絮凝处理镉模拟污水及用于水稻栽培效应研究  

Purification of Cadmium-Containing Wastewater and Its Effects on Rice Cultivation

作　　者：邵赛[1] 赵彩凤[1] 谢洪科[1] 刘璐 郭峰[1] 李宏告[1] 吴景 张乐平[1] 肖献国 SHAO Sai;ZHAO Cai-feng;XIE Hong-ke;LIU Lu;GUO Feng;LI Hong-gao;WU Jing;ZHANG Le-ping;XIAO Xian-guo(Hunan Institute of Nuclear Agricultural Science and Space Breeding,Hunan Academy of Agricultural Sciences,Changsha 410125,PRC;Monitoring Center for the Quality of Agricultural Products in Changsha,Changsha 410003,PRC)

机构地区：[1]湖南省核农学与航天育种研究所,湖南省农业科学院,湖南长沙410125 [2]长沙市农产品质量监测中心,湖南长沙410003

出　　处：《Agricultural Science & Technology》2023年第2期1-8,共8页农业科学与技术（英文版）

基　　金：湖南省农业科技创新资金项目(2022CX96-3,2021CX39);湘财教指〔2021〕60号。

摘　　要：通过盆栽试验,研究了不同浓度镉模拟污水絮凝除镉处理后的“再生水”浇灌水稻对其生长的影响和Cd在其中的迁移分布状况。结果表明,0.1和0.5 mg/L的两种模拟污水絮凝后的清液Cd浓度≤0.01 mg/L、pH=5–8.5,达到中国农田灌溉水质标准,将其浇灌栽培水稻,所得稻谷Cd含量分别为0.07和0.13 mg/kg,达到中国食品安全国家标准(谷物镉残留≤0.2 mg/kg);抽穗期叶绿素含量、分蘖期分蘖数、稻谷产量均随着Cd浓度提高逐渐降低;同等浓度Cd模拟污水与絮凝除镉处理后的含Cd上清液浇灌水稻,对水稻生长具有同等效应;成熟后水稻根、茎和谷Cd含量依次为根>茎>谷。In this study,the effects of“reclaimed water”prepared through the flocculation treatment of the simulated cadmium-containing wastewater on the growth of rice,and the migration and distribution of Cd in rice were studied by pot experiment.The results showed that the concentration of Cd in the“reclaimed water”after flocculation treatment of the simulated wastewater with the Cd concentration of 0.1 and 0.5 mg/L was≤0.01 mg/L,pH value was 5–8.5,meeting the Standard for Irrigation Water Quality(GB 5084—2021).When irrigated,the Cd content of rice was 0.07 and 0.13 mg/kg,respectively,meeting the National Food Safety Standard.The comparison of cadmium-containing effluent and“reclaimed water”revealed that the chlorophyll content at the heading stage,the number of tillers at the tillering stage,and the yield of rice after maturity all decreased progressively with the increase of Cd concentration,whereas the effluent with the equivalent Cd concentration and“reclaimed water”had the same effect on rice growth,and the Cd content in rice was the highest in roots,followed by stems and grain.

关 键 词：镉 絮凝 “再生水” 

分 类 号：X703[环境科学与工程—环境工程] S511[农业科学—作物学]