湖北农业科学 ›› 2020, Vol. 59 ›› Issue (12): 68-71.doi: 10.14088/j.cnki.issn0439-8114.2020.12.014

• 资源·环境 • 上一篇    下一篇

土壤钝化剂对磷石膏污染土壤中Cd的钝化修复效应

王仙慧a, 龙涛a, 张建昆a, 周春壮a, 唐运来a,b, 刘继恺a,b,c   

  1. a.生命科学与工程学院; b.核废物与环境安全国防重点实验室; c.核废物与环境安全省部共建协同创新中心,西南科技大学, 四川 绵阳 621010
  • 收稿日期:2019-08-01 发布日期:2020-08-26
  • 通讯作者: 刘继恺(1983-),女,四川成都人,副教授,博士,主要从事植物分子生物学和逆境生物学研究,(电话)18780334379(电子信箱)kateryan@163.com。
  • 作者简介:王仙慧(1997-),女,重庆忠县人,在读本科生,生物技术专业,(电话)15196278852(电子信箱)2629816131@qq.com
  • 基金资助:
    绵阳市科技计划项目(16S-02-5); 西南科技大学大学生创新创业训练项目 (S201910619065)

Remediation effect of different passivation agents on cadmium in phosphogypsum contaminated soil

WANG Xian-huia, LONG Taoa, ZHANG Jian-kuna, ZHOU Chun-zhuanga, TANG Yun-laia,b, LIU Ji-kaia,b,c   

  1. a. School of Life Science and Engineering; b.Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory; c.National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010,Sichuan,China
  • Received:2019-08-01 Published:2020-08-26

摘要: 为了解钝化剂对磷石膏污染土壤的钝化修复效应,采用盆栽试验,研究施加不同组合钝化剂[废铁屑(I,I1、I5分别表示含量为1%、5%)、粉煤灰(F,F1、F5分别表示含量为1%、5%)和过磷酸钙(S,S1、S5分别表示含量为1%、5%)]对磷石膏污染土壤中Cd的钝化效果以及对玉米幼苗生长和Cd含量的影响。结果表明,除了I5+F1+S1和I5+F5两种处理对玉米幼苗生长有抑制作用外,其他处理对玉米幼苗的生长影响不显著。各处理均能提高磷石膏污染土壤电导率,此外,I1+F5、I5+F1+S1和I5+F5这3种处理可显著提高磷石膏污染土壤pH。各处理均可降低磷石膏污染土壤有效态Cd含量,I5+S5、I5+F1+S1和I5+F5这3种处理的降幅最大,分别为39.13%、45.65%和41.30%。各处理均可降低玉米幼苗地上部分Cd含量,I5+S5、I5+F1+S1和I5+F5这3种处理与对照相比具有显著性差异,降幅分别为29.47%、21.95%和31.71%。各处理均能有效降低磷石膏污染土壤中Cd的活性,其中I5+S5处理在不影响玉米幼苗生长的同时,还能减少其对Cd的吸收。

关键词: 磷石膏, 玉米幼苗, 钝化修复, Cd

Abstract: In order to understand the remediation effect of passivation agents on the phosphogypsum contaminated soil, a pot experiment was carried out to investigate the effect of different combinations of passivation agents [iron scraps(I,I1 and I5 represents 1% and 5% respectively), flyash(F,F1 and F5 represents 1% and 5% respectively) and superphosphate(S,S1 and S5 represents 1% and 5% respectively)]on remediation of cadmium in phosphogypsum contaminated soil, and on the growth as well as the cadmium accumulation of maize seedlings. The results showed that except for I5+F1+S1 and I5+F5 treatments, which could inhibit the plant height and dry weight of up-ground parts of maize seedlings, other treatments had no significant effect on the growth of maize seedlings. All treatments tested could increase the electrical conductivity of phosphogypsum contaminated soil, besides, I1+F5, I5+F1+S1 and I5+F5 treatments could also dramatically increase the soil pH. All treatments could decrease the available cadmium concentrations in soil. I5+S5, I5+F1+S1 and I5+F5 treatments had the biggest drop compared with CK, which were 39.13%、45.65% and 41.30%, respectively. All treatments could decrease the cadmium concentration of up-ground parts of maize seedlings. Compared with CK, the cadmium concentration of up-ground parts of I5+S5, I5+F1+S1 and I5+F5 treated maize seedlings decreased by 29.47%, 21.95% and 31.71%, respectively. All treatments could effectively reduce the activity of cadmium in phosphogypsum contaminated soil. In addition, I5+S5 treatment could significantly decrease the cadmium accumulation of maize seedlings without effecting their growth.

Key words: phospogypsum, maize seedling, immobilization remediation, cadmium

中图分类号: