Potential Ecological Risk Assessment of Heavy Metals in Sediments from Hongfeng Lake, China

2010 ◽  
Vol 113-116 ◽  
pp. 1591-1596
Author(s):  
Ji Wei Hu ◽  
Feng Liu ◽  
Xian Fei Huang ◽  
Fan Xin Qin ◽  
Jin Mei
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Reference Data ◽  
Potential Ecological Risk ◽  
Guizhou Province ◽  
Toxic Response ◽  
Pollution Levels ◽  
Risk Indices ◽  
Ecological Hazards ◽  
Hongfeng Lake

Hongfeng Lake, a man-made reservoir, is one of the five key drinking-water sources for Guiyang City, the capital of Guizhou Province in southwestern China. In the present research, the distribution and accumulation characteristics of seven heavy metals (Pb, Cd, As, Hg, Cu, Cr and Zn) in the sediment of this lake were analyzed by examining fourteen sediment samples. A method based on toxic-response factor was used to assess the potential ecological risk of these heavy metals to this lake. For comparison, the two sets of reference data representing the pre-industrial and the local baseline pollution levels of interested heavy metals were employed to derive their accumulating coefficients and potential ecological risk indices. The calculated potential ecological risk indices indicate that the lake was polluted by heavy metals, and both mercury and cadmium loadings were critical factors responsible for the ecological hazards posed to Hongfeng Lake among these seven elements.

Ecological Risk Assessment of Heavy Metals in Sediments from Aha Lake, China

2011 ◽  
Vol 356-360 ◽  
pp. 896-902 ◽  
Author(s):  
Xian Fei Huang ◽  
Ji Wei Hu ◽  
Cun Xiong Li ◽  
Jia Jun Deng ◽  
Fan Xin Qin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Reference Data ◽  
Potential Ecological Risk ◽  
Response Factors ◽  
Toxic Response ◽  
Pollution Levels ◽  
Critical Elements ◽  
Baseline Values ◽  
Aha Lake

In the present work, contamination and potential ecological risk of six heavy metals (Pb, Cd, Hg, As, Cu and Zn) in sediments of Aha Lake, one of the five drinking water sources for Guiyang City, were assessed based on a method which is associated with toxic-response factors of contaminants. For comparison, the two sets of reference data representing the pre-industrial and the local baseline pollution levels were employed. When the pre-industrial levels were taken as references, the accumulating coefficients on average diminished in the order of Zn > As > Hg > Cd > Cu > Pb, and the potential ecological risk descended in the order of Hg > Cd > As > Cu > Zn > Pb. When the local baseline values worked as references, the accumulating coefficients on average diminished in the order of Cd > Zn > Hg > Cu > As > Pb, and the potential ecological risk descended in the order of Cd > Hg > As > Cu > Zn > Pb. It is evident that Cd and Hg are the critical elements in terms of potential ecological hazard in Aha Lake among these six heavy metals.

scholarly journals Historical Evolution of Sources and Pollution Levels of Heavy Metals in the Sediment of the Shuanglong Reservoir, China

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1855 ◽  
Author(s):  
Zike Zhou ◽  
Yongping Wang ◽  
Haowei Teng ◽  
Hao Yang ◽  
Aiju Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Metal Content ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Heavy Metal Content ◽  
Ecological Risk Index ◽  
Potential Ecological Risk Index ◽  
Pollution Levels

