Enhanced Arsenic Removal from Aqueous Solution by Fe/Mn-C Layered Double Hydroxide Composite

被引：27

作者：

Wang, Yaru ^{[1
,2
]}

Gao, Yingying ^{[1
,2
]}

Zhu, Zongqiang ^{[1
,2
,3
]}

Zhang, Lihao ^{[1
,2
]}

Zhao, Ningning ^{[1
,2
]}

Fang, Yali ^{[1
,2
]}

Zhu, Yinian ^{[1
,2
]}

Liu, Guifeng ^{[1
,2
]}

机构：

[1] Guilin Univ Technol, Collaborat Innovat Ctr Water Pollut Control & Wat, Guilin 541004, Peoples R China

[2] Guilin Univ Technol, Guangxi Key Lab Environm Pollut Control Theory &, Guilin 541004, Peoples R China

[3] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

来源：

ADSORPTION SCIENCE & TECHNOLOGY | 2021年 / 2021卷

基金：

中国国家自然科学基金;

关键词：

EFFICIENT REMOVAL; WASTE-WATER; ADSORPTION; AS(III); IRON; NANOPARTICLES; BIOCHAR; PERFORMANCE; MECHANISM; ADSORBENT;

D O I：

10.1155/2021/8891643

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A novel material named Fe/Mn-C layered double hydroxide composite (Fe/Mn-C-LDH) was synthesized to remove arsenic from an aqueous solution. The removal performance of the composite toward arsenic ions was studied through the batch experiments. The experiment results showed that Fe/Mn-C-LDH exhibited a high adsorption capacity of 46.47 mg/g for As(III) and 37.84 mg/g for As(V) at 318 K, respectively. In addition, the investigation of the release of Fe3+ and Mn2+ in the process of arsenic adsorption revealed that the Fe/Mn-C-LDH exhibited better stability than Fe/Mn-layer double hydroxide (Fe/Mn-LDH) with fewer Mn2+ and Fe3+ releasing under the same condition. The BET results showed that the specific surface area of Fe/Mn-C-LDH decreased after adsorption of As (III) and As (V). Furthermore, the Density Functional Theory (DFT) calculation results proved that the adsorbent combining arsenic by T-site to produce a better adsorption effect for arsenic. Possessing better stability and adsorption capacity, Fe/Mn-C-LDH could potentially serve as a perfect adsorbent for arsenic removal from an aqueous environment. It would provide a promising approach for removing heavy metal from the aquatic environment in the future.

引用

页数：12

共 51 条

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