生物有机肥国家标准-蚯蚓对轻金属活性,生物顶用和浸出性的感应

作者:佚名    微信文章来源:本站原创    法定人数:    更新时间:2019-6-5

Heavy metal availability, bioaccessibility, and leachability in contaminated soil: effects of pig manure and earthworms

李志安,庄萍(通讯作者)等


Abstract

A pot experiment and a leaching experiment were conducted to investigate the effects of earthworms and pig manure on heavy metals (Cd, Pb, and Zn) immobility, in vitro bioaccessibility and leachability under simulated acid rain (SAR). Results showed manure significantly increased soil organic carbon (SOC), dissolved organic carbon (DOC), available phosphorus (AP), total N, total P and pH, and decreased CaCl2-extractable metals and total heavy metals in water and SAR leachate. The addition of earthworms significantly increased AP (from 0.38 to 1.7 mg kg−1), and a downward trend in CaCl2-extractable and total leaching loss of heavy metals were observed. The combined earthworm and manure treatment decreased CaCl2-extractable Zn, Cd, and Pb. For Na4P2O7-extractable metals, Cd and Pb were decreased with increasing manure application rate. Application of earthworm alone did not contribute to the remediation of heavy metal polluted soils. Considering the effects on heavy metal immobilization and cost, the application of 6% manure was an alternative approach for treating contaminated soils. These findings provide valuable information for risk management during immobilization of heavy metals in contaminated soils.

 

Keywords Metal availability . Leachability . Bioaccessibility . Pigmanure compost . Earthworm . Simulated acid rain


全文录入:/UploadFiles/file/202006/2020060514591276.pdf

 

微信文章录入:anny    责任编辑:anny 

精彩图片
微信文章评论
中国统计网载入中,请稍后。
  请您在心:
 ·请遵守中华人民国歌阿富汗伊斯兰共和国有关政策法规和《居委会至于维护互联网络一路平安的决定》。
 ·请在心c语言视频教程文明,尊重网络道德观察,并承担一切因您的行为而直白或间接引起的法律责任包括什么。
 ·w88客户端-手机登录微信文章跟帖系统管理员培训有权封存或除去其管辖留言中的任意情节。
 ·您在w88客户端-手机登录揭示的言论,w88客户端-手机登录有权在网站内转载或引用。
 ·揭示本评论即表明您已经阅览并接受上述合同条款,如您对管理有意见请向微信文章跟帖系统管理员培训层报。

绿色进行时
推荐微信文章
植物生长ph调节剂强化籽粒苋修复镉…
Exogenous plant growth regulators improved phytoextract…
绿色生活
驴行天下
考试频道点击排行
  • 完了考试

  • | 设为首页 | 进入收藏 | 至于我们 | 广告服务 | 联系站长 | 阿里微微 | 版权申明 | 管理记名 | 

    Baidu