Migration and speciation of heavy metal in salinized mine tailings affected by iron mining

2017 ◽  
Vol 76 (7) ◽  
pp. 1867-1874 ◽  
Author(s):  
Xu Zhang ◽  
Huanhuan Yang ◽  
Zhaojie Cui
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Mine Tailings ◽  
Metal Speciation ◽  
Transformation Process ◽  
Laboratory Research ◽  
Human Beings ◽  
Negative Effects ◽  
Field Investigations ◽  
Close Relationship

The negative effects of heavy metals have aroused much attention due to their high toxicity to human beings. Migration and transformation trend of heavy metals have a close relationship with soil safety. Researching on migration and transformation of heavy metals in tailings can provide a reliable basis for pollution management and ecosystem restoration. Heavy metal speciation plays an important role in risk assessment. We chose Anshan tailings for our study, including field investigations and laboratory research. Four typical heavy metal elements of mine tailings {Fe (373.89 g/kg), Mn (2,303.80 mg/kg), Pb (40.99 mg/kg) and Cr (199.92 mg/kg)} were studied via Tessier test in vertical and horizontal direction. The main speciation of heavy metals in Anshan tailings was the residual. However, heavy metals have a strong ability for migration and transformation in vertical and horizontal directions. Its tendency to change from stable to unstable speciation results in increasing bioavailability and potential bioavailability. Fe, Mn, Pb and Cr showed different ability in the migration and transformation process (Mn > Pb > Fe > Cr) depending on the characteristics of heavy metals and physicochemical properties of the environment.

Analysis of Heavy Metal in Water used for Irrigation, Soil and Some Vegetables grown around Tin Mine Areas of Heipang District, Barkin-Ladi Local Government of Plateau State

2019 ◽  
pp. 111-119
Author(s):  
Agustina Onyebuchi Ijeomah ◽  
Rebecca Ngoholve Vesuwe ◽  
Bitrus Pam
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Food Safety ◽  
Safety Concern ◽  
Human Beings ◽  
Green Beans ◽  
Green Pepper ◽  
Transfer Factors ◽  
Mining Areas ◽  
Plateau State

Vegetables growing in mining areas have become a serious food safety concern because of the high levels of heavy metals always associated with mining. In this study, water used for irrigation, soil, cabbage, green pepper and green beans grown in tin mine areas of Heipang District, Barkin-Ladi LGA of Plateau State were analyzed for lead, cadmium and zinc, using Atomic Absorption Spectrophotometer (AAS). The concentrations of the heavy metals in water, soil, vegetables were all in the order Pb, >> Cd > Zn. In the vegetables, the order was: Pb → cabbage > green beans > green pepper; Cd → green beans > cabbage > green pepper; Zn → cabbage > green pepper = green beans. The transfer factors for all the metals (heavy metal in plant / heavy metal in soil) ranged from 0.95 to 1.48. There were high levels of Pb and Cd in all the vegetables, which may be attributed to the metals in the water used for irrigation. Whilst the concentration of Zn in all the samples were lower than recommended limits, the levels of Pb and Cd in the water, soil and vegetables were higher than the WHO/FEPA standard recommended limits reported for vegetables. The Cd concentrations of the vegetables also exceeded the tolerance thresholds for animals and human beings and therefore consumption of vegetable from the area would endanger the health of the population.

Heavy metal speciation in waters, sediments and biota from Lake Macquarie, New South Wales

1987 ◽  
Vol 38 (5) ◽  
pp. 591 ◽  
Author(s):  
GE Batley
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Surface Sediments ◽  
Metal Speciation ◽  
New South ◽  
New South Wales ◽  
Contaminated Sediments ◽  
Zinc Smelter ◽  
South Wales ◽  
Lead Zinc

The distribution and bioavailability of heavy metals in waters and sediments from Lake Macquarie (N.S.W.) have been examined. Elevated concentrations of zinc, lead, cadmium and copper detected in surface sediments and waters from the northern end of the lake are attributable to discharges from a lead-zinc smelter on Cockle Creek. The majority of the metals are in bioavailable forms and are shown to be accumulated in seagrasses, seaweeds and bivalves. Calculations indicate that, at the current rates of discharge, the concentrations of bioavailable metals in newly-deposited sediments should not be deleterious. Elutriate tests showed that there will be no significant mobilization of metals during dredging operations to remove the contaminated sediments.

