Phytoremediation of Cadmium Contaminated Soils: Advances and Researching Prospects

2013 ◽  
Vol 743-744 ◽  
pp. 732-744 ◽  
Author(s):  
Hui Su ◽  
Zhang Cai ◽  
Qi Xing Zhou
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Soil Contamination ◽  
Contaminated Soils ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Low Cost ◽  
Organic Contamination ◽  
Metal Organic

More and more attention has been paid to soil contamination by heavy metals in recent years. Heavy metal contamination includes heavy metal - heavy metal contamination, heavy metal - organic contamination, and heavy metal nutrient contamination. In particular, soil contamination by cadmium (Cd) is the most typical one. In terms of the current remediation technologies, phytoremediation of Cd contaminated soil remains popular due to its low cost, environmental aesthetics and in-situ effective treatment. Therefore, screening-out and identification of Cd hyperaccumulators becomes a hotspot in this researching domain. In order to further improve the efficiency of phytoremediation, we have developed a variety of joint remediation technologies. Based on these work at home and abroad, we summed up the studying progress in this field. Some main researching contents and directions of phytoremediation for Cd contaminated soils were also proposed.

scholarly journals Heavy Metals Concentration in Contaminated Soils from Southern Part of Romania

2011 ◽  
Vol 68 (2) ◽  
Author(s):  
Diana FLORESCU ◽  
Andreea IORDACHE ◽  
Claudia SANDRU ◽  
Elena HORJ ◽  
Roxana IONETE ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soils ◽  
Metal Contamination ◽  
Industrial Waste ◽  
Heavy Metal Contamination ◽  
Land Application ◽  
Industrial Wastes ◽  
Treatment Processes ◽  
Contamination Of Soils

As a result of accidental spills or leaks, industrial wastes may enter in soil and in streams. Some of the contaminants may not be completely removed by treatment processes; therefore, they could become a problem for these sources. The use of synthetic products (e.g. pesticides, paints, batteries, industrial waste, and land application of industrial or domestic sludge) can result in heavy metal contamination of soils.

scholarly journals Ecological risk assessment of heavy metal-contaminated soils of selected villages in Zamfara State, Nigeria

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Sharhabil Musa Yahaya ◽  
Fatima Abubakar ◽  
Nafiu Abdu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Contaminated Soils ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Pollution Indices ◽  
Mining Activities ◽  
Positive Correlation ◽  
Flame Atomic Absorption

AbstractThe incidence of heavy metal contamination in Zamfara State, northern Nigeria, due to artisanal mining in some villages has resulted in the pollution of a vast area of land and water. This study evaluated the extent of environmental risks caused by heavy metals. It involved five (5) villages (Bagega, Dareta, Sunke, Tunga, and Abare) where mining activities were taking place and Anka town with no record of mining activities served as control. In each of the five villages, three sites (3) were identified as a mining site, processing site, and village making a total of sixteen (16) sites. Bulked soil samples were collected in triplicate and analyzed for iron, lead, cadmium, chromium, zinc, and nickel using flame atomic absorption spectrophotometry. Measured concentrations of the heavy metals in soils were then used to calculate the pollution and ecological risk pose by heavy metals. Their concentrations were in the order Fe > Pb > Cr > Zn > Cd > Ni, with Pb and Cd having a concentration higher than permissible levels for soils and accounted for 98.64% of the total potential ecological risk. Also, all the different pollution indices examined showed that all the sites were polluted with Cd, and all the processing sites were polluted with Pb. This reveals that processing sites pose more risk to heavy metal contamination. Correlation analysis showed a highly significant (p < 0.001) positive correlation between Pb and Zn, Cr and Ni, and a significant (p < 0.01) positive correlation between Fe and Pb, Zn and Cr. The principal component analysis suggested that Pb, Zn, Cr, and Ni likely originated from the same source, i.e., mining activities, and Fe and Cd originated from the abundant parent material in the study area.

