%0 Journal Article
%T Enrichment characteristics of phosphorus on micro-aggregates in different sizes of sandy soil<br>沙土不同粒径微团聚体对磷的富集特征
%A WANG Erli
%A WANG Siqi
%A XU Ying
%A <br>王而力
%A 王嗣淇
%A 徐颖
%J 环境科学学报
%D 2013
%I 
%X Loss of soil and water were significant carriers of pollutant. In order to estimate loss flux of phosphorus in adsorption state, enrichment characteristic of phosphorus on micro-aggregate in different sizes of sandy soil was investigated by batch experiments of equilibrium adsorption. Results indicated that enrichment ratio of clay (3.79) was higher than that of silt (2.98). The enrichment effect of phosphorus on micro-aggregates of sandy soil was relatively strong, which may be due to three reasons. Firstly, organic matter content of fine grain size aggregates was higher than that of coarse grain size aggregates. Secondly, organic matter of fine grain size aggregates was enriched by forming complex with clay mineral, and a sorption mode with pore filling existed in the complex structures. Thirdly, the content of Fe/Al-bound complex in clay or silt was relatively higher and played an important role in phosphorus sorption on sandy soil. Apart from micro-hole filling, the sorption mechanism of phosphorus can be also through hydration oxide coordination. There were significantly positive correlations between adsorption partition coefficient, enrichment ratio and total organic matter content, with the correlation coefficient of 0.854 and 0.954, respectively. The mass percentages of adsorption-state phosphorus carried by clay and silt from sandy soil in the Xiliao River under heavy rainfall condition were estimated as 1269.15 mg·kg-1 and 997.53 mg·kg-1 respectively,and the enrichment ratio of clay and silt were estimated as 3.79 and 2.98 respectively.
%K sandy soil
%K aggregates
%K phosphorus
%K partition coefficient
%K enrichment ratio<br>沙土
%K 微团聚体
%K 磷
%K 吸附分配系数
%K 富集系数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=523711B464E4FFDF5C64FE22ABC40FFD&yid=FF7AA908D58E97FA&vid=27746BCEEE58E9DC&iid=38B194292C032A66&sid=AC3946AB81989513&eid=849A5A9D85EBE6D4&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=0&reference_num=46