scholarly journals Cadmium Uptake and Growth Responses of Potted Vegetables to the Cd-Contaminated Soil Inoculated with Cd-Tolerant Purpureocillium lilacinum N1

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 622
Author(s):  
Yan Deng ◽  
Haonan Huang ◽  
Shaodong Fu ◽  
Luhua Jiang ◽  
Yili Liang ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Cost Effective ◽  
Fungal Strain ◽  
Growth Responses ◽  
Cd Uptake ◽  
Purpureocillium Lilacinum ◽  
Pot Experiments ◽  
Cost Effective Technique ◽  
Promote Plant Growth

Bioremediation of Cd- (cadmium) contaminated soil using Cd-tolerant fungus is considered an eco-friendly and cost-effective technique. In this study, we isolated one fungal strain that was hyper-tolerant to Cd from a highly polluted river and conducted pot experiments to evaluate its effects on bioremediation. We found that the fungal strain belonging to the genus, Purpureocillium lilacinum, tolerated 12,000 mg/L Cd. SEM manifested that Cd can be bioaccumulated on the crumpled mycelial surface, generating plenty of metal precipitation particles. In addition, pot experiments showed that the inoculation of P. lilacinum N1 could reduce the total Cd content in soil (2.09% in low contaminated soil and 12.56% in high contaminated soil) and greatly promote plant growth (2.16~3.13 times). Although the Cd concentration of plants was increased by 112.8% in low contaminated soil and decreased by 9.5% in highly contaminated soil with the inoculation of P. lilacinum N1, the total uptake of Cd by plants was greatly improved—1.84~3.6 times higher than that in CK groups. All our results suggest that P. lilacinum N1 is a valuable candidate for the bioremediation of Cd-contaminated soils because of its dual effects on the total Cd content in soil and Cd uptake in plants.

Clay Minerals as a Feasible Additive to Stabilize Cadmium in Contaminated Soils

2007 ◽  
Vol 336-338 ◽  
pp. 1906-1909 ◽  
Author(s):  
Zhen Qi Hu ◽  
Xiu Hong Yang ◽  
Ying Chun Zhang
Keyword(s):  
Clay Minerals ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Langmuir Model ◽  
Adsorption Behavior ◽  
Metal Concentrations ◽  
Pot Experiments ◽  
Maximum Sorption ◽  
Cadmium Contaminated Soil

The adsorption behavior of clay minerals in cadmium contaminated soils has been studied in order to remedy soils contaminated with this metal in this work. The results show that Langmuir model best describes the adsorption of Cd2+, and the maximum sorption values of 8.45 mg/g for bentonite, 5.69mg/g for sepiolite and 10.57mg/g for attapulgite are obtained at pH 5-6. In addition, the effect of clay minerals amendment on a highly cadmium contaminated soil has been studied by means of pot experiments. The results indicate that the metal concentrations in shoot and root of plant decreased with addition of clay minerals to soil (1%), and the highest decrease value of metal concentrations is obtained in the soils added by attapulgite amendment.

scholarly journals Bio Remedial Potential for the Treatment of Contaminated Soils

2021 ◽  
Vol 2 (4) ◽  
pp. 53-58
Author(s):  
Hasnain Raza ◽  
Keyword(s):  
Heavy Metal ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Anthropogenic Activities ◽  
Cost Effective ◽  
Polluted Soil ◽  
Soil Bioremediation ◽  
Environmental Threat ◽  
The World

As anthropogenic activities rise over the world, representing an environmental threat, soil contamination and treatment of polluted areas have become a worldwide concern. Bioremediation is a sustainable technique that could be a cost-effective mitigating solution for heavy metal-polluted soil regeneration. Due to the difficulties in determining the optimum bioremediation methodology for each type of pollutant and the lack of literature on soil bioremediation, we reviewed the main in-situ type, their current properties, applications, and techniques, plants, and microbe’s efficiency for treatment of contaminated soil. In this review, we describe the deeper knowledge of the in-situ types of bioremediation and their different pollutant accumulation mechanisms.

