湖北农业科学 ›› 2020, Vol. 59 ›› Issue (7): 136-141.doi: 10.14088/j.cnki.issn0439-8114.2020.07.028

• 资源·环境 • 上一篇    下一篇

矿物固化剂添加对蔬菜重金属吸收富集和污染风险的影响

苏诗博1, 徐慧婷1, 贾飞2, 陈焕元2, 张炜文1, 张杭君1, 朱维琴1   

  1. 1.杭州师范大学杭州市生态系统保护与恢复重点实验室,杭州310036;
    2.浙江省核工业二六二大队,浙江 湖州313000
  • 收稿日期:2019-09-27 发布日期:2020-06-28
  • 通讯作者: 贾飞,工程师,主要从事农业及环境地质研究,(电话)18767232059(电子信箱)512266262@qq.com;
  • 作者简介:苏诗博(1999-),女,广西北海人,在读本科生,(电话)0571-28865321(电子信箱)535482562@qq.com; 朱维琴,副教授,博士,主要从事固体废弃物资源化研究,(电子信箱)zhwq@hznu.edu.cn。
  • 基金资助:
    湖州市科技计划项目(2017GY21); 国家级大学生创新创业训练计划项目(201910346057); 杭州师范大学本科生创新创业项目; 浙江省自然科学基金项目(LY17B070004); 杭州市农业科研攻关项目(20180432B08)

Effects of mineral curing agents on absorption and enrichment of heavy metals in vegetables and pollution risk

SU Shi-bo1, XU Hui-ting1, JIA Fei, CHEN Huan-yuan2, ZHANG Wei-wen1, ZHANG Hang-jun1, ZHU WEI-qin1   

  1. 1. Hangzhou Key Laboratory of Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China;
    2. Zhejiang Provincial Nuclear Industry 262 Brigade, Huzhou 313000, Zhejiang, China
  • Received:2019-09-27 Published:2020-06-28

摘要: 以浙江省湖州市重金属污染土壤为供试土壤,施加1.0%和2.5%的沸石、膨润土、硅藻土、蛭石4种矿物固化剂,设置无添加空白(CK)和基肥添加空白(FZ)进行盆栽试验,研究矿物固化剂对蔬菜(上海青)生长、重金属含量及富集特征的影响,并对其进行重金属污染评价和健康风险评估。结果表明,矿物固化剂添加可有效促进蔬菜生长并降低其可食部位重金属含量,降低蔬菜根系及茎叶对土壤中Cu、Zn、Cd的吸收富集,其中以蛭石处理效果最佳;矿物固化剂添加处理后蔬菜重金属综合污染等级可降为轻度污染或警戒级,同时健康风险指数也有所下降,且以2.5%蛭石添加综合污染等级及健康风险最低。适量矿物固化剂添加可以促进污染土壤中的蔬菜生长并控制重金属的污染和健康风险。

关键词: 蔬菜, 重金属, 污染评价, 健康风险评估

Abstract: Taking heavy metal contaminated soil in Huzhou, Zhejiang province, as test soil, apply 1.0% and 2.5% of 4 kinds of mineral curing agents, zeolite, bentonite, diatomaceous earth and vermiculite, setting no added blank (CK) and base fertilizer added blank (FZ) for potting test, the effects of mineral curing agents on the growth, heavy metal content and enrichment characteristics of vegetables (Shanghai Green) were studied; and pollution assessment and health risk assessment of heavy metals were carried out. The results showed that the addition of mineral curing agent can effectively promote the growth of vegetables and reduce the heavy metal content in edible parts, and can reduce the absorption and accumulation of Cu, Zn, and Cd in the soil by vegetable roots and stems and leaves. After the addition of mineral curing agent, the comprehensive pollution level of heavy metals in vegetables can be reduced to mild pollution or alert level, and the health risk index has also decreased. With the addition of 2.5% vermiculite, the overall pollution level and health risk are the lowest. The addition of appropriate amount of mineral curing agent can promote the growth of vegetables in contaminated soil and control the pollution and health risks of heavy metals.

Key words: vegetable, heavy metals, pollution assessment, health risk evaluation

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