Low-cost adsorbent derived from the coconut shell for the removal of hexavalent chromium from aqueous medium

被引：29

作者：

Chandana, L. ^{[1
]}

Krushnamurty, Killi ^{[1
]}

Suryakala, Duvvuri ^{[1
]}

Subrahmanyam, Ch. ^{[1
]}

机构：

[1] Indian Inst Technol Hyderabad, Dept Chem, Kandi 502285, Telangana, India

来源：

MATERIALS TODAY-PROCEEDINGS | 2020年 / 26卷

关键词：

Adsorption; Activated carbon; Kinetics; Adsorption isotherms; Thermodynamic parameters; ACTIVATED CARBON; METHYLENE-BLUE; CR(VI) REMOVAL; WASTE-WATER; BIO-WASTE; ADSORPTION; KINETICS; EQUILIBRIUM; SAWDUST; VI;

D O I：

10.1016/j.matpr.2019.04.205

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A bio-adsorbent was derived from the coconut shells and surface modification of the adsorbent was done by physical activation by using carbon dioxide (CO2), ozone (O-3) and steam (H2O). The consequence of physical activation on the physicochemical properties was analyzed by N-2 adsorption, thermogravimetric analysis (TGA) and temperature programmed decomposition (TPD). Typical results indicated that the physical activation of carbon is an efficient approach for the removal of heavy metal Cr(VI) from the aqueous solution and the best adsorption was achieved at pH 2.0. The equilibrium studies indicated that Cr(VI) adsorption follows Langmuir adsorption isotherm and pseudo-2nd-order kinetics. (C) 2018 Elsevier Ltd.

引用

页码：44 / 51

页数：8

共 33 条

[1] ADSORPTION OF CHROMIUM ION (VI) BY ACID ACTIVATED CARBON [J].

Attia, A. A. ;

Khedr, S. A. ;

Elkholy, S. A. .

BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING, 2010, 27 (01) :183-193

[2] Cr(VI) removal from synthetic wastewater using coconut shell charcoal and commercial activated carbon modified with oxidizing agents and/or chitosan [J].

Babel, S ;

Kurniawan, TA .

CHEMOSPHERE, 2004, 54 (07) :951-967

[3] Influence of hydrogen peroxide on the simultaneous removal of Cr(VI) and methylene blue from aqueous medium under atmospheric pressure plasma jet [J].

Chandana, L. ;

Lakshminarayana, B. ;

Subrahmanyam, Ch. .

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 2015, 3 (04) :2760-2767

[4] Acid/base-treated activated carbons: Characterization of functional groups and metal adsorptive properties [J].

Chen, JP ;

Wu, SN .

LANGMUIR, 2004, 20 (06) :2233-2242

[5] Toxic and mutagenic effects of chromium(VI). A review [J].

CieslakGolonka, M .

POLYHEDRON, 1996, 15 (21) :3667-3689

[6] Removal of hexavalent chromium with a lignocellulosic substrate extracted from wheat bran [J].

Dupont, L ;

Guillon, E .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2003, 37 (18) :4235-4241

[7] Removal of chromium from Cr(VI) polluted wastewaters by reduction with scrap iron and subsequent precipitation of resulted cations [J].

Gheju, M. ;

Balcu, I. .

JOURNAL OF HAZARDOUS MATERIALS, 2011, 196 :131-138

[8] Adsorption kinetics for the removal of chromium(VI) from aqueous solution by adsorbents derived from used tyres and sawdust [J].

Hamadi, NK ;

Chen, XD ;

Farid, MM ;

Lu, MGQ .

CHEMICAL ENGINEERING JOURNAL, 2001, 84 (02) :95-105

[9] Kinetics and mechanism of removal of methylene blue by adsorption on various carbons - a comparative study [J].

Kannan, N ;

Sundaram, MM .

DYES AND PIGMENTS, 2001, 51 (01) :25-40

[10] Chromium(VI) adsorption from aqueous solution by Hevea Brasilinesis sawdust activated carbon [J].

Karthikeyan, T ;

Rajgopal, S ;

Miranda, LR .

JOURNAL OF HAZARDOUS MATERIALS, 2005, 124 (1-3) :192-199

← 1 2 3 4 →