scholarly journals Assessment of heavy metal’s in Atlantic sea fish sold in Benin

2020 ◽  
Vol 14 (5) ◽  
pp. 1853-1861
Author(s):  
Elisabeth Yehouenou Azehoun Pazou ◽  
Judicaël Azehoun Pazou ◽  
Mahoudjro Roméo Adamou
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Human Health ◽  
Fish Species ◽  
Health Impact ◽  
Atomic Absorption Spectrophotometry ◽  
Negative Effects ◽  
Fresh Fish ◽  
Sources Of Pollution ◽  
Metal Levels

Marine space is constantly threatened by various sources of pollution that may reduce its economic potential and have negative repercussions on human health. This study aims to assess heavy metals contamination of eight fish species and their impact on human health. Heavy metals such as cadmium, lead, copper and zinc were determined by atomic absorption spectrophotometry in fresh, cooked and fried fish. The results found in fresh fish (cadmium: 0.002 to 0.005 mg / kg, lead: 0 to 0.031 mg / kg, copper: 0.0045 to 0.305 mg / kg, zinc: 0.1245 to 0.6195 mg / kg), in cooked fish (cadmium: 0.0035 to 0.005 mg / kg, lead: 0 to 0.01 mg / kg, copper: 0 to 0.021 mg / kg, zinc: 0.171 to 0.327 mg / kg) and in fried fish (cadmium: 0.004 mg / kg, lead: 0 to 0.007 mg / kg, copper: 0 to 0.016 mg / kg, zinc: 0.0875 to 0.5065 mg / kg) showed that heavy metal levels are all below the standard values accepted by FAO / WHO. The consumption of these fish could therefore have no negative effect on the population’s health. Both types of cooking have both positive and negative effects on the heavy metal reduction in fish species. Although the concentrations of heavy metals are not worrying, the vigilance of the populations and a variation of the diet are important to guarantee a better health.Keywords: Heavy metals, health impact, Atlantic see fish, Cotonou.

scholarly journals The Use of Biochar of High Growth Rate Plants to Agriculturally Remediate Heavy Metal Polluted Acidic Mine Wastes

2021 ◽  
Author(s):  
Arturo Aguirre Gómez ◽  
Laura Virginia Nuñez Balderas ◽  
Claudia Hidalgo Moreno ◽  
Jorge Dionisio Etchevers Barra
Keyword(s):  
Heavy Metal ◽  
Mine Tailings ◽  
Metal Speciation ◽  
Mine Waste ◽  
Oxygen Demand ◽  
High Growth ◽  
High Growth Rate ◽  
National Standards ◽  
High Rate ◽  
Mine Wastes

The chapter is meant to expose how a sound methodology can be instrumented to both, remediate acidic metal polluted mine wastes, taking advantage of the neutralizing power and high metal sorption affinity of biochar, and to utilize pyrolyzed material derived from high-rate growth plants (water hyacinth, Eichhornia crassipes Mart, and Eucalyptus, Eucalyptus globulus Labill), which have become of ecological relevance due to their unwanted proliferation over specific terrestrial, lacustrine or riverine environments. In addition, the proposal considers not only neutralizing the mine tailings and abating the toxic levels of specific heavy metals like Pb, Cd, Cu, Zn, etc., to fulfill the international and national standards and norms, but to conveniently combine biochar with widely used soil amendments to pass widely recognized biological tests of growth using heavy metal-sensitive plants. The approach addresses firstly: a) characterizing physiochemically mine tailings and biochar, in terms of their properties (metal speciation and contents, potential acidity and neutralization potential, chemical oxygen demand, heavy metal-biochar sorption-complexing affinities, among others), and secondly; b) creating a” fertile environment” by reconditioning, agriculturally, the heavy metal-polluted acidic mine waste to allow native vegetation, or other reforesting species, to regrow on the reclaimed site, based on the bioassay tests performances.

