scholarly journals Distribution and Ecologica Risk of Sediment Heavy Metals in the Water-Level-Fluctuation Zone of the Shawan River Section of Yelang Lake

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Xiaojuan Zhang ◽  
Yutao Zhang
Keyword(s):  
Heavy Metals ◽  
Grain Size ◽  
Ecological Risk ◽  
Risk Index ◽  
Size Composition ◽  
Potential Ecological Risk ◽  
River Section ◽  
Ecological Risk Index ◽  
Sediment Content ◽  
Water Level Fluctuation Zone

With the aim of revealing the potential ecological risk and distribution characteristics of heavy metals on the surface sediment at the Shawan River section of Yelang Lake, the following three analyses were first performed: (1) analysis of grain-size composition on sediment samples collected at seven different sites in the water-level-fluctuation zone (WLFZ); (2) analysis of bulk sediment content of six heavy metals, namely, Cd, Cr, Pb, Mn, Zn, and Cu; and (3) the correlation analysis of grain-size composition and heavy metal content in the sediment. Afterwards, the approach of Hakanson potential ecological risk index was employed to analyze the risk of heavy metal pollution in sediments of seven WLFZ plots. The outcomes indicate that (1) the mean sediment grain size at each sampling site was generally >0.063 mm, with gravel grains (>1 mm) and sand grains (0.22–1 mm) accounting for the largest proportions; (2) the site-averaged mean sediment content of each of the six heavy metals was significantly higher than their respective geochemical background contents in the sediment of Guizhou Province, and the grain-size dependence of the bulk sediment content of heavy metals was not significant; (3) the distribution of Cr was relatively independent of other metals, which was in contrast to notable positive correlations observed between other metals; and (4) in accordance with the approach of Hakanson potential ecological risk index, for these heavy metals, their potential ecological risk reduced by the order of Zn < Cr < Cu < Pb < Cd, with Cd having a mean potential risk index (Ei) of 566.13, suggestive of a very high level of potential ecological risk, Zn, Cr, and Cu having a mild potential ecological risk, and Pb having moderate potential ecological risk. Cd largely contributes to the comprehensive ecological risk index RI is the largest, thereby having important environmental implications.

Distribution and Contamination Acessment of Heavy Metals in Sediments of Harbin Section of Songhua River, China

2014 ◽  
Vol 955-959 ◽  
pp. 2280-2284
Author(s):  
Kai Yue Gong ◽  
Pei Shi Qi ◽  
Yun Zhi Liu
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Risk Level ◽  
Index Method ◽  
Songhua River ◽  
Ecological Risk Index ◽  
Risk Levels ◽  
Accumulation Index

In this study, the distribution and enrichment characters of heavy metals were explored. And the potential ecological risk levels of heavy metals were evaluated by geo-accumulation index method and potential ecological risk index method. The concentrations of heavy metals in sediments of Harbin section of Songhua River are: Zn>Pb>Cr>Cu>Ni>Cd. The enrichment degree of Zn is the highest, while Cd is the lowest. The potential ecological risk indexes of heavy metals in the sediments of section of Songhua River in Harbin are: Cd>Pb>Cu>Zn>Ni>Cr. The main heavy metals pollution is Cd, which has low content but considerable potential ecological risk and contributes most to RI. The ecological risk level of heavy metals in the sediments of the section of Songhua River in Harbin is moderate.

Evaluation of Ecological Risk on Soil Heavy Metals Pollution of Qingyuan

2012 ◽  
Vol 610-613 ◽  
pp. 928-931 ◽  
Author(s):  
Hui Min Zhang ◽  
Hui Zhang ◽  
Ai Min Song ◽  
Jian Qiao Qin ◽  
Ming Wei Song
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Average Concentration ◽  
Single Element ◽  
Index Method ◽  
Ecological Risk Index ◽  
Heavy Metals Pollution

This paper was seleced Qingyuan as a case study, in order to analyze Hg, As, Cu, Zn, Pb, Cd, Ni, Cr concentrations of the soil samples. And used the Hakanson potential ecological risk index method to assess the potential ecological risks of concentrations of heavy metals in soil. The results shows that the average concentration of Hg, As, Cu, Zn, Pb, Cd, Ni, Cr in soil is 6.45, 0.26, 20.25, 119.11, 181.67, 189.22, 0.27, 32.92, 201.35 mg•kg-1 respectively. The rank by severity of ecological risk as Hg > Cu > Pb > As > Cr > Cd > Ni > Zn, based on their single-element indexes. Heavy metals in several samples of the soil have posed a serious threat on the ecosystem.

scholarly journals Ecological Risk Assessment of Heavy Metals in Soil of Lagos State University, Epe, Lagos State, Nigeria

2021 ◽  
pp. 52-58
Author(s):  
L. Salami ◽  
J. G. Akinbomi ◽  
R. J. Patinvoh
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Risk Index ◽  
Control Sample ◽  
Potential Ecological Risk ◽  
Soil Samples ◽  
State University ◽  
Ecological Risk Index ◽  
Sampling Locations ◽  
Lagos State

