LIU Jing,MA Maoting,KANG Lingyun,et al.Study on Passivation of Heavy Metals Cd in Municipal Sludge and Effects on Greenhouse Vegetable and Soil[J].Northern Horticulture,2021,(23):1-6.[doi:10.11937/bfyy.20212564]
污泥重金属Cd钝化及在设施蔬菜上的应用效果
- Title:
- Study on Passivation of Heavy Metals Cd in Municipal Sludge and Effects on Greenhouse Vegetable and Soil
- 文献标志码:
- A
- 摘要:
- 采用培养方法研究了多种钝化剂对城市生活污泥中重金属镉（Cd）的钝化特征，筛选出优势钝化剂；通过盆栽试验探究添加优势钝化剂的污泥对农作物及土壤环境的影响，明确最佳污泥施用量。结果表明：粉煤灰能显著降低城市生活污泥中有效态Cd含量。施用污泥能够显著增加蔬菜产量、提高土壤含水量、pH和有机质含量，降低土壤硝态氮含量，同时也增加了土壤和植株Cd浓度，提高了污染风险；但是污泥和粉煤灰的配施可有效降低土壤中有效态Cd和植株可食用部分Cd含量。综合分析，添加粉煤灰的4%污泥处理对于增加蔬菜产量和品质、降低土壤中有效态Cd含量以及蔬菜可食用部分Cd含量效果最佳。
- Abstract:
- The passivation effects of six passivators on heavy metal cadmium (Cd) I n municipal sewage sludge fertilizer were studied by cultivation method, and the dominant passivators were selected. The effects of sludge fertilizer adding dominant passivators on greenhouse vegetables and soil environment were investigated through pot experiment, and the optimal application amount of sludge fertilizer was determined. The results showed that coal fly ash can significantly reduce the content of available Cd in municipal sewage sludge fertilizer. Application of sludge fertilizer can significantly increase vegetable yield, improve soil water content, pH and organic matter content, and reduce soil nitrate nitrogen content, but rise Cd concentration in soil and plants. Significantly, the combined application of sludge fertilizer and Fly ash passivator can effectively reduce the content of available Cd in soil and edible part of plant, especially with the combined application of 4% sludge fertilizer and coal fly ash, which had the best effects on increasing vegetable yield and quality, reducing the risk of Cd pollution in soil and vegetables.
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LIU Jing,MA Maoting,KANG Lingyun,et al.Passivation of Heavy Metals Cd in Municipal Sludge and Effects on Greenhouse Vegetable and Soil[J].Northern Horticulture,2021,(23):77.[doi:10.11937/bfyy.20212564]
备注/Memo
基金项目：“十三五”重点研发计划项目（2017YFD0801401）、京津冀协同创新共同体建设专项（19244010D）、北京市农林科学院植物营养与资源研究所科技能力提升专项（YZS201904、YZS202007）、北京市农林科学院青年基金项目（QNJJ201809）资助。第一作者简介：刘静（1979-），女，博士研究生，助理研究员，农田土壤修复。E-mail：liujing9712@163.com责任作者：李顺江（1976-），男，博士研究生，副研究员，农田土壤修复。E-mail：shunjiangli@163.com收稿日期：2021-06-18