THE EFFECT OF HEAVY METALS ON PLANT COMMUNITIES DISTRIBUTION IN AN ABANDONEND MINING AREA (NORTHEAST-ALGERIA)

AbstractDue to the special sensitivity of typical ecologically fragile areas, a series of human life, mining, and other activities have a greater impact on the environment. In this study, three coal mines in Ordos City on the Loess Plateau were selected as the study area, and the pollution levels of heavy metals in the area were studied by measuring As, Hg, Cr, Cd, Cu, Ni, and Pb in the soil of 131 sampling points. Combined with the concept of “co-occurrence network” in biology, the level of heavy metals in soil was studied using geostatistics and remote sensing databases. The results showed that the concentrations of Hg, Cr, Ni, Cu, and Pb in more than half of the sampling points were higher than the local environmental background value, but did not exceed the risk control value specified by China, indicating that human factors have a greater influence, while Cd and As elements are mainly affected Soil parent material and human factors influence. Heavy metal elements have nothing to do with clay and silt but have an obvious correlation with gravel. Cd, Pb, As and Ni, Cd, Cr are all positively correlated, and different heavy metals are in space The distribution also reflects the autocorrelation, mainly concentrated in the northeast of the TS mining area and the middle of the PS mining area.

Download Full-text

Analysis of the distribution of heavy metals in the soils of Bagega mining area Zamfara state, Nigeria

Bayero Journal of Pure and Applied Sciences ◽

10.4314/bajopas.v9i1.23 ◽

2016 ◽

Vol 9 (1) ◽

pp. 150 ◽

Cited By ~ 4

Author(s):

K. Salisu ◽

M.A. Yusuf ◽

M. Ahmed ◽

M. U. Mohammed ◽

I. A. Umar

Keyword(s):

Heavy Metals ◽

Mining Area

Download Full-text

Heavy metal composition of maize and tomato grown on contaminated soils

Open Agriculture ◽

10.1515/opag-2018-0046 ◽

2018 ◽

Vol 3 (1) ◽

pp. 414-426

Author(s):

A.O. Adekiya ◽

A.P. Oloruntoba ◽

S.O. Ojeniyi ◽

B.S. Ewulo

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Contaminated Soils ◽

Heavy Metal Contamination ◽

Mining Area ◽

Atomic Absorption Spectrophotometry ◽

Toxic Heavy Metals ◽

Mining Site ◽

Solanum Lycopersicum L ◽

Sources Of Pollution

Abstract The study investigated the level of heavy metal contamination in plants {maize (Zea mays) and tomato (Solanum lycopersicum L.)} from thirty soil samples of three locations (Epe, Igun and Ijana) in the Ilesha gold mining area, Osun State, Nigeria. Total concentrations of As, Cd, Co, Cr, Cu, Ni, Pb and Zn were determined using atomic absorption spectrophotometry. Spatial variations were observed for all metals across the locations which was adduced to pH and the clay contents of the soils of each location. The results showed that heavy metals are more concentrated in the areas that are closer to the mining site and the concentrations in soil and plants (maize and tomato) decreased with increasing perpendicular distance from the mining site, indicating that the gold mine was the main sources of pollution. The mean concentrations of heavy metals in plants (tomato and maize) samples were considered to be contaminated as As, Cd and Pb respectively ranged from 0.6 - 2.04 mg kg-1, 0.8 - 5.2 mg kg-1, 0.8 - 3.04 mg kg-1 for tomato and respectively 0.60 - 2.00 mg kg-1, 1.50 - 4.60 mg kg-1 and 0.90 - 2.50 mg kg-1 for maize. These levels exceeded the maximum permissible limits set by FAO/WHO for vegetables. In conclusion, monitoring of crops for toxic heavy metals is essential for food safety in Nigeria.

