Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in the East Dongting and Honghu Lake, China

Makokha, Victorine Anyango; Qi, Yueling; Shen, Yun Heng; Wang, Jun

doi:10.1007/s12403-015-0180-8

Cited by 64 publications

(27 citation statements)

References 30 publications

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“…PCA (principle component analysis) is widely used to verify and quantify pollution sources of heavy metals [8,9,50]. In the present study, Kaiser-Meyere-Olkin and Bartlett's results were 0.756 and 254 (df = 45, p < 0.001), respectively, indicating that PCA can be used to reduce dimensionality.…”

Section: Sources Identificationsupporting

confidence: 54%

Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China

Tang

Yan

et al. 2018

Water

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Surface sediment samples were collected from 19 sites throughout Daya Bay, China to study the concentrations, spatial distributions, potential ecological risk, and possible sources of heavy, including metals copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), nickel (Ni), lead (Pb), mercury (Hg), and chromium (Cr). The mean concentrations of the eight heavy metals were 24, 109, 6.5, 0.09, 35.3, 26.8, 0.07, and 109 µg g −1 , respectively. The concentrations of most heavy metals were within range of those recorded in previous years. The spatial distribution pattern of most heavy metals were similar, with lowest values recorded along the southeast coast and the open sea area; the highest values were recorded in the northern Daya Bay, especially the northwest. Cu, Zn, As, Cd, Pb, and Hg were classified as Class I, and Ni and Cr were classified as Class II according to the Sediment Quality Guidelines (SQGs) of China. The potential ecological risk (E i f) indices of Cu, Zn, As, Pb, Ni, and Cr specify that these metals pose low risk to the ecosystem of the Bay, whereas Cd and Hg pose a very high risk in some sites. The geoaccumulation indices (I geo) of Cu, Zn, As, Ni, and Cr specify weak or no pollution in Daya Bay, whereas those of Pb, Cd, and Hg in some sites indicate moderate or even high pollution. Spatial distribution, carbon/nitrogen analysis, Pearson correlation, and principal components analysis indicated that Cu, Zn, As, Pb, Ni, Cr, total organic carbon (TOC), and total nitrogen (TN) originated from the same sources. Ballast water or sewage from the cargo ships that park at the harbors or anchor in the Bay were the important sources for Cu, Zn, As, Pb, Ni, Cr, TOC, and TN. Other anthropogenic sources, such as agricultural runoff and aquaculture, might also be responsible, whereas Hg and Cd originated from other point sources.

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Section: Sources Identificationsupporting

confidence: 54%

Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China

Tang

Yan

et al. 2018

Water

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“…Contaminations, including organic pollutants, trace elements and elevated nutrients are the origins of the pollution. Moreover, trace elements have been confirmed to have potential biological risk, ecological risk, and health risk [ 1 , 2 , 3 , 4 ]. The pollution of trace elements in surface water has drawn particular attention globally, and has been widely studied with respect to migration mechanisms [ 5 ], toxicity [ 6 ], accumulation mechanism [ 7 ], ecological hazards [ 8 ] and the impact on human health [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution and Fuzzy Health Risk Assessment of Trace Elements in Surface Water from Honghu Lake

Qiu

Zhang

et al. 2017

IJERPH

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Previous studies revealed that Honghu Lake was polluted by trace elements due to anthropogenic activities. This study investigated the spatial distribution of trace elements in Honghu Lake, and identified the major pollutants and control areas based on the fuzzy health risk assessment at screening level. The mean total content of trace elements in surface water decreased in the order of Zn (18.04 μg/L) > Pb (3.42 μg/L) > Cu (3.09 μg/L) > Cr (1.63 μg/L) > As (0.99 μg/L) > Cd (0.14 μg/L), within limits of Drinking Water Guidelines. The results of fuzzy health risk assessment indicated that there was no obvious non-carcinogenic risk to human health, while carcinogenic risk was observed in descending order of As > Cr > Cd > Pb. As was regarded to have the highest carcinogenic risk among selected trace elements because it generally accounted for 64% of integrated carcinogenic risk. Potential carcinogenic risk of trace elements in each sampling site was approximately at medium risk level (10−5 to 10−4). The areas in the south (S4, S13, and S16) and northeast (S8, S18, and S19) of Honghu Lake were regarded as the risk priority control areas. However, the corresponding maximum memberships of integrated carcinogenic risk in S1, S3, S10–S13, S15, and S18 were of relatively low credibility (50–60%), and may mislead the decision-makers in identifying the risk priority areas. Results of fuzzy assessment presented the subordinate grade and corresponding reliability of risk, and provided more full-scale results for decision-makers, which made up for the deficiency of certainty assessment to a certain extent.

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“…Hudu River, with a total length of 137.7 km, after flowing through Mituo Temple, Huangjinkou, Zhakou, Haungshantou Controlling Gate, and Dongjiadang to Anxiang River of new mouth Songzi East Branch after being diverted at Taiping estuary, it flows into Lishui River spillway in Xiaojiawan. Songzi River, a spillway diverted into the lake by the distributary of Songzi estuary, is divided into two branches [21]. The two branches are further divided into three branches in Hunan province.…”

Section: Description Of the Study Areamentioning

confidence: 99%

An evaluation of the ecological security of the Dongting Lake, China

Wang¹,

Zhang²,

Kang³

et al. 2018

Desalination and Water Treatment

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Evaluation of lake ecological security is important for sustainable management of lakes and regional ecological environment construction. Dongting Lake is the second largest freshwater lake in China; its ecological security directly threatens the ecological security of the middle and lower reaches of the Yangtze River. In this paper, the ecological security evaluation index system of the Dongting Lake is constructed, including target layer (first order), criterion layer (second order), and index layer (last order). The target layer is the ecological security of the lake, the standard layer includes five indicators, and the index layer includes 11 indicators. The comprehensive evaluation method is used to evaluate the ecological security of the Dongting Lake by assessing all indexes of every layer. The weight of each index is determined by analytic hierarchy process. The evaluation results showed that the ecological security score of the Dongting Lake is 58 points, belonging to sub-security level. At present, the Dongting Lake has problems of low ecological water level, reduced lake surface area, eutrophication, and reduced lake storage capacity. Therefore, in future, the industrial and domestic pollution sources should be controlled, and the carrying capacity of water environment should be improved.

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Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in the East Dongting and Honghu Lake, China

Cited by 64 publications

References 30 publications

Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China

Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China

Spatial Distribution and Fuzzy Health Risk Assessment of Trace Elements in Surface Water from Honghu Lake

An evaluation of the ecological security of the Dongting Lake, China

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