scholarly journals Distribution characteristics and potential risk assessment of heavy metals in seawater and sediment of Liaodong Bay

2020 ◽  
Vol 206 ◽  
pp. 02004
Author(s):  
Nianting Si ◽  
Liang Qu
Keyword(s):  
Heavy Metals ◽  
Good Condition ◽  
Sediment Quality ◽  
Potential Ecological Risk ◽  
National Guideline ◽  
Liaodong Bay ◽  
Guideline Values ◽  
Contaminant Metals ◽  
Ecological Risk Analysis

Distribution of heavy metals (Hg, Cu, Pb, Zn, Cd and Cr) in the seawater and sediments were studied based on data from two oceanographic surveys carried out in Liaodong Bay in May and October 2016. The results showed that the values of heavy metals in seawater represent a uniform distribution, while no trends were detected for spatial distribution. High values of heavy metals in sediment were generally distributed nearshore areas in October. Concentrations of Pb, Zn, Hg in seawater were higher than the national guideline values of Mar. sediment quality of China. Values of Cu, Zn, Cd and Hg were higher than the national guideline values of Mar. sediment quality of China in October, while quality was in good condition in May. Correlation analysis showed that TOC was mainly contributed for the variations of heavy metals. The potential ecological risk analysis of heavy metals indicates that Hg, Cd and Cu should be listed as the priority contaminant metals in Liaodong Bay.

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.

scholarly journals Year over year comparison of sediment quality in the rivers of Eastern Slovakia

2020 ◽  
Vol 29 (3) ◽  
pp. 289-297
Author(s):  
Eva Singovszka ◽  
Magdalena Balintova
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Risk Index ◽  
Sediment Quality ◽  
Potential Ecological Risk ◽  
Ecological Risk Index ◽  
Potential Ecological Risk Index ◽  
Sediment Samples ◽  
Better Than

Quality is one of the most important risk indicators in river basins. Therefore, monitoring and evaluating water and sediment quality has a very important role in process of risk management. The aim of the monitoring is provide for the sustainability of water bodies and these results are the basis for the risk management in the river catchment area. Hornad, Laborec and Poprad are the rivers in Eastern Slovakia. Hornad and Laborec belongs to basin of Danube and Poprad belongs to basin of Vistula. Sediment sampling was carried out according to ISO 5667-6. Monitoring was carried out in the spring on 2017–2018. The chemical composition of sediments was determined by means of X-ray fluorescence (XRF) using SPECTRO iQ II (Ametek, Germany, 2000). The results of sediment quality evaluated by method PERI revealed that the quality of sediment in 2018 was better than 2017. Results of XRF analysis of sediments were compared with the limited values according to the Slovak Act 188/2003 Coll. of Laws on the application of treated sludge and bottom sediments to fields. It can be state that limit values comparing with Slovak legislation were not exceeding in all sediment samples in rivers in Eastern Slovakia. Based on the monitoring data of sediment quality in the study area, a quantitative analysis of heavy-metal pollution in sediment was conducted using the method of potential ecological risk index (PERI) which is method for evaluate the potential ecological risk of heavy metals. It is based exclusively on chemical parameters of sediments because sediment data show mean integrated values in time, with higher stability than water column parameters; sediments are easily sampled at field work; sediment samples are more representative for time and space scales and analytical data are easily obtained, especially because sediments present high concentrations of contaminants, decreasing the possible errors due to detection limits of the applied analytical method. This method comprehensively considers the synergy, toxic level, concentration of the heavy metals and ecological sensitivity of heavy metals. Potential ecological risk index can be obtained using three basic modules: degree of contamination (CD), toxic-response factor (TR) and potential ecological risk factor (ER). The results show on the basis on potential ecological risk index that the quality of sediment in 2018 is better than 2017. The worst result shows Hornad in 2017. Significant improvement occurred at the sampling point S2 in Hornad in 2018. The best results show Laborec in 2018. The results show on the basis on potential ecological risk index that quality of sediment in 2018 is better than 2017.

