白云石诱导NiS沉淀除Ni^(2+)机理分析  

Mechanism Analysis of NiS Precipitation Induced by Dolomite for Ni^(2+)Removal

作　　者：钟新新 丁雅楠 李怡冰 陈平[1] Zhong Xinxin;Ding Ya’nan;Li Yibing;Chen Ping(School of Chemistry&Chemical Engineering,Xinjiang Normal University,Urumqi 830054,China)

机构地区：[1]新疆师范大学化学化工学院,新疆乌鲁木齐830054

出　　处：《广东化工》2023年第3期190-192,共3页Guangdong Chemical Industry

基　　金：国家自然科学基金地区基金项目(41867051)。

摘　　要：开展了河北白云石诱导NiS沉淀除Ni2+前后载体的SEM、XRD表征,结合反应活化能,利用ζ电位及双电层理论分析了白云石诱导NiS沉淀除Ni^(2+)机理。结果显示,白云石诱导NiS沉淀过程中,沉淀产物NiS附着在白云石表面,沉淀反应也应发生在白云石表面;与无载体时相比,诱导反应历程发生变化,S2^(-)与反离子吸附层Ni^(2+)发生反应代替了无载体时溶液本体中的两者反应,载体表面NiS沉淀势远大于溶液本体,导致去除率及反应速率提高。The carrier was characterized by SEM and XRD before and after the Ni^(2+)precipitation induced by Hebei dolomite.The mechanism of Ni^(2+)precipitation induced by Hebei dolomite was analyzed using reaction activation energy,ζpotential,and double layer theory.The results show that during the process of NiS precipitation induced by dolomite,the precipitated product is attached to the dolomite surface,and the precipitation reaction should also occur on the dolomite surface.Compared with that without a carrier,the induced reaction process changed.S2^(-)reacted with the anti-ion adsorption layer Ni^(2+)instead of the reaction between the two in the solution body without a carrier.The precipitation potential of NiS on the carrier surface was much larger than that in the solution body,leading to an increase in removal rate and reaction rate.

关 键 词：白云石 诱导 NiS沉淀 除Ni2+ 机理分析 

分 类 号：TQ[化学工程]