[两种改良剂对修复铅、镉、砷复合污染园林土壤的效果]

[Effects of Two Amendments on Remedying Garden Soil Complexly Contaminated with Pb, Cd and As].

作者信息

Tian Tao, Lei Ming, Zhou Hang, Yang Wen-Tao, Liao Bo-Han, Hu Li-Qiong, Zeng Min

机构信息

College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.

出版信息

Huan Jing Ke Xue. 2017 Jun 8;38(6):2553-2560. doi: 10.13227/j.hjkx.201611179.

DOI:10.13227/j.hjkx.201611179

PMID:29965377

Abstract

This paper studied the effects of two amendments (iron sulfate[Fe (SO)] and calcium carbonate[CaCO]) on the bioavailability of Pb, Cd and As in a garden soil and on the migration and accumulation of Pb, Cd and As in pepper through an in-situ experiment planting pepper plants. The results indicated that:①Addition of these amendments significantly decreased TCLP extractable contents of Pb and Cd in soil, and increased TCLP extractable contents of As.②Compared with the control group, addition of Fe (SO) led to reduction in contents of Pb and Cd in pepper fruits by 7.2%-22.9% and 2.3%-2.9%, respectively, but no obvious changes were observed for As contents in pepper fruits. Meanwhile, addition of CaCO decreased the contents of Pb, Cd and As in pepper fruits by 15.8%-16.3%, 11.8%-15.0%, and 0.03%-53.2%, respectively. ③The maximum reductions for the translocation factors of Pb, Cd and As from stem to fruits in pepper plants were 16.7%, 68.0%, 10.2%, respectively, due to Fe(SO) application and 16.7%, 51.5%, 45.6%, respectively, due to CaCO application, compared with the control group. It was obvious that Fe (SO) and CaCO could both effectively decrease the migration of soil Pb, Cd and As to pepper plants, but the effects of CaCO were better than those of Fe (SO).

摘要

本文通过种植辣椒的原位实验，研究了两种改良剂（硫酸铁[Fe₂(SO₄)₃]和碳酸钙[CaCO₃]）对菜园土壤中铅、镉和砷生物有效性的影响，以及对辣椒中铅、镉和砷迁移与积累的影响。结果表明：①添加这些改良剂显著降低了土壤中TCLP可提取的铅和镉含量，并增加了TCLP可提取的砷含量。②与对照组相比，添加Fe₂(SO₄)₃使辣椒果实中铅和镉的含量分别降低了7.2%-22.9%和2.3%-2.9%，但辣椒果实中砷的含量没有明显变化。同时，添加CaCO₃使辣椒果实中铅、镉和砷的含量分别降低了15.8%-16.3%、11.8%-15.0%和0.03%-53.2%。③与对照组相比，由于施用Fe₂(SO₄)₃，辣椒植株中铅、镉和砷从茎到果实的转运系数最大降幅分别为16.7%、68.0%、10.2%，由于施用CaCO₃，降幅分别为16.7%、51.5%、45.6%。显然，Fe₂(SO₄)₃和CaCO₃都能有效降低土壤中铅、镉和砷向辣椒植株的迁移，但CaCO₃的效果优于Fe₂(SO₄)₃。