Distribution, fractionation and mobility assessment of heavy metals in a spiked soil using a multi-species soil system

The present paper is aimed towards the assessment of heavy metal contamination of agricultural soil due to irrigation with contaminated ground water affected by textile industrial effluents at Panipat city in India. Samples of ground water and irrigated soils from textile industrial area were analyzed for various heavy metals, viz. Mn, Ni, Fe, Cu, Cd, Pb and Zn, using Atomic Absorption Spectrophotometry. Metal transfer factors from ground water to irrigated agricultural soil and from soil to ground water were calculated for heavy metals. The findings deal with the distribution of heavy metals in ground water of industrial area and irrigated agricultural soil. Transfer factors for heavy metals from effluent to ground water were observed to be 0.436, 1.180, 6.461, 2.401, 2.790, 3.178 and 0.634 for Cd, Cu, Fe, Mn, Ni, Pb and Zn respectively. These were found to be very high from ground water to agriculture soil due to the natural shale value of heavy metals in soil system. Thus, untreated industrial effluents can cause an environmental threat to ground water resources and affects soil quality and agricultural plant productivity.

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Accumulation and translocation of heavy metals in the canola (Brassica napus L.)—soil system in Yangtze River Delta, China

Plant and Soil ◽

10.1007/s11104-011-1006-5 ◽

2011 ◽

Vol 353 (1-2) ◽

pp. 33-45 ◽

Cited By ~ 26

Author(s):

Ruilian Yu ◽

Junfeng Ji ◽

Xuyin Yuan ◽

Yinxian Song ◽

Cheng Wang

Keyword(s):

Heavy Metals ◽

Brassica Napus ◽

Yangtze River ◽

Yangtze River Delta ◽

River Delta ◽

Brassica Napus L ◽

Soil System

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Investigation of the Influence of Aerotechnogenic Pollution on the Accumulation of Heavy Metals in the Plant-Soil System

Ecology and Industry of Russia ◽

10.18412/1816-0395-2019-6-52-57 ◽

2019 ◽

Vol 23 (6) ◽

pp. 52-57

Author(s):

M.V. Medvedeva ◽

T.S. Titova ◽

O.N. Bakhmet ◽

A.N. Pekkoev ◽

V.A. Kharitonov

Keyword(s):

Heavy Metals ◽

Woody Plants ◽

Ash Content ◽

Environmental Risks ◽

Soil System ◽

Plant Soil ◽

Railway Infrastructure ◽

Aerotechnogenic Pollution ◽

Pollution Accumulation ◽

Environmental Measures

It is shown that the chemical composition of the litter falls and wood of deciduous and coniferous trees is different. On the background of aerotechnogenic pollution, accumulation of individual heavy metals, an increase in ash content was noted. There was revealed the anthropogenic dynamics of the accumulation of heavy metals in the wood of trees: the maximum number during the period of diesel traction; as the railway site is electrified, the accumulation of elements decreases. The obtained data can be recommended to be used for phytoremediation at sites subject to pollution. The obtained data will be the basis for assessing the phytoextractive potential of woody plants, in diagnosing aero-technogenic pollution of the environment, solving the problem of reducing environmental risks, as well as during the modernization and planning of environmental measures in the field of railway infrastructure.

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The role of clay minerals and the effect of H+ ions on removal of heavy metal (Pb2+) from contaminated soils

Canadian Geotechnical Journal ◽

10.1139/t99-106 ◽

2000 ◽

Vol 37 (2) ◽

pp. 296-307 ◽

Cited By ~ 31

Author(s):

Loretta Y Li ◽

Raymond S Li

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Surface Charge ◽

Clay Minerals ◽

Contaminated Soils ◽

Surface Charges ◽

Buffer Solution ◽

Soil System ◽

Variable Charge ◽

Acid Leach

The importance of the surface charge of clay minerals (fixed or variable) and the effect of H+ ions on the adsorption and removal of Pb2+ ions from contaminated soil are investigated using kaolinite (variable charge) and two illitic (fixed charge) soils with pH 3.9 and 9.2. The adsorption-desorption characteristics of Pb2+ ions were determined using batch equilibrium tests and acid leach tests with various acids used to leach the soils. Under the same adsorption conditions, illitic soil adsorbed much more Pb2+ ions than kaolinite. The difference is largely due to the surface charges on the clay minerals. Removal of Pb2+ ions from variable-charge minerals (e.g., kaolinite) requires much less effort than removal of Pb2+ ions from constant-charge minerals (e.g., illite). The surface charge of a clay mineral has an important effect. By increasing the number of H+ ions available in the soil system with a buffer solution such as NaOAc-HOAc, heavy metals adsorbed on the clay surface are expelled to pore water. The increase in H+ ions in the soil system also assists in dissolving any metal carbonates, thereby increasing the solubility of heavy metals in illitic soil. The more H+ ions available in the pore fluid, the more Pb2+ ions can be released from the system.Key words: clay minerals, sorption, desorption, heavy metal, hydrogen ion, electrokinetic, acid leach.

