Study on the oxidation decoloration technology and the mechanism of the coking-plant coagulated efflux at low cost
Received date: 2005-06-22
Revised date: 2005-06-22
Online published: 2010-10-01
Aiming at the effluent water quality of the coking wastewater which is treatment by the 3-stage treatment(extraction-biochemical treatment-chemical coagulation),the decoloration technology of chemical oxidation is put forward.The effects of the concentration,pH value,temperature,time etc.of organochlorine oxidant on the decoloration have been studied.It is indicated that the technological flow should be:For the coagulation effluent water,no pH adjustment is needed and no heating is needed.A certain amount of organochlorine oxidant can be added to it directly,and the reaction time is 3 h.Afterward it is filtrated.The organic composition in the water sample is analyzed by GC-MS.The results show that after the coking wastewater is treated by the 3-stage treatment,it still consists of organisms of chromophore and auxochrome,such as 3-methyl-1,3,6-heptantriente,5-norbornene-2-carboxylic acid,2-hydroxylbenzofuran,phenol,2-chlorine-2-norbornene,1-methylsulfonyl-4-methylbenzene,3-methylbenzofuran,naphthalene-1,8-diamine and so on.They are the main reasons for forming water quality with high chromaticity.
Key words： coking wastewater; organochlorine oxidant; decoloration
Ma Qian, Mei Bin, Gu Xuexi, Ni Yaming . Study on the oxidation decoloration technology and the mechanism of the coking-plant coagulated efflux at low cost[J]. Industrial Water Treatment, 2005 , 25(9) : 27 -29,33 . DOI: 10.11894/1005-829x.2005.25(09).27
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