Evaluation of ecological risk and primary empirical research on heavy metals in polluted soil over Xiaoqinling gold mining region, Shaanxi, China

Abstract A comprehensive study was conducted to explore the concentration and distribution of heavy metals in farm soils and river sediments around a gold mining area in Fiji with particular emphasis on ecological and human health risks. Representative samples were acquired from farm sites in Matanagata Village and the Nasivi river, both situated around the Vatukoula gold mine limited (VGML), the largest operational gold mine in Fiji. Following aqua regia digestion and analysis by AAS, the average soil concentrations for Cu (110.4 mg kg–1), Cr (136.2 mg kg–1) and Cd (1.7 mg kg–1), and sediment concentrations for Pb (69.31 mg kg–1), Cd (1.82 mg kg–1), Cu (88.95 mg kg–1) and Cr (143.12 mg kg–1) were found to exceed the recommended guideline values. Based on the geo–accumulation index (Igeo) and enrichments factor (EF), the farm soils were moderately contaminated with Cd while the and sediments showed moderate to significant contamination with Pb, Ni and Cr. Ecological risk assessment confirmed moderate to considerable ecological risk in the metal–contaminated samples, with Cd and Pb generally presenting greater risk compared to other metals. Multivariate analyses including principal component analysis pointed to gold mining activities as a potential source for heavy metals in the area. Furthermore, human health risk assessment (HRA) indicated that while adults faced no significant carcinogenic or non–carcinogenic risks from metal exposure (HI < 1), children were at more risk from Co, Mn, Cr and Fe exposure, as well as potential carcinogenic risk from Cd (ILCR = 1.46E–04).

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Health and ecological risk assessment of heavy metals pollution in an antimony mining region: a case study from South China

Environmental Science and Pollution Research ◽

10.1007/s11356-017-0310-x ◽

2017 ◽

Vol 24 (35) ◽

pp. 27573-27586 ◽

Cited By ~ 44

Author(s):

Jiang-Chi Fei ◽

Xiao-Bo Min ◽

Zhen-Xing Wang ◽

Zhi-hua Pang ◽

Yan-Jie Liang ◽

...

Keyword(s):

Heavy Metals ◽

Risk Assessment ◽

Ecological Risk ◽

South China ◽

Ecological Risk Assessment ◽

Mining Region ◽

Metals Pollution ◽

Heavy Metals Pollution

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Applications of Bentonite to Soil Decontamination

Revista de Chimie ◽

10.37358/rc.18.7.6397 ◽

2018 ◽

Vol 69 (7) ◽

pp. 1695-1698

Author(s):

Marin Rusanescu ◽

Carmen Otilia Rusanescu ◽

Gheorghe Voicu ◽

Mihaela Begea

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Laboratory Experiments ◽

Experimental Studies ◽

Heavy Metal Concentration ◽

Polluted Soil ◽

Raw Material ◽

Soil Decontamination ◽

Metal Retention ◽

Removal Of Heavy Metals

A calcium bentonite from Orasu Nou deposit (Satu Mare Romania) was used as raw material. We have conducted laboratory experiments to determine the influence of bentonite on the degree of heavy metal retention. It has been observed that the rate of retention increases as the heavy metal concentration decreases. Experimental studies have been carried out on metal retention ( Zn) in bentonite. In this paper, we realized laboratory experiments for determining the influence of metal (Zn) on the growth and development of two types of plants (Pelargonium domesticum and Kalanchoe) and the effect of bentonite on the absorption of pollutants. These flowers were planted in unpolluted soil, in heavy metal polluted soil and in heavy metal polluted soil to which bentonite was added to observe the positive effect of bentonite. It has been noticed that the flowers planted in unpolluted soil and polluted with heavy metals to which bentonite has been added, the flowers have flourished, the leaves are still green and the plants whose soils have been polluted with heavy metals began to dry after 6 days, three weeks have yellowish leaves and flowers have dried. Experiments have demonstrated the essential role of bentonite for the removal of heavy metals polluted soil.

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A brief Survey of Assessment models to Predict stress Level of Heavy Metals in Soils

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2352096513999201116214345 ◽

2020 ◽

Vol 13 ◽

Author(s):

Sangeetha Annam ◽

Anshu Singla

Keyword(s):

Economic Growth ◽

Heavy Metals ◽

Heavy Metal ◽

Ecological Risk ◽

Stress Level ◽

Metal Contamination ◽

Heavy Metal Contamination ◽

Human Life ◽

High Stress ◽

Heavy Metal Stress

Abstract: Soil is a major and important natural resource, which not only supports human life but also furnish commodities for ecological and economic growth. Ecological risk has posed a serious threat to the ecosystem by the degradation of soil. The high-stress level of heavy metals like chromium, copper, cadmium, etc. produce ecological risks which include: decrease in the fertility of the soil; reduction in crop yield & degradation of metabolism of living beings, and hence ecological health. The ecological risk associated, demands the assessment of heavy metal stress levels in soils. As the rate of stress level of heavy metals is exponentially increasing in recent times, it is apparent to assess or predict heavy metal contamination in soil. The assessment will help the concerned authorities to take corrective as well as preventive measures to enhance the ecological and hence economic growth. This study reviews the efficient assessment models to predict soil heavy metal contamination.