scholarly journals Vermi-remediation of Heavy Metal-Contaminated Soil

2013 ◽  
Vol 3 (4) ◽  
pp. 4-10 ◽  
Author(s):  
Suneet V. Dabke
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Soil Contamination ◽  
Heavy Metal Contamination ◽  
Low Cost ◽  
Rapid Development ◽  
Nutrient Balance ◽  
Industrial Facilities ◽  
Earthworm Population ◽  
Cadmium And Lead

Background. Rapid development in India has lead to pollution around industrial facilities. Earthworms are tolerant of many contaminants, and some are reported to remove heavy metals and pesticides from soil via tissue accumulation. Earthworm activity also increases levels of beneficial microbes. Objectives. Test vermi-remediation as a low-cost, on-site method of remediating heavy metal soil contamination. Methods. Soil was assessed for heavy metal contamination. Existing worm population was estimated via sampling, then the soil supplemented with beneficial bacteria, compost and a proprietary earthworm growth accelerator. Site was seeded with grass and maize, and Eisenia fetida worms introduced. Earthworm population was studied and soil contamination and accumulation in maize roots analyzed at the end of the project. Discussion. Worms were expected to remove heavy metals via bio-accumulation and also stimulate microbial remediation by increasing soil micro-organisms. Conclusions. The study showed positive results, with a reduction in chromium and survival of introduced earthworms, which reproduced after soil treatment, indicating improved conditions. Chromium concentrations were reduced to as low as 4.54mg/kg from a high of 194.17 mg/kg. There was variation in iron content and a controlled reduction in cadmium and lead. Due to limited funding, further study of the soil's final nutrient balance and earthworm analysis was not possible. Further study is necessary.

scholarly journals Heavy Metal Contamination of Roadside Soils of Northern England

2013 ◽  
Vol 1 (No. 4) ◽  
pp. 158-163 ◽  
Author(s):  
Akbar Khalid Farooq ◽  
Hale Wiliam HG ◽  
Athar Alistair D Headley and Mohammad
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soils ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Cadmium Concentration ◽  
Border Zone ◽  
Roadside Soils ◽  
Road Verge ◽  
Mean Concentration

Environmental pollution of heavy metals from automobiles has attained much attention in the recent past. The present research was conducted to study heavy metal contamination in roadside soils of northern England. Roadside soil samples were collected from 35 sites in some counties of northern England and analysed for four heavy metals (cadmium, copper, lead, zinc). Their concentrations and distributions in different road verge zones (border, verge, slope, ditch) were determined. Lead concentration was the highest in the soil and ranged from 25.0 to 1198.0 &mu;g/g (mean, 232.7 &mu;g/g). Zinc concentration ranged from 56.7 to 480.0 &mu;g/g (mean, 174.6 &mu;g/g) and copper concentration ranged from 15.5 to 240.0 &mu;g/g (mean, 87.3 &mu;g/g). Cadmium concentration was the lowest in the soil and varied from 0.3 to 3.8 &mu;g/g (mean, 1.4 &mu;g/g). Though the levels of heavy metals in roadside soils were higher as compared to their natural background levels in British soils, their concentrations in general, however, were below the &lsquo;critical trigger concentrations&rsquo; for the contaminated soils. All the four heavy metals exhibited a significant decrease in the roadside soils with the increasing distance from the road. The border zone had the highest mean concentration of the four metals whereas the ditch zone exhibited the lowest mean concentration.

scholarly journals Low-Cost Adsorbents Procedure by Means of Heavy Metal Elimination from Wastewater

2019 ◽  
Author(s):  
Nayankanti Devanna ◽  
Baby Abrarunnisa Begum ◽  
M.Adharvana Chari
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Low Cost ◽  
Chemical Oxidation ◽  
Walnut Shell ◽  
Peat Moss ◽  
Wood Processing ◽  
Waste Tea

