scholarly journals Potential ecological risk, in-situ phytoextraction potential of Lycopersicon esculentum, and pollution indices of selected toxic metals in Hausawan - Kaba, Kano State, Nigeria

2021 ◽  
pp. 100113
Author(s):  
Muhammad Ibrahim ◽  
Abigail Clement Young ◽  
Deqiang Chen ◽  
Nafeesa Mughal
Keyword(s):  
Lycopersicon Esculentum ◽  
Ecological Risk ◽  
Toxic Metals ◽  
Potential Ecological Risk ◽  
Pollution Indices ◽  
Phytoextraction Potential

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.

scholarly journals Pollution indices and biotests as useful tools for the evaluation of the degree of soil contamination by trace elements

2021 ◽  
Author(s):  
Jerzy Wieczorek ◽  
Agnieszka Baran
Keyword(s):  
Trace Elements ◽  
Soil Contamination ◽  
Ecological Risk ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Anthropogenic Factors ◽  
Pollution Indices ◽  
Northwestern Part ◽  
Soil Ecotoxicity ◽  
Geochemical Indices

Abstract Purpose The aim of the study was the calculation of geochemical, ecological, and ecotoxicological indices for the assessment of risk resulting from the presence of trace metals in soil. Methods Around 320 soil points were determined for the tests by the regular square-grid method with a square side equal to 7.5 km. A total of 11 indices were used, including 6 geochemical indices, 1 index assessing potential ecological risk, and 4 indices assessing soil ecotoxicity. Results Two groups of elements were distinguished. The first one included Ni, Cr, and Cu. The calculated geochemical indices generally indicated their natural content and low degree of soil contamination with them and that the elements’ sources were connected with natural processes. The second group included Cd, Pb, and Zn. These elements occur in high concentrations in the studied area, which is influenced by both natural and anthropogenic factors. However, contamination with these elements is heterogeneous in the Małopolska and generally observed in its northwestern part. PCA showed that Cd and Pb had the greatest effect on the degree of soil contamination and pose the greatest potential threat to the soil environment. Heterocypris incongruens proved to be a more sensitive indicator of soil ecotoxicity compared to plant tests. The potential ecological risk index and biotests indicated that most of the soil samples had low potential ecological risk and low ecotoxicity. Conclusion The key to the effective assessment of soil contamination with trace elements is the combined use of geochemical, ecological, and ecotoxicological indices, which allows comprehensive monitoring of soil quality.

Changes of toxic metals during biological stabilization and their potential ecological risk assessment

2015 ◽  
Vol 72 (10) ◽  
pp. 1713-1722 ◽  
Author(s):  
Hou-cheng Wang ◽  
Zheng-zhong Zeng ◽  
He-fei Zhang ◽  
Zhong-ren Nan
Keyword(s):  
Toxic Metals ◽  
Contaminated Soil ◽  
Steel Slag ◽  
Toxic Metal ◽  
Potential Ecological Risk ◽  
Ecological Index ◽  
Mn Oxide ◽  
Control Technologies ◽  
The Stability

With various disadvantages of pollution control technologies for toxic metal-contaminated soil, we mixed contaminated soil with sludge for in situ composting to stabilize toxic metals, so plants are enriched to take up the toxic metals. When simulating the above, we added toxic metal solution into sewage sludge, and then composed it with steel slag to determine inhibition of the availability of toxic metals. When toxic metals were added into sludge, the potential ecological index and geoaccumulation index of Cd became high while Zn was low. Steel slag had an inhibited availability of Cd, and when the adjunction of steel slag was 7%, the availability of Cd was lowest. Steel slag promoted the availability of Zn, and when the adjunction of steel slag was 27%, the availability of Zn was highest. Results showed that during composting, with increasing steel slag, Cd stabilizing time was reached sooner but Zn stabilizing time was slower, and the availability of all metals became lower. In the end, composting inhibited the potential ecological index of Cd, but it promoted the potential ecological index of Zn. Steel slag promoted the stability of Cd and Zn as Fe/Mn oxide-bound and residual species. Therefore, composting sludge and steel slag could be used as an effective inhibitor of Zn and Cd pollution.

scholarly journals Eutrophication and sediment–water exchange of total petroleum hydrocarbons and heavy metals of Hashilan wetland, a national heritage in NW Iran

2021 ◽  
Author(s):  
Sajjad Abbasi ◽  
Sara Sheikh Fakhradini ◽  
Neamatollah Jaafarzadeh ◽  
Pooria Ebrahimi ◽  
Shirin Yavar Ashayeri
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Petroleum Hydrocarbons ◽  
Principal Component ◽  
Potential Ecological Risk ◽  
Total Petroleum Hydrocarbons ◽  
Pollution Indices ◽  
Factors Affecting ◽  
Nw Iran

AbstractThe heavy metal(loid)s concentrations in water and sediments were analyzed in the Hashilan wetland to assess the spatial distribution, pollution status, fate, partitioning, and ecological risk and also to identify the heavy metal(loid)s sources in sediments using PMF (Positive Matrix Factorization) and APCs-MLR (absolute principal component score-multiple linear regression) receptor models. According to the pollution indices, (Ni, Cu, Cr, Mo), and (Zn, Cr, and Cu) are considered the most important pollutants in sediments and water, respectively. Ni, Cr, and Cu are the main contributors to ecological risks in sediments of some stations. The potential ecological risk assessment proposed low ecological risk in water of the study area. Higher distribution coefficient (Kp) values of Ni, Cr, Mn, Cu, Co, Pb, As, and Zn indicated the majority of these heavy metals present in the sediments; whereas, the majority of Cd concentration occurs in water. PMF and APCs-MLR results indicated the natural sources were the main factors affecting the concentrations of Ni, Cr, Zn, Al, Co, Fe, Pb, As, Cd and somewhat Cu. Mixed natural and agricultural activities are the main sources of Mo, and somewhat Cu. According to the results, there is low pollution of TPH (total petroleum hydrocarbons) in the sediment samples. Also, phosphate (PO42−) and nitrate (NO3−) concentrations were below the recommended permissible limits at all sampling sites except the S8 station for NO3−.

