Simultaneous wastewater decoloration and fly ash dechlorination during the dye wastewater treatment by municipal solid waste incineration fly ash

Qiang Liu School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, P.R. China Phone: +86 (21) 66137743 Fax: +86 (21) 66137743

Yingmei Zhou School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, P.R. China Phone: +86 (21) 66137743 Fax: +86 (21) 66137743

Luquan Zou Shanghai Solid Waste Disposal Center, No. 1881 HongQiao Road, Shanghai, 200336, P.R. China

Tao Deng School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, P.R. China Phone: +86 (21) 66137743 Fax: +86 (21) 66137743

Jia Zhang School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, P.R. China Phone: +86 (21) 66137743 Fax: +86 (21) 66137743

Ying Sun School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, P.R. China Phone: +86 (21) 66137743 Fax: +86 (21) 66137743

Xiuxiu Ruan School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, P.R. China Phone: +86 (21) 66137743 Fax: +86 (21) 66137743

Ping Zhu School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, P.R. China Phone: +86 (21) 66137743 Fax: +86 (21) 66137743

Guangren Qian School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai, 200444, P.R. China Phone: +86 (21) 66137743 Fax: +86 (21) 66137743

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Abstract

In this paper, the simultaneous decolorization of dye wastewater and dechlorination of municipal solid waste incineration (MSWI) fly ash were evaluated by using MSWI fly ash as adsorbent for synthetic dye wastewater (methylene blue, MB) and real dye wastewater treatment. After mixing with dye wastewater, the chlorine content in MSWI fly ash can be reduced effectively from 10.95% ± 0.53% to 0.44% ± 0.06% (below the standard (1%) of cement substitution material in China), and the residual heavy metals in fly ash obtained from toxicity characteristic leaching procedure (TCLP) can meet the US EPA leaching standards. Simultaneously, the color and total organic carbon (TOC) in wastewater can be significantly removed due to the adsorption of dye on MSWI fly ash. MB adsorption on MSWI fly ash followed Langmuir model and the monolayer adsorption capacity of MB was estimated to be 10.20 mg/g. The results indicate that using MSWI fly ash to treat dye wastewater is a promising method which can put into effect the dechlorination of MSWI fly ash and the decolorization of dye wastewater at the same time.

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Simultaneous wastewater decoloration and fly ash dechlorination during the dye wastewater treatment by municipal solid waste incineration fly ash

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Simultaneous wastewater decoloration and fly ash dechlorination during the dye wastewater treatment by municipal solid waste incineration fly ash

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