scholarly journals DISTRIBUTION AND PREDICTION ON HEAVY METALS POLLUTION LEVEL (Pb, Cd, Cu, Zn, and Ni) IN SEDIMENT IN BANGKA ISLAND WATERS USING LOAD POLLUTION INDEX AND GEOACCUMULATION INDEX

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Fasmi Ahmad
Keyword(s):  
Heavy Metals ◽  
Marine Organism ◽  
Geoaccumulation Index ◽  
Sediment Quality ◽  
Pollution Index ◽  
Pollution Load Index ◽  
Pollution Level ◽  
Pollution Load ◽  
Toxic Heavy Metals ◽  
Guideline Values

<p>Bangka Island is rich in natural resources particularly tin minerals. The increasing of tin mining has elevated various wastes such as tailings, oil, and fuel coming from the sand scraper tin boat. These wastes containing toxic heavy metals may harmful to marine organism. Measurement of Pb, Cd, Cu, Zn, and Ni were carried out in September 2010. The purpose of this research was to predict the pollution degree of Pb, Cd, Cu, Zn, and Ni in sediment using two different methods namely geoaccumulation index (I_geo) and pollution load index (PLI). The samples of sediments were collected at 20 stations using Gravity Core. The content of heavy metals in all samples was determined using Atomic Absorption Spectrophotometer with a mixture of air and acetylene flame. The results showed that there was a different of prediction on sediment pollution level between Load Pollution Index with Geoaccumulation Index. According to Load Pollution Index, sediments in this waters were not polluted by Pb, Cd, Cu, Zn, and Ni (PLI&lt;1). Based on Geoaccumulation Index, sediment were also not polluted by Pb, Cu, Zn, and Ni (Igeo&lt;0). While for Cd, sediments divided into three categories, namely not polluted (Igeo&lt;0), light polluted (0&lt;Igeo&lt;1), and medium pollued (1&lt;Igeo&lt;2).  The concentration of the heavy metals still lower than that sediment quality guideline values.</p> <p>Keywords: Bangka Island, heavy metals, geoaccumulation index, pollution load index.</p>

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.

scholarly journals Sediment Quality Assesment by Using Geochemical Index at Saguling Reservoir West Java Province Indonesia

2018 ◽  
Vol 8 (2) ◽  
pp. 34
Author(s):  
Eka Wardhani ◽  
Suprihanto Notodarmojo ◽  
Dwina Roosmini
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Human Activity ◽  
Ecological Risk ◽  
Sediment Quality ◽  
Dry Season ◽  
Risk Category ◽  
Low Grade ◽  
West Java

Heavy metal pollution is one of the problems that continue to occur in Indonesia which is very important because it is non-degradable, persistent, and can accumulate in the bodies of living things. Heavy metal in the water is usually present in low concentrations but human activity shall increase. Saguling Reservoir is one of the largest manmade lake in West Java Province which has experienced water contamination. The purpose of this study is to assess the quality of sediments related to the pollution of four heavy metals ie Cd, Cr, Cu, and Pb contained in Saguling Reservoir sediment using CF, MPI, Igeo and PERI methods in the rainy and dry seasons.Sediment samples are taken in twelve points around the reservoir by 2015-2017. Based on the results of this study it can be concluded that the sediment quality of Saguling Reservoir has been contaminated by heavy metals Cd, Cr, Cu, and Pb. This is caused by human activity in the water catchment area of the reservoir. Based on the results of the analysis of sediment quality using Igeo and CF the sediment of Saguling Reservoir has been polluted by heavy metals, specifically Cd in the rainy and dry seasons. The result of assessment of sediment quality by MPI method can be concluded that the sediment of Saguling Reservoir as a whole has been contaminated by Cd, Cr, Cu, and Pb. Based on calculations using PERI method, the sediment quality of Saguling Reservoir has contaminated Cd with serious ecological risk category during rainy and dry season, contaminated with Cr and Pb with low grade ecologogical risk category during rainy and dry season, has been contaminated with Cu with low grade ecological risk in the rainy season and moderate ecological risk in the dry season. Based on the results of this study that the Cd must be cautioned carefully, because of the highest concentration in the rainy and dry season than three other heavy metals.

