Simulated Leaching Research on the Effects of Sewage Sludge on Nutrients and Heavy Metals in Aeolian Sandy Soil

• 作者: HUI Xiu-juan TANG Feng-de XUE Shuang ZOU Tong
• 来源期刊: 气象与环境研究：英文版
• 学科: 农学
• 关键词: 城市污水污泥 土壤养分 模拟分析 浸出试验 风沙土 重金属 污水处理厂 古尔班通古特沙漠
• 年，卷（期）: 2012,（10）
• 页码范围: 52-55
• 页数: 4页
• 分类号: S158.3

摘要

[Objective] The study aims at discussing the feasibility of urban sewage sludge applied to desertification forestland. [Method] Through the simulated leaching test, the effects of sewage sludge application on the content of nutrients and heavy metals in aeolian sandy soil were analyzed. [Result] After the simulated leaching with sewage sludge, the contents of total nitrogen (TN), total phosphorus (TP), available nitrogen (AN) and available phosphorus (AP) in each layer of aeolian sandy soil increased significantly, and the increase in 0-20 cm soil was more significant than that in 20-40 and 40-60 cm soil. Meanwhile, the content of each heavy metal in 0-20 cm soil rose significantly, while the increase was small in 40-60 cm soil. In addition, after the application of sewage sludge, the Nemrow Index of aeolian sandy soil was 0.67, lower than the national soil quality standard of forestland (0.70), and the short-time application of sewage sludge to sandy soil did not cause serious pollution. However, if sewage sludge has been applied to aeolian sandy soil for a long term, the potential hazard of heavy metals (especially Cd) caused by lone-term accumulation should be paid more attention to.