|Table of Contents|

Study on Passivation of Heavy Metals Cd in Municipal Sludge and Effects on Greenhouse Vegetable and Soil

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2021年23
Page:
1-6
Research Field:
Publishing date:

Info

Title:
Study on Passivation of Heavy Metals Cd in Municipal Sludge and Effects on Greenhouse Vegetable and Soil
Author(s):
LIU Jing1;  MA Maoting1;  KANG Lingyun1;  ZHAO Huiwei;  DU Lianfeng1;  LI Shunjiang1
(1.Institute of Plant Nutrition and Resources， BZIjing Academy of Agriculture and Forestry Sciences， BZIjing 100097， China; 2.The semi-arid Agriculture Engineering &Technology Research Center of P. R. China, Shijiazhuang, Shijiazhuang 050051, China）
Keywords:
sludge fertilizer;  vegetable cultivation;  passivator;  coal fly ash;  heavy metal Cd
PACS:
-
DOI:
10.11937/bfyy.20212564
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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Last Update: 2021-10-26