Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 339, Issue -, Pages 191-199Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.06.008
Keywords
Fly ash; Dioxin; Elements; Washing; Ball-milling
Categories
Funding
- Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization
- Guangdong provincial environmental protection special fund research projects [[2015]318]
- Foshan science and technology plan projects [2015AB004322]
- Hunan Collaborative Innovation Center of Chemical Engineering & Technology with Environmental Benignity and Effective Resource Utilization
- South China Institute of Environmental Science, MEP (Ministry of Environmental Protection)
Ask authors/readers for more resources
In this study, samples were taken from different types of municipal waste incineration plants in the Pearl River Delta, China. Analyzing the distributive characters of elements and dioxin congeners in fly ash, the method of washing-ball milling was utilized to remove chloride and degrade dioxin in fly ash. The results showed that more than 90% of particles were in the range of 1 50 pm and most of dioxin and metals existed in 0.030 similar to 0.075 mm of particles. K, Na, Cl and Br in fly ash could be removed by washing efficiently, however dioxin and other metals remained in the solid phase. Washing and Fe/Ni-SiO2 ball milling method seemed to be the best choice as the dioxin removal rate could reach up to 93.20%. Dioxin could be degraded to low toxic compounds and heterochorides with Fe/Ni as dechlorinating agent. In the process, PCDFs were partly transformed to PCDDs, while too long time of ball-milling was not benefited for dioxin removing. In addition, the phases of calcium such as Ca(OH)(2), CaCO3 and CaSO4 in fly ash could transform from crystal to amorphous. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available