Calcium-rich biochar from crab shell: An unexpected super adsorbent for dye removal

被引：201

作者：

Dai, Lichun ^{[1
,2
]}

Zhu, Wenkun ^{[3
]}

He, Li ^{[1
,2
]}

Tan, Furong ^{[1
,2
]}

Zhu, Nengmin ^{[1
,2
]}

Zhou, Qin ^{[4
]}

He, Mingxiong ^{[1
,2
]}

Hu, Guoquan ^{[1
,2
]}

机构：

[1] Minist Agr, Biogas Inst, Sect 4-13,Renmin Rd South, Chengdu 610041, Sichuan, Peoples R China

[2] Key Lab Dev & Applicat Rural Renewable Energy, Chengdu 610041, Sichuan, Peoples R China

[3] Southwest Univ Sci & Technol, Sichuan Coinnovat Ctr New Energet Mat, Mianyang 621010, Peoples R China

[4] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effect, Beijing 100085, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2018年 / 267卷

基金：

中国国家自然科学基金;

关键词：

Crab shell; Biochar; Dye; Adsorption; Malachite green; Congo red; HIGH ADSORPTION CAPACITY; NITROGEN-DOPED CARBON; METHYLENE-BLUE; WASTE-WATER; AQUEOUS-SOLUTIONS; GRAPHENE-OXIDE; CONGO RED; ACTIVATED CARBONS; MALACHITE GREEN; ORGANIC POLLUTANTS;

D O I：

10.1016/j.biortech.2018.07.090

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Adsorption is the common-used method to remove dyes from wastewater, and many efforts have been made to develop low-cost but excellent adsorbents. Here, calcium-rich biochar (CRB) as a low-cost adsorbent was directly prepared from crab shell via a simple pyrolysis process without any modification. Batch adsorption results suggested that CRB was among the dye adsorbents with highest adsorption capacities and fastest adsorption rate. Specifically, it showed high adsorption capacities of 12,502 and 20,317 mg/g for cationic malachite green and anionic Congo red, respectively. The adsorption equilibrium for Congo red onto CRB could be achieved as short as 2 min. Furthermore, the dye adsorption mechanism for CRB, as investigated by zeta potential and FTIR spectra, could be attributed to electrostatic attraction, hydrogen bonding and p-p interaction. Finally, this study suggested that, attributed to its cheap source, simple synthesis process and excellent adsorption performance, CRB was promising in dye removal.

引用

页码：510 / 516

页数：7

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