Synthesis of amino-functionalized biochar/spinel ferrite magnetic composites for low-cost and efficient elimination of Ni(II) from wastewater
Synthesis of amino-functionalized biochar/spinel ferrite magnetic composites for low-cost and efficient elimination of Ni(II) from wastewater
复制标题
氨基功能化生物炭/尖晶石铁氧体磁性复合材料的合成，用于低成本、高效去除废水中的 Ni(II)
DOI：
10.1016/j.scitotenv.2020.137822
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发表时间：
2020-06-20
影响因子：
9.8
通讯作者：
Xu, Jinzhang
中科院分区：
文献类型：
--
作者：
Guo, Zhiqiang;Chen, Rui;Xu, Jinzhang
采用简单的一步溶剂热法合成了新型氨基改性米糠生物炭/MgFeAlO4 （RB@MgFeAlO4-NH2）磁性复合材料，并将其用于去除废水中的有毒Ni（II）。采用间歇实验和光谱技术相结合的方法，对RB@MgFeAlO4-NH2上Ni（II）的去除过程和吸附性能进行了分析。吸附等温线和动力学数据表明，在RB@MgFeAlO4-NH2上对Ni（II）的吸附是快速的单层吸附。实验结果证实所制备的RB@MgFeAlO4-NH2磁性复合材料对Ni（II）具有较高的吸附能力。RB@MgFeAlO4-NH2对Ni（II）的最大吸附量为201.62 mg g（-1）。基于吸附机理的研究表明，离子交换机理占Ni（II）吸附的76.51%。此外，氨基、羧基和羟基官能团也参与了与Ni（II）的络合作用。RB@MgFeAlO4-NH2具有环境友好、成本低、易磁分离、吸附能力高等优点，是一种低成本、高效去除水中Ni（II）的优良吸附剂。(C) 2020 Elsevier B.V.版权所有
Novel amino-modified rice bran biochar/MgFeAlO4 (RB@MgFeAlO4-NH2) magnetic composites were synthesized via a simple one-step solvothermal approach and applied for removing toxic Ni(II) from wastewater. The elimination process and sorption performance of Ni(II) on RB@MgFeAlO4-NH2 were analyzed by combining batch experiments and spectral techniques. The sorption isotherms and kinetic data indicated that Ni(II) sorption on RB@MgFeAlO4-NH2 was monolayer and rapid. The experimental results confirmed that the obtained RB@MgFeAlO4-NH2 magnetic composite had high sorption capacity for Ni(II). The maximum sorption capacity of Ni(II) on RB@MgFeAlO4-NH2 was 201.62 mg g(-1). The researches based on the sorption mechanism showed that the ion exchange mechanism accounted for 76.51% of Ni(II) sorption. In addition, the amino, carboxyl and hydroxyl functional groups were also involved in the complexation with Ni(II). In view of its multiple advantages of environmental friendliness, low cost, easy magnetic separation and high sorption capacity, RB@MgFeAlO4-NH2 will be an excellent adsorbent for low-cost and efficient elimination of Ni(II) from aqueous solutions. (C) 2020 Elsevier B.V. All rights reserved.