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Role of green spaces for migration and setting of heavy metals (as illustrated by Holosiivskyi National Nature Park, Kyiv)

Ukrainian hydrometeorological journal ◽

10.31481/uhmj.27.2021.10 ◽

2021 ◽

pp. 97-105

Author(s):

T. S. Tesolkina ◽

D. V. Lukashov

Keyword(s):

Heavy Metals ◽

Forest Litter ◽

Green Spaces ◽

Winter Period ◽

Soil System ◽

Atmospheric Air ◽

Leading Role ◽

Nature Park

Air pollution by heavy metals in the urbanized surroundings presents a serious threat to human health and the environment. Road dust is distinguished as a high-level pollutant and characterized by a significant content of heavy metals. Green spaces play a leading role when it comes to improving the quality of atmospheric air in megalopolises. They trap pollutants. Most of them settle on the surfaces of plant leaves, but some can be also absorbed through the stomata. As a result of these processes, pollutants, along with fallen leaves, can later migrate to other components of the ecosystem. An important component of this system is forest litter that plays a kind of trigger role by regulating the directions of substance flows in the “leaves-litter-soil” system, keeping chemical elements from leaching out and evenly distributing their inflows. Thus, forest litter functions as a sort of biogeochemical barrier and plays a leading role in the ability of ecosystems to self-regulate. Thus, the purpose of this work was to assess the role of green spaces in improving the quality of atmospheric air in the urban surroundings and to conduct a preliminary assessment of the features of the processes of heavy metals transformation within the forest litter. The model site of research is located within the territory of Holosiivskyi forest, a part of the Holosiivskyi National Nature Park (Kyiv). The content of heavy metals in the forest litter was determined using the methods of atomic absorption spectrophotometry. The results of the study of Cu, Ni, Pb, Cd, Cr and Zn content annual dynamics within the forest litter of the hornbeam forest of the Holosiivskyi National Nature Park show that the maximum concentrations are typical for the summer period, when the litter reserves sharply decrease, and the minimum ones – for the autumn-winter period during their accumulation. Comparison of the distribution of heavy metals content within the leaf and fermented layers showed that, under the conditions of the model area, Zn, Cu, and Ni are predominantly accumulated right in the leaf layer of the forest litter. Moreover, it was revealed that the processes of leaf litter mineralization lead to migration of Cu, Ni, Pb, Cd and Cr, and setting of Zn.

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The Preliminary Study for Effect of Plant Extract on Concentration of Heavy Metals in Soil

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/945/1/012065 ◽

2021 ◽

Vol 945 (1) ◽

pp. 012065

Author(s):

Li Na Lee ◽

Xinxin Guo ◽

Jinq Shiou Lim ◽

Rou Hui Wong ◽

Choon Aun Ng ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Plant Extract ◽

Metal Contamination ◽

Heavy Metal Contamination ◽

Anthropogenic Activities ◽

High Energy ◽

Liquid Form ◽

Weight Percentage ◽

Spiked Soil

Abstract Heavy metal contamination in soils had arisen into a more prominent problem as a result of increasing anthropogenic activities like manufacturing, mining, excessive application of agricultural chemicals and inappropriate disposal of wastes. Researchers across the globe had been striving to discover and develop methods to restore the soil back to its original condition with an assortment of remediation techniques that varies from treatment mechanism for various soil and contamination condition. Majority of the existing techniques have drawbacks like high energy consumption, specificity on the site condition, limitations on applicable contaminants, side effects after treatment, and also being uneconomical. More and more researchers are beginning to divert their attention into using organic stabilizers for treatment of soil heavy metal contamination in recent years after learning about its potential after numerous research showed promising reduction on the bioavailability and mobility of heavy metals. Due the lack of study on liquid-form organic stabilizers, the authors dedicated this research into implementing plant extract (TM) in the immobilization of heavy metals in soil. For comparison purpose, sodium alginate (SA), a proven organic stabilizer had been incorporated into the experiment to evaluate the performance of plant extract to immobilize cadmium (Cd), chromium (Cr), and manganese (Mn) from the metal-spiked soil samples in this research. The study findings suggested that the SA increased the unstable fractions, namely the exchangeable and carbonate fractions, of Cd relative to the untreated soil sample by 10.3 % to 5.2. On the other hand, the TM yields a result of 0.1 % to 1.1 % reduction of the unstable Cd. For the unstable Cr, both SA and TM decreased the concentration levels in the soil by 2.5 % to 8.0 % and 6.1 % to 7.9 % respectively. The results for Mn showed that the SA is able to decrease the concentration of its unstable fractions by 2.0 % to 7.5 % while the TM increases the concentration by 11.7 % to 1.5 %. In general, lower concentration of heavy metals in the unstable fractions was detected as the dosage of soil stabilizers applied increases. The application of soil stabilizers at 10 % weight percentage yields the lowest reading of unstable heavy metals in comparison with samples with lower dosage.

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