Soil contaminated with heavy metals poses an ecological risk especially to public health. The aim of this work is to assess the ecological risk of heavy metals in soil of Lagos State University (LASU), Epe, Lagos State, Nigeria. Soil samples were collected from 8 different points in LASU which were stored in various polythene bags labeled SS1 – SS8. A control sample was taken 1 km away from LASU and was labeled SC9. All the sampling locations were identified using handheld Global Positioning System (GPS) for the purpose of universal identification. The soil samples were analysed for nickel (Ni), lead (Pb), copper (Cu), Zinc (Zn), chromium (Cr), cadmium (Cd) and Iron (Fe) using Atomic Absorption Spectrophotometer. Enrichment factor (EF), potential ecological risk (Ei) and ecological risk index (RI) were carried out using the data from the analysis. The results revealed that all the EF values were less than 2 except that of lead in SS1. The Ei values were less than 40 except that of lead in SS1. Moreover RI values of all the soil samples investigated were less than 150. It was obvious from this work that the soil of LASU, Epe, Lagos State, were not enriched with heavy metals and have a low potential ecological risk.

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 Investigation of heavy metals concentration in soil around a Pb-Zn mine and ecological risk assessment

2019 ◽  
Vol 6 (3) ◽  
pp. 151-156 ◽  
Author(s):  
Amir Hossein Baghaie ◽  
Forough Aghili
Keyword(s):  
Heavy Metals ◽  
Soil Pollution ◽  
Ecological Risk ◽  
Agricultural Land ◽  
Agricultural Soils ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Pollution Level ◽  
Ecological Risk Index ◽  
Accumulation Index

Background: Soil pollution with heavy metals seriously threatens soil quality, food safety, and humanhealth. This study was conducted to determine the soil pollution level and ecological risk assessmentof different heavy metals in agricultural soils around Nakhlak Pb-Zn mine, located in Anarak district,Nain county of Isfahan province.Methods: A total of 50 soil samples were collected from agricultural land around Nakhlak mine andanalyzed to determine the concentrations of Pb, Cd, Zn, Ni, Cu, and Mn. The geo-accumulation index(Igeo), enrichment factor (EF), and potential ecological-risk index (Er) were used to assess the level ofsoil pollution with heavy metals.Results: The mean concentrations of Pb, Cd, Zn, Ni, Cu, and Mn were 355, 2.72, 347, 26, 36, and505 mg/kg, respectively, which were higher than the background values of world soils. Based on theIgeo index, the study area was moderately to heavily contaminated with Pb and Zn, uncontaminated tomoderate contaminated with Cd and Cu, and uncontaminated with Mn and Ni. According to the EFvalues, the study soil was moderately contaminated with Mn, Ni, and Cu, significantly contaminatedwith Cd and Zn, and highly enriched with Pb. The RI values showed a moderate level of heavy metalscontamination in the study soil.Conclusion: According to the results, the ecological risk of heavy metals for ecosystem in agriculturallands around Nakhlak Pb-Zn mine is moderate. However, the contamination status should be consideredperiodically.

scholarly journals Pollution, Ecological Risk and Source Identification of Heavy Metals in Sediments from the Huafei River in the Eastern Suburbso Kaifeng, China

2021 ◽  
Author(s):  
Bingyan Jin ◽  
Jinling Wang ◽  
Wei Lou ◽  
Liren Wang ◽  
Jinlong Xu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Metal Pollution ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Ecological Risk Index ◽  
Industrial Activities ◽  
Geo Accumulation

Abstract Rivers in urban environments are significant components of their ecosystems but remain under threat of pollution from unchecked discharges of industrial sewage and domestic wastewater. Such river pollution, particularly over the longer term involving heavy metals, is an issue of worldwide concern regarding risks to the ecological environment and human health. In this study, we investigate the long-term pollution characteristics of the Huafei River, an important urban river in Kaifeng, China. River sedimentary samples were analyzed, assessing the degree and ecological risk of heavy metal pollution using the geo-accumulation index and potential ecological risk index methods; whilst Pearson’s correlation, principal component, and cluster analyses were used to identify the sources of pollution. The results show that heavy metal concentrations are significantly higher than their corresponding fluvo-aquic soil background values in China, and the geo-accumulation indexes indicate, that of the 8 heavy metals identified, Hg is most prevalent, followed in sequence by Cd > Zn > Cu > Pb > Ni > As > Cr. The potential ecological risk index of the Huafei river is very high, with the potential ecological risk intensity highest in the midstream and downstream sections where it is recommended that pollution control is carried out, especially concerning Hg and Cd. Long-term sequence analysis indicates that Cu and Pb dropped sharply from 1998 to 2017, but rebounded in 2019, and that Zn shows a continuous decreasing trend. Four main sources for the heavy metal contaminants were identified: Cr, Cu, Ni, Pb, Zn and Hg derived mainly from industrial activities, traffic sources and natural sources; Cd originated mainly from industrial and agricultural activities; whilst As was mainly associated with industrial activities. It is anticipated that the findings of this study will provide theoretical references for the effective control and scientific management of heavy metal pollution in the Huafei River and its surrounding areas.

