Heavy Metal Migration Rule in Yangshanchong Tailings of Tongling

2012 ◽  
Vol 573-574 ◽  
pp. 421-426 ◽  
Author(s):  
Jie Ying Huang ◽  
Xiao Chun Xu ◽  
Li Wei Chen ◽  
Yuan Xiang Zhou
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Mine Tailings ◽  
Open Channel ◽  
Transfer Rates ◽  
Secondary Enrichment ◽  
Tailings Reservoir ◽  
Heavy Metal Elements ◽  
Metal Migration ◽  
Local Enrichment

This study investigated the Yangshanchong tailings reservoir to determine the migration of heavy metals in mine tailings. By paralleling to tailings discharge direction, we set 4 sampling profiles, open channel excavation sampling. The results showed that the transfer rates of Cu, As, Hg, Cd, and Pb are relatively fast, while that of Zn is slower. Hg, Cu, Cd, Pb and Zn secondary enrichment appear at 40~80cm. There are some discrepancies in the heavy metal migration characteristics in different places. At the highest part of the tailings reservoir, heavy metal element's content is higher than the other sampling points, heavy metals leaching quantity is small, while in the low-lying areas, Zn, Cu and Cd form a local enrichment in the surface, and also part of heavy metal elements secondary enrichment in less than 100 cm shallow tailings. Surface grass planting can cause some elements to enrich, which might hinder the rehabilitation in the tailings reservoir.

Earthworm Processing of Livestock Manure and Accumulation of Heavy Metals

2012 ◽  
Vol 573-574 ◽  
pp. 1129-1133 ◽  
Author(s):  
Ji Cai Qiu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Organic Waste ◽  
Cow Dung ◽  
Optimum Conditions ◽  
Metal Enrichment ◽  
Heavy Metal Elements ◽  
Enrichment Techniques ◽  
Animal Feces ◽  
Strong Ability

The earthworm is an omnivorous animal low saprophytic, has a strong ability to decompose organic waste. The earthworm can directly grows on dung, consume a large amount of organic waste, numerous research reports, earthworm on heavy metal elements have very strong enrichment. Therefore, the use of earthworms as a bioreactor for animal feces, excessive heavy metals to biological concentration, reduce the content of heavy metals in animal feces, is a task that is worth to discuss. Taking the rural animal feces in the largest number, the most widely distributed of cow dung as study objects, to carry out the earthworm absorption in cow dung, Zn Pb Cu, the study of the optimum conditions for the further study of Earthworm on cattle manure, heavy metal enrichment techniques provide a basis.

scholarly journals The Migration of Chemical Contaminants from Polyethylene Bags into Food During Cooking

2015 ◽  
Vol 9 (1) ◽  
pp. 14-18 ◽  
Author(s):  
L. Musoke ◽  
N. Banadda ◽  
C. Sempala ◽  
J. Kigozi
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
The Body ◽  
Metal Concentrations ◽  
Chemical Contaminants ◽  
Heavy Metal Concentrations ◽  
Polyethylene Bags ◽  
Metal Migration ◽  
Health Complications ◽  
Banana Leaves

Cooking food in polyethylene bags has of late substituted banana leaves in Uganda. However, such a practice is risky as chemical contaminants may migrate from polyethylene bags into food during cooking causing health complications. Therefore, this study was done to identify and quantify the levels of chemical contaminants (heavy metals) in black and green polyethylene bags. Polyethylene bags were ashed and digested with acid and heavy metal concentrations determined using an AAS. Samples analyzed contained heavy metals with concentrations ranging between; 1125 - 1725, 76 - 112, 35 - 52, 18 - 31 ppm for Pb, Cd, Cr and Co respectively. Heavy metal migration studies into posho cooked in the black polyethylene bags was done at 65°C (T), 80°C (T) and 95°C (T). The highest migrated heavy metal concentrations 120.60, 12.25, 9.45 and 15.42 ppm for Pb, Cd, Cr and Co respectively were obtained at T3 at the surface of the posho cube (0.5cm) after 5 hours of heating. While the lowest values for Pb (10.60 ppm), Cd (1.26 ppm), Cr (0.20 ppm) and Co (1.55 ppm) were obtained at T1 towards the centroid of the posho cube (1.5 cm) after 2 hours of heating. Pb migrated highest followed by Co, Cr and Cd. Though small quantities migrated, over a long period of time they may accumulate in the body and cause health complications to the victims. To make this research of substantial importance to the polyethylene bag user, the findings were disseminated through media to the general public.

