• 关键词：城市污泥  农用  玉米  重金属

• 基金项目：中央级公益性科研院所基本科研业务专项(No.PM-zx021-201211-124);国家科技支撑计划项目(No.2007BAD89B14)

• 丘锦荣
• 1. 环境保护部华南环境科学研究所, 广州 510655;
  2. 华南农业大学资源环境学院, 广州 510642

• 易皓
• 环境保护部华南环境科学研究所, 广州 510655

• 刘清云
• 环境保护部华南环境科学研究所, 广州 510655

• 卢文洲
• 环境保护部华南环境科学研究所, 广州 510655

• 李基怀
• 环境保护部华南环境科学研究所, 广州 510655

• 许振成
• 环境保护部华南环境科学研究所, 广州 510655

• 吴启堂
• 华南农业大学资源环境学院, 广州 510642

• 摘要：寻求城市污泥安全农用的方法是当前城市污泥处理处置的重要研究课题之一.采用小区试验,研究了8个玉米品种对新鲜城市污泥处理效果.结果表明:所选择的8个玉米品种均可以在污泥上生长,大丰5品种对锌的累积量最低,04杂1品种对镉累积量最低,会单4品种对铜和铅累积量最低;玉米种植可显著降低城市污泥中的含水率,比不种玉米的对照处理(69.43%)水分去除率提高9.05%~17.50%,有利于城市污泥的干化及后续利用;各玉米品种植株中的总养分(氮+五氧化二磷+氧化钾)均高于有机肥标准(NY525—2012)的总养分要求,而重金属镉和铅的质量浓度除赛田3品种外其他品种均低于农用有机肥标准(NY525—2012)的限量值;玉米种植后城市污泥中的总养分和锌、镉、铜、铅4种重金属质量浓度变化很小.可见,利用玉米处理新鲜的城市污泥既可降低城市污泥中的水分,又可以产生一定量优质的有机肥原料,为城市污泥的资源化利用提供新思路.

• Abstract：Exploring security methods for agricultural application of municipal sewage sludge (MSS) is an important research subject for the treatment and disposal of MSS. In this study, a pilot experiment was conducted and eight cultivars of maize (Zea mays) were planted on the fresh MSS directly. The results showed that all cultivars could grow normally on fresh MSS. The lowest accumulation of Zn and Cd was by cultivars Dafeng5 and 04Za1, respectively, while that of Cu and Pb was by cultivar Huidan4. Planting maize could reduce significantly the rate of water content of MSS. The loss of water content in the treatments with plants was higher by 9.05%~17.50% than the control (without plant), which was beneficial to drying and stabilization of MSS. The total nutrient (nitrogen + P₂O₅+ K₂O) in maize plants were higher than those required for organic fertilizer (NY525—2012). The concentrations of Cd and Pb in maize were below the lowest concentration limit of standard of agricultural organic fertilizer (except cultivar Saitian3). At the same time, the changes of N, P, and K concentrations in MSS were very small after planting maize. All results indicated that treating fresh sewage sludge by maize could reduce water content, and produce the materials of organic fertilizer at high quality. This study provided a new way for resource use of sewage sludge.

• Key words：municipal sewage sludge  agricultural application  maize  heavy metals

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