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author:

Chen Chunyun (Chen Chunyun.) [1] | Zhuang Yuanyi (Zhuang Yuanyi.) [2]

Indexed by:

CPCI-S

Abstract:

This paper presents results of chemical activation of sewage sludge, a waste material generated in sewage treatment processes, to produce an adsorbent for Direct Fast Brown M removal. Dewatered sewage sludge samples were 'subjedted to chemical treatment by zinc chloride at various molar concentrations and were then pyrolyzed in inert gas atmosphere at various temperatures for different hold times. Scanning electron microscope image photographs, element composition, and pore structure were analyzed for the sludge adsorbent characteristics. In this study, it was shown that pyrolysis temperature and activation chemicals used significantly affect the surface area development and pore structure evolution. Solution molar concentration of the activating agent is a particularly important factor. The optimal conditions for a larger surface area adsorbent were 4 M ZnCl2-immersed sludge pyrolyzed at 550 degrees C for 60 m,in, the highest. BET surface area and micropore area achieves 174 in m(2/)g, and 95 in m(2)/g, respectively. The experiment to adsorb the Direct Fast Brown M waste water was carried out. It is noteworthy to point out that more than 80% reduction in COD value has occurred for wastewater sample. Experimental results show clearly that the sludge derived adsorbent is capable of removing Direct Fast Brown M by adsorption, its capacity is about 71% that of the GAC, the maximum adsorption capacity is 500 mg/g. Experimental results demonstrate that sewage sludge, a waste material in abundant supply, is a viable source of activated adsorbents.

Keyword:

adsorbent adsorption capacity chemical activation dye removal sewage sludge

Community:

  • [ 1 ] [Chen Chunyun]Fuzhou Univ, Coll Environm & Resources, Fuzhou 350002, Peoples R China

Reprint 's Address:

  • 陈春云

    [Chen Chunyun]Fuzhou Univ, Coll Environm & Resources, Fuzhou 350002, Peoples R China

Email:

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Source :

ADVANCES IN CHEMICAL TECHNOLOGIES FOR WATER AND WASTEWATER TREATMENT

Year: 2008

Page: 717-725

Language: English

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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