Studies on the Removal of Arsenate by Electrochemical Coagulation Using Aluminum Alloy Anode

被引：45

作者：

Vasudevan, Subramanyan ^{[1
]}

Lakshmi, Jothinathan ^{[1
]}

Sozhan, Ganapathy ^{[1
]}

机构：

[1] Cent Electrochem Res Inst, CSIR, Karaikkudi 630006, Tamil Nadu, India

来源：

CLEAN-SOIL AIR WATER | 2010年 / 38卷 / 5-6期

关键词：

Adsorption kinetics; Arsenate removal; Electrochemical coagulation; Isotherms; AQUEOUS-SOLUTIONS; DRINKING-WATER; WASTE-WATER; BASIC DYE; ADSORPTION; ARSENIC(V); ELECTROCOAGULATION; KINETICS; IRON; CHROMIUM(VI);

D O I：

10.1002/clen.201000001

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The removal of arsenate from aqueous solution was carried out by electrochemical coagulation using aluminum alloy as anode and stainless steel as cathode. Various operating parameters on the removal efficiency of arsenate were investigated, such as initial arsenate ion concentration, initial pH, current density, and temperature. Effect of coexisting anions such as silicate, fluoride, phosphate, and carbonate were studied on the removal efficiency of arsenate. The optimum removal efficiency of 98.4% was achieved at a current density of 0.2 A/dm(2) at a pH of 7.0. The experimental data were tested against different adsorption isotherm models for describing the electrochemical coagulation process. The adsorption of arsenate preferably fitting the Langmuir adsorption isotherm suggests monolayer coverage of adsorbed molecules. First and second order rate equations were applied to study adsorption kinetics. The adsorption process follows second order kinetics model with good correlation. Temperature studies showed that adsorption was endothermic and spontaneous in nature.

引用

页码：506 / 515

页数：10

共 44 条

[1] Decolourization and removal of phenolic compounds from olive mill wastewater by electrocoagulation [J].

Adhoum, N ;

Monser, L .

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2004, 43 (10) :1281-1287

[2] INTRAPARTICLE DIFFUSION OF A BASIC DYE DURING ADSORPTION ONTO SPHAGNUM PEAT [J].

ALLEN, SJ ;

MCKAY, G ;

KHADER, KYH .

ENVIRONMENTAL POLLUTION, 1989, 56 (01) :39-50

[3] Arsenic adsorption from aqueous solutions by activated red mud [J].

Altundogan, HS ;

Altundogan, S ;

Tümen, F ;

Bildik, M .

WASTE MANAGEMENT, 2002, 22 (03) :357-363

[4] Retention of arsenic on hydrous ferric oxides generated by electrochemical peroxidation [J].

Arienzo, M ;

Adamo, P ;

Chiarenzelli, J ;

Bianco, MR ;

De Martino, A .

CHEMOSPHERE, 2002, 48 (10) :1009-1018

[5] Arsenic removal through electrocoagulation: Kinetic and statistical modeling [J].

Balasubramanian, N. ;

Kojima, Toshinori ;

Srinivasakannan, C. .

CHEMICAL ENGINEERING JOURNAL, 2009, 155 (1-2) :76-82

[6] Chemical reactions between arsenic and zero-valent iron in water [J].

Bang, S ;

Johnson, MD ;

Korfiatis, GP ;

Meng, XG .

WATER RESEARCH, 2005, 39 (05) :763-770

[7] Electrochemical technologies in wastewater treatment [J].

Chen, GH .

SEPARATION AND PURIFICATION TECHNOLOGY, 2004, 38 (01) :11-41

[8] Investigation on the electrolysis voltage of electrocoagulation [J].

Chen, XM ;

Chen, GH ;

Yue, PL .

CHEMICAL ENGINEERING SCIENCE, 2002, 57 (13) :2449-2455

[9] Adsorption of arsenic(V) by activated carbon prepared from oat hulls [J].

Chuang, CL ;

Fan, M ;

Xu, M ;

Brown, RC ;

Sung, S ;

Saha, B ;

Huang, CP .

CHEMOSPHERE, 2005, 61 (04) :478-483

[10] Adsorption of chromium(VI) from aqueous solution by activated carbon derived from olive bagasse and applicability of different adsorption models [J].

Demiral, Hakan ;

Demiral, Ilknur ;

Tumsek, Fatma ;

Karabacakoglu, Belgin .

CHEMICAL ENGINEERING JOURNAL, 2008, 144 (02) :188-196

← 1 2 3 4 5 →