Enhanced arsenic removal by biochar modified with nickel (Ni) and manganese (Mn) oxyhydroxides

被引：90

作者：

Wang, Shengsen ^{[1
]}

Gao, Bin ^{[1
]}

Li, Yuncong ^{[2
]}

机构：

[1] Univ Florida, Dept Agr & Biol Engn, Gainesville, FL 32611 USA

[2] Univ Florida, Dept Soil & Water Sci, Trop Res & Educ Ctr, Homestead, FL 33031 USA

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2016年 / 37卷

基金：

美国国家科学基金会;

关键词：

Biochar; Arsenate; Ni/Mn-LDH; NiO; MnO; LAYERED DOUBLE HYDROXIDES; ZERO CHARGE; COMPOSITES; ADSORPTION; SORPTION; FE; FLUORIDE; POINT; WATER;

D O I：

10.1016/j.jiec.2016.03.048

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two biochar composites were synthesized by either pyrolysis of Ni/Mn oxide-modified pinewood feedstock (NMMF) or precipitation of Ni/Mn-LDHs onto pristine biochars (NMMB). Both sorbents were characterized and results indicated that NiO and MnO were dominant crystals in NMMF, whereas Ni/Mn-LDHs in NMMB. Sorption experiment showed that the maximum As(V) sorption capacity were 0.549 and 6.52 g kg(-1) for NMMF and NMMB, respectively. The As(V)-loaded sorbents can be easily desorbed with 0.1 NaOH, and NMMB maintained 98% removal efficiency after two to three desorption-resorption cycles. The As(V) sorption is mainly attributed to anion exchange and surface complexation by NMMB and surface complexation by NMMF. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：361 / 365

页数：5

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