In this study, the concentrations of seven heavy metals (Cr, Ni, Cu, Zn, As, Hg, and Pb) and Pb isotope in a sediment core from the Shuanglong reservoir, Southwestern China, were investigated. Based on the constant rate of supply (CRS) model, the age span of a 60 cm sediment sample was determined to range from the years 1944 to 2015. Combined with chronology and heavy metal content, the evolution of the sources and pollution levels of heavy metals showed a changing trend composed of various stages. The sources of heavy metals transitioned from natural origins in 1944–1964 to industrial origins in 1965–2004. The subsequent reduction in heavy metal content was mainly due to the vigorous implementation of environmental protection policies from 2005 to 2012. In recent years (2013–2015), the heavy metal content has increased due to frequent human activity. Principal component analysis (PCA), correlation analysis, and the coefficient of variation (CV) analysis indicated that Cr, Ni, Cu, Zn, and As were derived from natural processes, Pb mainly came from automobile manufacturing, and Hg was mainly from industrial sources. The values of the geo-accumulation index (Ig), single pollution index (Pi), and single potential ecological risk index (Er) showed that the contamination of Hg and Pb was slight to moderate. Moreover, the values of the potential ecological risk index (RI), pollution load index (PLI), and Nemerow index (PN) indicated that the Shuanglong reservoir is under low ecological risk.

scholarly journals Evaluation of Heavy Metal Pollutants From Plateau Mines in Wetland Surface Deposits

2021 ◽  
Vol 8 ◽  
Author(s):  
Li Yu ◽  
Shi Kaiyi ◽  
Yuan Jie ◽  
Kuang Qiyu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Human Activities ◽  
Surface Sediments ◽  
Potential Ecological Risk ◽  
Toxic Heavy Metals ◽  
Artificial Wetlands ◽  
Mining Areas ◽  
Pollution Levels

The Liupanshui Minghu Wetland is a typical artificial urban wetland in a plateau mining region. It is important to identify the sources and potential ecological risks of heavy metal contaminants in its surface sediments to monitor the wetland and the downstream water quality and prevent pollution. In this study, we measured the concentrations of six toxic heavy metals (Pb, Zn, Cr, Cu, Ni, and Cd) in the surface sediments collected from the Liupanshui Minghu Wetland. Further, the geological accumulation indices of heavy metals and their potential ecological risk indices, pollution levels, and associated ecological hazards were evaluated. The average levels of Pb, Zn, Cr, Cu, Ni, and Cd in the superficial sediments were 197, 222, 79.0, 59.1, 68.6, 4.67 mg/kg, respectively. With the exception of Cr, the concentrations of the remaining metals were greater than the background levels in the region. The Statistical analysis indicated a strong correlation between Pb, Zn, Cr, and Cu (p < 0.01). The pollution in the wetland by these elements can be attributed to human activities such as transportation, industrial activity, and agricultural production. Ni and Cd pollution can be attributed to human activities, such as coal mining, and natural phenomena, such as the weathering of mountains and rocks. The geological accumulation indices of Zn, Ni, and Cu indicated low levels of accumulation and minimal contamination. Cd and Pb were moderately enriched, and the levels of Cd and Pb contamination ranged from moderate to high. The potential ecological risk to the Shiyuan region (S) was the highest among the three regions in the wetland park. It was followed by the Longtoutan (L) region, and the potential ecological risk was the lowest in the Erdaoba (E) region. Among the six heavy metals, Cd was the main contributor to pollution in the Minghu Wetland. This study also strives to provide theoretical basis and data support for the prevention and control of heavy metal pollution in artificial wetlands in Alpine mining areas.

scholarly journals Hydrocarbon Pollution and Potential Ecological Risk of Heavy Metals in the Sediments of the Oturuba Creek, Niger Delta, Nigeria

2017 ◽  
Vol 10 (1-2) ◽  
pp. 1-10
Author(s):  
Clinton Ifeanyichukwu Ezekwe ◽  
Israel Clinton Utong
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Oil Pollution ◽  
Sediment Quality ◽  
Potential Ecological Risk ◽  
Oil Refineries ◽  
Quality Guidelines ◽  
Risk Indices ◽  
Guideline Values ◽  
The Impact

Abstract This study aimed at examining the impact of oil pollution from artisanal oil refineries on the Oturuba river ecosystem using active river bottom sediment. Specific objectives included to determine the level of hydrocarbons and trace metals (Pb, Cd, Zn, Cu, Ni, V and Mg) in the sediments and to relate this with general ecosystem health. The study found elevated concentrations of both hydrocarbons and heavy metals in the range above most sediment quality guidelines exceeding the respective Threshold Effects Level and Probable Effects. Level guideline values and occurring at levels where impairment to biological communities is certain an d where toxicity levels can lead to negative impacts on benthic animals or infaunal communities. Heavy metal geochemical accumulation index and potential ecological risk analysis also returned anomalously high concentrations in the range of very highly polluted sediment environments with very high ecological risk indices, thereby ranking the Oturuba Creek as one of the most polluted coastal river systems in the world.

