Effects of paper sludge addition on the bioavailability and distribution of Pb in contaminated soil

Q3 Chemical Engineering Chemical Speciation and Bioavailability Pub Date : 2015-10-02 DOI:10.1080/09542299.2015.1121519

Nannan Zhao, Xiaoming He, Zhenshanl Li, Huazhang Zhao

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引用次数: 1

Abstract

Abstract Heavy metal contamination of soil poses risks and hazards to environment and human being. Many amendments were used to remediate the contaminated soil. In this report, paper sludge was used to reduce the bioavailability of Pb in soil, and the remediation mechanism was studied by investigating the redistribution of Pb speciation after paper sludge addition. In pot experiments, significantly increased weights of shoots (from 1.6 to 3.3 mg per plant) and roots (from 0.7 to 0.8 mg per plant), as well as significantly decreased Pb content in shoots (from 153.8 to 24.4 mg kg−1) and roots (from 467.1 to 38.0 mg kg−1) of rape were observed after paper sludge was added. The addition of paper sludge resulted in redistribution of Pb from the liable fractions (carbonate-bound Pb from 58.3 to 3.7%) to the Fe–Mn oxide-bound fraction (from 29.2 to 74.9%). Paper sludge addition increased the content of organic matters and pH of soil, and induced Pb redistribution, which ultimately inhibited Pb uptake and improved plant growth.

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添加纸污泥对污染土壤中铅的生物有效性和分布的影响

土壤重金属污染给环境和人类带来了风险和危害。许多改良剂被用来修复被污染的土壤。本研究利用纸污泥降低土壤中铅的生物有效性，并通过研究添加纸污泥后铅形态的再分布来研究其修复机制。盆栽试验中，添加纸污泥显著提高了油菜茎部(从1.6 mg /株增加到3.3 mg /株)和根系(从0.7 mg /株增加到0.8 mg /株)的质量，显著降低了油菜茎部(从153.8 mg / kg - 1减少到24.4 mg / kg - 1)和根系(从467.1 mg / kg - 1减少到38.0 mg / kg - 1) Pb含量。纸污泥的添加导致铅从易受影响的组分(碳酸盐结合的Pb从58.3增加到3.7%)重新分布到铁锰结合的组分(从29.2增加到74.9%)。添加纸污泥可提高土壤有机质含量和pH值，诱导铅重新分布，最终抑制植物对铅的吸收，促进植物生长。

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来源期刊

Chemical Speciation and Bioavailability 环境科学-毒理学

CiteScore

1.62

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： Chemical Speciation & Bioavailability ( CS&B) is a scholarly, peer-reviewed forum for insights on the chemical aspects of occurrence, distribution, transport, transformation, transfer, fate, and effects of substances in the environment and biota, and their impacts on the uptake of the substances by living organisms. Substances of interests include both beneficial and toxic ones, especially nutrients, heavy metals, persistent organic pollutants, and emerging contaminants, such as engineered nanomaterials, as well as pharmaceuticals and personal-care products as pollutants. It is the aim of this Journal to develop an international community of experienced colleagues to promote the research, discussion, review, and spread of information on chemical speciation and bioavailability, which is a topic of interest to researchers in many disciplines, including environmental, chemical, biological, food, medical, toxicology, and health sciences. Key themes in the scope of the Journal include, but are not limited to, the following “6Ms”: Methods for speciation analysis and the evaluation of bioavailability, especially the development, validation, and application of novel methods and techniques. Media that sustain the processes of release, distribution, transformation, and transfer of chemical speciation; of particular interest are emerging contaminants, such as engineered nanomaterials, pharmaceuticals, and personal-care products. Mobility of substance species in environment and biota, either spatially or temporally. Matters that influence the chemical speciation and bioavailability, mainly environmentally relevant conditions. Mechanisms that govern the transport, transformation, transfer, and fate of chemical speciation in the environment, and the biouptake of substances. Models for the simulation of chemical speciation and bioavailability, and for the prediction of toxicity. Chemical Speciation & Bioavailability is a fully open access journal. This means all submitted articles will, if accepted, be available for anyone to read, anywhere, at any time. immediately on publication. There are no charges for submission to this journal.