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.

scholarly journals Effect of biodegradable chelators on induced phytoextraction of uranium- and cadmium- contaminated soil by Zebrina pendula Schnizl

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Li Chen ◽  
Dan Wang ◽  
Chan Long ◽  
Zheng-xu Cui
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Rank Order ◽  
Single Plant ◽  
High Concentration ◽  
Control Groups ◽  
Cd Uptake ◽  
Translocation Factors ◽  
Induced Phytoextraction ◽  
Cadmium Contaminated Soil

AbstractThis study investigated the effect of ethylenediamine-N,N′-disuccinic acid (EDDS), oxalic acid (OA), and citric acid (CA) on phytoextraction of U- and Cd-contaminated soil by Z. pendula. In this study, the biomass of tested plant inhibited significantly following treatment with the high concentration (7.5 mmol·kg−1) EDDS treatment. Maximum U and Cd concentration in the single plant was observed with the 5 mmol·kg−1 CA and 7.5 mmol·kg−1 EDDS treatment, respectively, whereas OA treatments had the lowest U and Cd uptake. The translocation factors of U and Cd reached the maximum in the 5 mmol·kg−1 EDDS. The maximum bioaccumulation of U and Cd in the single plants was 1032.14 µg and 816.87 µg following treatment with 5 mmol·kg−1 CA treatment, which was 6.60- and 1.72-fold of the control groups, respectively. Furthermore, the resultant rank order for available U and Cd content in the soil was CA > EDDS > OA (U) and EDDS > CA > OA (Cd). These results suggested that CA could greater improve the capacity of phytoextraction using Z. pendula in U- and Cd- contaminated soils.

scholarly journals Biotransformation of Chromium (VI) via a Reductant Activity from the Fungal Strain Purpureocillium lilacinum

2021 ◽  
Vol 7 (12) ◽  
pp. 1022
Author(s):  
Juan Fernando Cárdenas González ◽  
Ismael Acosta Rodríguez ◽  
Yolanda Terán Figueroa ◽  
Patricia Lappe Oliveras ◽  
Rebeca Martínez Flores ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Temperature Effect ◽  
Contaminated Soil ◽  
Protein Concentration ◽  
Industrial Effluents ◽  
Fungal Strain ◽  
Electron Donors ◽  
Purpureocillium Lilacinum ◽  
Chromium Vi ◽  
Optimal Ph

Industrial effluents from chromium-based products lead to chromium pollution in the environment. Several technologies have been employed for the removal of chromium (Cr) from the environment, including adsorption, ion-exchange, bioremediation, etc. In this study, we isolated a Cr (VI)-resistant fungus, Purpureocillium lilacinum, from contaminated soil, which could reduce chromium. We also characterized a reductant activity of dichromate found in the cellular fraction of the fungus: optimal pH and temperature, effect of enzymatic inhibitors and enhancers, metal ions, use of electron donors, and initial Cr (VI) and protein concentration. This study also shows possible mechanisms that could be involved in the elimination of this metal. We observed an increase in the reduction of Cr (VI) activity in the presence of NADH followed by that of formate and acetate, as electron donor. This reduction was highly inhibited by EDTA followed by NaN3 and KCN, and this activity showed the highest activity at an optimal pH of 7.0 at 37 °C with a protein concentration of 3.62 µg/mL.

scholarly journals Remediation of cadmium by Indian mustard (Brassica juncea L.) from cadmium contaminated soil: a phytoextraction study

2014 ◽  
Vol 3 (2) ◽  
pp. 229-237 ◽  
Author(s):  
Rajeev Kumar Bhadkariya ◽  
VK Jain ◽  
GPS Chak ◽  
SK Gupta
Keyword(s):  
Brassica Juncea ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Low Cost ◽  
Indian Mustard ◽  
Translocation Factor ◽  
Toxic Metal ◽  
Cost Effective ◽  
Cadmium Metal ◽  
Living Organisms

Cadmium is a toxic metal for living organisms and an environmental contaminant. Soils in many parts of the world are slightly too moderately contaminated by Cd due to long term use and disposal of Cd-contaminated wastes. Cost effective technologies are needed to remove cadmium from the contaminated sites. Soil phytoextraction is engineering based, low cost and socially accepted developing technology that uses plants to clean up contaminants in soils. This technology can be adopted as a remediation of cadmium from Cd-contaminated soils with the help of Brassica juncea plant. The objective of this work was to evaluate the cadmium (Cd) accumulate and the tolerance of Brassica juncea. The Cd accumulates in all parts of plants (roots, stems and leaves). It was found that accumulating efficiency increased with the increase in the concentration of applied cadmium metal solution. Maximum accumulation of cadmium was found in roots than stem and leaves. Phytoextraction coefficient and translocation factor were highest to show the validity of the Brassica juncea species for hyperaccumulation of the Cd metal. These results suggested that Brassica juncea has a high ability to tolerate and accumulate Cd, so it might be a promising plant to be used for phytoextraction of Cd contaminated soil. DOI: http://dx.doi.org/10.3126/ije.v3i2.10533 International Journal of the Environment Vol.3(2) 2014: 229-237

scholarly journals In situ phytoremediation of copper and cadmium in a co-contaminated soil and its biological and physical effects

RSC Advances ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 993-1003 ◽  
Author(s):  
Lei Xu ◽  
Xiangyu Xing ◽  
Jiani Liang ◽  
Jianbiao Peng ◽  
Jing Zhou
Keyword(s):  
Heavy Metal ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Cost Effective ◽  
Potential Cost ◽  
Effective Technology ◽  
Physical Effects

Phytoremediation is a potential cost-effective technology for remediating heavy metal-contaminated soils.

