Fei Xue-ning
2007
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Journal
Journal of Tianjin Institute of Urban Construction
Abstract
Bromamine acid(1-amino-4-bromine-anthraquinone-2-sulfonic acid sodium)aqueous solution is selected as the sample in this study.The change of organic matter in freezing field was researched utilizing the separation of organic matter in bromamine acid aqueous solution by natural cold energy in winter.The results indicate that chemical oxygen demand(COD_(Cr)), total organic carbon(TOC)and chroma of the thaw water decrease first,then increase fast when the thickness of ice achieves half of the total thickness of the ice sample with the ice layer increasing.The purity of the ice increases rapidly when the seed ice isadded,also the COD_(Cr) and TOC decrease from 69.43 mg/L and 12.41 mg/L to 19.27 mg/L and 4.73 mg/L.The effect of the ratio of contact area with freezing field to the depth of solution on the ice layer purity and the ratio of ice formation is also analyzed, and the optimal ratio is 4.81 cm~2/cm.