scholarly journals Application of polyethylenimine-coated magnetic nanocomposites for the selective separation of Cs-enriched clay particles from radioactive soil

RSC Advances ◽  
2020 ◽  
Vol 10 (37) ◽  
pp. 21822-21829
Author(s):  
June-Hyun Kim ◽  
Sung-Man Kim ◽  
In-Ho Yoon ◽  
Ilgook Kim
Keyword(s):  
Contaminated Soil ◽  
Fine Particles ◽  
Selective Separation ◽  
Magnetic Nanocomposites ◽  
Clay Particles ◽  
Soil P

Selective separation of Cs-enriched fine particles from contaminated soil using Fe3O4-PEI nanocomposites and a mesh filter.

Enhanced selective separation of fine particles from Cs-contaminated soil using magnetic nanoparticles

2020 ◽  
Vol 21 (1) ◽  
pp. 346-354
Author(s):  
Ilgook Kim ◽  
June-Hyun Kim ◽  
Sung-Man Kim ◽  
Chan Woo Park ◽  
In-Ho Yoon ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Contaminated Soil ◽  
Fine Particles ◽  
Selective Separation

Studying the Geotechnical Properties of Clayey Soil Contaminated by Kerosene

2020 ◽  
Vol 857 ◽  
pp. 383-393
Author(s):  
Mahdi O. Karkush ◽  
Amer G. Jihad
Keyword(s):  
Shear Strength ◽  
Water Content ◽  
Contaminated Soil ◽  
Fine Particles ◽  
Clayey Soil ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Chemical Characteristics ◽  
Coefficient Of Consolidation ◽  
Plastic Containers

This study focuses on investigating the impacts of kerosene on the physical, mechanical, and chemical characteristics of clay soil. The soils specimens are contaminated artificially with six ratios of kerosene (5, 10, 20, 30, 40, and 50) % calculated according to the dry weight of soil. The artificial contamination includes air drying of the disturbed soil, then placed in plastic containers and mixed with the field water content and the specified concentration of kerosene to ensure getting homogenous contaminated soil specimens. The contaminated soil specimens left for 30 days in plastic containers covered by nylon sheets to control the water content and prevent volatility of contaminant. The results of tests proved that different ratios of kerosene have different impacts on the engineering and chemical characteristics of soil specimens. The specific gravity, percentages of fine particles, optimum water content, the initial and final void ratio, coefficient of consolidation, swelling index, permeability, the undrained shear strength, effective shear strength parameters, and the rate of reduction of initial pore water pressure are reduced significantly with increasing the content of kerosene in soil. Generally, the concentration of kerosene less than 10% has slight impacts on the studied characteristics of soil specimens.

scholarly journals Bioremediation of cadmium-contaminated paddy soil using an autotrophic and heterotrophic mixture

RSC Advances ◽  
2020 ◽  
Vol 10 (44) ◽  
pp. 26090-26101
Author(s):  
Menglong Xu ◽  
Yazi Liu ◽  
Yan Deng ◽  
Siyuan Zhang ◽  
Xiaodong Hao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Contaminated Soil ◽  
Paddy Soil ◽  
Contaminated Soils ◽  
Short Term ◽  
Remediation Technology ◽  
Soil P ◽  
Contaminated Paddy Soil

Bioremediation can be a promising and effective remediation technology for treating Cd contaminated soils. Cooperative bioremediation using heterotrophic and autotrophic mixtures proved to be an efficient, short-term bioremediation strategy for heavy metal contaminated soil.

scholarly journals Describing the toxicity and sources and the remediation technologies for mercury-contaminated soil

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23221-23232 ◽  
Author(s):  
Dongye Teng ◽  
Kang Mao ◽  
Waqar Ali ◽  
Guomin Xu ◽  
Guopei Huang ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Soil P ◽  
Natural Element ◽  
Inorganic And Organic

Mercury (Hg) is a natural element and its compounds are found as inorganic and organic forms in the environment.

Selective separation of very fine particles at a planar air–water interface

2010 ◽  
Vol 94 (1-2) ◽  
pp. 35-42 ◽  
Author(s):  
Diana N.H. Tran ◽  
Catherine P. Whitby ◽  
Daniel Fornasiero ◽  
John Ralston
Keyword(s):  
Fine Particles ◽  
Selective Separation ◽  
Water Interface ◽  
Air Water Interface

Selective Separation of Fine Particles by a New Flotation Approach

2002 ◽  
Vol 37 (9) ◽  
pp. 2097-2112 ◽  
Author(s):  
H. A. E. Mulleneers ◽  
L. K. Koopal ◽  
H. Bruning ◽  
W. H. Rulkens
Keyword(s):  
Fine Particles ◽  
Selective Separation

scholarly journals Evaluation of dissipation mechanisms for pyrene by maize (Zea Mays L.) in cadmium co-contaminated soil

2013 ◽  
Vol 11 (4) ◽  
pp. 487-496
Keyword(s):  
Zea Mays ◽  
Contaminated Soil ◽  
Growth Response ◽  
Zea Mays L ◽  
Plant Root ◽  
Complex Problem ◽  
Soil P ◽  
Metal Pollutants ◽  
Rhizosphere Microorganisms ◽  
Unplanted Soil

