Abstract：
:Municipal solid wastes incineration (MSWI) flue gas was employed as the carbon source for in-situ calcium removal from MSWI leachate. Calcium removal efficiency was 95-97% with pH of 10.0-11.0 over 100min of flue gas aeration, with both bound Ca and free Ca being removed effectively. The fluorescence intensity of tryptophan, protein-like and humic acid-like compounds increased after carbonation process. The decrease of bound Ca with the increase of precipitate indicated that calcium was mainly converted to calcium carbonate precipitate. It suggested that the interaction between dissolved organic matter and Ca2+ was weakened. Moreover, 10-16% of chemical oxygen demand removal and the decrease of ultraviolet absorption at 254nm indicated that some organics, especially aromatic compound decreased via adsorption onto the surface of calcium carbonate. The results indicate that introduce of waste incineration flue gas could be a feasible way for calcium removal from leachate.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang C,Zhu X,Wu L,Li Q,Liu J,Qian Gdoi
10.1016/j.biortech.2017.03.048subject
Has Abstractpub_date
2017-09-01 00:00:00pages
165-170eissn
0960-8524issn
1873-2976pii
S0960-8524(17)30318-8journal_volume
240pub_type
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