ENVIRONMENT QUALITY OF LIAODONG BAY AND POLLUTION EVOLUTION OF HEAVY METALS

2012 ◽  
Vol 32 (2) ◽  
pp. 21-30 ◽  
Author(s):  
Xianrong ZHANG ◽  
Yong ZHANG ◽  
Qing YE ◽  
Dejiang FAN ◽  
Shipu BI ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Liaodong Bay ◽  
Environment Quality

Heavy metal levels in cassava flour sold in Okura, Ejule and Ojapata of kogi state, Nigeria

2021 ◽  
Vol 19 (3) ◽  
pp. 45-54
Author(s):  
Olubiyo Gloria Taiye ◽  
Yakubu Anita Ohunene ◽  
Olubiyo Comfort Kehinde
Keyword(s):  
Heavy Metals ◽  
Human Exposure ◽  
Cassava Flour ◽  
Low Concentrations ◽  
Zn Concentration ◽  
Guideline Values ◽  
Metal Levels ◽  
Iron And Zinc

Cassava (Manihot esculenta) is a major source of carbohydrate and a staple food cultivated in Nigeria especially in Kogi  State. Determination of heavy metals in cassava flour from major markets:(Okura ,Ejule and Ojapata) in Kogi East was done to ascertain the quality of cassava flour and its human exposure path.Lead, cadmium, iron and zinc contents were determined using Atomic Absorption Spectrophotometer (AAS).The results were analysed using Analysis of Variance (ANOVA), Duncan Multiple Range Test (DMRT) and  Independent Sample t-test. Zn concentration in Ejule (Control) was as low as 0.002±0.000a . Pd,Cd,Fe, and Zn screened were far below the WHO guideline values or permissible limit of metal in food.This implies that the metal toxicants present in the cassava flour is in such low concentrations that render the food non-toxic and edible. Keywords: Heavy metals; pollution; cassava flour; human exposure.

scholarly journals The Study of Heavy Metals on Sediment Quality of Kuala Perlis Coastal Area

2018 ◽  
Vol 34 ◽  
pp. 02018
Author(s):  
A.A. Ahmad Zubir ◽  
F.N. Mohd Saad ◽  
F.A. Dahalan
Keyword(s):  
Heavy Metals ◽  
Coastal Area ◽  
Sediment Quality ◽  
Pollution Load Index ◽  
Pollution Load ◽  
Class 1 ◽  
Accumulation Index ◽  
Geo Accumulation Index ◽  
Roadside Area

The contamination of heavy metals gives bad implications to the aquatic environment. Thus, a study was conducted to assess the sediment quality by using different contamination indices such as Enrichment Factor (EF), Geo-accumulation Index (Igeo), and Pollution Load Index (PLI). Each sediment sample was collected at the surface (0-15cm) at 5 locations based on the land use activity; jetty port (A), seaside restaurant (B), roadside area (C), power plant (D) and residential area (E). All samples were undergoes acid digestion and analyzed with AAS. Four elements identified from the sediment samples which are Cr, Cu, Pb and Zn were used to calculate the respective indices. Results show that, the highest EF value of Pb which categorized as very severe enrichment was at point E. Meanwhile minor enrichment was detected at point B for Cu while Cr and Zn at point A. Based on Igeo value the sediment quality along Kuala Perlis was in the unpolluted-moderately polluted condition (class 1). As for PLI it shows that the sediment of the coastal area is unpolluted (PLI<1). Therefore, this study revealed that, the main contributor of heavy metals in this area is Pb while the sediment quality of Kuala Perlis was in minor pollution condition.

scholarly journals Heavy Metal Loading in Surface Sediments along the Kawere Stream, Tarkwa, Ghana