scholarly journals Source Identification, Ecological Risk and Spatial Analysis of Heavy Metals Contamination in Agricultural Soils of Tanjaro Area, Kurdistan Region, Iraq

2021 ◽  
Vol 5 (2) ◽  
pp. 18-27
Author(s):  
Hayder Issa ◽  
Azad Alshatteri
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Risk Index ◽  
Pollution Index ◽  
Potential Ecological Risk ◽  
Soil Samples ◽  
Anthropogenic Sources ◽  
Emission Spectrometry ◽  
Kurdistan Region ◽  
Ecological Risk Index

The current work accomplished a comprehensive evaluation of heavy metals pollution in soil of agricultural areas from Tanjaro sub-district, Sulaimaniyah province, Kurdistan Region, NE Iraq. Ninety soil samples were collected from thirty different locations. Concentrations of 16 heavy metals were measured by inductively coupled plasma optical emission spectrometry ICP-OES. The pollution index (PI), potential ecological risk index (Er), enrichment factor (EF), and ecological risk index (RI) were used to assess the pollution in soil samples. High levels of Li and Ni, and moderate Ba, Cd, Hg, and Pb according to the results of concentration analysis, pollution index (PI), and potential ecological risk (ERI). High levels of Cd and Hg according to the results of Er. Agglomerative hierarchical clustering (AHC) and principal component analysis (PCA) suggested that heavy metals were generated from different natural and anthropogenic sources like natural weathering, fertilizer application, and transportation. Origins of Hg, Cd, Ni, and Pb are probably from activities like overuse of pesticides and fertilizers, whereas Pb could be exhausted from vehicle exhausts as well. Furthermore, spatial distributions revealed nonpoint source pollution for the studied heavy metals. The obtained results help in the remediation techniques of contaminated soils such as dilution with decontaminated soil or extraction or separation of heavy metals.

The Contamination Status of Heavy Metal in the Sediment of Beng River and the Protection for the Ecological Safety Engineering

2013 ◽  
Vol 726-731 ◽  
pp. 1809-1812
Author(s):  
Ji Cai Qiu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
River Sediment ◽  
Risk Index ◽  
Pollution Index ◽  
Potential Ecological Risk ◽  
Sediment Pollution ◽  
Ecological Risk Index ◽  
Rubber Dam

To find out the heavy metal pollution condition from the Beng River sediment, we see the region from Beng River Rubber Dam to the Yimeng Road Bridge as research object.We monitored and surveyed on the three kinds of metal components (Cu, Zn, Cd) in the sediments from eight sectionsthe. With reference to the relevant domestic standards, we established sediment pollution evaluation criteria suitable for the region., We conducted the evaluation of ecological risk and pollution levels with the detection results by standard index of the potential ecological risk index and Nemerow France France. The results showed that: the heavy metals ecological risk index in Sediment from Beng River Rubber Dam to the Yimeng Road bridge section, Nemerow pollution index was 6.95, It was heavily polluted. This showed that the heavy metals in river sediment pollution was very serious.

scholarly journals Pollution Characteristics and Ecological Risk Assessment of Heavy Metals in Sediments of the Three Gorges Reservoir

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1798
Author(s):  
Lujie Shui ◽  
Xiaojie Pan ◽  
Xiaojuan Chen ◽  
Fengyi Chang ◽  
Duanji Wan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Cluster Analysis ◽  
Ecological Risk ◽  
Three Gorges Reservoir ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Three Gorges ◽  
Ecological Risk Index ◽  
The Three Gorges

In order to understand the spatial distribution and ecological risk of heavy metal pollution in the sediments of the Three Gorges Reservoir, surface sediment samples in six typical tributaries and estuaries were analyzed. The heavy metal content in sediment was detected by ICP-MS (PE Elan DRC Ⅱ, PerkinElmer, Waltham, MA, USA) after digestion by mixed acid. The data were evaluated and analyzed using multiple methods, including the potential ecological risk index, the geoaccumulation index (Igeo), and cluster analysis. The results show that the tributary surface sediments were polluted by heavy metals to a certain extent. Cu, Zn, Pb, and Cr have been enriched in sediments in recent years. The results of Igeo show that the pollution degree is as follows: Pb > Cu > Zn > Cr > Cd > Ni > As > Hg. According to the potential ecological risk index, the grades of Yunyang, Xiaojiang, and Xinjin are all medium risk, and Cd has the highest contribution rate. Combined with field investigation data, cluster analysis, and correlation analysis, we conclude that Cu, Zn, and Cr are likely to come from agricultural chemical fertilizers and industrial sewage, while Pb mainly comes from the discharge of ship fuel.

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