膨胀蛭石对富营养化水体中氮、磷富集效果试验研究  

Study on Effect of N and P in Eutrophic Water Absorbed by Vermiculite

作　　者：桑连海[1] 黄薇[1] 陈进[1] 黄茁[1] 唐林森[1] 

机构地区：[1]长江科学院水资源综合利用研究所,武汉430010

出　　处：《长江科学院院报》2010年第2期7-10,共4页Journal of Changjiang River Scientific Research Institute

基　　金：农业科技成果转化基金项目(2006GB23320484);中央级公益性科研院所基本科研业务费项目(YWF201004)

摘　　要：利用水上种植技术治理湖泊富营养化已被证明是一种行之有效的方法,而提高作物产量一直是阻碍该技术普及的一个难点。利用膨胀蛭石具有的强吸附性和阳离子交换能力,采用室内试验的方法,研究膨胀蛭石对富营养化水体中氮磷物质的富集效果。结果表明:当富营养化水体中的总磷和总氮浓度分别为0.5 mg/L和5 mg/L时,经过蛭石8 h的富集后,吸附基本达到平衡,水体中总磷和总氮的去除率可达78%和30%,而蛭石压滤液中总磷和总氮的浓度分别约是水体中总磷和总氮浓度的4和3倍。It is confirmed as an effective approach to manage eutrophicated lake by planting in water technology, but the popularization of the technology is difficult because of lower crop yield. By indoor experiment , the paper studied the effect of TN, TP in eutrophic water absorbed by expanded vermiculite, which has a better absorption property and cation exchange capacity. Results indicated as follows： Expanded vermiculite has a better absorption capability to TN, TP in eutrophic water; when TN and TP concentration in eutrophic water is 0.5 mg/L and 5 mg/L, absorption equilibrium is obtained basically after 8 h; the removal ratio of TN, TP in eutrophic water is 76% and 30% respectively after 32 h; however, TN and TP concentration in vermiculite leachate is four times and three times than those in eutrophic water.

关 键 词：湖泊富营养化 富集 膨胀蛭石 

分 类 号：X524[环境科学与工程—环境工程]