Sites co-contaminated with organic and metal pollutants are common and considered to be a more complex problem, as the two components often have a synergistic effect on cytotoxicity. This study investigated the dissipation mechnisms for pyrene in cadmium co-contaminated soil in which maize (ZEA MAYS L.) was grown in a greenhouse experiment. Results showed the growth response of maize may be affected by the co-contamination due to the interaction between the heavy metal and organic pollutants. Pyrene in both planted and unplanted soil diminished significantly at the end of 60-day culture, accounting for 21-31% of the initial extractable concentration in unplanted soil and 12-27% in planted soil, which indicated that the dissipation of pyrene was enhanced by the presence of vegetation. Although the presence of cadmium stimulated the accumulation of pyrene in roots and shoots of maize, contributions of plant off-take of pyrene to the total remediation enhancement in the presence of vegetation was less than 0.3%. A significant positive correlation was observed between soil enzyme activities (dehydrogenase, polyphenol oxidase) and the removal ratio of pyrene. Plant root exudates appear to promote the number of rhizosphere microorganisms and enzyme activity, thereby improving biodegradation of pyrene.

scholarly journals Phytoremediation effect of Medicago sativa colonized by Piriformospora indica in the phenanthrene and cadmium co-contaminated soil

2020 ◽  
Author(s):  
Liang Li ◽  
Pengyue Zhu ◽  
Xiaoyang Wang ◽  
Zhenhua Zhang
Keyword(s):  
Heavy Metals ◽  
Medicago Sativa ◽  
Contaminated Soil ◽  
Cadmium Accumulation ◽  
Piriformospora Indica ◽  
Soil P ◽  
Psii Photochemistry ◽  
Cadmium Contaminated Soil ◽  
Quantum Efficiency Of Psii

Abstract Background: Coexistence of polycylic aromatic hydrocarbons (PAHs) and heavy metals deleteriously threatens the quality of environmental health . Few reports uncover the mechanism of inoculation plants with Piriformospora indica for remediating PAH- m etal co-contaminated soil by analyzing the chemical speciations of contaminants . This study investigated the influence of inoculation Medicago sativa with P. indica to remediate phenanthrene (kind of PAHs ) , and cadmium (one of heavy metals ) co-contaminated soil by analyzing the plant growth, physiological parameters and chemical speciation in rhizosphere and non-rhizosphere . Results: T he presence of P. indica significantly increased plants tolerance, Chlorophyll a , Chlorophyll b , maximum quantum efficiency of PSII photochemistry and electron transport rate values in phenanthrene an d /or cadmium contaminated soil. P. indica inoculation in M edicago sativa root increased f luorescein diacetate activities in phenanthrene, cadmium and both of that co-contaminated soil, especially in non-rhizosphere . The presence of phenanthrene hindered the inoculated plant from accumulating cadmium to some extent ; Whereas the presence of cadmium did not hinder the degradation of phenanthrene in both rhizosphere and non-rhizosphere after P. indica colonization. Although the poor bioavailability of cadmium in rhizosphere restricted the transportation into stem, P. indica colonization in plant efficiently increased cadmium accumulation in root in cadmium and phenanthrene co-contaminated soil. Conclusions: In conclusion, t he work provides the theoretical basis that Piriformospora indica combined with Medicago sativa contributed to the remediation of PAH-Metal co-contaminated soil.

scholarly journals Heavy metal accumulation and antioxidant properties of Nephrolepis biserrata growing in heavy metal-contaminated soil

2015 ◽  
Vol 17 (3) ◽  
pp. 544-554 ◽  
Keyword(s):  
Heavy Metal ◽  
Contaminated Soil ◽  
Defense Mechanisms ◽  
Antioxidant Properties ◽  
Heavy Metal Stress ◽  
Industrial Area ◽  
Heavy Metal Accumulation ◽  
Metal Stress ◽  
Contaminated Site ◽  
Soil P

<div> <p>Antioxidant defense mechanisms are crucial for plants to survive under stress conditions. We investigated the capacity of a wild fern species, <em>Nephrolepis biserrata,</em> growing in the vicinity of industrial land to accumulate heavy metals, and assessed its antioxidative response under metal stress. The soils in this particular area were highly contaminated with zinc followed by lead and copper. As control, <em>N. biserrata</em> located 10 km away from the industrial area were collected and assessed. <em>N. biserrata</em> from the contaminated sites accumulated metals in their tissues in similar descending order of zinc&gt;lead&gt;copper. The values of bioaccumulation factor between 0 to 0.1 indicate <em>N. biserrata</em> as a moderate accumulator for the tested metals. For the enzymatic antioxidant assays, the activities of catalase and ascorbate peroxidase were significantly higher in <em>N. biserrata</em> from contaminated soil compared to control, while the activity of superoxide dismutase was not differ significantly in plants from both sites. We also detected higher contents of total phenolics and total flavonoids in <em>N. biserrata</em> collected from contaminated site compared to control. Our HPLC analysis revealed higher levels of myricetin and kaempferol in plant samples from the contaminated area. Our study verified the capacity of <em>N. biserrata</em> to scavenge oxygen radicals when exposed to heavy metal stress. Such ability to tolerate stressful condition suggests that the plant is a potential metal phytoremediator.&nbsp;</p> </div> <p>&nbsp;</p>

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