash condenser such as those used in the

Kinetics of the Reaction between Dissolved Sodium Sulfide

Dec 18,2004 dissolution kinetics of the sulfide#0183;The kinetics of the heterogeneous reaction between dissolved sodium sulfide and biologically produced sulfur particles has been studied by measuring the formation of polysulfide ions,Sx2-,in time (pH = 8.0,T = 3050 dissolution kinetics of the sulfide#176;C).Detailed knowledge of this reaction is essential to understand its effect on a biotechnological hydrogen sulfide removal process.The data were fitted with a reaction Images of dissolution kinetics of the sulfide imagesKinetics Study of Iron Sulfide Scale Dissolution Abu Following the development of the iron sulfide dissolver presented in ADIPEC 2017,this work focuses on the improvement of the kinetics of iron sulfide dissolution,the kinetic factors of the dissolution rate.The non-acidic iron sulfide dissolver was used in lab dissolution tests.The effect of dissolution temperature,particle size,agitation,and ratio of volume of dissolver and mass of scale,were studied.Full Dissolution of the Whole Lithium Sulfide Family Full Dissolution of the Whole Lithium Sulfide Family (Li 2 S 8 to Li 2 S) in a Safe Eutectic Solvent for Rechargeable LithiumSulfur Batteries Shuping Zhuo,Feng Li,Factors of Kinetics Processes in LithiumSulfur Reactions,Energy Technology,10.1002/ente.201900574,7,12,(2019).Wiley

Evaluation of Chelating Agents for Iron Sulfide FeS Scale

However,chelating agents have been scarcely studied for iron sulfide dissolution.This paper investigates Ethylenediaminetetraacetic acid (EDTA),Diethylenetriaminepentaacteic acid (DTPA),and N-(2-Hydroxyethyl)ethylenediamine-N,N,N-triacetic acid (HEDTA) for its iron sulfide (FeS) dissolution capacity and kinetics at 150 dissolution kinetics of the sulfide#176;F.Dissolution kinetics of the sulfide-oxide complex 15 rows dissolution kinetics of the sulfide#0183;Sep 01,2020 dissolution kinetics of the sulfide#0183;Dissolution kinetics of the sulfide-oxide complex inclusion and its surrounding matrix of X70 Dissolution Kinetics of Heavy Metals in Dutch Carbonate In two sulfiderich freshwater sediments from the Biesbosch and Kromme Rijn River in the Netherlands differing in carbonate content and acid volatile sulfide (AVS) content,metal and sulfide dissolut

Dissolution Kinetics of Different Inorganic Oilfield

Nov 16,2020 dissolution kinetics of the sulfide#0183;For the sulfide scale,the highest dissolution in borax formulation was obtained with galena (lead sulfide,PbS),followed by pyrrhotite,and the lowest dissolution was reported for pyrite (1.55 dissolution kinetics of the sulfide#215; 10-8 molL-1 s-1 cm-2).Borax formulation was found to be inefficient in the removal of sulfate scales with a dissolution rate lower than Disproportionation of Aqueous Sulfur and Sulfide Kinetics DOI 10.1021/JP962661H Corpus ID 95188801.Disproportionation of Aqueous Sulfur and Sulfide Kinetics of Polysulfide Decomposition @article{Licht1997DisproportionationOA,title={Disproportionation of Aqueous Sulfur and Sulfide Kinetics of Polysulfide Decomposition},author={S.Licht and J.S.Davis},journal={Journal of Physical Chemistry B},year={1997},DISSOLUTION KINETICS OF SMITHSONITE IN BORIC2006).The results of a dissolution kinetics study of low-grade zinc silicate ore with sulfuric acid by Abdel-Aal (2000) showed that dissolution of about 94% of zinc is achieved using 200270 mesh ore particle size at a reaction temperature of 70 oC for 180 min reaction time with 10% sulfuric acid concentration.Dissolution kinetics

