Risk analysis on heavy metal contamination in sediments of rivers flowing into Nansi Lake

Abstract

In order to understand the risk of heavy metals in sediments of the rivers flowing into Nansi Lake, 36 surface sediments were sampled from six rivers and seven heavy metals (Cr, Cu, Ni, Zn, As, Pb, and Cd) were determined. Potential ecological risk index (RI) of the six rivers showed significant differences: Xinxue River, Jiehe River, and Guangfu River were at medium potential risk, whereas the risk of Chengguo River was the lowest. Jiehe River, Xuesha River, and Jiangji River were meeting the medium potential risk at river mouths. Geo-accumulation index (I ) of the seven heavy metals revealed that the contamination of Cu and Cd was more serious than most other metals in the studied areas, whereas Cr in most sites of our study was not polluted. Moreover, correlation cluster analysis demonstrated that the contamination of Cu, Ni, and Zn in six rivers was mainly caused by local emissions, whereas that of As, Pb, and Cd might come from the external inputs in different forms. Consequently, the contamination of Cu and Cd and the potential risk in Xinxue River, Jiehe River, and Guangfu River as well as the local emissions should be given more attention to safeguard the water quality of Nansi Lake and the East Route Project of South to North Water Transfer.

Source Apportionment and Risk Assessment of Heavy Metals (Cd, Cu, Ni, Pb, Zn, and Mn) in Surface Sediments from the Dragon Lake, Bengbu, China

“…E r i is the potential ecological assessment coefficent for a certain metal, RI is the comprehensive potential ecological risk index. The criteria for ecological potential risk of heavy metals were presented in Table 1 [18].…”

Temporal Distribution Characteristic and Risk Analysis of Heavy Metals in Greenhouse Vegetable Soils

“…The higher concentrations of Cr, Ni, Cu, Zn, Cd, and Pb in GVS than the background values indicate anthropogenic effects [38], a finding that is in accordance with the significantly high CV of Zn, Cd, and Pb -especially in the first lustrum duration of GVS, which demonstrate that GVS is prone to metal accumulation and can be affected by farming activities in this cultivation stage. Factor analysis, principle component analysis and cluster analysis were also used to explore the sources of heavy metals in soils and sediments in previous studies [12,39,40]. The cluster of Cr, Cu, and Ni indicated their similar human inputs, and so was the cluster of Pb and Zn.…”

Determination of the Risk on Human Health of Heavy Metals Contained by Ship Source Bilge and Wastewater Discharged to the Sea on the Mediterranean by Monte Carlo Simulation

“…Heavy metal concentrations were calculated using MCS to determine risk calculations from 36 samples taken from Lake Nancy [39]. Risk analysis was performed using the SPSS program and measuring seven heavy metals (Cr, Cu, Ni, Zn, As, Pb and Cd).…”