scholarly journals Phytoremediation - a green technology adapted to eradication of harmful heavy toxic metals from contaminated soil

2021 ◽  
Vol 8 (1) ◽  
pp. 26
Author(s):  
Neha Thakur ◽  
Munish Sharma ◽  
Munish Sharma
Keyword(s):  
Toxic Metals ◽  
Contaminated Soil ◽  
Green Technology

scholarly journals Biodegradation of Used Motor Oil in Soil Using Organic Waste Amendments

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
O. P. Abioye ◽  
P. Agamuthu ◽  
A. R. Abdul Aziz
Keyword(s):  
Contaminated Soil ◽  
Oil Pollution ◽  
Green Technology ◽  
Lubricating Oil ◽  
Soil Bioremediation ◽  
Order Kinetic ◽  
Human Beings ◽  
Mushroom Compost ◽  
Oil Biodegradation ◽  
Used Lubricating Oil

Soil and surface water contamination by used lubricating oil is a common occurrence in most developing countries. This has been shown to have harmful effects on the environment and human beings at large. Bioremediation can be an alternative green technology for remediation of such hydrocarbon-contaminated soil. Bioremediation of soil contaminated with 5% and 15% (w/w) used lubricating oil and amended with 10% brewery spent grain (BSG), banana skin (BS), and spent mushroom compost (SMC) was studied for a period of 84 days, under laboratory condition. At the end of 84 days, the highest percentage of oil biodegradation (92%) was recorded in soil contaminated with 5% used lubricating oil and amended with BSG, while only 55% of oil biodegradation was recorded in soil contaminated with 15% used lubricating oil and amended with BSG. Results of first-order kinetic model to determine the rate of biodegradation of used lubricating oil revealed that soil amended with BSG recorded the highest rate of oil biodegradation (0.4361 day−1) in 5% oil pollution, while BS amended soil recorded the highest rate of oil biodegradation (0.0556 day−1) in 15% oil pollution. The results of this study demonstrated the potential of BSG as a good substrate for enhanced remediation of hydrocarbon contaminated soil at low pollution concentration.

scholarly journals Phytoremediation Potential of Iris spp.

2021 ◽  
Vol 78 (1) ◽  
pp. 1
Author(s):  
Ioana CRIȘAN ◽  
Roxana VIDICAN ◽  
Anca PLEȘA ◽  
Tania MIHĂIESCU
Keyword(s):  
Wastewater Treatment ◽  
Toxic Metals ◽  
Petroleum Hydrocarbons ◽  
Relevant Literature ◽  
Green Technology ◽  
Value Chains ◽  
Mining Activities ◽  
Traditional Use ◽  
Sustainable Value ◽  
History Of

Iris plants are widely cultivated flowering ornamentals, with a long history of traditional use in Eurasia, where this genus is reaching the highest diversity. This paper aims to provide an overview on recent advances related to the phytoremediation potential of plants from the genus Iris, in order to promote the use of these species in phytoremediation programs. According to the relevant literature, eight species from genus Iris present phytoremediation potential (I. dichotoma, I. germanica, I. halophila, I. lactea, I. latifolia, I. pseudacorus, I. sibirica, I. wilsonii). The studies addressed potential of plants to mitigate toxic metals/metalloids (As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Zn), excess of nutrients (P, N), pesticides, petroleum hydrocarbons, pharmaceuticals as well as dyes. Most studies focused on wastewater treatment and environments contaminated due to mining activities. Main hindrances in upscaling this green technology remain mitigation of toxicity stress in plants during remediation and the disposal of resulting contaminated biomass. In this sense, use of beneficial microorganisms to alleviate phytotoxicity effects and new valorization possibilities of contaminated Iris spp. biomass have been proposed recently. Designing an entire cycle that includes phytoremediation and sustainable value chains for contaminated biomass could prove feasible and should receive more attention.

scholarly journals Soil Washing and Effluent Treatment for Contaminated Soil with Toxic Metals

2013 ◽  
Vol 51 (6) ◽  
pp. 745-754 ◽  
Author(s):  
Jung-Seok Yang ◽  
Jin-Min Hwang ◽  
Kitae Baek ◽  
Man Jae Kwon
Keyword(s):  
Toxic Metals ◽  
Contaminated Soil ◽  
Soil Washing ◽  
Effluent Treatment

scholarly journals Overview of Approaches to Improve Rhizoremediation of Petroleum Hydrocarbon-Contaminated Soils

2021 ◽  
Vol 1 (2) ◽  
pp. 329-351
Author(s):  
Fahad Alotaibi ◽  
Mohamed Hijri ◽  
Marc St-Arnaud
Keyword(s):  
Contaminated Soil ◽  
Organic Contaminants ◽  
Contaminated Soils ◽  
Current Knowledge ◽  
Abiotic Factors ◽  
Cost Effective ◽  
Plant Growth Promoting Rhizobacteria ◽  
Green Technology ◽  
Plant Growth Promoting ◽  
Plant Microbiome

Soil contamination with petroleum hydrocarbons (PHCs) has become a global concern and has resulted from the intensification of industrial activities. This has created a serious environmental issue; therefore, there is a need to find solutions, including application of efficient remediation technologies or improvement of current techniques. Rhizoremediation is a green technology that has received global attention as a cost-effective and possibly efficient remediation technique for PHC-polluted soil. Rhizoremediation refers to the use of plants and their associated microbiota to clean up contaminated soils, where plant roots stimulate soil microbes to mineralize organic contaminants to H2O and CO2. However, this multipartite interaction is complicated because many biotic and abiotic factors can influence microbial processes in the soil, making the efficiency of rhizoremediation unpredictable. This review reports the current knowledge of rhizoremediation approaches that can accelerate the remediation of PHC-contaminated soil. Recent approaches discussed in this review include (1) selecting plants with desired characteristics suitable for rhizoremediation; (2) exploiting and manipulating the plant microbiome by using inoculants containing plant growth-promoting rhizobacteria (PGPR) or hydrocarbon-degrading microbes, or a combination of both types of organisms; (3) enhancing the understanding of how the host–plant assembles a beneficial microbiome, and how it functions, under pollutant stress. A better understanding of plant–microbiome interactions could lead to successful use of rhizoremediation for PHC-contaminated soil in the future.

