山地城市生物滞留设施磷素富集与形态特征  

Phosphorus Enrichment and Morphological Characteristics of Bioretention Facilities in Mountainous Cities

作　　者：季晓晖 何勇 魏小兵 魏泽军 牛佳伟 JI Xiaohui;HE Yong;WEI Xiaobing;WEI Zejun;NIU Jiawei(Guiyang CECEP Water Co.Ltd.,Guiyang 550001,China;Ecological Environment Monitoring Station of Hechuan District,Chongqing 401520,China;Chongqing Lanjie Environmental Technology Co.,Ltd.,Chongqing 402465,China;Chongqing Academy of Science and Technology,Chongqing 401120,China)

机构地区：[1]贵阳中节能水务有限公司,贵州贵阳550001 [2]重庆市合川区生态环境监测站,重庆401520 [3]重庆蓝洁环境技术有限公司,重庆402465 [4]重庆市科学技术研究院,重庆401120

出　　处：《环境影响评价》2024年第3期74-77,共4页Environmental Impact Assessment

基　　金：重庆市基本科研业务费项目“典型生物滞留设施对重金属污染物的去除效果研究”(cast2022jbky40026)。

摘　　要：生物滞留设施是城市生态系统中重要的雨水管理设施,因其对雨水径流中污染物的净化作用而在全国海绵城市建设中普遍应用,以建成时间大于5年的生物滞留设施为对象,通过现场取样、检测、分析等方法,重点关注了生物滞留设施中磷污染物的富集与形态,以掌握其积累分布、形态转化。结果表明,生物滞留带总磷素在0.36~0.76 g/kg之间,城市不同用地类型道路生物滞留带污染物含量相差较大,在建区域和城市交通道路生物滞留带中磷污染物主要富集在土壤深度为0~10 cm的表层处,含量分别为0.81 g/kg和0.49 g/kg。在建区域、居住区、商业区道路磷素积累显著高于城市交通道路,磷素纵向分布主要在生物滞留带0~10 cm深度富集;在生物滞留设施内部形态以钙磷(Ca-P)与有机磷形态为主;其形态转化路径则是以有机磷向无机磷,特别是交换态磷转化,不同区域内的磷素具有相似的富集、转化规律。Biodetention facilities are important rainwater management facilities in urban ecosystems,widely used in sponge city construction nationwide due to their purification effect on pollutants in rainwater runoff.Biodetention facilities with a construction time of more than 5 years were taken as objects.The enrichment and morphology of phosphorus pollutants in bioretention facilities were analyzed by means of on-site sampling,detection and analysis,so as to grasp their accumulation,distribution and morphological transformation.The results showed that the total phosphorus in the biological retention zone ranged from 0.36 g∕kg to 0.76 g∕kg.The pollutant content in the biological retention zone on different types of urban roads varied greatly.Phosphorus pollutants in the under-construction area and urban traffic road biological retention zone were mainly enriched in the surface layer of soil depth of 0~10 cm,with concentrations of 0.81 g∕kg and 0.49 g∕kg,respectively.The accumulation of phosphorus on roads in construction areas,residential areas,and commercial areas was significantly higher than on urban transportation roads,and the vertical distribution of phosphorus was mainly enriched at depths of 0~10 cm in the bioretention facilities.The phosphorus forms were mainly in the form of calcium phosphorus(Ca-P)and organic phosphorus within biological retention facilities.The transformation pathway of its form was from organic phosphorus to inorganic phosphorus,especially the transformation of exchangeable phosphorus,and phosphorus in different regions has similar enrichment and transformation patterns.

关 键 词：生物滞留设施 磷污染物 分布特征 

分 类 号：X832[环境科学与工程—环境工程]