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        China is a large country of coking production in the world. However, about 2.85 tons of coking wastewater discharge per annum, which brings about shocking environmental pollution. It is a worldwide problem to treat coking wastewater with low-cost and high efficient. At present, the domestic coking wastewater must be treated by tertiary treatment in order to meet the standards for emission or reuse. Tertiary treatment methods include adsorption, oxidation, membrane separation, coagulation, and etc.. Coagulation is a widely-used, economic and efficient water treatment technology among them. The flagship products¨Cpolyacrylamide series of organic flocculants, their effects are favourable. However, the prices are prohibitive. Starch is an environmental friendly, rich and renewable resource. It is also a widely-used industrial chemical. In many industries, such as paper making, textile manufacturing, food processing and adhesive producting, starch is a pity found to be of cheap applications. Using starch to develop high- value-added green chemical materials is one of the main directions of the current and future research. Natural polymer-based flocculants have been acclaimed as "Green flocculants of the 21st century". They are expected to open a green way for coking wastewater treatment. According to the characteristics of coking wastewater, "tailor makes" a kind of specific flocculant is the key of this study.

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sltmac: ½ð±Ò+2 2012-06-04 09:20:05
sltmac: ½ð±Ò+25 2012-06-24 10:03:04
sltmac: ·­ÒëEPI+1 2012-06-24 10:03:13
China is a large country of coking production all over £¨1£©the world. However, about 2.85 tons of coking wastewater was discharged£¨2£© per annum, which has brought about£¨3£© the shocking environmental pollution. It is a worldwide problem of £¨4£©treating coking wastewater with low-cost and high efficient. At present, the domestic coking wastewater must be treated by the£¨5£© tertiary treatment in order to meet the standards for emission or reuse. The tertiary treatment£¨5£© methods include adsorption, oxidation, membrane separation, coagulation, and so on.Of them£¨6£©£¬coagulation is a widely-used, economic and efficient water treatment technology The flagship products¨Cpolyacrylamide series of organic flocculants have favourable effects£¨7£©whereas £¨8£©their prices are unable to afford£¨9£©.Starch is an environmental-friendly£¨10£©, rich and renewable resource,which£¨11£© is also a widely-used industrial chemical. Starch has been used£¨12£© in many industries, such as paper making, textile manufacturing, food processing and adhesive producting.It is a pity£¨13£© that starch is appllied as a cheap chemical material£¨14£©. Using starch to develop high- value-added green chemical materials is one of the main directions of the current and future researches. Natural polymer-based flocculants have been acclaimed as "Green flocculants of the 21st century". They are expected to open a green way for coking wastewater treatment. According to the characteristics of coking wastewater, this study is aimed to find out a kind of specific flocculant£¨15£©.
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