Concentrations and Pollution Assessment of Six Heavy Metals in Quercus aquifolioides Forest Soils

2013 ◽  
Vol 807-809 ◽  
pp. 184-189 ◽  
Author(s):  
Qing Song Yang ◽  
Yan Zhao
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Forest Soils ◽  
Pollution Assessment ◽  
Quality Standard ◽  
Potential Ecological Risk ◽  
Average Concentration ◽  
Pollution Indices ◽  
Risk Indices ◽  
Different Soils

Concentrations characteristics of six heavy metals (Cu, Cr, Cd, Mn, Zn, Pb) in 7 soil sample from different loactions ofQuercus aquifolioidesfrest were investigated. The concentrations and potential ecological risk of heavy metals in the soils was assessed when compared to the background values of heavy metals in three different soils, i.e. total, yellow-brown and yellow soils in China. The average concentration of heavy metals inQuercus aquifolioidessoils was in the order Mn>Cr>Zn>Cu>Pb>Cd, while the average concentrations of all examined heavy metals were lower than those in the Environmental Quality Standard for Soil (grade I) in China. In all examined heavy metals, Mn (474.7mg/kg) had the highest average concentration and Cd (0.039mg/kg) had the lowest one, with variation coefficients ranged 33-87% for the six heavy metals. Correlation analyses showed that the three heavy metals (Cu, Mn and Pb) probably came from the same resources, and so did of Cr and Pb. Comprehensive pollution indices (0.57-1.71) indicated theQuercus aquifolioidessoils were slightly polluted by the six heavy metals and ecological risk indices (8.42-51.0) also show the situation of heavy metals was in the slight level in the soils. Among the examined heavy metals, Cu and Cr were two main heavy metals who making pollution and potential ecological risk to the soils.

scholarly journals Targeting Remediation Dredging by Ecological Risk Assessment of Heavy Metals in Lake Sediment: A Case Study of Shitang Lake, China

2019 ◽  
Vol 11 (24) ◽  
pp. 7251 ◽  
Author(s):  
Zhongya Fan ◽  
Wencai Wang ◽  
Chunyan Tang ◽  
Yiping Li ◽  
Zhong Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Lake Sediment ◽  
Ecological Risk ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Pollution Levels ◽  
High Pollution ◽  
And Migration

Understanding the spatial distribution and pollution characteristics of heavy metals in lake sediment is crucial for studying deposition and migration processes, assessing lake conditions, and determining the extent of remediation dredging. The present work is a case study of heavy metal pollution in Shitang Lake in Anhui province, China. Heavy metal concentrations were determined in sediment at locations across the lake to a depth of 100 cm, and pollution levels were assessed on the basis of the Geoaccumulation Index (Igeo) and Potential Ecological Risk Index (RI). Hg and Cd were the predominant heavy metals in the sediment, and the Igeo and RI indicated high pollution levels in the northern and southern zones of the lake. These findings can be used to guide the prioritization of dredging operations.

scholarly journals Ecological Risk Assessment and Contamination History of Heavy Metals in the Sediments of Chagan Lake, Northeast China

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 894
Author(s):  
Panfeng Liu ◽  
Chaojie Zheng ◽  
Meilan Wen ◽  
Xianrong Luo ◽  
Zhiqiang Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Principal Component Analysis ◽  
Ecological Risk ◽  
Surface Sediment ◽  
Northeast China ◽  
Principal Component ◽  
Potential Ecological Risk ◽  
210Pb Dating ◽  
History Of ◽  
Chagan Lake

