环境因子对沙土覆盖底泥抑制有机磷释放的影响  

EFFECTS OF ENVIRONMENTAL FACTORS ON THE RELEASE OF ORGANIC PHOSPHORUS FROM SOIL COVERED SEDIMENTS

作　　者：辜昊 张雯 刘国[1,2] 陈春梅[1,2] 邓智瀚[1,2] 谢志豪 GU Hao;ZHANG Wen;LIU Guo;CHEN Chun-mei;DENG Zhi-han;XIE Zhi-hao(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil&Water Pollution,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]成都理工大学国家环境保护水土污染协同控制与联合修复重点实验室,成都610059

出　　处：《环境工程》2020年第5期179-184,共6页Environmental Engineering

基　　金：城市黑臭水体原位综合治理技术集成与示范(重点)(2017SZ0177)。

摘　　要：通过室内模拟试验,探究沙土覆盖后环境因子对底泥中有机磷(OP)释放与转化的影响。研究结果表明:河沙加红土的组合覆盖控制底泥OP释放的最佳应用环境条件为温度为25℃的好氧中性环境,该条件下的原位覆盖能增加底泥中OP含量,减少上覆水总磷(TP)的浓度。环境因子改变对底泥中的中等活性磷(MLOP)的转化影响最大,主要通过抑制底泥中MLOP转化,使底泥中OP含量和OP/TP比例增加。碱性磷酸酶活性(APA)与底泥中各形态磷含量的相关性研究表明,磷酸酶活性能反映底泥中OP的转化释放过程,APA与底泥中TP、OP含量呈正相关。Through the indoor simulation experiments,the effect of environmental factors on the release and conversion of OP in the sediment was studied.The results were gained as follows:the combining capping of river sand and red soil was the best way to control the release of OP in sediment;under the aerobic environment with T=25℃,the combination of sand and red soil capping can effectively control the release of organic phosphorus into the overlying water,and the content of OP in sediment increased,reducing the concentration of TP and DOP in overlying water.The environmental factors had the considerable impact on the conversion of moderately active phosphorus(MLOP)in the sediment,and the content of organic phosphorus and the ratio of OP/TP increased from inhibiting the MLOP conversion in the sediment.The correlation between alkaline phosphatase activity(APA)and various forms of phosphorus in the sediment showed that APA was positively correlated with TP and OP content in sediment,and APA could indicate the conversion process between various forms of phosphorus.

关 键 词：原位覆盖 环境因子 底泥 有机磷 释放 

分 类 号：X52[环境科学与工程—环境工程]