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.

Pollution and Potential Ecological Risk Assessment of Heavy Metals Around the Active Bukit Mendi Palm Oil Mill Area, Bera Pahang, Malaysia

2022 ◽  
Vol 16 (1) ◽  
pp. 46
Author(s):  
Mohd Zahari Abdullah ◽  
Nur Najiha Abdul Hadi
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Palm Oil ◽  
Metal Content ◽  
Potential Ecological Risk ◽  
Heavy Metal Content ◽  
Pollution Indices ◽  
Icp Oes ◽  
Palm Oil Mill

The study on the impact of palm oil mill processing activities on the environment of Bukit Mendi Palm Oil Mill was conducted by determining the distribution of six heavy metal concentrations Cadmium (Cd), Copper (Cu), Manganese (Mn), Lead (Pb), Iron (Fe) and Zinc (Zn) and the selected pollution indices. This study provided some information on the accumulation of heavy metals in the selected area and served to identify the potential sources contributing to these heavy metals. Soil samples were collected from eight sampling sites around the palm oil mill and analysed for the selected metals using ICP-OES. Three types of pollution indices were used to observe the pollution level of the area, namely Enrichment Factor (EF), potential ecological risk index (PERI), and Contamination Factor (CF) of heavy metal content. The average total concentration of the selected metals was found to increase in the order of Fe, Mn, Zn, Cd, Pb, and Cu. The metal Fe showed the highest metal content, followed by Mn at 1573.00 mg/kg and 154.00 mg/kg, respectively. The values of EF showed that the metal was unevenly distributed throughout the sampling areas, where heavy metal content ranged from minimal to extremely high enrichment. The potential ecological risk ranging from low to severe was observed in this study. The CF values revealed that the area was heavily contaminated with Cd and only slightly contaminated with Pb. The pollution indices determined in this study suggested that the study area was moderately contaminated with metals, and the metal Cd was found to be the only metal potentially posing an ecological risk to the area.Keywords: ICP-OES, palm oil mill, heavy metals, soil pollution, pollution indices

scholarly journals Assessment of toxic metals in water and sediment of Pasur River in Bangladesh

2018 ◽  
Vol 77 (5) ◽  
pp. 1418-1430 ◽  
Author(s):  
Mir Mohammad Ali ◽  
Mohammad Lokman Ali ◽  
Md. Saiful Islam ◽  
Md. Zillur Rahman
Keyword(s):  
Drinking Water ◽  
Ecological Risk ◽  
Toxic Metals ◽  
Contamination Factor ◽  
Potential Ecological Risk ◽  
Pollution Load Index ◽  
Ecological Risks ◽  
Pollution Load ◽  
Water And Sediment ◽  
Safe Limits

Abstract This study was conducted to assess the levels of toxic metals like arsenic (As), chromium (Cr), cadmium (Cd), and lead (Pb) in water and sediments of the Pasur River in Bangladesh. The ranges of Cr, As, Cd, Pb in water were 25.76–77.39, 2.76–16.73, 0.42–2.98 and 12.69–42.67 μg/L and in sediments were 20.67–83.70, 3.15–19.97, 0.39–3.17 and 7.34–55.32 mg/kg. The level of studied metals in water samples exceeded the safe limits of drinking water, indicating that water from this river is not safe for drinking and cooking. Certain indices, including pollution load index (PLI) and contamination factor (Cif) were used to assess the ecological risk. The PLI indicated progressive deterioration of sediments by the studied metals. Potential ecological risks of metals in sediment indicated low to considerable risk. However, the Cif values of Cd ranged from 0.86 to 8.37 revealed that the examined sediments were strongly impacted by Cd. Considering the severity of potential ecological risk (PER) for single metal (Eir), the descending order of contaminants was Cd > Pb > As > Cr. According the results, some treatment scheme must formulate and implement by the researchers and related management organizations to save the Pasur River from metals contamination.

scholarly journals Ecological Risk Assessment of Heavy Metals Contamination in Lower Klang River

2021 ◽  
Vol 920 (1) ◽  
pp. 012023
Author(s):  
M A Sefie ◽  
I N Mohamad ◽  
F Baharudin ◽  
J Kassim
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
River Estuary ◽  
Contamination Factor ◽  
Heavy Metal Concentration ◽  
Potential Ecological Risk ◽  
Pollution Load Index ◽  
Pollution Indices ◽  
Pollution Load ◽  
Risk Levels

Abstract Estuarine and coastal environments are known to be major sinks for heavy metals. This ecosystem and its sustainability should be secured using the ecological as indicators. This study is conducted to quantify the heavy metal concentration and to assess the potential ecological risk levels of heavy metals in the sediments from Klang River Estuary. Three typical heavy metals such as cadmium (Cd), lead (Pb) and zinc (Zn) were identified. The surface sediment samples were collected from three sampling stations. The concentration of heavy metals in the sediments were arrange in a decreasing sequence of Pb > Zn > Cd. A range of pollution indicators based on single pollution indices such as Contamination Factor, Contamination Degree, Pollution Load Index and Geoaccumulation Index were considered for ecological risk analysis. In conclusion, the ecological risk levels of heavy metals in the sediments from Lower Klang River were low and unpolluted. However, an overall assessment regarding to the heavy metals’ concentrations, spatial distribution and their potential sources need to be monitored for a better understanding of the water-sediment interaction.

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