Integrating EDDS-enhanced washing with low-cost stabilization of metal-contaminated soil from an e-waste recycling site

Beiyuan, Jingzi; Tsang, Daniel C.W.; Ok, Yong Sik; Zhang, Weihua; Yang, Xin; Baek, Kitae; Li, Xiangzhong

doi:10.1016/j.chemosphere.2016.06.030

Cited by 65 publications

(9 citation statements)

References 52 publications

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“…Soil contaminated with heavy metals is a major, worldwide environmental problem as anthropogenic activities intensify (Domínguez et al ., ), which can pose a long‐term risk to biological systems (Kim et al ., ). Chelator‐assisted soil washing has been widely investigated to develop effective soil remediation strategies for contaminated soil (Zhang & Tsang, ; Beiyuan et al ., ). Ethylenediaminetetraacetic acid disodium salt (Na 2 EDTA) is the most extensively studied chelator because of its strong capability to extract various heavy metals by a rapid, thermodynamically favourable complexation and a slow Na 2 EDTA‐promoted dissolution (Zhang et al ., ; Satyro et al ., ; Wang et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Remediation of sandy soil contaminated by heavy metals with Na₂EDTA washing enhanced with organic reducing agents: element distribution and spectroscopic analysis

Wei

Chen

Wang

2018

European J Soil Science

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Summary Washing with Na2EDTA is insufficient to remove both cationic and anionic metal species in contaminated soil. Therefore, washing with Na2EDTA enhanced with organic reducing agents was tested as a means to improve the efficiency of removal of heavy metals and to investigate its effect on the spectroscopic characteristics of contaminated soil. The results indicated that washing with Na2EDTA enhanced with organic reducing agents was effective in removing both arsenic and cationic metals from contaminated soil at the initial pH of the mixed washing agents. The increase in removal efficiencies (compared with a single Na2EDTA washing) under this washing regime was 19–31% for arsenic, 6–19% for cadmium, 3–12% for copper and 6–21% for lead in two samples. The results of metal fractionation indicated that the addition of either oxalic or ascorbic acids could increase the relative proportion of the residual fraction to varying degrees. The spectroscopic analysis demonstrated that these acids were effective in removing metals by dissolving soil minerals, such as amorphous iron oxides, and reducing mineral oxides. The X‐ray photoelectron spectroscopy (XPS) study showed that more Fe(III) was transformed to Fe(II) under Na2EDTA washing enhanced with oxalic acid than with ascorbic acid, and the dissolution of silicon oxides was very limited in the presence of either of these acids. Washing with Na2EDTA enhanced by both oxalic and ascorbic acid of the sampled soils improved removal efficiencies; properties of the washing agent, the physicochemical properties of samples and the pollution characteristics (e.g. the amounts of contamination and metal fractions) combined to influence the effect of washing. Highlights Washing with Na2EDTA and oxalic or ascorbic acids was effective in extracting arsenic and cationic metals. Oxalic acid was more effective than ascorbic acid in transforming Fe(III) to Fe(II). Addition of organic reducing acids increased the relative proportion of the residual fraction of metals. Metal removal was affected by dissolution of minerals such as scorodite, muscovite and feldspar.

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Section: Introductionmentioning

confidence: 97%

Remediation of sandy soil contaminated by heavy metals with Na₂EDTA washing enhanced with organic reducing agents: element distribution and spectroscopic analysis

Wei

Chen

Wang

2018

European J Soil Science

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“…The pollution in the sewage irrigation area was distributed in bands. The spatial characteristics were caused by many factors such as soil parent material, agricultural activities and industrial activities 45 , 46 . Different cities have different degrees of heavy metal accumulation due to their own characteristics.…”

Section: Resultsmentioning

confidence: 99%

Comprehensive assessment of harmful heavy metals in contaminated soil in order to score pollution level

Zhao

Lan³

et al. 2022

Sci Rep

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Soil-related problems have grown up to be a major threat to human society. Scientific evaluation is helpful to understand the status of soil pollution and provide reference to further work. In this situation, Liaoning Province, a typical industrial and agricultural province in Northeast China, was selected as a case study region. It reviewed 200 studies published between 2010 and 2020 and recorded related data of soil heavy metal. It used model method and index method to evaluate the agricultural region. The comprehensive assessment score of Liaoning pollution level was 0.8998. Dalian was 0.9536, ranking first among the 14 cities. Huludao and Jinzhou were 0.7594 respectively, ranked the last. Heavy metal accumulation in different cities stemmed from different sources, including weathering of parent materials, industrial wastes, sewage irrigation, and mining activities. In general, the pollution level of heavy metal in Liaoning was at low risk level, but it still needs to pay attention to the health risk of heavy metal and the input of heavy metal into the soil, especially cadmium (Cd). This study provides a comprehensive assessment of soil heavy metal pollution in Liaoning, while identifying policy recommendations for pollution mitigation and environmental management.

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“…The effectiveness of using fly ash as the material for biochar blending is supported by Beiyuan et al (2016) which stated that the fly ash is chosen to blend ________________________________________________ Egypt. J. Chem.…”

Section: Brunauer-emmet-teller (Bet) Surface Area Methodsmentioning

confidence: 99%

Characterization of Hydrogel and Fly Ash from Biomass

et al. 2021

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This study aims to produce an efficient adsorbent derived from 4 different biomass and to study the characterization of blending hydrogel from 4 different biomass. Type of material used to produce biochar is corn husk, rice husk, sugarcane bagasse, and sawdust. These four materials are blending with fly ash with different ratios. For hydrogel preparation, Acrylamide (AAm) is used as the monomer, N, N'methylenebisacrylamide (MBA) as a crosslinker, and ammonium persulfate (APS) as an initiator. This hydrogelbiochar is then characterized by Brunauer -Emmet -Teller (BET) surface area analysis, Thermo Gravimetric Analysis (TGA), and swelling test analysis. Seven samples are analyzed for each raw material: fly ash hydrogel and corn husk hydrogel.

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Integrating EDDS-enhanced washing with low-cost stabilization of metal-contaminated soil from an e-waste recycling site

Cited by 65 publications

References 52 publications

Remediation of sandy soil contaminated by heavy metals with Na₂EDTA washing enhanced with organic reducing agents: element distribution and spectroscopic analysis

Remediation of sandy soil contaminated by heavy metals with Na₂EDTA washing enhanced with organic reducing agents: element distribution and spectroscopic analysis

Comprehensive assessment of harmful heavy metals in contaminated soil in order to score pollution level

Characterization of Hydrogel and Fly Ash from Biomass

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Integrating EDDS-enhanced washing with low-cost stabilization of metal-contaminated soil from an e-waste recycling site

Cited by 65 publications

References 52 publications

Remediation of sandy soil contaminated by heavy metals with Na2EDTA washing enhanced with organic reducing agents: element distribution and spectroscopic analysis

Remediation of sandy soil contaminated by heavy metals with Na2EDTA washing enhanced with organic reducing agents: element distribution and spectroscopic analysis

Comprehensive assessment of harmful heavy metals in contaminated soil in order to score pollution level

Characterization of Hydrogel and Fly Ash from Biomass

Contact Info

Product

Resources

About

Remediation of sandy soil contaminated by heavy metals with Na₂EDTA washing enhanced with organic reducing agents: element distribution and spectroscopic analysis

Remediation of sandy soil contaminated by heavy metals with Na₂EDTA washing enhanced with organic reducing agents: element distribution and spectroscopic analysis