延安市城市污泥农用对土壤及农作物安全性的影响  

Effect of Municipal Sluge Farming on the Safety of Soil and Crops in Yan'an

作　　者：侯雪艳 欧阳兵 高宁 殷健隆 李沅圃 张玉琦[1] Hou Xueyan;Ouyang Bing;Gao Ning;Yin Jianlong;Li Yuanpu;Zhang Yuqi(College of Chemistry and Chemical Engineering,Yan'an University,Shaanxi,716000;Yan'an Water Environmental Protection Group Water Environment Management Co.,Ltd.,Shaanxi,716000)

机构地区：[1]延安大学化学与化工学院,陕西716000 [2]延安水务环保集团水环境治理有限公司,陕西716000

出　　处：《当代化工研究》2023年第7期62-65,共4页Modern Chemical Research

摘　　要：本文将延安市污水厂城市污泥应用于玉米种植,研究其对土壤及玉米籽粒的影响。结果表明,除了As含量,污泥中其他污染物均符合《农用污泥污染物控制标准》限值。污泥施用量在0~30t/hm^(2)用于玉米种植时,玉米生长状态良好,土壤中八种重金属含量符合要求;成熟玉米籽粒中Zn含量在11.2~14.0mg/kg;污泥施用量为30t/hm^(2)时,玉米籽粒中Pd含量为0.0557mg/kg,未检出其他重金属。不同污泥施用量下估算的污泥施用年限均大于8年,在农用标准规定的最大用量7.5t/hm^(2)下最少可以施用32年,说明该污泥农用后土壤中的重金属含量对玉米种植是安全的。In this paper,the effects of sludge Yan'an sewage treatment plant on soil and corn grain were studied by applying it to corn planting.The results showed that,except for the As,all the other pollutants in the sludge were in line with the standard limit the Standard for the Control of Pollutants in Agricultural Sludge.When the application rate of sludge was 0~30 t/hm^(2),the growth of maize was good,and the content of eight heavy metals in soil met the requirements.The content of Zn in mature corn grains was 11.2~14.0 mg/kg.The content of Pd in corn grains was 0.0557 mg/kg when 30 t/hm^(2)sludge was used,and no other heavy metals were detected.The estimated application life of sludge under different application rates was more than 8 years.The minimum application life of 7.5 t/hm^(2)was 32 years,indicating that when the maximum application rate of sludge was applied to corn planting according to agricultural standards,its effect on heavy metals in soil was safe.It can be applied for at least 32 years under the maximum dosage of 7.5 t/hm^(2)stipulated in agricultural standards,indicating that the heavy metals content in the soil is safe to maize cultivation when the sludge is applied.

关 键 词：城市污泥 农用安全 玉米 土壤 

分 类 号：X[环境科学与工程]