Assessment of Heavy Metal Levels in Sediment of the Xiangjiang River Section Flowing through Changsha

2013 ◽  
Vol 368-370 ◽  
pp. 482-485 ◽  
Author(s):  
Fang Tong Wu ◽  
Hong Yu Zhu ◽  
Juan Guo ◽  
Yan Ni Lei
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
River Sediments ◽  
Potential Ecological Risk ◽  
Pollution Level ◽  
Xiangjiang River ◽  
Metal Levels ◽  
Accumulation Index ◽  
Ecological Risk Evaluation ◽  
Heavy Metals Pollution

In order to assess polluting condition of heavy metals in sediment of the Xiangjiang River Changsha section, the spatial distribution of four heavy metals were determined in river sediments at six sampling stations. Geo-accumulation Index of heavy metals in superficial sediment of the Xiangjiang River Changsha section was in the decreasing order of Cd>Zn>Pb>Cu. On the whole, the pollution level was moderate-high, and the order of four heavy metals pollution lever was noted in the sequence of Liuyang River entrance of Xiangjiang> Juzizhou Bridge >Houzishi Bridge> the Second Xiangjiang River Bridge > Xiangjiang Super Bridge > Xiangjiang Sanchaji Bridge. The Potential Ecological Risk Evaluation showed that heavy metals ecological risk in sediment of the Xiangjiang River Changsha section was very high, Cd was the primary contribution element, followed by Pb.

scholarly journals Assessment of pollution and sources of heavy metals in the sediments of the Shitalakhya river, Bangladesh

2020 ◽  
Vol 8 (1) ◽  
pp. 89 ◽  
Author(s):  
Kalimur Rahman ◽  
Saurav Barua ◽  
Fahim Ahammad ◽  
Md. Akramul Alam
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Risk Index ◽  
River Sediments ◽  
Water Source ◽  
Potential Ecological Risk ◽  
Sources Of Pollution ◽  
Accumulation Index ◽  
Geo Accumulation Index ◽  
Geo Accumulation

The Shitalakya River, located near Dhaka City of Bangladesh, supplies water to the city dwellers and hence it is essential to determine pollu-tion condition, ecological risk and sources of heavy metals in the river sediments. Sediment works as the sink and source of heavy metals in the riverine ecosystem. The samples collected from the ten sites of the Shitalakhya River were investigated in the study. Average concentra-tion of different heavy metals in the sediments are Cu>Zn>Ni>Pb>Cr>Cd. Geo-accumulation index reveals moderately pollute Cu concen-tration, unpolluted to moderately pollute Ni concentration and unpolluted for the rest of the heavy metals. The order of geo-accumulation index are Cu>Ni>Pb>Cd>Zn>Cr. Overall, the heavy metals render low potential ecological risk and the order of potential ecological risk index are Cd>Cu>Ni>Pb>Cr>Zn. Though the concentration of Cd is low in sediment, it poses higher ecological risk. Positive matrix factor-ization (PMF) identifies two sources of pollution, S1 and S2. Where, S1 consists with Cu, Ni, Pb, Zn; which come from industrial wastewater. S2 consists with Cr, Cd, Pb, Zn; which originate from natural sources. The outcomes of the study provide as a reference to plan, control and manage heavy metal pollution and protect the water source of the Shitalakhya River.    

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.

The ecological risk assessment and suggestions on heavy metals in river sediments of Jinan

2017 ◽  
Vol 76 (8) ◽  
pp. 2177-2187 ◽  
Author(s):  
Xu Wang ◽  
Lijun Ren ◽  
Fengchao Jiao ◽  
Wenjie Liu
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Risk Index ◽  
River Sediments ◽  
Principal Component ◽  
Potential Ecological Risk ◽  
Moderate Degree ◽  
Multivariate Statistical ◽  
Ecological Risk Index ◽  
Heavy Metals Pollution

The concentrations of eight heavy metals (Cr, Hg, As, Pb, Cd, Cu, Zn, Ni) in six river sediment samples were collected for evaluation of the degree of the heavy metals pollution distribution and ecological risk of three main rivers' sediments in Jinan. Multivariate statistical techniques were used to determine the most common pollution sources. The results illustrated that all of the metals in Damatou and Xinfengzhuang sections of the Xiaoqing River were much higher than the background value, and the level of potential ecological risk index was very high. The remaining four sections had a low or moderate degree of ecological risk. Principal component analysis (PCA) showed that all metals, with the exception of As, formed the first component explaining 86.85% of the total variance and industry sources could be considered as the first component, while As alone could be the second component, representing agricultural source. The elements Cr and Zn were grouped together while the remaining six metals formed a separate category. Among all heavy metals, Hg and Cd were the most significant contributors to the pollution. Therefore, the prevention of pollution should pay more attention to controlling the sources, especially Hg and Cd.