2020 ◽  
Vol 20 (2) ◽  
pp. 77-85
Author(s):  
S. A. Ndur ◽  
S. Y. Nyarko ◽  
I. Quaicoe ◽  
L. B. Osei
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Anthropogenic Activities ◽  
Risk Index ◽  
Sediment Quality ◽  
Ecological Integrity ◽  
Pollution Assessment ◽  
Well Being ◽  
Potential Ecological Risk

Sediment contamination by heavy metals resulting from anthropogenic activities is increasingly becoming a global concern due to the risk it poses to human well-being and ecological integrity at large. The purpose of this study was to assess the heavy metals loading in sediment along the Kawere stream. Ten sediment samples were collected, acid digested and analysed for copper (Cu), lead (Pb), cadmium (Cd), manganese (Mn), zinc (Zn), nickel (Ni), chromium (Cr), cobalt (Co) and iron (Fe) using a Varian AA240FS Atomic Absorption Spectrometer (AAS). The Australian and New Zealand Environment and Conservation Council (ANZECC) guidelines for freshwater sediment quality was used as the benchmark against which the measured metal concentrations were compared. Nemerow’s pollution and potential ecological risk indices were used to evaluate the pollution status and ecological risk levels of the heavy metals in the stream. The results obtained indicated that, except Cu which exceeded the ANZECC trigger value of 65 mg/kg at three sampling sites (K01=171.29 mg/kg, K05=170.83 mg/kg and K07=113.31 mg/kg), all other measured heavy metals concentrations were below their corresponding ANZECC values. Heavy metal pollution assessment showed that three samples (K01, K05 and K07) were slightly polluted, suggesting the likelihood of posing a health threat to the aquatic organisms and humans. Calculated Ecological Risk Index (RI) ranged from 3.229 to 19.750 (RI < 150), representing a low ecological risk. As such, the metals, Cu, Ni, Cd, Pb, Cr, and Zn pose a low ecological risk to the aquatic ecosystem. Although the ecological risk is low based on the current results, constant monitoring of the stream quality is recommended due to the increasing human activities along the stream as well as the sediments ability to accumulate and remobilise heavy metals back into the water column and possibly transferring them through the food chain.   Keywords: Heavy Metals, Sediment, Ecological Risk Assessment, Pollution, Stream

scholarly journals Hydrochemistry and Quality assessment of Groundwater from Constituency Water Projects, Pategi Local Government Area

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
A. J. Gana
Keyword(s):  
Heavy Metals ◽  
Mineral Dissolution ◽  
Total Hardness ◽  
Biological Parameters ◽  
Mean Values ◽  
Physico Chemical ◽  
Groundwater Samples ◽  
Guideline Values ◽  
Baseline Information

Water is vital for life sustenance hence adequate, safe and accessible supply must be made available to all. The remote village of Tankpaful located in the town of Pategi has recently witnessed the installation of new boreholes to harness groundwater as an improved source of drinking water. However, there is no known information about the quality of these sources. Hence, this paper aims to investigate the quality of groundwater samples from these boreholes in terms of their physico-chemical, heavy metals and biological parameters and also provide baseline information about the nature of the underground aquifer in this community. Groundwater samples (n=20) were obtained from randomly selected boreholes in the study area and examined for their physicochemical, heavy metal and biological parameters following standard procedures recommended by the American Public Health Association and compared to guideline values. Pearson’s correlation test was done to examine the relationship between measured parameters. With the exception of pH (5.58) and total hardness (296.99mg/L), all physico-chemical parameters were within guideline values specified by the WHO and SON. For heavy metals, mean values for Iron (0.32mg/L), Chromium (0.22mg/L) and Nickel (0.4mg/L) were found to exceed the given standard limits as well. The findings revealed that boreholes were mainly acidic which could be of natural origin such as mineral dissolution. Based on correlation analysis, the major mineral groups contributing to total hardness is the K-Cl group (1.00). We recommend that regular monitoring should be done to ensure guideline values are not breached while residents should be educated on the need to maintain these water sources to prevent deterioration.

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