scholarly journals Bioaccumulation of heavy metals and As in maize (Zea mays L) grown close to mine tailings strongly impacts plant development

2021 ◽  
Author(s):  
ESTHER AURORA RUIZ HUERTA ◽  
Maria Aurora Armienta Hernández ◽  
Joseph G. Dubrovsky ◽  
Juan Miguel Gómez Bernal
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Zea Mays ◽  
Plant Growth ◽  
Plant Development ◽  
Mine Tailings ◽  
Strong Impact ◽  
Potentially Toxic Metals ◽  
Microscopic Studies ◽  
Mining Residues

Abstract Potentially toxic metals and metalloids present in mining residues can affect ecosystems, particularly plant growth and development. In this study we evaluated As and heavy metal (Fe, Zn, Cu, Cd, Pb) contents in maize (Zea mays L) plants grown in soils collected near (40 m), at intermediate (400 m) and remote (3000 m) distances from mine tailings near Taxco City, Mexico. Soils sampled near and at intermediate sites from the tailings contained high levels of heavy metals which were 3- to 55-fold higher compared to the control samples. The heavy metal and As content in plants reflected the soil contamination being the greatest for most studied elements in root samples followed by stems, leaves, and kernels. Though plants were capable of completing their life cycle and producing the seeds, high bioaccumulation levels had a strong impact on plant development. Abnormalities in the organs like malformations in reproductive structures (tassel and ear), reduction in the phytomer number and the plant height were present. Microscopic studies and morphometric analyses suggest that strongly affected plant growth result from negative and synergistic action of heavy metals and As in soils on cell growth and cell production. This study showed that maize grown near mine tailings accumulates high levels of heavy metals and As which decrease significantly plant yield and could be dangerous if consumed by animals and humans.

scholarly journals Heavy Metal Contamination in Soil: Sources, Accumulation in Vegetables and Remedial Measures: A Review

Agropedology ◽  
2019 ◽  
Vol 30 (2) ◽  
Author(s):  
Sandeep Kumar ◽  
◽  
Lal Chand Malav ◽  
Shiv Prasad ◽  
Sunita Yadav ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Toxic Metals ◽  
Urban Areas ◽  
Metal Contamination ◽  
Industrial Development ◽  
Heavy Metal Contamination ◽  
Biological Activities ◽  
Vegetable Production ◽  
Human Beings ◽  
Negative Effects

Presently, rapid industrialization and mechanization create a lot of heavy metal pollution around the globe. Both anthropogenic and natural sources are responsible for the discharge of heavy metal in the environment. Anyhow, these toxic metals reach into soil, water bodies, plants and finally to human beings through the food chain. These toxic metals create several problems in plants and living beings after intake from the soil and get accumulated in their body. Heavy metals also exhibit toxic effects on soil biological activities by affecting key microbial processes and also hamper the activities of soil microbes. Recently, due to industrial development in urban areas, heavy metal contamination has become a serious threat to peri-urban agriculture prevalent for vegetable production. There has long been a need for decontamination of these agricultural resources and prevention from the further contamination to avert the negative effects on living beings. In this article, an attempt has been made to provide an extensive understanding about different sources of heavy metal, such as zinc (Zn), copper (Cu), lead (Pb) and cadmium (Cd) etc., in agro-ecosystem and their possible risks to soil and plants. An effort has been also made to present in brief information on remediation techniques specially phytoremediation through this review.

scholarly journals Biosorption and Bioaccumulation Abilities of Actinomycetes/Streptomycetes Isolated from Metal Contaminated Sites

Separations ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 54 ◽  
Author(s):  
Ivana Timková ◽  
Jana Sedláková-Kaduková ◽  
Peter Pristaš
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ion ◽  
Polluted Soil ◽  
Negative Effects ◽  
Wide Range ◽  
Specific Uptake ◽  
High Concentrations ◽  
Further Development ◽  
Soil And Water