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Migration of Heavy Metals from Polluted Soil to Plants and Lichens under Conditions of Field Experiment on the Kola Peninsula

Russian Journal of Ecology ◽

10.1134/s1067413620060053 ◽

2020 ◽

Vol 51 (6) ◽

pp. 528-540

Author(s):

I. V. Lyanguzova ◽

M. S. Bondarenko ◽

A. I. Belyaeva ◽

M. N. Kataeva ◽

V. Sh. Barkan ◽

...

Keyword(s):

Heavy Metals ◽

Field Experiment ◽

Kola Peninsula ◽

Polluted Soil

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Bioremediation of polluted soil due to tsunami by using recycled waste glass

Scientific Reports ◽

10.1038/s41598-021-93806-4 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

M. Azizul Moqsud

Keyword(s):

Heavy Metals ◽

Electrical Conductivity ◽

Laboratory Experiments ◽

Saline Soil ◽

Salt Content ◽

Tohoku Earthquake ◽

Polluted Soil ◽

Waste Glass ◽

Excess Cost ◽

Recycled Waste

AbstractIn this research, bioremediation of tsunami-affected polluted soil has been conducted by using collective microorganisms and recycled waste glass. The Tohoku earthquake, which was a mega earthquake in Japan triggered a huge tsunami on March 11th, 2011 that caused immeasurable damage to the geo-environmental conditions by polluting the soil with heavy metals and excessive salt content. Traditional methods to clean this polluted soil was not possible due to the excess cost and efforts. Laboratory experiments were conducted to examine the capability of bioremediation of saline soil by using recycled waste glass. Different collective microorganisms which were incubated inside the laboratory were used. The electrical conductivity (EC) was measured at different specified depths. It was noticed that the electrical conductivity decreased with the assist of the microbial metabolisms significantly. Collective microorganisms (CM2) were the highly capable to reduce salinity (up to 75%) while using recycled waste glass as their habitat.

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Ecological risk assessment of heavy metals in farmland soils in Beijing by three improved risk assessment methods

Environmental Science and Pollution Research ◽

10.1007/s11356-021-14695-8 ◽

2021 ◽

Author(s):

Rui Chen ◽

Xuying Cai ◽

Guoyu Ding ◽

Fumin Ren ◽

Qi Wang ◽

...

Keyword(s):

Heavy Metals ◽

Risk Assessment ◽

Ecological Risk ◽

Ecological Risk Assessment ◽

Assessment Methods ◽

Farmland Soils

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Assessment of heavy metal pollution in soil and bottom sediment of Upper Egypt: comparison study

Bulletin of the National Research Centre ◽

10.1186/s42269-019-0233-4 ◽

2019 ◽

Vol 43 (1) ◽

Author(s):

Esmat Ahmed Abou El-Anwar

Keyword(s):

Heavy Metals ◽

Ecological Risk ◽

Nitrogen Fertilizer ◽

Toxic Waste ◽

Anthropogenic Source ◽

Pollution Indices ◽

Upper Egypt ◽

Pulp Paper ◽

Heavy Metals Pollution ◽

Cultivated Soils

Abstract Background Aswan and Luxor Governorates are characterized by multifaceted activities such as cement, chemicals, fertilizers, detergents, nitrogen fertilizer factory at Aswan, the sugar and diary factory at Kom Ombo, and several other factories such as the sugar, pulp, paper, ferrosilicon, and phosphate factories at Edfu, urbanization and agriculture. In addition, there is a main sewage station which is used for irrigation of many crops. Assessing the pollution of soil and sediment with some heavy metals in these areas is the main aim of the current work. Results The average heavy metals content in the studied cultivated soils and Nile sediments are above the acceptable levels. Generally, Nile sediments and cultivated soils at Aswan and Luxor were unpolluted to moderately polluted with heavy metals. Pollution indices indicated that the studied Nile sediments were at considerably ecological risk from Cd (Er = 138.89) and Zn (Er = 140.52). In contrast, the cultivated soil was at very high ecological risk from Cd (Er = 295.24). Conclusions The current research revealed that the soil and sediments in the Upper Egypt are less polluted than Lower Egypt. Thus, the concentrations of toxic elements are increased from south to north direction in Egypt along the Nile River. The sources of the toxic metals may possibly be natural or anthropogenic in the studied area. The anthropogenic source is resulting from paper, pulp, ferrosilicon factories, and phosphate mining at Edfu. In addition, there are some polluting industries such as sand quarry, shale mining, and the nitrogen fertilizer factory at Aswan. On the other hand, the natural sources of toxic waste are the drains during the seasonal flash floods.

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