Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals

Hu, Pengjie; Bingfan, Yang; Dong, Chunyan; Chen, Like; Cao, Xueying; Zhao, Jie; Wu, Longhua; Luo, Yongming; Christie, Peter

doi:10.1016/j.chemosphere.2014.08.081

Cited by 84 publications

(31 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results indicated that acid rain has the characteristic to promote the leaching of Cd and Pb, consistent with the results of Zheng et al [20]. The average concentration of Cd in leachate with EDTA was 1.253 mg/L which was 4.21-fold of not adding one, which indicated that EDTA can effectively promote the Cd leaching, consistent with the study of Hu et al [21], whose experiments showed that EDTA has the ability to promote the leaching efficiency from 35-53% to 62-80%. For further comparison, EDTA was more effective on Pb leaching than Cd, which was 35.45-fold of Cd.…”

Section: The Change Of the Concentration Of Hms In Leachatesupporting

confidence: 91%

The Leaching Characteristics of Chelant-Enhanced Phytoextraction of Cd and Pb Contaminated Soil with Simulated Acid Rain

Lu¹,

Luo²,

Liu³

et al. 2016

Proceedings of the 2016 International Conference on Civil, Transportation and Environment

View full text Add to dashboard Cite

A soil column-cultivation leaching experiment was conducted in greenhouse to expose the HMs leaching characteristics in the process of EDTA-enhanced Phytoremediation of Cd-Pb compound contaminated soil by Zea mays L.(in seedling stage) under the condition of acid rain. Results showed that: (1) In the chelant-enhanced phytoremediation system , both EDTA and acid rain can accelerate HMs phytoextraction and promote Cd and Pb leakage, but EDTA was more effective than simulated acid rain. (2) In the process of rain leaching, the Cd and Pb concentration in the leachate decreased linearly along with the rainfall increased. The leaching rate of Cd and Pb with EDTA was 5.40-and 87.82-fold of control (without the application of a chelator).In the acid rain-Zea mays L.-chelant (EDTA)-enhanced phytoremediation system of Cd-Pb contaminated soil, EDTA and acid rain all have the characteristics of promoting Cd and Pb activation, but the leakage of HMs (especially Pb) depends mainly on the activation rate of EDTA to HMs, and might be closely related to the dosage and usage of chelating agent.

show abstract

Section: The Change Of the Concentration Of Hms In Leachatesupporting

confidence: 91%

The Leaching Characteristics of Chelant-Enhanced Phytoextraction of Cd and Pb Contaminated Soil with Simulated Acid Rain

Lu¹,

Luo²,

Liu³

et al. 2016

Proceedings of the 2016 International Conference on Civil, Transportation and Environment

View full text Add to dashboard Cite

show abstract

“…The results of the column experiments described above showed that Cd, Zn, and Pb were also leached in the early stages of the experiment, after which their concentrations in the leachate continually decreased [24][25][26][27][28][29]. It is likely that the metals were present in highly soluble forms and immediately dissolved into the acid solutions and were leached [27].…”

Section: Discussionmentioning

confidence: 99%

Immobilization of Cd, Zn, and Pb from Soil Treated by Limestone with Variation of pH Using a Column Test

Yun

2015

Journal of Chemistry

View full text Add to dashboard Cite

Decades of mining in South Korea have resulted in the contamination of large amounts of soil by metals. The most feasible approach to site restoration requires the use of a stabilization agent to reduce metal mobility. This study examined the leaching characteristics of limestone used as a stabilization agent when subjected to solutions of differing pH. In a laboratory-scale column test, solutions with pH values of 3.5, 4.6, and 5.6, representing acidic to nonacidic rainfall, were applied to soil mixed with limestone. Test results indicate that metal components can be released with the addition of acidic solutions, even if the soil is highly alkaline. Cd and Zn, in particular, exhibited abrupt or continuous leaching when exposed to acid solutions, indicating the potential for contamination of water systems as metal-laden soils are exposed to the slightly acidic rainfall typical of South Korea. Treatment using stabilization agents such as limestone may reduce leaching of metals from the contaminated soil. Stabilizing metal-contaminated farmland is an economical and feasible way to reduce pollutants around abandoned metal mines.

show abstract

“…Soil washing is a rapid, permanent, effective chemical method for Pb remediation with long term liability [199]. Hu et al [200] achieved removal of 73% Pb using EDTA as a chelating agent. Wang et al [201] used iminodisuccinic acid, glutamate-N, N-diacetic acid, glucomonocarbonic acid, and polyaspartic acid to extract 53% and 55% Pb from Pb-Zn contaminated soil.…”

Section: Soil Washingmentioning

confidence: 99%

Lead Toxicity: Health Hazards, Influence on Food Chain, and Sustainable Remediation Approaches

Kumar

Pinto

Chaturvedi

et al. 2020

IJERPH

625

229

View full text Add to dashboard Cite

Lead (Pb) toxicity has been a subject of interest for environmental scientists due to its toxic effect on plants, animals, and humans. An increase in several Pb related industrial activities and use of Pb containing products such as agrochemicals, oil and paint, mining, etc. can lead to Pb contamination in the environment and thereby, can enter the food chain. Being one of the most toxic heavy metals, Pb ingestion via the food chain has proven to be a potential health hazard for plants and humans. The current review aims to summarize the research updates on Pb toxicity and its effects on plants, soil, and human health. Relevant literature from the past 20 years encompassing comprehensive details on Pb toxicity has been considered with key issues such as i) Pb bioavailability in soil, ii) Pb biomagnification, and iii) Pb- remediation, which has been addressed in detail through physical, chemical, and biological lenses. In the review, among different Pb-remediation approaches, we have highlighted certain advanced approaches such as microbial assisted phytoremediation which could possibly minimize the Pb load from the resources in a sustainable manner and would be a viable option to ensure a safe food production system.

show abstract

Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals

Cited by 84 publications

References 32 publications

The Leaching Characteristics of Chelant-Enhanced Phytoextraction of Cd and Pb Contaminated Soil with Simulated Acid Rain

The Leaching Characteristics of Chelant-Enhanced Phytoextraction of Cd and Pb Contaminated Soil with Simulated Acid Rain

Immobilization of Cd, Zn, and Pb from Soil Treated by Limestone with Variation of pH Using a Column Test

Lead Toxicity: Health Hazards, Influence on Food Chain, and Sustainable Remediation Approaches

Contact Info

Product

Resources

About