The beginning of industrialization human being has observed a variety of environmental troubles in the world. This industrialization has not only brought growth and affluence but ultimately troubled the ecosystem. One of the crashes is visible, in form of water contamination. Here the current study heavy metal contamination of water body has been discussed. Effluents from a great number of industries viz., tannery, textile, pigment &amp; dyes, paint, wood processing, petroleum refining, electroplating, leather etc., have a major amount of heavy metals in their wastewater. The conventional technique of handling heavy metal pollution includes chemical oxidation, chemical precipitation, ion exchange, reverse osmosis, membrane separation, electrodialysis etc. These processes are expensive, energy intensive and frequently related with generation of poisonous by-product. Therefore, the adsorption has been examined as a cost-efficient technique of elimination of heavy metals from wastewater. In the current study different low-cost adsorbent has been a review as an abatement of heavy metal contamination from wastewater. These adsorbent comprise materials of natural origin like peat moss, zeolites, clay, and chitin are found to be an effective agent for removal of deadly heavy metals like Pb, Cd, Zn, Cu, Ni, Hg, Cr etc. Separately from these, a variety of agricultural wastes like rice husk, waste tea, neem bark, black gram; Turkish coffee, walnut shell etc. were also known as a powerful adsorbent for heavy metal removal. at the side of that low-cost industrial byproduct like fly ash, lignin, iron (III) hydroxide and red mud, coffee husks, Areca waste, tea factory waste, sugar beet pulp, battery industry waste, blast furnace sludge, waste slurry, sea nodule remains and grape stalk wastes have been discovered for their technical possibility to eliminate toxic heavy metals from impure water.

scholarly journals Overview of leaching remediation of heavy metal contamination in soil

2021 ◽  
Vol 245 ◽  
pp. 02005
Author(s):  
Cui Shuang ◽  
Han Qing ◽  
Zhang Tianyi
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soil ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Chelating Agent ◽  
Soil Leaching

The remediation methods of heavy metal contaminated soil can be divided into bioremediation, physical remediation and chemical remediation. Chemical remediation mainly includes soil leaching and chemical curing. There are two kinds of soil leaching remediation methods: in situ soil leaching remediation and ectopic leaching remediation. The eluent of heavy metals in soil includes inorganic eluent, chelating agent, surfactant and so on. Soil leaching can be applied to the remediation of contaminated soil alone or combined with other remediation methods.

scholarly journals Complex soil contamination severely impacts seed-sown crop viability in Australia

2021 ◽  
pp. 531-537
Author(s):  
Annaclaire G. McDonald ◽  
Brad R. Murray ◽  
Daniel W. Krix ◽  
Megan L. Murray
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Soil Contamination ◽  
Common Bean ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Seed Viability ◽  
Lead Contamination ◽  
Protection Measure ◽  
Crop Species

Food security is a critical issue for many global communities. Heavy metal contamination in soils present a major and ongoing ecological risk associated with human activities which may impact the viability and safety of seed-sown crops. To better understand the impacts of soil contamination by heavy metals on seed-sown crop viability, we examined germination responses of eight commercially-important fruit and vegetable crop species to copper, zinc, and lead contamination at levels likely to be found in contaminated regions in Australia. We compared the germination attributes of days to first germination, germination period, and total proportion of seeds germinated under concentration limits of heavy metals detected at degraded sites and current Australian National Environment Protection Measure thresholds for domestic soils (i.e., copper 6,000 mg kg-1, zinc 4,700 mg kg-1, lead 300 mg kg-1). The combined heavy metal treatment (i.e. all three metals) significantly inhibited germination for all edible crop species with only carrots able to germinate under complex, multi-metal-contaminated conditions. Seed viability was significantly decreased in mulberry (M. alba var. tatarica, M. nigra, and M. rubra) and lettuce (L. sativa), with lowered seed germination in all metals compared to carrot (D. carota), radish (R. sativus), tomato (S. lycopersicum) and common bean (P. vulgaris). These results indicate heavy metal contamination is a notable risk to seed-sown crop species, with multi-metal contamination events likely to be severely damaging to lettuce, tomato, radish, common bean, and mulberry crops

scholarly journals Abundance and Diversity of Archaea in Heavy-Metal-Contaminated Soils

1999 ◽  
Vol 65 (8) ◽  
pp. 3293-3297 ◽  
Author(s):  
Ruth-Anne Sandaa ◽  
Øivind Enger ◽  
Vigdis Torsvik
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soils ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Gradient Gel Electrophoresis ◽  
Abundance And Diversity ◽  
The Impact ◽  
Globally Distributed

