【作者】 吕昌伟； 王维； 何江； 孙园园； 麻涛； 张细燕； 崔萌； 万丽丽；

【Author】 Lü Chang-wei1,2,WANG Wei1,2,HE Jiang1,2,SUN Yuan-yuan1,MA Tao1,ZHANG Xi-yan1,CUI Meng1,WAN Li-li1(1.College of Environment and Resources,Inner Mongolia University,Huhhot 010021,China;2.Institute of Environmental Geology,Inner Mongolia University,Huhhot 010021,China)

【机构】 内蒙古大学环境与资源学院； 内蒙古大学环境地质研究所；

【摘要】 以乌梁素海(WLSH)和岱海(DH)表层沉积物为吸附剂,开展了磷硅在2个湖泊沉积物上的释放动力学及释放过程中的形态变化研究。结果表明,磷和硅在2个湖泊沉积物上的释放行为均可用Elovich方程描述;0~20 min为磷的快速释放阶段,此时段内约有75%的吸附磷迅速从沉积物上解吸并释放至上覆水中;0~2h为硅的快速释放阶段,此阶段内约有40%的吸附硅从沉积物上解吸并释放至上覆水中;总体上,沉积物中Ex-P、Al-P、Fe-P及IEF-Si、CF-Si具有较强的释放潜力,对揭示沉积物中磷和硅的释放机理及其生物地球化学循环规律有重要意义,可为探讨真实环境体系中营养盐的吸附/解吸机制,阐释湖泊富营养化的营养盐限制机理及营养盐耦合作用等提供理论依据和基础数据。更多还原

【Abstract】 Taking surface sediments from the Wuliangsuhai and Daihai Lake as adsorbent,the release kinetics experiments of phosphorus and silicate from sediments were carried out and the form distribution characters of phosphorus and silicate were studied after release in this work.The results showed that the release characteristics of phosphorus and silicate can be expressed by the Elovich equation.In the first 20 min,there about 75% of adsorbed phosphorus were released into the overlying water;and in the first 2 h,there about 40% of adsorbed silicate were released into the overlying water.Generally,the forms of Ex-P,Al-P,Fe-P,IEF-Si and CF-Si in the two lakes sediments had important potential bioavailability.更多还原