Effect of plant extracts and citric acid on phytoremediation of metal-contaminated soil

Li, Yaqian; Wang, Yajun; Khan, Mahnoor; Luo, Wenxuan; Xiang, Zichen; Xu, Weizhou; Zhong, Beilong; Ma, Jing; Ye, Zhengqian; Zhu, Youwei; Duan, Lili; Liu, Dan

doi:10.1016/j.ecoenv.2021.111902

Cited by 34 publications

(12 citation statements)

References 23 publications

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“…Activating agents can be successfully applied to improve phytoremediation activity. Li et al [ 168 ] described an improved efficiency of extraction technology by Sedum alfredii in experiments, where the effects of two plant extracts (i.e., Oxalis corniculata , OX, and Medicago sativa extract, ME) and citric acid were tested. The application of these three activating agents was beneficial for the decontamination of Cd and Zn in soils, showing an improved repairing efficiency by 3.92, 3.37, 3.33 times and 0.44, 0.20, 0.86 times, respectively.…”

Section: Pbs For Phytoremediationmentioning

confidence: 99%

Use of Biostimulants as a New Approach for the Improvement of Phytoremediation Performance—A Review

Bartucca

Cerri

Buono

et al. 2022

Plants

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Environmental pollution is one of the most pressing global issues, and it requires priority attention. Environmental remediation techniques have been developed over the years and can be applied to polluted sites, but they can have limited effectiveness and high energy consumption and costs. Bioremediation techniques, on the other hand, represent a promising alternative. Among them, phytoremediation is attracting particular attention, a green methodology that relies on the use of plant species to remediate contaminated sites or prevent the dispersion of xenobiotics into the environment. In this review, after a brief introduction focused on pollution and phytoremediation, the use of plant biostimulants (PBs) in the improvement of the remediation effectiveness is proposed. PBs are substances widely used in agriculture to raise crop production and resistance to various types of stress. Recent studies have also documented their ability to counteract the deleterious effects of pollutants on plants, thus increasing the phytoremediation efficiency of some species. The works published to date, reviewed and discussed in the present work, reveal promising prospects in the remediation of polluted environments, especially for heavy metals, when PBs derived from humic substances, protein and amino acid hydrolysate, inorganic salts, microbes, seaweed, plant extracts, and fungi are employed.

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Section: Pbs For Phytoremediationmentioning

confidence: 99%

Use of Biostimulants as a New Approach for the Improvement of Phytoremediation Performance—A Review

Bartucca

Cerri

Buono

et al. 2022

Plants

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“…The conclusion from the analysis, that the higher the concentration of citric acid, the higher the decrease in pH (Figure 27). In a previous study, it was also mentioned that the application of citric acid with doses of 1.3 and 5 mmol on average reduced the pH to 0.49 in the 2 weeks of the experiment [22].…”

Section: Analysis To Soil Phmentioning

confidence: 88%

Phytoremediation of Lead Contaminated Land Using Vetiver zizanoides and Citric Acid as Chelating Agent

2022

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Environmental pollution due to hazardous waste in Karangdawa, Margasari, Tegal has an impact on soil and groundwater quality. Lead found in the soil exceeds the permissible standards. It is necessary to recover soil from Lead because it can enter food crops and accumulate in the human body. Phytoremediation is commonly used in land remediation because it’s economical and doesn’t cause secondary environmental problems. One of the ways to optimize Phytoremediation is by using chelating agents. The purpose of the study was to analyze the ability of Vetiver zizanoides and analyze the most optimum dose variation of Citric acid to uptake Lead to the plant. The ability of Vetiver zizanoides and Citric acid as metal chelators in Pb uptake was investigated for 28 days with Citric acid doses of 0.5 g/kg, 1 g/kg, and 2 g/kg. Analysis of Lead concentration in roots, stems, and soil using AAS. From the results of the study, Vetiver zizanoides was able to survive from Lead exposure up to 4979.8 ppm. Application 1 g/kg of Citric acid in the soil, increased the bioconcentration, and bioaccumulation compared to control plants. The results indicated that the addition of Citric acid as a chelating agent could increase the function of Vetiver zizanoides as a phytoremediation agent.

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“…It can be seen that moderate levels of acetic acid are the most beneficial for increasing the shoot and root dry weights of oilseed sunflower. Studies have shown that the application of high concentrations of organic acids can result in a significant decrease of plant biomass [66,67], which may be due to the fact that high concentrations of organic acids exceed the plant's tolerance range, impairing its growth and leading to the inhibition of lateral root development near the plant's root tip, as well as to an inability of the plant's root system to absorb nutrients properly due to the combination with Cd ions in the soil, thus resulting in a decrease of biomass [68]. Therefore, the effects of acetic acid on plant growth and biomass are different under different application times and concentrations.…”

Section: Discussionmentioning

confidence: 99%

Optimizing Acetic Acid Application Strategy Can Effectively Promote the Remediation Performance of Oilseed Sunflower on Cd-Contaminated Soils

et al. 2022

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Applying exogenous organic acids is an effective method to improve the remediation efficiency of Cd-contaminated soils. To investigate the effects of exogenous acetic acid on Cd forms in rhizosphere soils and phytoremediation performance for Cd-contaminated soils, a potted experiment was performed with oilseed sunflower as the extractive plant. Acetic acid was applied at 1, 2, 3, 4, 5, and 6 mmol/kg at 20, 30, 40, and 50 days after seedling emergence. Soil without acetic acid was used as a control (CK). Emblematic chemical properties and different Cd forms in rhizosphere soils were inspected. Results showed that adding acetic acids improved the biomass of shoot and root; it increased firstly and then decreased with the increase of acetic acid concentrations. For all treatments, acetic acids increased sucrase activity and catalase activity but decreased amylase activity in rhizosphere soils. At 30 or 40 days after seedling emergence, the exchangeable Cd content, Fe-Mn oxide Cd content, and organic Cd content were lower, while the carbonate Cd content was greater. Adding acetic acids improved the removal rate of Cd, and when 1 mmol/kg acetic acid was applied at 40 days after seedling emergence, it was increased by 60%, which was the highest compared to CK. RDA showed that catalase activity, sucrase activity, carbonate Cd, and pH could promote the growth of oilseed sunflower, while organic Cd, Fe-Mn oxide Cd, total Cd, exchangeable Cd, and amylase activity inhibited the growth of oilseed sunflower. These findings suggest that acetic acid can improve the efficiency of phytoremediation in Cd-contaminated soils. In particular, the treatment with 1 mmol/kg acetic acid at 40 days after seedling emergence had the most obvious effect.

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Effect of plant extracts and citric acid on phytoremediation of metal-contaminated soil

Cited by 34 publications

References 23 publications

Use of Biostimulants as a New Approach for the Improvement of Phytoremediation Performance—A Review

Use of Biostimulants as a New Approach for the Improvement of Phytoremediation Performance—A Review

Phytoremediation of Lead Contaminated Land Using Vetiver zizanoides and Citric Acid as Chelating Agent

Optimizing Acetic Acid Application Strategy Can Effectively Promote the Remediation Performance of Oilseed Sunflower on Cd-Contaminated Soils

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