新鲜的城市固体废物有机物增强了从污染土壤中植物提取重金属。
Fresh organic matter of municipal solid waste enhances phytoextraction of heavy metals from contaminated soil.
机构信息
Dipartimento di Produzione Vegetale, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy.
出版信息
Environ Pollut. 2010 May;158(5):1899-906. doi: 10.1016/j.envpol.2009.10.039. Epub 2009 Nov 22.
In this study, the ability of the organic fraction of municipal solid wastes (OFMSW) to enhance heavy metal uptake of maize shoots compared with ethylenediamine disuccinic acid (EDDS) was tested on soil contaminated with heavy metals. Soils treated with OFMSW and EDDS significantly increased the concentration of heavy metals in maize shoots (increments of 302%, 66%, 184%, 169%, and 23% for Cr, Cu, Ni, Zn, and Pb with respect to the control and increments of 933%, 482%, 928%, 428%, and 5551% for soils treated with OFMSW and EDDS, respectively). In soil treated with OFMSW, metal uptake was favored because of the high presence of dissolved organic matter (DOM) (41.6x than soil control) that exhibited ligand properties because of the high presence of carboxylic acids. Because of the toxic effect of EDDS on maize plants, soil treated with OFMSW achieved the highest extraction of total heavy metals.
在这项研究中，测试了与乙二胺二琥珀酸（EDDS）相比，城市固体废物的有机部分（OFMSW）在重金属污染土壤中增强玉米幼苗吸收重金属的能力。用 OFMSW 和 EDDS 处理的土壤显著增加了玉米幼苗中重金属的浓度（相对于对照，Cr、Cu、Ni、Zn 和 Pb 的浓度分别增加了 302%、66%、184%、169%和 23%，用 OFMSW 和 EDDS 处理的土壤分别增加了 933%、482%、928%、428%和 5551%）。在添加 OFMSW 的土壤中，由于溶解态有机物（DOM）的高含量（比对照土壤高 41.6 倍），金属的吸收得到了促进，这是由于羧酸的高含量表现出配体性质。由于 EDDS 对玉米植物的毒性作用，用 OFMSW 处理的土壤实现了总重金属的最高提取。
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