季鏻化微球一步法制备及其对Au(S_(2)O_(3))_(2)^(3-)的吸附  

One-step Synthesis of Quaternary Phosphonium Microspheres for Adsorption Au(S_(2)O_(3))_(2)^(3-)

作　　者：王忠影 陈树梁 李鑫容 赵莉[2] 林玥 字富庭[1,2] 胡显智[1,2] WANG Zhong-ying;CHEN Shu-liang;LI Xin-rong;ZHAO Li;LIN Yue;ZI Fu-ting;HU Xian-zhi(Faculty of Science,Kunming University of Science and Technology,Kunming 650500,China;Faculty of Land Sources Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学理学院,昆明650500 [2]昆明理工大学国土资源工程学院,昆明650093

出　　处：《离子交换与吸附》2024年第3期246-254,I0003,共10页Ion Exchange and Adsorption

基　　金：国家自然科学基金(基金号52264031)。

摘　　要：以三苯基膦(TPP)、氯甲基化聚苯乙烯微球(PS-Cl)为原料,通过一步法制备了用于回收硫代硫酸盐浸金体系中Au(I)的季鏻化微球(PS-QP)。文章探究了硫代硫酸盐溶液性质对PS-QP吸附Au(I)的影响,用FT-IR、SEM-EDS、XPS对样品进行表征,探讨Au(I)在PS-QP表面的吸附机理。结果表明:PS-QP对Au(I)的吸附几乎不受pH值(pH=6~11)影响;PS-QP吸附Au(I)的过程符合准二级动力学和Langmuir模型,理论负载量为23.7 mg·g^(-1),与实际负载量(23.5 mg·g^(-1))相近;PS-QP表现出良好的循环性能和实际使用效果,经5次吸附—解吸循环后对Au(I)单次负载量为7.0 mg·g^(-1),在实际浸出液中Au(I)单次吸附率达91.7%。PS-QP吸附Au(I)的机理为溶液中的Au(S_(2)O_(3))_(2)^(3-)与PS-QP的Cl^(-)发生阴离子交换,以实现Au(I)在PS-QP上的富集。pH值、硫代硫酸盐浓度对负载量影响较小,吸附、解吸对PS-QP的强度无明显影响,在硫代硫酸盐提金工艺中具有良好的实际应用潜力。Using triphenylphosphine(TPP)and chloromethyl polystyrene microspheres(PS-Cl)as raw materials,phosphonium quaternary microspheres were prepared by one-step process and used for the recovery of Au(I)in thiosulfate leaching system.In this paper,the influence of the properties of thiosulfate solution on the adsorption of Au(I)by PS-QP was investigated,and the samples were characterized by FT-IR,BET,SEM-EDS and XPS,and the adsorption mechanism of Au(I)on the surface of PS-QP was proposed.The results show that the adsorption of Au(I)by PS-QP is almost unaffected by pH(pH=6~11).The adsorption of Au(I)by PS-QP conforms to the pseudo-second-order kinetics and Langmuir model,and the theoretical load is 23.7 mg·g^(-1),which is close to the actual load(23.5 mg·g^(-1)).PS-QP showed good cycling performance and actual application effect.After five sorption-desorption cycles,the single loading of Au(I)was 7.0 mg·g^(-1),and the recovery rate of gold in the actual leaching solution was 91.7%.The mechanism of adsorption of Au(I)by PS-QP is the anion exchange between Au(S_(2)O_(3))_(2)^(3-)in solution and Cl^(-)on PS-QP to achieve the gathering of Au(I)on PS-QP.pH and thiosulfate concentration have negligible effect on the loading capacity of gold,and adsorption and desorption virtually have no effect on the strength of PS-QP,which has good actual application potential in thiosulfate gold extraction process.

关 键 词：季鏻化微球 硫代硫酸盐 吸附 Au(S_(2)O_(3))_(2)^(3-) 一步法 

分 类 号：R284.2[医药卫生—中药学]