Simultaneous removal of multiple heavy metals from soil by washing with citric acid and ferric chloride

Shi, Jiyan; Pang, Jingli; Liu, Qinglin; Luo, Yang; Ye, Jien; Xu, Qiao; Long, Bibo; Ye, Binhui; Yuan, Xiying

doi:10.1039/c9ra09999a

Cited by 27 publications

(6 citation statements)

References 62 publications

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“…The effiencies were in the sequence of FeCl3 > EDTA > HCl which is similar to data reported in literature [42,43]. The removal efficiencies were observed slightly lower than the reported data [43,44]. This may be due to the presence of more clay fraction in the soil studied.…”

Section: Column Leaching Tests and Analytical Methodssupporting

confidence: 89%

Design of Soil Remediation Techniques from Column Leaching Test Results

L¹,

Sumalatha

Sunagar

et al. 2022

IJE

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T he soil remediation at a contaminated site requires knowledge of contaminant transport parameters and processes. T his paper presents the determination of transport parameters from column leaching tests in context with two soil remediation techniques i.e., soil washing and immobilization. To evaluate the soil washing technique, t he column leaching tests on the polluted soil were conducted with diluted acid solutions of hydrochloric acid, ethylene diamine tetraacetic acid and ferric chloride to evaluate the leaching efficiencies of the selected leaching solutions. It was observed that the efficiency of diluted ferric chloride solution was higher as it removed the higher percentage of metals from the soil. From these test results, the contaminant transport parameters i.e., retardation factor and dispersion coefficient were determined which are useful to calculate the volume of leaching solut ion that will be required for soil washing at a site. As part of immobilization study on this soil, the soil was mixed with the selected amendments (lime, sodium hydroxide and cement) to increase the pH of the soil to 10 and the retardation factors were estimated through batch leaching test results. The retardation factors of different metals obtained with lime addition were found higher than the other amendments.To analyze the long-term stability of the amended mixtures, the leaching tests were conducted on amended soil samples and the immobilization efficiencies were estimated. It was found that the immobilization efficiencies were higher with lime addition and also concluded that the immobilization effiencies are directly related to retardation factors.

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Section: Column Leaching Tests and Analytical Methodssupporting

confidence: 89%

Design of Soil Remediation Techniques from Column Leaching Test Results

L¹,

Sumalatha

Sunagar

et al. 2022

IJE

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“…In contrast, organic acids, with a lesser environmental impact, have also shown excellent performance with respect to the removal of heavy metals from soils or ash. Specifically, Hong et al reported that more than 70% of Pb and Cd can be removed using 0.1 M ethylenediaminetetraacetic acid (EDTA) solution and citric acid (CA), while Shi et al reported soil Cd and Pb removal rates of 73.1 and 98.0%, respectively 37 , 38 . It has also been reported that oxalic acid (OA) is effective in the removal of As, showing a removal efficiency of more than 50% for As 39 .…”

Section: Introductionmentioning

confidence: 99%

“…In most studies in which different agents have been used to realize heavy metal removal, the focus has always been on the application of single-agent solutions. However, the various agents studied to date show different removal efficiencies for different heavy metals 35 – 38 , 45 . This implies that effectively realizing the removal of multiple heavy metals using a single-agent solution remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

Heavy metal removal using an advanced removal method to obtain recyclable paper incineration ash

Kim

Choi

Park

et al. 2022

Sci Rep

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Various agents, including ethylenediaminetetraacetic acid, oxalic acid, citric acid, and HCl, were applied to remove heavy metals from raw paper incineration ash and render the ash recyclable. Among these prepared agent solutions, ethylenediaminetetraacetic acid showed the highest efficiency for Pb removal, while oxalic acid showed the highest efficiencies for Cu, Cd, and As removal. Additionally, three modes of an advanced removal method, which involved the use of both ethylenediaminetetraacetic acid and oxalic acid, were considered for use at the end of the rendering process. Among these three modes of the advanced removal method, that which involved the simultaneous use of ethylenediaminetetraacetic acid and oxalic acid, i.e., a mixture of both solutions, showed the best heavy metal removal efficiencies. In detail, 11.9% of Cd, 10% of Hg, 28.42% of As, 31.29% of Cu, and 49.19% of Pb were removed when this method was used. Furthermore, the application of these three modes of the advanced removal method resulted in a decrease in the amounts of heavy metals eluted and brought about an increase in the CaO content of the treated incineration ash, while decreasing its Cl content. These combined results enhanced the solidification effect of the treated incineration ash. Thus, it was confirmed that the advanced removal method is a promising strategy by which recyclable paper incineration ash can be obtained.

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“…Increasing industrial Cd discharges originating primarily from metal mining, refining, smelting, metal plating, electrolysis, electroplating, and other industries have deteriorated the aqueous environment [3]. Due to its non-biodegradable nature, Cd can accumulate in the environment and food chain; thus, it has adverse effects on ecosystems and human safety [4]. Therefore, Cd contamination has drawn an increasing amount of concern around the world.…”

Section: Introductionmentioning

confidence: 99%

Functionalized moso bamboo powder adsorbent for Cd(II) complexes with citric acid/tartrate acid: characterization, adsorptive performance, and mechanism

Sun

Lin²,

Li³

et al. 2021

Environmental Engineering Research

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A new amine group functionalized moso bamboo powder adsorbent (AMBP) was prepared using a facile procedure to remove Cd(II) complexes with citric acid (CA) and tartrate acid (TA). The properties of the AMBP were characterized using SEM, FTIR, XPS, BET, and an elemental analysis. The adsorptive performances of the AMBP toward Cd(II)-CA/TA were investigated. The results indicated that amine group was successfully introduced, and the AMBP with a BET specific surface area of 0.463 m2/g was effective in adsorbing Cd(II)-CA/TA under pH 4.0–10.0. The removal of Cd(II) increased significantly when the Cd(II)/ligand molar ratio changed from 1:0.5 to 1:2. The adsorption processes of Cd(II)-CA/TA were endothermic and fit well with the pseudo-second-order kinetic model (R2 > 0.999). The Langmuir model (qmax of 14.41 and 7.58 mg/g for Cd(II)-CA and Cd(II)-TA, respectively) fit the isotherms better than the Freundlich model. The AMBP could be regenerated by HCl and reused at least 4 times. The uptake mechanisms of Cd(II)-CA/TA were proposed to be physisorption and the chemisorption of the coordination between –NH2/–NH and the Cd(II). This work shows that the AMBP is an adsorbent with high practical value to remove Cd(II) in water or wastewater containing CA/TA.

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Simultaneous removal of multiple heavy metals from soil by washing with citric acid and ferric chloride

Abstract: Citric acid and ferric chloride exhibited synergistic effect on the removal of multiple heavy metals from soil.

Cited by 27 publications

References 62 publications

Design of Soil Remediation Techniques from Column Leaching Test Results

Design of Soil Remediation Techniques from Column Leaching Test Results

Heavy metal removal using an advanced removal method to obtain recyclable paper incineration ash

Functionalized moso bamboo powder adsorbent for Cd(II) complexes with citric acid/tartrate acid: characterization, adsorptive performance, and mechanism

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