Studies on the treatment of toxic phenols wastewater in coke plant with fly ash treated by acid
Received date: 1999-10-01
Online published: 2010-10-01
A coal fly ash-based coagulant combining the capabilities of both physical adsorption and chemical coagulation has been prepared treated by adding a small amount of pyrite slag and an appropriate amount of NaCl to coal fly ash in coal-fired thermal power plants and then the resulting mixture being stirred and extracted with dilute H2SO4 for 2.5 h at 100 ℃. This coagulant thus was used to treat toxic phenols wastewater in coke plant, the removing rate of SS, COD, color and phenols was 95%, 86%, 96% and 92% respectively, a higher rate of settlement, a smaller volume of sludge, and a lower cost of treatment. The coagulation mechanism of fly ash coagulant in the treatment of toxic phenols wastewater in coke plant has been studied.
XIA Changbin, HE Xiangzhu, LI Deliang . Studies on the treatment of toxic phenols wastewater in coke plant with fly ash treated by acid[J]. Industrial Water Treatment, 2000 , 20(4) : 20 -21,24 . DOI: 10.11894/1005-829x.2000.20(4).20
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