Adsorption, kinetics and thermodynamics studies on removal of humic acid by fly ash

Liang Liang Wei; Qing Liang Zhao; Wei Qiu; Chun Mei Xie; Ting Jia; Kun Wang

Adsorption, kinetics and thermodynamics studies on removal of humic acid by fly ash

Liang Liang Wei^*
, Qing Liang Zhao
, Wei Qiu
, Chun Mei Xie
, Ting Jia
, Kun Wang

^*Corresponding author for this work

School of Environment

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Fly ash (FA) has been tested as a low-cost adsorbent of humic acid (HA) in this study. Effects of FA dosages, pH, contact time and temperature on the selectivity and sensitivity of the adsorption were investigated. The optimum conditions for HA removing were FA dosage of 10 g/L, temperature of 313 K and pH 3, respectively. Up to a 87.7% reduction of HA could be achieved in 15 min under the acidic condition (pH 3). Contrarily, the removal efficiency of HA ranged 27-35% under the neutral and alkaline conditions, and reached equilibrium slowly (120 min). Adsorption of HA onto FA followed a pseudo-second-order kinetics at pH 7, and also showed endothermic adsorption nature. Chemical characteristic of the HA before and after the FA adsorption was discussed.

Original language	English
Pages (from-to)	176-182
Number of pages	7
Journal	Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology
Volume	44
Issue number	SUPPL.2
State	Published - Mar 2012

Keywords

Adsorption
Chemical characteristic
Fly ash
Humic acid
Kinetic

Cite this

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title = "Adsorption, kinetics and thermodynamics studies on removal of humic acid by fly ash",

abstract = "Fly ash (FA) has been tested as a low-cost adsorbent of humic acid (HA) in this study. Effects of FA dosages, pH, contact time and temperature on the selectivity and sensitivity of the adsorption were investigated. The optimum conditions for HA removing were FA dosage of 10 g/L, temperature of 313 K and pH 3, respectively. Up to a 87.7\% reduction of HA could be achieved in 15 min under the acidic condition (pH 3). Contrarily, the removal efficiency of HA ranged 27-35\% under the neutral and alkaline conditions, and reached equilibrium slowly (120 min). Adsorption of HA onto FA followed a pseudo-second-order kinetics at pH 7, and also showed endothermic adsorption nature. Chemical characteristic of the HA before and after the FA adsorption was discussed.",

keywords = "Adsorption, Chemical characteristic, Fly ash, Humic acid, Kinetic",

author = "Wei, \{Liang Liang\} and Zhao, \{Qing Liang\} and Wei Qiu and Xie, \{Chun Mei\} and Ting Jia and Kun Wang",

year = "2012",

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language = "英语",

volume = "44",

pages = "176--182",

journal = "Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology",

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publisher = "Harbin Institute of Technology",

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TY - JOUR

T1 - Adsorption, kinetics and thermodynamics studies on removal of humic acid by fly ash

AU - Wei, Liang Liang

AU - Zhao, Qing Liang

AU - Qiu, Wei

AU - Xie, Chun Mei

AU - Jia, Ting

AU - Wang, Kun

PY - 2012/3

Y1 - 2012/3

N2 - Fly ash (FA) has been tested as a low-cost adsorbent of humic acid (HA) in this study. Effects of FA dosages, pH, contact time and temperature on the selectivity and sensitivity of the adsorption were investigated. The optimum conditions for HA removing were FA dosage of 10 g/L, temperature of 313 K and pH 3, respectively. Up to a 87.7% reduction of HA could be achieved in 15 min under the acidic condition (pH 3). Contrarily, the removal efficiency of HA ranged 27-35% under the neutral and alkaline conditions, and reached equilibrium slowly (120 min). Adsorption of HA onto FA followed a pseudo-second-order kinetics at pH 7, and also showed endothermic adsorption nature. Chemical characteristic of the HA before and after the FA adsorption was discussed.

AB - Fly ash (FA) has been tested as a low-cost adsorbent of humic acid (HA) in this study. Effects of FA dosages, pH, contact time and temperature on the selectivity and sensitivity of the adsorption were investigated. The optimum conditions for HA removing were FA dosage of 10 g/L, temperature of 313 K and pH 3, respectively. Up to a 87.7% reduction of HA could be achieved in 15 min under the acidic condition (pH 3). Contrarily, the removal efficiency of HA ranged 27-35% under the neutral and alkaline conditions, and reached equilibrium slowly (120 min). Adsorption of HA onto FA followed a pseudo-second-order kinetics at pH 7, and also showed endothermic adsorption nature. Chemical characteristic of the HA before and after the FA adsorption was discussed.

KW - Adsorption

KW - Chemical characteristic

KW - Fly ash

KW - Humic acid

KW - Kinetic

UR - https://www.scopus.com/pages/publications/84860290854

M3 - 文章

AN - SCOPUS:84860290854

SN - 0367-6234

VL - 44

SP - 176

EP - 182

JO - Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology

JF - Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology

IS - SUPPL.2

ER -

Adsorption, kinetics and thermodynamics studies on removal of humic acid by fly ash

Abstract

Keywords

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