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Potential health risk assessment of contaminants in soil-like material recovered from landfill mining

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Abstract

Landfill mining is an innovative technique to clear dumpsites and recover valuables from legacy waste. Bio-earth, referred here as soil-like material, constitutes a major portion of the legacy waste fraction. The characterisation of Soil Like Material from Ariyamangalam Dumpyard and estimation of pollution indices by comparing with the background soil helps in the identification of the contamination level. The potential health risk associated with the contaminants in Soil Like Material is highlighted. A statistical correlation was also done for various parameters of Soil Like Material to identify the indicator element through the Spearman rank correlation method. The degree of contamination based on eight heavy metals taken into account shows a value of 48.23, which is in the range of very high contamination. The major pollution is induced by the lead present in the Soil Like Material compared to the background soil, followed by chromium and zinc. Lead shows the maximum contamination factor of 19, pollution index of 23.3, geo-accumulation index of 4.2 and enrichment factor of 19. The hazard index is in the order of Cr > Pb > Cu > Ni > Cd > Zn > Hg > As for the heavy metals. Among all heavy metals, the cumulative cancer risk is more due to nickel (0.06 and 0.006 for children and adults, respectively) which is harmful to human health. Hexavalent chromium was found to be an indicator element by significantly correlating with four other parameters. The results of the health risk assessment (HRA) and pollution indices add value to the application of Soil Like Material fractions both onsite and offsite.

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Saravanan Gurusamy: conceptualization, methodology, analysis and writing the original draft. Ramesh Srikrishna Perumal Thangam: review, editing, supervision, validation and project administration. All authors read and approved the final version to be published.

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Correspondence to Ramesh Srikrishna Perumal Thangam.

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Gurusamy, S., Thangam, R.S.P. Potential health risk assessment of contaminants in soil-like material recovered from landfill mining. Environ Monit Assess 195, 330 (2023). https://doi.org/10.1007/s10661-022-10850-x

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  • DOI: https://doi.org/10.1007/s10661-022-10850-x

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