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利用 EDTA 萃取法评估河流沉积物中痕量金属的污染、物种分布和迁移性。

Assessment of Trace Metals Contamination, Species Distribution and Mobility in River Sediments Using EDTA Extraction.

机构信息

Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska 20, 00-653 Warsaw, Poland.

出版信息

Int J Environ Res Public Health. 2022 Jun 7;19(12):6978. doi: 10.3390/ijerph19126978.

DOI:10.3390/ijerph19126978
PMID:35742226
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9222726/
Abstract

The impact of the ethylenediaminetetraacetic acid (EDTA) on speciation image of selected trace metals (Zn, Cd, Cu, Pb) in bottom sediments was determined. The influence on the effectiveness of metal removal of extraction multiplicity, type of metal, extraction time and concentration of EDTA were analyzed. With the increase of extraction multiplicity, the concentration of EDTA and contact time, the efficiency of trace metals leaching increased. The speciation analysis revealed that EDTA not only leached metals from bioavailable fractions, but also caused the transition of the metals between the fractions. The biggest amounts of bioavailable forms were found for Cd, less for Zn. The amount of bioavailable fraction was the lowest for Cu and Pb. The two first-order kinetic models fitted well the kinetics of metals extraction with EDTA, allowing the metals fractionation into "labile" (Q), "moderately labile" (Q) and "not extractable" fractions (Q).

摘要

测定了乙二胺四乙酸（EDTA）对底泥中选定痕量金属（Zn、Cd、Cu、Pb）形态的影响。分析了提取倍数、金属类型、提取时间和 EDTA 浓度对金属去除效果的影响。随着提取倍数、EDTA 浓度和接触时间的增加，痕量金属浸出的效率增加。形态分析表明，EDTA 不仅从生物可利用部分浸出金属，还导致金属在各部分之间的转移。发现 Cd 的生物可利用形式最多，Zn 次之，Cu 和 Pb 最少。两种一级动力学模型很好地拟合了 EDTA 提取金属的动力学，允许将金属分为“不稳定”（Q）、“中等不稳定”（Q）和“不可提取”（Q）部分。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/8c782c828d42/ijerph-19-06978-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/655510cecce6/ijerph-19-06978-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/42dac5d93ab4/ijerph-19-06978-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/b7fba2e8eeed/ijerph-19-06978-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/0b7f4d1e0ef5/ijerph-19-06978-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/9214932e0d3f/ijerph-19-06978-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/a629bf47c6a2/ijerph-19-06978-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/8c782c828d42/ijerph-19-06978-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/655510cecce6/ijerph-19-06978-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/42dac5d93ab4/ijerph-19-06978-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/b7fba2e8eeed/ijerph-19-06978-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/0b7f4d1e0ef5/ijerph-19-06978-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/9214932e0d3f/ijerph-19-06978-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/a629bf47c6a2/ijerph-19-06978-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2634/9222726/8c782c828d42/ijerph-19-06978-g007.jpg

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