Stabilization of Multiple Heavy Metal Contaminated Soils Using Biological Materials

2014 ◽  
Vol 541-542 ◽  
pp. 329-333 ◽  
Author(s):  
Chi Zhang ◽  
Zhong Zhong ◽  
Ying Jun Sun ◽  
Hui Min Lao
Keyword(s):  
Heavy Metal ◽  
Soil Remediation ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Soil Stabilization ◽  
Cost Effective ◽  
Biological Materials ◽  
Bone Meal ◽  
Short Period ◽  
Shell Powder

Heavy metal stabilization is a promising technology of soil remediation with short period and easy operation that has seen a recent explosion of interest. The effectiveness of Pb2+, Cu2+, Zn2+ and Ni2+ stabilization upon the waste biologic materials addition was investigated in this study. A contrast experiment was performed with materials including shell powder, bone meal and biochar. The results showed that biologic stabilizers have good stabilization ability of heavy metals in soil. The 2.5 wt.% shell powder and 2.5 wt.% bone meal treatment was the most effective, with solid stabilization performance on Pb2+, Cu2+, Zn2+ and Ni2+ by reduce the heavy metal cations over 87.69%, 92.40%, 63.37% and 80.32% respectively. The combination of shell powder and bone meal improved the rate of multiple heavy metal contaminated soil stabilization, while decreased alkalization of soil. In addition, the average production cost of mixed stabilizers in this study was around 1800 RMB/ton, with average of 200 RMB/ton remediation cost for heavy metal contaminated soil stabilization using these additives. The success of the mixed stabilizers with biological materials showed a promising and cost-effective approach for multiple heavy metal contaminated soil remediation.

Plant enhancement of indigenous soil micro-organisms: a low-cost treatment of contaminated soils

Polar Record ◽  
1999 ◽  
Vol 35 (192) ◽  
pp. 33-40 ◽  
Author(s):  
C. M. Reynolds ◽  
D. C. Wolf ◽  
T. J. Gentry ◽  
L. B. Perry ◽  
C. S. Pidgeon ◽  
...  
Keyword(s):  
Field Study ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Low Cost ◽  
Cost Effective ◽  
Field Studies ◽  
The United States ◽  
Paspalum Notatum ◽  
Cost Treatment ◽  
Microbial Numbers

AbstractThe United States has more than 1000 individual areas of petroleum-contaminated soil at formerly used defense (FUD) sites located in cold regions. This paper investigates biotreatment systems based on exploiting naturally occurring phenomena in the rhizosphere — the soil adjacent to and influenced by plant roots. Rhizosphere-based remediation systems would be inexpensive to implement and maintain and would be applicable to remote or permafrost sites. Herein, this paper provides the rationale for using rhizosphere-based biotreatment systems and some initial results. In both laboratory and field studies, successful plant germination, plant growth, and root intrusion into and through contaminated soil are demonstrated.Using a Captina silt loam in a 10-week laboratory study, the effects of vegetation and contamination on microbial numbers were compared. The vegetation treatments included an unvegetated control and a vegetated treatment seeded with bahiagrass (Paspalum notatum). The contamination treatments included an uncontaminated control and a treatment with 2000 mg pyrene kg-1 soil added. Microbial numbers at 10 weeks were not significantly influenced by the contaminant level of 2000 mg pyrene kg-1 soil compared to the control. However, microbial numbers were greater in the rhizosphere of the bahiagrass-vegetated soil compared to the unvegetated soil.In a 34-week field study, total petroleum hydrocarbon (TPH) concentrations of a diesel-contaminated soil decreased significantly more in the rhizosphere+nutrient treatment compared to the control that was not vegetated or fertilized. Bacterial numbers in the field study were 287 times greater in the rhizosphere+nutrient treated soils than in the control treatments. Measurable TPH compounds in the plant tissue were insignificant. The data demonstrated that rhizosphereenhanced treatment of organic-contaminated soils can be effective in reducing soil petroleum concentrations and may be a cost-effective strategy particularly suited for treating cold-region sites where remediation options are limited by cost, remoteness of the site, and/or brevity of the treatment season.

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