摘要
为科学评价磷在河道沉积物中的环境行为,在模拟条件下研究了上海市进木港和苏州河沉积物中磷的分布形态、吸附特征及释放规律。结果表明:(1)2种沉积物中碎屑钙磷(De-P)浓度最高,闭蓄态磷(Oc-P)次之,其他形态磷浓度相对较低,而活性磷中以铁磷(Fe-P)为主;(2)2种沉积物对磷的吸附均符合线性方程,在4.0h时基本达到平衡;(3)沉积物中磷释放量主要来自于第1次提取;(4)温度升高促进了2种沉积物中磷的释放;(5)不同pH条件下最大磷释放量顺序为酸性>碱性>中性。
In order to scientifically evaluate the environmental behavior of phosphate in urban channel sediments,the distribution,adsorption and releasing law of phosphate in Jinmu Harbor sediment and Suzhou River sediments of Shanghai were studied.The conclusions were as follows：（1） The content of De-P and Oc-P were highest in two sediments,other species were less,and the Fe-P had most content among labile phosphate;（2） The adsorption isotherms of phosphate all accorded with linear equation in two sediments and achieved to the equilibrium after 4.0 h;（3） The total release amount of phosphate was distributed to the first extraction;（4） With the increase of temperature,total phosphate release were forwarded;（5） Acidic environment was more favorable for total phosphate release than alkaline environment,and neutral condition was least.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2011年第10期1-4,23,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.40901148、No.41003031)
国家水体污染控制与治理科技重大专项(No.2012ZX07115)
国家“973计划”项目(No.2011CB200904)
国家林业公益性行业科研专项(No.201104088)
中央高校基本科研业务费专项(No.WB0911011)
温州市重大科技专项(No.Z090921421)
关键词
河道沉积物
磷
分布
吸附
释放
channel sediment
phosphate
distribution
adsorption
release