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 Assessment, Distribution and Regional Geochemical Baseline of Heavy Metals in Soils of Densely Populated Area: A Case Study

2020 ◽  
Vol 17 (7) ◽  
pp. 2269
Author(s):  
Song Chen ◽  
Cancan Wu ◽  
Shenshen Hong ◽  
Qianqian Chen
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Spatial Differentiation ◽  
Principal Component ◽  
Geochemical Baseline ◽  
Metal Elements ◽  
The North ◽  
Accumulation Index ◽  
Heavy Metal Elements

To understand the content, pollution, distribution and source and to establish a geochemical baseline of heavy metal elements in soil under the influence of high-density population, the concentrations of heavy metal elements Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Hg, Pb and Fe were determined in 23 soil samples in Suzhou University, and geo-accumulation index, enrichment factor, principal component analysis, spatial analysis and regression analysis were completed. The results showed the following: The elements Cu and As were slightly polluted, while the other heavy metal elements were not. The elements Cd, Cu, Ni and As in soils were mainly caused by agricultural activities of chemical fertilizer, whereas the elements Zn and Hg were impacted by the chemicals and batteries. The heavy metal elements in the north were lower than in the south of the campus, as a whole. The enrichment of elements Cu, As and Cd was caused by the east–west river on the campus, and the enrichment of the elements Mn, Ni and Zn was induced by the reservoir. Biochemical experiments and vehicle parking influenced the spatial enrichment of Cr, Co and Pb, while domestic waste led to the spatial differentiation of Hg concentrations. The regression curve between heavy metal elements and Fe was established, and the background values of the heavy metals Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Hg and Pb are 50.90, 489.37, 11.76, 37.74, 55.70, 58.22, 20.07, 0.09, 0.08 and 24.13 mg/kg, respectively.

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.

Distribution and secondary enrichment of heavy metal elements in karstic soils with high geochemical background in Guangxi, China

2021 ◽  
Vol 567 ◽  
pp. 120081
Author(s):  
Qiong Yang ◽  
Zhongfang Yang ◽  
Gabriel M. Filippelli ◽  
Junfeng Ji ◽  
Wenbing Ji ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Geochemical Background ◽  
Metal Elements ◽  
Secondary Enrichment ◽  
Heavy Metal Elements

A Comparative Study on the Pollution and Speciation Characteristics of Heavy Metals between the Gold and Iron Mine Tailings of the Upstream Area of Miyun Reservoir, Beijing

2012 ◽  
Vol 518-523 ◽  
pp. 1412-1416 ◽  
Author(s):  
Xing Xing Huang ◽  
Hong Bing Ji ◽  
Cai Li ◽  
Fei Qin ◽  
Qian Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Sequential Extraction ◽  
Mine Tailings ◽  
Mine Tailing ◽  
Gold Mine ◽  
Miyun Reservoir ◽  
Total Metal ◽  
Iron Mine ◽  
Gold Mine Tailings

In order to have a comparative investigation of the pollution and speciation characteristics of heavy metals between the gold and iron mine tailings of the upstream areas of Miyun Reservoir, the tailing samples from the typical gold and iron mines were analyzed. The total metal concentration is determined by acid digestion and the chemical fractionation of metal by the Tessier sequential extraction method. It is found that compared to background values of Beijing, the heavy metal in both gold and iron mine tailings is higher, while the heavy metal in gold mine tailings is higher than that of iron mine tailings, with Mn as an exception. Mercury is the most serious pollution element in gold mine tailings. Results of the sequential extraction suggest that the exchangeable of Cd exhibits the highest percentage of total metal in gold and iron mine tailings（15% and 6.5% of the total metal, respectively) among Cd, Mn, Zn, Cu, Pb, Cr. In the majority of iron mine tailing samples collected, large amounts of Cu were mainly associated with the organic form. The percentage of the bioavailable metals in both gold and iron mine tailing samples follows the order: Cd>Mn>Zn>Cu>Pb>Cr.