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.

scholarly journals Geochemistry pollution status and ecotoxicological risk assessment of heavy metals in the Pahang River sediment after the high magnitude of flood event

2020 ◽  
Author(s):  
K. Y. Lim ◽  
N. A. Zakaria ◽  
K. Y. Foo
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
River Sediment ◽  
Risk Index ◽  
River Sediments ◽  
Sediment Quality ◽  
Contamination Factor ◽  
Potential Ecological Risk ◽  
Flood Event ◽  
Pollution Status

Abstract The present work is aimed at assessing the aftermath effects of the 2014 flood tragedy on the distribution, pollution status and ecological risks of the heavy metals deposited in the surface river sediment. A series of environmental pollution indexes, specifically the enrichment factor (EF), geo-accumulation index (Igeo), contamination factor (CF), modified degree of contamination (mCd), pollution load index (PLI), potential ecological risk index (PERI) and sediment quality guidelines (SQGs) have been adopted. Results revealed that the freshly deposited sediments collected soon after the flood event were dominated by Cu, Fe, Pb, Ni, Zn, Cr and Cd, with the average concentrations of 38.74, 16,892, 17.71, 4.65, 29.22, 42.36 and 0.29 mg/kg, respectively. According to the heavy metal pollution indexes, Pahang River sediments were moderately to severely contaminated with Pb, Ni, Cu, Zn and Cr, while Cd with the highest risk of 91.09 was the predominant element that illustrated an aesthetic ecological risk to the water body after the tragic flood event. The findings highlighted a critical deterioration of the heavy metals content, driven by the catastrophic flood event, which has drastically altered their geochemical cycles, sedimentary pollution status and biochemical balance of the river's environment.

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 Assessment of Heavy Metal Pollution and Potential Ecological Risk in Sewage Sludge from Municipal Wastewater Treatment Plant Located in the Most Industrialized Region in Poland—Case Study

2019 ◽  
Vol 16 (13) ◽  
pp. 2430 ◽  
Author(s):  
Malwina Tytła
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Wastewater Treatment ◽  
Risk Factor ◽  
Sewage Sludge ◽  
Ecological Risk ◽  
Treatment Plant ◽  
Potential Ecological Risk ◽  
Pollution Level ◽  
Chemical Forms

This study aimed to assess the pollution and potential ecological risk of seven heavy metals (Cd, Cr, Cu, Hg, Ni, Pb, and Zn) in the sewage sludge collected from a wastewater treatment plant (WWTP), located in the most industrialized region of Poland (Silesian Voivodeship). The concentrations of heavy metals were determined using inductively coupled plasma optical spectrometry (ICP-OES) and cold vapor atomic absorption spectrometry (CVAAS). The chemical forms (chemical speciation) of heavy metals were determined using the three-step chemical sequential extraction procedure, developed by the Community Bureau of Reference (BCR). To assess the pollution level and potential ecological risk, the following indices were used: Geoaccumulation Index (Igeo), Potential Ecological Risk Factor (ER), Individual Contamination Factor (ICF), Risk Assessment Code (RAC), and Ecological Risk Factor (ERF)—the author’s index. Sludge samples were collected at successive stages of processing. The results revealed that the activated sludge process and sludge thickening have a significant impact on heavy metal distribution, while anaerobic digestion and dehydration decrease their mobility. The most dominant metals in the sludge samples were Zn and Cu. However, the content of heavy metals in sewage sludge did not exceed the permissible standards for agricultural purposes. The concentrations of heavy metals bound to the immobile fractions exhibited higher concentrations, compared to those bound to mobile fractions (except Zn). The values of the total indices indicated that sludge samples were moderately to highly contaminated with Zn, Hg, Cd, Cu, and Pb, of which only Hg, Cd, and Cu posed a potential ecological risk, while according to the speciation indices, sludge samples were moderately to very highly polluted with Zn, Cu, Cd, Cr, and Ni, of which Zn, Ni, and Cd were environmentally hazardous. The obtained results proved that assessment of the pollution level and potential ecological risk of heavy metals in sewage sludge requires knowledge on both their total concentrations and their chemical forms. Such an approach will help prevent secondary pollution of soils with heavy metals, which may influence the reduction of health risks associated with the consumption of plants characterized by a high metal content.

Inhibited Degradation of Lambda-Cyhalothrin and Cypermethrin in High Copper Soils

2011 ◽  
Vol 183-185 ◽  
pp. 480-483 ◽  
Author(s):  
Jun Liu ◽  
Cheng Sun ◽  
Ping Ping Li
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Degradation Rate ◽  
Potential Ecological Risk ◽  
Soil Environment ◽  
High Copper ◽  
High Soil ◽  
Lambda Cyhalothrin ◽  
Different Types ◽  
Heavy Metals Pollution

Pesticides and heavy metals pollution in soil environment has become a serious problem in many countries including China. Two different types of soils were used in this study to assess whether high soil Cu concentrations may affect the degradation of Pys. The degradation rate of CPM and -CHT decreased with the addition of Cu to soils, indicating that Cu inhibited the degradation of CPM in soils. The results will provide more information about the potential ecological risk of chemicals on surface and groundwaters.

Assessment on Pollution Level and Ecological Risk of Heavy Metals in Pond Sediment of Suburban District

2013 ◽  
Vol 712-715 ◽  
pp. 498-501
Author(s):  
Hai Min Su
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Potential Ecological Risk ◽  
Anhui Province ◽  
Pollution Level ◽  
Light Pollution ◽  
Geochemical Background ◽  
Suburban District ◽  
Suzhou City

The content of heavy metals Cr, Cu, Zn, As in 15 ponds sediment of suburban district were determined in Suzhou City. The results showed that the contents, except for Cr, all above geochemical background values of Anhui Province. Meanwhile, the index of geoaccumulation and the Lars Hakansons method were used to assess pollution level and potential ecological risk of the heavy metals. The assessment results revealed that Cu was light pollution, and the others were non-pollution. And heavy metal potential ecological indexes from 36.62 to 75.85 were less than 150, which illustrated the potential ecological risk small.

Sign in / Sign up

Export Citation Format

Share Document