INVESTIGATION OF ACQUISITION OF TRIPLE SULFURS FROM Pb(CH3COO)2-Na3AsO4-H2S-H2O SYSTEM BY HYDROCHEMICAL METHOD

Authors : Hüseyn İMANOV, Qorxmaz HUSEYNOV

Pages : 35-40

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Publication Date : 2020-11-30

Article Type : Research Paper

Abstract :Acquisition conditions by hydrothermal method of triple sulfides from Pbinsert ignore into journalissuearticles values(CH3COO);2-Na3AsO4-H2S-H2O system were investigated using X-ray phase insert ignore into journalissuearticles values(X-ray);, Differential Thermal insert ignore into journalissuearticles values(DTA); and Scanning Electron Microscopy insert ignore into journalissuearticles values(SEM); analysis, TG analysis methods. It was determined that sediments were obtained containing Pb26+xAs12S44+x content in pH=1-6 range and Pb28-xAs12S46-x content insert ignore into journalissuearticles values(0,6 < x < 1,5); in pH=6-14 range. The durability limits of PbS, As2S5, As2S3, Pbinsert ignore into journalissuearticles values(OH);2, and Na3AsO4 were determined, and pCb-pH insert ignore into journalissuearticles values(pCb- difference between initial and final concentrations of metal); diagram was formed. The results of the X-ray phase analysis methods indicate that when the precipitates having a Pb:As:S=1:2:4; 2:2:5 and 9:4:15 molar ratio insert ignore into journalissuearticles values(pH=1-6); are thermally processed in vacuum at 400 °C insert ignore into journalissuearticles values(~10-2 Pa); in a dual-zone regime, phases containing PbAs2S4, Pb2As2S5 and Pb9As4S15 are conveniently formed. All three compounds are composed of nanoparticles, and high adhesion between particles is observed. Depending on the pH, concentration, and temperature of the condition, a large number of different precipitates and layers are obtained in the Pbinsert ignore into journalissuearticles values(CH3COO);2-Na3AsO4-H2S-H2O system. Based on TG analysis, the stoichiometric composition of PbAs2S4, Pb9As4S15, and Pb2As2S5 compounds was determined.
Keywords : triple sulfur, hydrochemical sedimentation, semiconductor, concentration, phase, micromorphology