Physicochemical properties, heavy metals, and metal-tolerant bacteria profiles of abandoned gold mine tailings in Krugersdorp, South Africa

2020 ◽  
Vol 100 (3) ◽  
pp. 217-233
Author(s):  
Muibat Omotola Fashola ◽  
Veronica Mpode Ngole-Jeme ◽  
Olubukola Oluranti Babalola
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Physicochemical Properties ◽  
Mine Tailings ◽  
Terrestrial Ecosystems ◽  
Gold Mine ◽  
Biochemical Tests ◽  
Mining Sites ◽  
Gold Mine Tailings ◽  
Metal Tolerant Bacteria

Mine tailings are a potential source of heavy metals (HM) that can be toxic to microbes, plants, and animals in aquatic and terrestrial ecosystems. Bacteria have evolved several mechanisms to tolerate the uptake of HM ions. This study aimed to assess the physicochemical properties, concentrations of selected HM and metalloids [arsenic (As), nickel (Ni), lead (Pb), zinc (Zn), cadmium (Cd), and cobalt (Co)], and isolate potential metal-tolerant bacteria present at three abandoned gold mining sites with a view of understanding how tailings characteristics vary and the implications on microbial activities in tailings dumps. Heavy-metal-tolerant bacteria were isolated from the samples using minimum inhibitory and maximum tolerable concentrations of the Ni, Pb, Zn, Cd, and Co. The substrates of the studied sites were acidic and deficient in nutrients. High metals and metalloid concentrations in the order Zn > Ni > Co > As > Pb > Cd were recorded in some of the studied sites and its adjacent soil which exceeded South African recommended values for soil and sediments. Heavy-metal-tolerant bacteria that showed multiple tolerances to Ni, Pb, and Zn were isolated and putatively identified using biochemical tests as belonging to the phyla Proteobacteria, Actinobacteria, and Firmicutes. Gold mine tailings enriched the soil with HM and also affect soil physicochemical properties. Proper management of mine wastes must be ensured to prevent their adverse effects on the diversity, composition, and activity of soil microorganisms that help in maintenance of the ecosystem.

Study on the Migration Law of Heavy Metal Elements of Open Pit Waste Dump in Surrounding Soil

2013 ◽  
Vol 361-363 ◽  
pp. 942-948
Author(s):  
Xiao Guang Zhao ◽  
Yang Yang ◽  
Nian Zhang ◽  
Yu Li
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Soil Depth ◽  
Quality Standard ◽  
Coal Gangue ◽  
Open Pit ◽  
Horizontal Distance ◽  
Metal Elements ◽  
Heavy Metal Elements ◽  
Migration Law

Taking Shaanxi Tongchuan Cui Home Gully coal gangue as an example. The paper study on the migration law of heavy metal elements of open pit waste dump in surrounding soil by measuring and analyzing the contents of heavy metal elements which are Cu, Cr, Zn, Pb, Cd. The results show that: firstly, the elements contents of Cu, Cr, Zn, Pb are under the national secondary soil quality standard, but the content of Cd is above the national secondary soil quality standard, the single index of Cd is 3.03,this mean that the pollution is serious, so the situation should be pay more attention; secondly the contents of five heavy metals elements mainly accumulated in the range of 0~40cm soil profile in vertical direction, with the soil depth increase ,the contents of five heavy metals decrease, and when the soil depth is under 60m, the pollution reach stable state; thirdly, with the horizontal distance to coal gangue increase, the content of heavy metals which are Cu, Cr, Pb, Cd (soil depth is 5~20cm) decrease, but with the horizontal distance to coal gangue increase ,the content of Zn is much higher than other elements.

scholarly journals Heavy Metals in Tobacco Smoke II: Trace Metals Cadmium, Lead, Copper, Cobaltand Nickel in Austrian Cigarettesand in Particle Phase and Smoke Gas - Schwermetalle in Tabaken und in Tabakrauch ll: Spurenelemente Cadmium, Blei, Kupfer, Kobalt und Nickel in oesterreichischen Zigaretten und deren Rauchkondensaten und Rauchgasen

1991 ◽  
Vol 15 (1) ◽  
pp. 19-32 ◽  
Author(s):  
A Nitsch ◽  
K Kalcher ◽  
H Greschonig ◽  
R Pietsch
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Trace Metals ◽  
Tobacco Smoke ◽  
Mean Value ◽  
Particle Phase ◽  
Transfer Rates ◽  
Metal Contents ◽  
Cadmium Lead ◽  
Cobalt And Nickel

AbstractThe trace metals cadmium, lead, copper, cobalt and nickel have been analysed in 14 different Austrian filter cigarettes. The results show a good conformity thus allowing the calculation of a characteristic mean value. The same metals were analysed separately in the gas and particle phase. From this data and the results obtained from butt and ash analysis, the sidestream concentrations and the transfer rates for both fractions could be evaluated. A classification into light and heavy cigarettes on the basis of heavy metal contents could not be made due to the similarity of the results.

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