ABSTRACT The impact of heavy-metal contamination on archaean communities was studied in soils amended with sewage sludge contaminated with heavy metals to varying extents. Fluorescent in situ hybridization showed a decrease in the percentage of Archaea from 1.3% ± 0.3% of 4′,6-diamidino-2-phenylindole-stained cells in untreated soil to below the detection limit in soils amended with heavy metals. A comparison of the archaean communities of the different plots by denaturing gradient gel electrophoresis revealed differences in the structure of the archaean communities in soils with increasing heavy-metal contamination. Analysis of cloned 16S ribosomal DNA showed close similarities to a unique and globally distributed lineage of the kingdom Crenarchaeota that is phylogenetically distinct from currently characterized crenarchaeotal species.

scholarly journals Assessment of Heavy Metals Levels in Soils of Old Oyo National Park, Southwest, Nigeria

2020 ◽  
Vol 1 (4) ◽  
Author(s):  
Adetola Taiwo Adetuga ◽  
Abosede O. Omonona ◽  
Afusat Jagun Jubril
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Soil Contamination ◽  
Metal Contamination ◽  
National Park ◽  
Heavy Metal Contamination ◽  
Cadmium Toxicity ◽  
Anthropogenic Factors ◽  
Moderate Degree ◽  
Degree Of Contamination

Soil contamination by heavy metals is a major environmental concern eliciting from both natural and anthropogenic factors, with the potential to disrupt the delicate balance of physical, chemical and biological processes which soil fertility and structure depends upon. The study therefore investigated the heavy metals levels and degree of contamination of soils sampl ed from three purposively-selected ranges (Oyo-Ile, Marguba, Tede) of Old Oyo National Park, Nigeria. Surface soil samples (0 -15 cm) were randomly collected along chosen topographical catenae for four seasons with the aid of a soil auger. The samples were analysed for copper, zinc, lead, nickel, cadmium, chromium, iron and manganese using standard methods. Data collected were subjected to descriptive and inferential (ANOVA) statistics using SPSS v.20 with statistical significance set at α0.05. The result of the mean concentration of the heavy metals showed that only cadmium was higher than the permissible limit. The ANOVA result showed that there were significant differences in the concentrations of all the analysed heavy metals except Ni (P=0.123) across the seasons of sampling. The quantitative indices used to assess the degree of heavy metal contamination showed that the studied soils had moderate degree of contamination while soil contamination was observed more during the wet season. This study observed cadmium toxicity as well as moderate degree of soil heavy metal contamination in Old Oyo National Park. There is need for continuous assessment of soil quality in Old Oyo National Park as a means of ensuring good ecological health.

scholarly journals Phytoremediation of Heavy Metals from Water of Yamuna River by Tagetes patula, Bassica scoparia, Portulaca grandiflora

2019 ◽  
pp. 1-14 ◽  
Author(s):  
Arpita Ghosh ◽  
Nikita Manchanda
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Toxic Metals ◽  
Contaminated Soils ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Metal Removal ◽  
Tagetes Patula ◽  
Yamuna River ◽  
Portulaca Grandiflora

Heavy metal contamination is a worldwide problem, causing many serious diseases and the levels of contamination varied from place to place. Heavy metals like cadmium (Cd), mercury (Hg), zinc (Zn), chromium (Cr), and lead (Pb) etc. are very injurious even at low concentration and are present in Yamuna river water. Phytoremediation has great potential as an efficient cleanup technology for contaminated soils, groundwater, and wastewater. It is a cheap and very efficient technique for metal removal. A study had been carried out to detect the efficiency of phytoremediation technique for removal of heavy toxic metals from water of Yamuna river. This study also focused on the phytoremediation capacity of all of three selected plants: Tagetes patula, Bassica scoparia, and Portulaca grandiflora. Bioaccumulation of heavy metals in various parts of plants has also been checked.

Sign in / Sign up

Export Citation Format

Share Document