10.6084/m9.figshare.6494699.v1
Lei Gao
Lei
Gao
Zhuowei Wang
Zhuowei
Wang
Aiping Zhu
Aiping
Zhu
Zuobing Liang
Zuobing
Liang
Jianyao Chen
Jianyao
Chen
Changyuan Tang
Changyuan
Tang
Quantitative source identification and risk assessment of trace elements in soils from Leizhou Peninsula, South China
Taylor & Francis Group
2018
soil pollution
geological condition
anthropogenic contribution
multivariate statistical techniques
ecological and health risk
2018-06-12 17:44:30
Journal contribution
https://tandf.figshare.com/articles/journal_contribution/Quantitative_source_identification_and_risk_assessment_of_trace_elements_in_soils_from_Leizhou_Peninsula_South_China/6494699
<p>Differentiating contribution of natural sources and anthropogenic inputs to soil element concentrations can provide important basis for pollution and risk assessments. Fifty-five surface soil samples were collected from farmland (<i>n</i> = 33) and forest land (<i>n</i> = 22) in the Leizhou Peninsula for the measurement of trace elements (Cr, Co, Ni, Cu, Zn, As, Pb, and Cd) concentrations. It was found that soil Cr, Ni, Cu, Zn and Cd concentrations were significantly higher in farmland soils than in forest soils (<i>p</i> < 0.05). Industrial discharges accounted for the increase in Cr, Co, Ni, and Cu concentrations with mean contribution rates of 10.9%, 29.4%, 23.2%, and 25.3%, whereas agricultural activities contributed significantly (14.6%−92.4%) to soil Cd levels. The pollution levels of individual element based on a geo-accumulation index, and enrichment and contamination factors roughly followed a decreasing order of Cd > Co ≈ Cu ≈ Ni ≈ Cr > Zn ≈ As ≈ Pb. Severe contamination was found near industrial areas, which resulted in a moderate or considerable ecological risk. Soil Cr mainly derived from weathering process of basaltic rocks and industrial sources resulted in non-carcinogenic hazard and carcinogenic risk indices up to 2.47 and 2.79 × 10<sup>–4</sup>, respectively, near industrial areas, leading to that children suffered more from higher non-carcinogenic and carcinogenic risks than adults.</p>