The study deals with the spatio-temporal distribution of heavy metals in the sediments of Chagan lake, Northeast China. The pollution history of heavy metals is studied simultaneously through the 210Pb dating method by analyzing the characteristic of As, Hg, Cd, Cr, Ni, Cu, Pb, and Zn concentration-depth profiles. The potential ecological risk index (RI) and geo-accumulation index (Igeo) were used to evaluate the contamination degree. Principal component analysis (PCA), based on the logarithmic transformation and isometric log-ratio (ilr) transformed data, was applied with the aim of identifying the sources of heavy metals. The element concentrations show that the heavy metals are enriched in the surface sediment and sediment core with a varying degree, which is higher in the surficial residue. The results of Igeo indicate that the Cd and Hg in the surface sediment have reached a slightly contaminated level while other elements, uncontaminated. The results of RI show that the study area can be classified as an area with moderate ecological risk in which Cd and Hg mostly contribute to the overall risk. For the sediment core, the 210Pb dating results accurately reflect the sedimentary history over 153 years. From two evaluation indices (RI and Igeo) calculated by element concentration, there is no contamination, and the potential ecological risk is low during this period. The comparative study between raw and ilr transformed data shows that the closure effect of the raw data can be eliminated by ilr transformation. After that, the components obtained by robust principal component analysis (RPCA) are more representative than those obtained by PCA, both based on ilr transformed dataset, after eliminating the influence of outliers. Based on ilr transformed data with RPCA, three primary sources could be inferred: Cr, Ni, As, Zn, and Cu are mainly derived from natural sources; the main source of Cd and Hg are associated with agricultural activities and energy development; as for Pb, it originated from traffic and coal-burning activities, which is consistent with the fact that the development of tourism, fishery, and agriculture industries has led to the continuous increasing levels of anthropogenic Pb in Chagan Lake. The summarized results and conclusions will undoubtedly enhance the governmental awareness of heavy metal pollution and facilitate appropriate pollution control measures in Chagan Lake.

scholarly journals Assessment of Heavy Metal Pollution Levels in Sediments and of Ecological Risk by Quality Indices, Applying a Case Study: The Lower Danube River, Romania

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1801
Author(s):  
Valentina Andreea Calmuc ◽  
Madalina Calmuc ◽  
Maxim Arseni ◽  
Catalina Maria Topa ◽  
Mihaela Timofti ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Surface Sediments ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Danube River ◽  
Pollution Indices

It is a well–known fact that heavy metal pollution in sediments causes serious problems not only in the Danube basin, but also in the large and small adjacent river streams. A suitable method for assessing the level of heavy metals and their toxicity in sediments is the calculation of pollution indices. The present research aims to assess heavy metal pollution in the Lower Danube surface sediments collected along the Danube course (between 180 and 60 km) up to the point where the Danube River flows into the Danube Delta Biosphere Reserve (a United Nations Educational, Scientific and Cultural Organization – UNESCO, protected area). In addition, this monitored area is one of the largest European hydrographic basins. Five heavy metals (Cd, Ni, Zn, Pb, Cu) were analyzed in two different seasons, i.e., the autumn of 2018 and the spring of 2019, using the Inductively Coupled Plasma Mass Spectrometry (ICP– MS) technique. Our assessment of heavy metal pollution revealed two correlated aspects: 1. a determination of the potential risks of heavy metals in sediments by calculating the Potential Ecological Risk Index (RI), and 2. an evaluation of the influence of anthropogenic activities on the level of heavy metal contamination in the surface sediments, using three specific pollution indices, namely, the Geo–Accumulation Index (Igeo), the Contamination Factor (CF), and the Pollution Load Index (PLI). The results of this pioneering research activity in the region highlighted the presence of moderate metal (Ni and Cd) pollution and a low potential ecological risk for the aquatic environment.

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