Sustainable stabilization/solidification of municipal solid waste incinerator fly ash by incorporation of green materials

Chen, Liang1; Wang, Lei1,2; Cho, Dong-Wan1,3; Tsang, Daniel C. W.1; Tong, Lizhi4; Zhou, Yaoyu1,5; Yang, Jian6; Hu, Qing4; Poon, Chi Sun1

2019-06-10

10.1016/j.jclepro.2019.03.057

Journal of Cleaner Production   影响因子和分区

0959-6526

1879-1786

Municipal solid waste incinerator fly ash (IFA) is categorized as a hazardous waste, which requires proper treatment prior to landfilling due to its high concentrations of toxic elements. This study developed an innovative and cleaner method for stabilization/solidification (S/S) of IFA by the incorporation of supplementary cementitious materials (SCMs) and green stabilizers. Quantitative X-ray diffraction and thermogravimetric analyses indicated that toxic elements in IFA inhibited the cement hydration. Therefore, the single use of cement (10 wt%) was not efficient for the immobilization of toxic elements, especially for Pb. The incorporation of SCMs (20 wt% of binder) such as silica fume facilitated the formation of additional cement hydrates and reduced Pb leachability by 36.3%. The addition of green stabilizers such as potassium dihydrogen phosphate (KDP) and wood waste-derived biochar also improved the immobilization of toxic elements. KDP directly combined with Pb2+ to form a precipitate of Pb-3(PO4)(2), whereas biochar promoted the generation of cement hydrates for S/S via the effect of internal curing. The incorporation of silica fume (40 wt%) in the binder was the most effective. Overall, this study demonstrated that the selected green binders can serve as low-carbon and high-efficient material for S/S of hazardous ash residue such as IFA. (C) 2019 Elsevier Ltd. All rights reserved.

Hazardous waste treatment Green/sustainable remediation Metal/metalloid leachability Waste valorization/recycling Wood waste biochar Incinerator ash

SCI ; EI

英语

ESI高被引

其他

Hong Kong Research Grants Council[E-PolyU503/17]

Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology

Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences

WOS:000466249500029

ELSEVIER SCI LTD

20191306690158

Binders ; Biohazards ; Cements ; Fly ash ; Hazardous materials ; Hydrates ; Hydration ; Lead compounds ; Potassium compounds ; Refuse incinerators ; Silica fume ; Stabilization ; Thermogravimetric analysis ; Waste incineration ; Waste treatment

Cement:412.1 ; Municipal and Industrial Wastes; Waste Treatment and Disposal:452 ; Industrial Wastes Treatment and Disposal:452.4 ; Chemistry:801 ; Chemical Agents and Basic Industrial Chemicals:803 ; Accidents and Accident Prevention:914.1

Web of Science

1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Horn, Kowloon, Hong Kong, Peoples R China
2.Univ Sheffield, Dept Mat Sci & Engn, Sir Robert Hadfield Bldg,Mappin St, Sheffield S1 3JD, S Yorkshire, England
3.Korea Inst Geosci & Mineral Resources, Geol Environm Div, Gwahak Ro 124, Daejeon 34132, South Korea
4.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
5.Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China
6.Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, State Key Lab Ocean Engn, Shanghai, Peoples R China

Chen, Liang,Wang, Lei,Cho, Dong-Wan,et al. Sustainable stabilization/solidification of municipal solid waste incinerator fly ash by incorporation of green materials[J]. Journal of Cleaner Production,2019,222:335-343.

Chen, Liang.,Wang, Lei.,Cho, Dong-Wan.,Tsang, Daniel C. W..,Tong, Lizhi.,...&Poon, Chi Sun.(2019).Sustainable stabilization/solidification of municipal solid waste incinerator fly ash by incorporation of green materials.Journal of Cleaner Production,222,335-343.

Chen, Liang,et al."Sustainable stabilization/solidification of municipal solid waste incinerator fly ash by incorporation of green materials".Journal of Cleaner Production 222(2019):335-343.