Occurrence, geochemical fraction, ecological and health risk assessment of cadmium, copper and nickel in soils contaminated with municipal solid wastes.

Autor: Gujre N; Agro-ecotechnology Laboratory, Centre for Rural Technology, Indian Institute of Technology Guwahati (IITG), Assam, 781039, India., Rangan L; Agro-ecotechnology Laboratory, Centre for Rural Technology, Indian Institute of Technology Guwahati (IITG), Assam, 781039, India; Applied Biodiversity Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Assam-781039, India., Mitra S; Agro-ecotechnology Laboratory, Centre for Rural Technology, Indian Institute of Technology Guwahati (IITG), Assam, 781039, India. Electronic address: sudipmitra@yahoo.com.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2021 May; Vol. 271, pp. 129573. Date of Electronic Publication: 2021 Jan 07.
DOI: 10.1016/j.chemosphere.2021.129573
Abstrakt: Unscientific municipal solid waste (MSW) dumping provokes heavy metal (HM) associated ecological and human health hazards through heightened bioavailability and bioaccumulation. In this study, we focused on three important HMs Cadmium (Cd), Copper (Cu) and Nickel (Ni) and their geochemical fractions, to enable clutter free data management, analysis and interpretation. Stratified random soil sampling was carried out from twenty different locations around a Ramsar site (Deepor Beel) in Guwahati, India. The spatial concentration profiles of Cd, Cu and Ni were determined by data elicited from geochemical fractionation and the Geographic Information System (GIS). Ecological and health risks indices were used to evaluate the severity of soil pollution and assess the level of health risks. All the three HMs thus evaluated, conformed to the potential bioavailable category. Cd (54.59%) was associated mostly with the carbonate bound fraction (F3), while 25.53% of Cu and 40.60% Ni were associated with the exchangeable fraction (F2). Significant contamination levels and higher ecological risks posed by these metals were in the order Cd > Ni > Cu. Children were found to be more vulnerable towards Cd associated health risks whereas, Ni posed threats to both adults and children. Cu posed no risk to human health. Geochemical fractionation and different indices played a critical role in the integrated assessment of soil pollution, ecological and health risk assessment, and provided an empirical basis for the sustainable future planning and comprehensive adaptive management practices for MSW.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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