Changes of toxic metals during biological stabilization and their potential ecological risk assessment

2015 ◽  
Vol 72 (10) ◽  
pp. 1713-1722 ◽  
Author(s):  
Hou-cheng Wang ◽  
Zheng-zhong Zeng ◽  
He-fei Zhang ◽  
Zhong-ren Nan
Keyword(s):  
Toxic Metals ◽  
Contaminated Soil ◽  
Steel Slag ◽  
Toxic Metal ◽  
Potential Ecological Risk ◽  
Ecological Index ◽  
Mn Oxide ◽  
Control Technologies ◽  
The Stability

With various disadvantages of pollution control technologies for toxic metal-contaminated soil, we mixed contaminated soil with sludge for in situ composting to stabilize toxic metals, so plants are enriched to take up the toxic metals. When simulating the above, we added toxic metal solution into sewage sludge, and then composed it with steel slag to determine inhibition of the availability of toxic metals. When toxic metals were added into sludge, the potential ecological index and geoaccumulation index of Cd became high while Zn was low. Steel slag had an inhibited availability of Cd, and when the adjunction of steel slag was 7%, the availability of Cd was lowest. Steel slag promoted the availability of Zn, and when the adjunction of steel slag was 27%, the availability of Zn was highest. Results showed that during composting, with increasing steel slag, Cd stabilizing time was reached sooner but Zn stabilizing time was slower, and the availability of all metals became lower. In the end, composting inhibited the potential ecological index of Cd, but it promoted the potential ecological index of Zn. Steel slag promoted the stability of Cd and Zn as Fe/Mn oxide-bound and residual species. Therefore, composting sludge and steel slag could be used as an effective inhibitor of Zn and Cd pollution.

PHYTOREMEDIATION OF CADMIUM-CONTAMINATED SOIL BY BRASSICA SPECIES

2001 ◽  
Vol 49 (4) ◽  
pp. 351-360 ◽  
Author(s):  
K. S. AHMED ◽  
◽  
Keyword(s):  
Brassica Juncea ◽  
Contaminated Soil ◽  
Indian Mustard ◽  
Chelating Agent ◽  
Brassica Species ◽  
Green Technology ◽  
Tetraacetic Acid ◽  
Toxic Heavy Metals ◽  
Stem Leaf ◽  
Cadmium Contaminated Soil

Phytoremediation is a green technology for the sustainable remediation of surface soils contaminated with toxic heavy metals. When added to soils the chelating agent ethylenediamine tetraacetic acid (EDTA) increased the solubility of heavy elements for plant uptake during phytoremediation. A greenhouse experiment was carried out with two Brassica species (Brassica juncea and Brassica carinata) grown on artificially contaminated soil (20 and 40 mg Cd kg-1) with EDTA added at a rate of 1 g kg-1 soil. With increasing Cd (0, 20 and 40 mg Cd kg-1 soil) contamination the biomass of both the Brassica species decreased. However, Brassica juncea was more tolerant of high levels of Cd in the soil in comparison to B. carinata. The results indicated that EDTA made the cadmium more available to the plants and lowered the Cd content of the soil. The magnitude of the increase in tissue (stem, leaf and root) Cd concentration was higher in B.juncea than in B. carinata and after the application of chelating agent (EDTA). The Brassica juncea species of Indian mustard has better potential for the phytoremediation of soil heavily contaminated with Cd (40 mg Cd kg-1 soil).

scholarly journals Phytoremediation of hydrocarbon-contaminated soils with emphasis on the effect of petroleum hydrocarbons on the growth of plant species

2009 ◽  
Vol 89 (1) ◽  
pp. 21-29 ◽  
Author(s):  
Ravanbakhsh Shirdam ◽  
Ali Daryabeigi Zand ◽  
Gholamreza Nabi Bidhendi ◽  
Nasser Mehrdadi
Keyword(s):  
Plant Species ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Petroleum Hydrocarbons ◽  
Petroleum Hydrocarbon ◽  
Green Technology ◽  
Hydrocarbon Contamination ◽  
Total Petroleum Hydrocarbons ◽  
Control Treatment ◽  
Polluted Soils

To date, many developing countries such as Iran have almost completely abandoned the idea of decontaminating oil-polluted soils due to the high costs of conventional (physical/chemical) soil remediation methods. Phytoremediation is an emerging green technology that can become a promising solution to the problem of decontaminating hydrocarbon-polluted soils. Screening the capacity of native tolerant plant species to grow on aged, petroleum hydrocarbon-contaminated soils is a key factor for successful phytoremediation. This study investigated the effect of hydrocarbon pollution with an initial concentration of 40 000 ppm on growth characteristics of sorghum (Sorghum bicolor) and common flax (Linum usitatissumum). At the end of the experiment, soil samples in which plant species had grown well were analyzed for total petroleum hydrocarbons (TPHs) removal by GC-FID. Common flax was used for the first time in the history of phytoremediation of oil-contaminated soil. Both species showed promising remediation efficiency in highly contaminated soil; however, petroleum hydrocarbon contamination reduced the growth of the surveyed plants significantly. Sorghum and common flax reduced TPHs concentration by 9500 and 18500 mg kg‑1, respectively, compared with the control treatment.

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