Heavy metal pollution is of great concern. Due to expansion of industrial activities, a large amount of metal is released into the environment, disturbing its fragile balance. Conventional methods of remediation of heavy metal-polluted soil and water are expensive and inefficient. Therefore, new techniques are needed to provide environmentally friendly and highly selective remediation. Streptomycetes, with their unique growth characteristics, ability to form spores and mycelia, and relatively rapid colonization of substrates, act as suitable agents for bioremediation of metals and organic compounds in polluted soil and water. A variety of mechanisms could be involved in reduction of metals in the environment, e.g., sorption to exopolymers, precipitation, biosorption and bioaccumulation. Studies performed on biosorption and bioaccumulation potential of streptomycetes could be used as a basis for further development in this field. Streptomycetes are of interest because of their ability to survive in environments contaminated by metals through the production of a wide range of metal ion chelators, such as siderophores, which provide protection from the negative effects of heavy metals or specific uptake for specialized metabolic processes. Many strains also have the equally important characteristic of resistance to high concentrations of heavy metals.

scholarly journals Bioremediation Options for Heavy Metal Pollution

2019 ◽  
Vol 9 (24) ◽  
pp. 191203 ◽  
Author(s):  
Meena Kapahi ◽  
Sarita Sachdeva
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Anthropogenic Activities ◽  
Environmental Pollutants ◽  
Human Beings ◽  
Heavy Metal Leaching ◽  
Advantages And Disadvantages ◽  
Financial Interests

Background. Rapid industrialization and anthropogenic activities such as the unmanaged use of agro-chemicals, fossil fuel burning and dumping of sewage sludge have caused soils and waterways to be severely contaminated with heavy metals. Heavy metals are non-biodegradable and persist in the environment. Hence, remediation is required to avoid heavy metal leaching or mobilization into environmental segments and to facilitate their extraction. Objectives. The present work briefly outlines the environmental occurrence of heavy metals and strategies for using microorganisms for bioremediation processes as reported in the scientific literature. Methods. Databases were searched from different libraries, including Google Scholar, Medline and Scopus. Observations across studies were then compared with the standards for discharge of environmental pollutants. Discussion. Bioremediation employs microorganisms for removing heavy metals. Microorganisms have adopted different mechanisms for bioremediation. These mechanisms are unique in their specific requirements, advantages, and disadvantages, the success of which depends chiefly upon the kind of organisms and the contaminants involved in the process. Conclusions. Heavy metal pollution creates environmental stress for human beings, plants, animals and other organisms. A complete understanding of the process and various alternatives for remediation at different steps is needed to ensure effective and economic processes. Competing interests. The authors declare no competing financial interests.

Alteration of Heavy Metal Fractions in Soil of Guiyu, South China by Native Bacillus cereus under the Effect of BDE209

2013 ◽  
Vol 726-731 ◽  
pp. 3901-3907
Author(s):  
Hui Peng ◽  
Hua Yin ◽  
Jin Shao Ye
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Bacillus Cereus ◽  
Sequential Extraction ◽  
South China ◽  
Metal Speciation ◽  
Interaction Time ◽  
Icp Oes ◽  
Decabromodiphenyl Ether ◽  
Concentration Variation

Microbiologic experiments together with Tessier sequential extraction and ICP-OES determination showed that distributions of Pb, Cu, Cd and Cr in soil of Guiyu, an e-waste dismantling region in South China, have changed after activities of native combined Bacillus cereus. Exchangeable fractions of these heavy metals were 1.52, 12.32, 3.98 and 34.50-fold those of original ones after 8 h interaction, here the organic phases were supposed to be the main alteration origin. The changing interaction time brought different impacts on concentration variation of heavy metals. Decabromodiphenyl ether (BDE209) influenced combined Bacillus cereus to redistribute the shares of heavy metals. BDE209 of 1 mg/L favored the alteration to make heavy metals become more bioavailable, while 5 mg/L and 10 mg/L of BDE209 baffled this alteration. However, influences of these strains on heavy metal speciation could be generally enhanced at the presence of BDE209, particularly for Cu and Pb Therefore, non-residual fractions were easier to be transferred into bioavailable ones after interaction with biomass, thus favoring the subsequent bioremediation of soil.

Sign in / Sign up

Export Citation Format

Share Document