巢湖地区不同风化程度岩石岩源磷赋存形态研究.PDFVIP

中国环境科学 2012,32(10) ：1820~1825 China Environmental Science 巢湖地区不同风化程度岩石岩源磷赋存形态研究 * 张 玲,汪家权 ,马玉萍,陈 锐,任爱华 (合肥工业大学资源与环境工程学院,安徽 合肥 230009) 摘要：对巢湖地区 6 组不同风化程度的岩石进行磷素形态连续提取,这 6 组岩石包括殷坑组、龙潭组、灯影组青灰段、灯影组紫褐段、孤 峰组及双山组的微风化、弱风化和强风化岩石,研究岩源磷磷素在风化作用下的转化规律.结果表明,随风化过程进行,6 组岩石中总磷含量 均降低,其中多数组别岩石中易溶性和弱吸附性磷(Ex-P) 、铝结合磷(Al-P) 、闭蓄态磷(De-P) 、自生和生物磷灰石碳酸钙结合磷(Ca-P)和 碎屑磷灰石及其他无机磷(Oc-P)呈下降趋势,而铁结合磷(Fe-P)及有机磷(Or-P)则呈上升趋势;大部分岩石磷素的主要赋存形态是碎屑磷灰 石及其他无机磷;对比 6 组岩石磷素赋存形态分布、含量及相应的 pH 值可知,岩石的酸碱度对磷素的赋存形态影响较大.巢湖地区富磷岩 层在风化过程中的磷素释放潜力大,因而岩石的风化作用是巢湖流域水体富营养化的重要因素之一. 关键词：巢湖；风化程度；磷素形态；吸附；解吸 中图分类号：X144 文献标识码：A 文章编号：1000-6923(2012)10-1820-06 * Phosphorus forms of different weathering degree rocks in Chaohu Lake area. ZHANG Ling, WANG Jia-quan , MA Yu-ping, CHEN Rui, REN Ai-hua (College of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China). China Environmental Science, 2012,32(10)：1820~1825 Abstract ：Phosphorus forms of different weathering degree rocks of yinkeng, longtan, dengying,gufeng and shuangshan six group of Chaohu Lake basin were investigated by using the method of phosphorus sequential extraction. The total phosphorus was gradually reduced in the weathering process, Ex-P、Al-P 、De-P 、Ca-P and Oc-P were decreasing and Fe-P and Or-P were increasing in mostly groups and Oc-p was the main form in the most of the rock. The pH value was the most important influence factor of phosphorus forms compared with phosphorus forms distribution, content and the pH value in the six group samples. Weathering was one of the important factors of eutrophication of Chaohu Lake basin. Key words ：Chaohu Lake ；weathering degree ；phosphorus forms ；adsorption ；desorption 磷素是巢湖水体富营养化的限制性因子 质条件对巢湖水体富营养化的影响方面研究较 一,巢湖地区地处富磷地质区,天然磷的背景值很 少.在岩源磷磷素释放