一种基于D2EHPA的新型绿色协同萃取配方用于从镀镍废液中回收镍  

A novel green synergistic extraction formulation based on D2EHPA for recovering nickel from nickel plating effluent

作　　者：李英朋 罗秀玉 王忠兵 关乾 倪晨权 张捷菲 刘春力 姬海燕 罗旭彪[1] 曾桂生[1] Ying-peng LI;Xiu-yu LUO;Zhong-bing WANG;Qian GUAN;Chen-quan NI;Jie-fei ZHANG;Chun-li LIU;Hai-yan JI;Xu-biao LUO;Gui-sheng ZENG(National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization,Nanchang Hangkong University,Nanchang 330063,China;Fujian College of Water Conservancy and Electric Power,Yongan 641836,China;Key Laboratory of Biohydrometallurgy of Ministry of Education,School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China)

机构地区：[1]南昌航空大学重金属污染物控制与资源化国家地方联合工程研究中心,南昌330063 [2]福建水利电力职业技术学院,永安641836 [3]中南大学、资源加工与生物工程学院、生物冶金教育部重点实验室,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第4期1282-1295,共14页中国有色金属学报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(No.52064038);the Key Research and Development Program of Jiangxi Province,China(No.CK202002472)。

摘　　要：开发一种新型绿色协同萃取剂(二-2-乙基己基磷酸(D2EHPA)-癸醇)用于从镀镍废液中回收Ni(II)。结果表明,D2EHPA-癸醇混合载体在萃取过程中表现出显著的协同效果。当磺化煤油或葵花籽油为稀释剂时,Ni(II)的单级萃取率分别达到97.8%和97.1%。经过3次萃取后,镀镍废水中Ni(II)浓度降至1 mg/L以下。另外,在反萃取阶段,Ni(II)在D2EHPA-癸醇混合载体中的反萃取效率高于D2EHPA。机理研究表明,癸醇提供的极性基团(—OH)会破坏D2EHPA二聚体结构中的氢键,导致P—O键在范德华力的作用下变短,同时形成氧原子富电子中心,最后,P—O与Ni离子在静电力促使下形成新的P—O—Ni结构。A new green synergistic extraction agent(di-2-ethylhexyl phosphoric acid(D2EHPA)−decanol)was developed to recycle Ni(II)from nickel plating effluent.The results show that the D2EHPA−decanol mixture carrier provided a significant synergistic effect in the process.When sulfonated kerosene or sunflower seed oil was used as a diluent,the single extraction efficiency of Ni(II)reached 97.8%and 97.1%,respectively.After three-times extraction,the Ni(II)concentration in the nickel plating effluent decreased to below 1 mg/L.Additionally,in the stripping stage,the stripping efficiency of Ni(II)in the D2EHPA−decanol mixed carrier was larger than that of D2EHPA.Mechanism studies indicate that the polar groups(—OH)from decanol initially break the hydrogen bonds in the D2EHPA dimer structure.Afterwards,van der Waals forces shorten the bond length of P—O to form electron-rich centers of O atoms.Finally,a new P—O—Ni structure is formed through interactions between P—O bond and nickel ions under electrostatic forces.

关 键 词：协同萃取 废水 镍 D2EHPA 绿色稀释剂 

分 类 号：TF815[冶金工程—有色金属冶金] X781.1[环境科学与工程—环境工程]