Heavy metal signatures in urban and peri-urban agricultural soils across the Mumbai Metropolitan Region, India

Vazhacharickal, Prem Jose and Gurav, Trupti and Chandrasekharam, D. (2018) Heavy metal signatures in urban and peri-urban agricultural soils across the Mumbai Metropolitan Region, India. Nutrient Cycling in Agroecosystems. ISSN 1385-1314

Abstract

Millennium Development Goals recognized the contribution of urban and peri-urban agriculture (UPA) towards food security, income generation, and livelihood strategies. Given the scarcity of relevant data, the present study was conducted to assess heavy metal load of UPA soils (at 0.00–0.20, 0.20–0.60 and 0.60–1.00 m depth) in Mumbai Metropolitan Region, India by comparing the signatures from soil profiles of three railway gardens (RG1–3) and three farms (F1–3) over 2 years. Potential human health risks of consuming produce from these soils were assessed using the contamination factor, degree of contamination, pollution load index (PLI), enrichment factor, geoaccumulation index (Igeo), and total metal and element content in comparison with different safety standards. Semi-sequential extractions were performed to determine the concentration of available elements and heavy metals for plants. The total concentration of heavy metals (Cr, Ni, and Sr) exceeded the critical thresholds in all surface soils, while the contribution of water-soluble and exchangeable fractions of Cu, Fe, Co, and Cr was negligible across the selected gardens. At the same soil depth, the PLI was highest for RG3 (3.6) at 0.00–0.20 m depth and lowest in RG2 (1.2). The Igeo value for individual elements ranged from 0.08 to 0.12 (Ni), 0.06 to 0.12 (Cr), 0.07 to 0.10 (Zn), 0.10 to 0.18 (Cu), and 0.24 to 0.34 (Co), whereas the value for Mn was 0.01 similar in all gardens. The soil pollution assessments by these indices revealed moderate to considerable (chromium and strontium) heavy metal contamination and accumulation, however, the origin of these metals remain unclear. © 2018, Springer Nature B.V.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published online: 17 December 2018. Permanent restricted access to ArticleFirst version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 01 Mar 2019 01:26
Last Modified: 05 Mar 2019 01:12
Uncontrolled Keywords: enrichment factor; geogenic; pollution load index; wastewater use
Fields of Research : 05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070303 Crop and Pasture Biochemistry and Physiology
05 Environmental Sciences > 0503 Soil Sciences > 050302 Land Capability and Soil Degradation
Identification Number or DOI: 10.1007/s10705-018-9966-y
URI: http://eprints.usq.edu.au/id/eprint/35988

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