标题：Single and Binary Competitive Adsorption of Cobalt and Nickel onto Novel Magnetic Composites Derived from Green Macroalgae
作者：Zhong, Qian-Qian; Zhao, Ya-Qin; Shen, Li; Hao, Bin; Xu, Xing; Gao, Bao-Yu; Shang, Ya-Nan; Chu, Kai-Zhi; Zhang, Xue-Hua; Yue, Qin-Yan
作者机构：[Zhong, Qian-Qian; Shen, Li; Hao, Bin; Chu, Kai-Zhi; Zhang, Xue-Hua] Tangshan Univ, Prov Expt Teaching Demonstrat Ctr Environm Engn, Dept Environm & C 更多
通讯作者地址：Zhong, QQ (corresponding author), Tangshan Univ, Prov Expt Teaching Demonstrat Ctr Environm Engn, Dept Environm & Chem Engn, Tangshan 063000, Peoples 更多
来源：ENVIRONMENTAL ENGINEERING SCIENCE
关键词：cobalt and nickel; Enteromorpha prolifera; magnetic material;; radioactive wastewater; single and binary adsorption
摘要：Easily separated novel magnetic composite, derived from a kind of green macroalgae-Enteromorpha prolifera, was employed for effective adsorption of radioactive cobalt (Co-60) and nickel (Ni-63). The characteristics and adsorption mechanisms of the magnetic E. prolifera composite (MEPE) were investigated by VSM, XRD, FT-IR, SEM, TEM, BET, and XPS. The results indicated that the saturated magnetization exceeded 4.90 emu/g. The surface area and average pore diameter of MEPE were 10.995 m(2)/g and 5.49 nm, respectively. The biosorbent had a good affinity to both Co(II) and Ni(II) with the maximum adsorption capacity of 135 and 137 mg/g, respectively. Coexisting nonradioactive ions, like Na+, K+, Mg2+, and Ca2+, affected the sequestration of Co and Ni to a limited degree. Compared with the single-component system, the uptake of Co(II)/Ni(II) for the binary-component adsorption decreased due to competitive adsorption. The potential mechanism of Co(II)/Ni(II) removal by MEPE was mainly electrostatic attraction and surface complex formation. Hydroxyl groups and amine groups in MEPE could be involved in the reaction and adsorption process, and the novel biosorbent MEPE could achieve rapid separation from radioactive wastewaters and effective uptake of Co(II) and Ni(II) simultaneously.