%0 Journal Article
%T Study on Phosphorus Adsorption Characteristic of Sediments in an Ecological Ditch<br>生态沟渠底泥属性与磷吸附特性研究
%A ZHANG Shu-nan
%A JIA Zhao-yue
%A XIAO Run-lin
%A YANG Feng-fei
%A YU Hong-bing
%A LIU Feng
%A WU Jin-shui
%A <br>张树楠
%A 贾兆月
%A 肖润林
%A 杨凤飞
%A 余红兵
%A 刘锋
%A 吴金水
%J 环境科学
%D 2013
%I 
%X Sediments properties and phosphorus (P) adsorption capacities were compared among the samples of 0-5 cm and 5-15 cm layers from the ecological ditch vegetated with Cenetlla asiatica, Sparganium stoloniferum and a natural agricultural ditch with weeds. The results showed the 0-5 cm sediment vegetated with Cenetlla asiatica had higher concentrations of oxalate extracted Fe, Al and P than those vegetated with Sparganium stoloniferum or weeds. The parameters calculated from the Freudlich and Langmiur isotherms showed the equilibrium phosphate concentration (EPC0) ranged from 0.009 to 0.031 mg·L-1. Cenetlla asiatica in the 0-5 cm layer had the maximum values of 352.2 L·kg-1 and 562.7 mg·kg-1 for Freundlich adsorption constant (Kf) and Langmuir sorption maximum (Smax), respectively, which proved it had the highest P adsorption capacity. The regression analysis showed P sorption parameters had significant relationship to oxalate-extracted Fe, clay content and DPS (P<0.05). It was thus clear that aquatic plants influenced sediment properties and P adsorption capacity, and the practice of growing proper plants in ecological ditch could reduce the risk of P loss in non-point source pollution.
%K aquatic plant
%K sediment
%K ecological ditch
%K phosphorus
%K adsorption<br>水生植物
%K 底泥
%K 生态沟渠
%K 磷
%K 吸附
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9C65539B20E123FC8DEEBB26D5D6BD1A&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=38B194292C032A66&sid=C17A97755771D03C&eid=2D52C01434B71375&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=28