两种覆盖材料阻隔湖泊污染底泥磷释放的研究  

Study on Two Kinds of Capping Materials Stop the Release of Phosphorus From Contaminated Sediment

作　　者：唐艳[1] 

机构地区：[1]湖北轻工职业技术学院,湖北武汉430070

出　　处：《山东化工》2015年第4期147-148,150,共3页Shandong Chemical Industry

摘　　要：本研究建立了一套模拟湖泊小试装置,分别采用含粘土的沙子和清洁黄土两种材料覆盖污染底泥阻隔磷释放。实验控制在恒温25℃厌氧条件下进行。经过60d静置和15d扰动实验,结果表明,沙子和黄土覆盖厚度达到5cm以上,均能有效抑制底泥P释放,且覆盖厚度越厚,抑制P释放的效果越好。因此,从工程成本和取材方便的角度考虑,采用5cm^15cm厚度即可。扰动会加速促进底泥P释放,采用覆盖法控制内源磷污染时,要尽量减少对覆盖材料的扰动。A lab-scale simulation lake was built to study how to control phosphorus release from contaminated sediment.Sand containing clay and clean loess were placed on the top of contaminated sediment respectively to stop phosphorus release. The temperature of lab- scale equipment was kept at 25℃. The contaminated sediments were under anaerobic conditions. The experiment quiet in there lasted for 60 days,then were disturbed for 15 days. The results show that sand and loess with the thickness of 5 cm can greatly stop phosphorus release from contaminated sediment. The effects increase with the thickness of the cover. Considering engineering cost control and taking material convenient,the optimal thickness is 5- 15 cm. Disturbance could accelerate the release of P. Therefore,using the method of capping inhibition of sediment phosphorus released,try to minimize disturb to capping materials.

关 键 词：覆盖 覆盖厚度 磷 底泥 

分 类 号：X703.1[环境科学与工程—环境工程]