Cited by 2Publish Year 2020Author Gengxin Li,Liwei Wang,Huiliang Wu,Chao Liu,Xin Wang,Zhongyu Cui STEEL INCLUSION COCORROSION CONDITIDISSOLUTION TDISTINCT CHAR X100 steel Al-Mg-Ca-O NS4 solution,t =7 21h Type A Drop-off of the i Q460 steel (RE) 2 O 2 S- (R0.1 % NaCl + 0.05 % N Type A The inclusion is fi X70 steel x Al 2 O 3 y Ca NS4 solution,t =24h Type A The interfacial ar TRIP steel MnSAl 2 O 3 3.5 % NaCl,t =1h Type B The corrosion of t 15 rows on sciencedirectTHE FUNDAMENTAL DISSOLUTION KINETICS OF SILVER

silver sulfide dissolution is supressed by sulfide-saturation in the solution,while mercury dissolution is inhibited by the growth of sulfur-rich product layers on the particles.Kinetic results were compared to extraction experiments conducted on a spent Heap Leach ResidueCited by 1Publish Year 2020Author Jennifer M.Hartley,Ahmed Z.M.Al-Bassam,Robert C.Harris,Gero Frisch,Gawen R.T.Jenkin,Andrew 12345NextTHE FUNDAMENTAL DISSOLUTION KINETICS OFsilver sulfide dissolution is supressed by sulfide-saturation in the solution,while mercury dissolution is inhibited by the growth of sulfur-rich product layers on the particles.Kinetic results were compared to extraction experiments conducted on a spent Heap Leach ResidueCited by 179Publish Year 2003Author Simon W PoultonTHE EFFECT OF DISSOLVED OXYGEN ON THE(1 dissolution kinetics of the sulfidelt; pH dissolution kinetics of the sulfidelt;3) the kinetics of sulfide aqueous dissolution is significantly different among different sulfide phases,e.g.,PbS,ZnS,CuFeS2' AsFeS,and FeS2' Whereas sorne sulfides such as pyrite,galena,and arsenopyrite dissolve remarkably slower in the absence of dissolved oxygen,the dissolution rates of other sulfides (e.g.,sphaleri te and chalcopyri te) are independent of the dissolved oxygen concentration.

Chemical dissolution of sulfide minerals

Chemical dissolution treatments involving the use of aqua regia,4 N HNO3,H2O2-ascorbic acid,oxalic acid,KClO3+HCl,and KClO3+HCl followed by 4 N HNO3 were applied to specimens of nine common sulfide minerals (galena,chalcopyrite,cinnabar,molybdenite,orpiment,pyrite,stibnite,sphalerite,and tetrahedrite) mixed individually with a clay loam soil.Author J.Cama,P.Acero,C.Torren T dissolution kinetics of the sulfide#243;,C.Ayora,J.SolerPublish Year 2006Investigating the dissolution of iron sulfide and arsenide Dec 01,2020 dissolution kinetics of the sulfide#0183;The chemical and electrochemical dissolution of sulfide minerals such as pyrite,marcasite,pyrrhotite and arsenopyrite have been widely studied in aqueous systems (Schippers et al.,1996; Corkhill and Vaughan,2009) due to the influence that the oxidation products of these minerals have upon ground water and surface water overflow (Savage et al.,2000; Foster et al.,1998;Author Danyu Huang,Ning Chen,Changyin Zhu,Guodong Fang,Dongmei ZhouPublish Year 2021(PDF) A study on the zinc sulfide dissolution kinetics A study on the zinc sulfide dissolution kinetics with biological and chemical ferric reagents. ferent temperatures to study the mechanism of ZnS dissolution and its kinetics.The kinetic

A study on the zinc sulfide dissolution kinetics with

ZnS dissolution mechanism and kinetics with the biological ferric re-agent.The kinetics for sphalerite dissolution in presence of ferric sulfate was also studied,and results obtained have been A study on the zinc sulfide dissolution kinetics with ZnS dissolution mechanism and kinetics with the biological ferric re-agent.The kinetics for sphalerite dissolution in presence of ferric sulfate was also studied,and results obtained have been (PDF) Dissolution kinetics of glassy arsenic sulfide in Dissolution kinetics of glassy and crystalline As2S3 in aqueous sodium sulfide and hydroxide solutions was investigated.Glass,produced by rapid quenching contains frozen products of arsenic

(PDF) Dissolution kinetics of copper ores and concentrate

An experimental study of the comparative kinetics of dissolution of various synthetic copper sulphides (covellite,chalcocite,and digenite) in dilute chloride solutions has been carried out at

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