Biosorption of Co (II) from aqueous solution using algal biochar: Kinetics and isotherm studies

被引：131

作者：

Bordoloi, Neonjyoti ^{[1
]}

Goswami, Ritusmita ^{[2
]}

Kumar, Manish ^{[2
]}

Kataki, Rupam ^{[1
]}

机构：

[1] Tezpur Univ, Dept Energy, Tezpur 784028, Assam, India

[2] Tezpur Univ, Dept Environm Sci, Tezpur 784028, Assam, India

来源：

BIORESOURCE TECHNOLOGY | 2017年 / 244卷

关键词：

Biochar; Adsorption; Heavy metal; Microalgae; HEAVY-METALS; ADSORPTION; REMOVAL; PYROLYSIS; COBALT;

D O I：

10.1016/j.biortech.2017.05.139

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The present investigation deals with the utilization of biochar derived from the pyrolysis of microalgae Scenedesmus dimorphus as an adsorbent for the removal of cobalt (II) ion (Co) from aqueous solution. A series of experiments were conducted in a batch system to evaluate the performance of the biochar for Co removal. The effect of contact time on adsorption of Co (II) onto surface of the biochar was investigated. The equilibrium sorption data were analyzed by using Langmuir, Freundlich, Temkin, Harkins-Jura and Dubinin-Radushkevich (D-R) isotherms and were found to be adequate in describing the Co adsorption onto the biochar. Equilibrium data were well fitted for Freundlich, Temkin and D-R isotherms. The kinetic study of Co (II) adsorption on microalgae biochar were described by applying pseudo-first-order and pseudo-second-order rate equations. The surface of adsorbent before and after the removal of Co (II) was characterized by using SEM, EDX and XRD analysis. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：1465 / 1469

页数：5

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