Download Full-text

Heavy metal distribution in sediments around the offshore tin mining area of Central Bangka Regency, Indonesia

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/926/1/012027 ◽

2021 ◽

Vol 926 (1) ◽

pp. 012027

Author(s):

Irvani ◽

S Adibrata ◽

M Yusuf ◽

M Hudatwi ◽

A Pamungkas

Keyword(s):

Heavy Metals ◽

Spatial Distribution ◽

Active Surface ◽

Fine Sand ◽

Mining Area ◽

Pollution Load Index ◽

Coarse Sand ◽

Sieve Analysis ◽

Marine Animals ◽

Type Composition

Abstract Vary heavy metals scattered in suspension loads and re-sedimentation from the tailing of the offshore-alluvial tin mining at Tanah Merah and its surroundings, Central Bangka Regency. Research is needed to determine the type, composition, spatial distribution of heavy metals, and potential pollution. The active surface-sediments were taken from shallow marine systematically around the offshore tin mining area in the east season. Geochemical analysis of sediment using x-ray fluorescence, coupled with minerals and sieve analysis, and support by spatial analysis. These sediments have dominant the sand-size (range very-fine sand to coarse sand) and silt, contained predominantly large quantities of quartz minerals and shell fragments of marine animals. The metals are in the following decreasing order: Cr>Zn>Pb>Ni>Cu>As>Co>Cd. The spatial distribution of heavy metals generally has a relatively south, east, and north position, with concentrations occurring along the coastline and showing the degradation composition towards the open sea. The marine sediments are uncontaminated to moderately contaminated by Cd and Pb, indicate both natural and anthropogenic enrichment, low the pollution load index (PLI), and have various potential ecological risks index (RI) (low to very high RI).

Download Full-text

Accumulation of heavy metals in birch and pine forest roadside phytocenoses in the south of Tyumen region

Biosystems Diversity ◽

10.15421/011835 ◽

2018 ◽

Vol 26 (3) ◽

pp. 233-238

Author(s):

E. I. Popova

Keyword(s):

Heavy Metals ◽

Plant Communities ◽

Betula Pendula ◽

Absorption Efficiency ◽

Pine Forests ◽

The South ◽

Natural Ecosystems ◽

Complex Investigation ◽

Betula Pendula Roth ◽

The Stability

We conducted a complex investigation of anthropogenic roadside phytocoenoses. For the study, 8 plots (birch and pine forests) were selected, close to roads in the south of Tyumen region within the five administrative districts: Uporovsky, Zavodoukovsky, Yalutorovskiy, Yarkovsky, and Tobolsk. As a result of the studies, 75 species of vascular plants from 21 families were noted in the plant communities. It was found that the majority of the total projective cover of the plant communities was provided by synanthropic species. In the synanthropic fraction of the flora, 33 species belonging to 11 families were identified, those with the most species being: Scrophulariaceae, Compositeae, Rubiaceae, Poaceae, Fabaceae, Polygonaceae, Umbellíferae. The index of synanthropization of the flora of the studied phytocenoses is in the range from 43% to 64%. Among the identified pollutants accumulated in the phytocenoses, the group of heavy metals was identified (Cr, Cu, Ni, Pb, Sr, Zn). Needles of Pinus sylvestris L. mainly accumulate Cr, Cu, Ni, Sr. The greatest concentration of Pb and Zn was found in the leaves of Betula pendula Roth. The content of other heavy metals in the leaves of Betula pendula Roth. during the growing season was relatively stable. Accumulation of heavy metals in the studied components of forest ecosystems can be displayed structurally: soil > leaves < phytomass (birch forests), soil < needles > phytomass (pine forests). Methodological approaches to conducting a complex of long-term observations of natural ecosystems have been formulated, substantiated and justified. To evaluate the absorption efficiency of heavy metals, the biological absorption coefficient was calculated. The obtained results can be used as a control in the study of migration and accumulation of heavy metals and for assessing the degree of anthropogenic load on phytocenoses of roadside ecosystems and predict the extent of probable changes in them. The forecast of the results will facilitate the elaboration of a necessary system of measures aimed at increasing the stability of plant communities.

Download Full-text