THE CHEMICAL FRACTIONATION OF ZN, PB AND CD IN CONTAMINATED SOILS BEFORE AND AFTER BATCH EXTRACTION BY EDTA

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

AHMADIAN Z.; OUSTAN SH.; REYHANITABAR A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Journal of Soil Management and Sustainable Production Year:2016 | Volume:6 | Issue:1 Page(s): 69-89

Download Full-Text

Persian Verion

View:

746

Download:

Cites:

Information Journal Paper

Title

THE CHEMICAL FRACTIONATION OF ZN, PB AND CD IN CONTAMINATED SOILS BEFORE AND AFTER BATCH EXTRACTION BY EDTA

Author(s)

AHMADIAN Z. | OUSTAN SH. | REYHANITABAR A. | Issue Writer Certificate

Keywords

BATCH EXTRACTIONQ1

EXTRACTION PERCENTAGEQ1

MOBILITY FACTORQ1

REMOVAL EFFICIENCYQ1

SEQUENTIAL EXTRACTIONQ1

Abstract

Background and Objectives: SEQUENTIAL EXTRACTION methods of Sposito et al. (method A) and Tessier et al. (method B) are distinguished from other methods by simplicity and popularity, respectively. Method B first was tested in two fluvial deposits and then widely used in all sediments, sludge compost and heavy metal contaminated soils. Method A basically was proposed for determination of chemical forms of metals in sludge, soils incubated with sludge and wastewater irrigated soils. However, thereafter the method was used in contaminated soils around of mines and smelters. Some researchers reported that washing heavy metal contaminated soils by strong complexing agents like EDTA lead to transformation of heavy metals from low-mobile to highmobile forms. There are several environmental concerns regarding abandoned contaminated soils after washing. Therefore, study of effective factors on removal of heavy metals from high-mobile forms is of importance for using of these complexing agents either in washing or phytoremediation.In the current study, attempts were made to investigate the distribution and mobility of Zn, Pb and Cd in contaminated soils before and after BATCH EXTRACTION by EDTA.Materials and Methods: Three soil samples with different heavy metal contents were taken from 0-20 cm depth of the zinc-lead smelting plant area in Zanjan. Some physical and chemical characteristics of the soils were determined. Thereafter, the chemical forms of Zn, Pb and Cd in the soils were determined before and after BATCH EXTRACTIONs by 0.1 mole of EDTA per one kilogram of soil using two methods of Sposito et al. (1982) (method A) and Tessier et al. (1979) (method B). The EXTRACTION PERCENTAGE, form distribution, REMOVAL EFFICIENCY and MOBILITY FACTOR of the heavy metals were determined using two above mentioned methods and then compared.Results: The results indicated the higher effectiveness of hot nitric acid in extraction of Cd and in turn the higher effectiveness of aqua regia in extraction of Zn and Pb. The method A, particularly carbonate form, showed major removal after washing. The sum of different forms introduced carbonate and residual forms as dominant form for all three metals in all three soils. In addition, these forms of a given heavy metal obtained from the method A were greater than that of method B.Unlike the method A, in which the dominant removal of Pb by EDTA was from the carbonate form, this removal was from the oxide form in the method B. Also, unlike the method A, in which the exchangeable forms of the metals increased after washing, some severe decreases were observed in the method B. Also, the highest and lowest removal efficiencies were observed for Cd (using method A) and Pb (using method B), respectively. The MOBILITY FACTOR of Zn after BATCH EXTRACTION by EDTA intensely decreased. Additionally, the MOBILITY FACTOR of Pb after extraction significantly increased.The MOBILITY FACTOR of Cd after washing almost decreased.Conclusion: The results indicate the influence of residual amount of EDTA in washed soils on determination of chemical forms of heavy metals. Therefore, care in interpretation of data from determination methods of heavy metal chemical forms, particularly in washes soils is necessary.Both of two methods revealed the increased mobility of Pb in soils after washing. This emphasizes using auxiliary procedures such as phytoremediation for decontaminating soils after washing.

Cites

No record.

References

No record.

Cite

APA: Copy

AHMADIAN, Z., OUSTAN, SH., & REYHANITABAR, A.. (2016). THE CHEMICAL FRACTIONATION OF ZN, PB AND CD IN CONTAMINATED SOILS BEFORE AND AFTER BATCH EXTRACTION BY EDTA. ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION, 6(1), 69-89. SID. https://sid.ir/paper/209870/en

Vancouver: Copy

AHMADIAN Z., OUSTAN SH., REYHANITABAR A.. THE CHEMICAL FRACTIONATION OF ZN, PB AND CD IN CONTAMINATED SOILS BEFORE AND AFTER BATCH EXTRACTION BY EDTA. ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION[Internet]. 2016;6(1):69-89. Available from: https://sid.ir/paper/209870/en

IEEE: Copy

Z. AHMADIAN, SH. OUSTAN, and A. REYHANITABAR, “THE CHEMICAL FRACTIONATION OF ZN, PB AND CD IN CONTAMINATED SOILS BEFORE AND AFTER BATCH EXTRACTION BY EDTA,” ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION, vol. 6, no. 1, pp. 69–89, 2016, [Online]. Available: https://sid.ir/paper/209870/en

Related Journal Papers