A study on removal characteristics of heavy metals from aqueous solution by fly ash

被引:281
作者
Cho, HC [1 ]
Oh, D [1 ]
Kim, K [1 ]
机构
[1] Seoul Natl Univ, Sch Civil Urban & Geosyst Engn, Seoul 151742, South Korea
关键词
fly ash; adsorption; heavy metals; Freundlich isotherm; waste water;
D O I
10.1016/j.jhazmat.2005.07.019
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The purpose of this study was to investigate the possibility of the utilization of coal fly ash as a low cost adsorbent. Batch experiments were conducted to evaluate the removal of heavy metals from aqueous solutions by fly ash under various conditions of metal concentration, pH and fly ash dosage. The heavy metals used in this study were zinc, lead, cadmium and copper. Adsorption studies were done at various pH values (3-10) at 25 degrees C and at heavy metal concentrations of 10-400 mg/L using fly ash concentrations of 10. 20 and 40 g/L respectively. Experiments were also conducted without fly ash to determine the extent of heavy metal removal by precipitation. Kinetic experiments were also performed and the zeta-potentials of the fly ash particles were measured at various pH's. The adsorption data was described by the Freundlich adsorption model. The test results using real wastewater indicated that fly ash could be used as a cheap adsorbent for the removal of heavy metals in aqueous solutions if not strongly acidic. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:187 / 195
页数:9
相关论文
共 20 条
[1]   Heavy metal cation retention by unconventional sorbents (red muds and fly ashes) [J].
Apak, R ;
Tütem, E ;
Hügül, M ;
Hizal, J .
WATER RESEARCH, 1998, 32 (02) :430-440
[2]   Asturian fly ash as a heavy metals removal material [J].
Ayala, J ;
Blanco, F ;
Garcia, P ;
Rodriguez, P ;
Sancho, J .
FUEL, 1998, 77 (11) :1147-1154
[3]   Comparative study of adsorption properties of Turkish fly ashes II. The case of chromium (VI) and cadmium (II) [J].
Bayat, B .
JOURNAL OF HAZARDOUS MATERIALS, 2002, 95 (03) :275-290
[4]   Comparative study of adsorption properties of Turkish fly ashes I. The case of nickel(II), copper(II) and zinc(II) [J].
Bayat, B .
JOURNAL OF HAZARDOUS MATERIALS, 2002, 95 (03) :251-273
[5]  
BEAVER T, 1995, BIOCYCLE, V36, P88
[6]  
Benjamin M.M., 2002, WATER CHEM, P368
[7]   MULTIPLE-SITE ADSORPTION OF CD, CU, ZN, AND PB ON AMORPHOUS IRON OXYHYDROXIDE [J].
BENJAMIN, MM ;
LECKIE, JO .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1981, 79 (01) :209-221
[8]  
BRENDEL GF, 1995, P 11 INT S US MAN CO
[9]   SOIL ADSORPTION OF CADMIUM FROM SOLUTIONS CONTAINING ORGANIC-LIGANDS [J].
ELLIOTT, HA ;
DENNENY, CM .
JOURNAL OF ENVIRONMENTAL QUALITY, 1982, 11 (04) :658-663
[10]   REMOVAL OF CHROME DYE FROM AQUEOUS-SOLUTIONS BY MIXED ADSORBENTS - FLY-ASH AND COAL [J].
GUPTA, GS ;
PRASAD, G ;
SINGH, VN .
WATER RESEARCH, 1990, 24 (01) :45-50