Improvement in electrokinetic remediation of Pb-contaminated soil near lead acid battery factory

Cai, Zongping; Doren, Jeremiah Van; Fang, Zhanqiang; Li, Weishan

doi:10.1016/s1003-6326(15)63937-1

Cited by 29 publications

(8 citation statements)

References 25 publications

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“…Voltage changes, however, have the maximum effect on the soil geochemical characteristics that critically affect the electro-osmotic flow. Moreover, the voltage of 1 V cm -1 promotes the development and maintenance of the electro-osmotic flow during the reaction 39,40 . Effect of voltage in the range of 3.0 to 1.5 V cm -1 on the efficiency of the EK remediation process in removing pyrene from soil was examined.…”

Section: Ek Remediationmentioning

confidence: 99%

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

Abtahi

Jorfi

Mehrabi

et al. 2018

Chem.Biochem.Eng.Q.

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Effect of surfactant addition on persulfate-assisted electrokinetic remediation of pyrene-spiked soil was studied. The influence of effective factors including voltage, surfactant addition, moisture content, and persulfate concentration on the removal of initial pyrene concentration of 200 mg kg-1 were investigated. A complete pyrene removal was observed for voltage of 1 V cm-1 , saturated conditions, Tween 80 concentration of 20 mL kg-1 , and persulfate concentration of 100 mg kg-1 after 24 h, corresponding to pyrene mineralization of 61 %, based on TPH analysis. The experimental results were best fitted with pseudo-first-order kinetic model with correlation coefficient of 0.968 and rate constant of 0.191 min −1. The main intermediates of pyrene degradation were benzene o-toluic acid, acetic, azulene, naphthalene and decanoic acid. Finally, an unwashed hydrocarbon-contaminated soil was subjected to persulfate-assisted electrokinetic remediation, and a TPH removal of 38 % was observed for the initial TPH content of 912 mg kg-1 , under the selected conditions.

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Section: Ek Remediationmentioning

confidence: 99%

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

Abtahi

Jorfi

Mehrabi

et al. 2018

Chem.Biochem.Eng.Q.

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“…The main transport mechanisms of contaminants are electromigration, electroosmosis, and electrophoresis [ 40 ]. Electrolysis of water molecules is an important reaction at an electrode that produces hydrogen (H + ) (H 2 O → 2H + + 1/2 O 2 (gas) + 2e − ) and hydroxide ions (OH − ) (2H 2 O + 2e − → 2OH − + H 2 (gas)), which not only polarizes the electrodes, but also changes the pH of sediment with possible repercussions on its chemistry [ 41 ]. On the other hand, the precipitation of heavy metals caused by OH − greatly limits the removal efficiency of heavy metals, despite electrolytes containing suitable complexants, chelators, surfactants, and other agents that help to overcome this problem [ 38 , 42 ].…”

Section: Ex Situ Remediation Technologymentioning

confidence: 99%

Recent Progress on Ex Situ Remediation Technology and Resource Utilization for Heavy Metal Contaminated Sediment

2023

Toxics

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Sediment is an important part of aquatic systems, which plays a vital role in transporting and storing metals. Due to its abundance, persistence, and environmental toxicity, heavy metal pollution has always been one of the hot spots in the world. In this article, the state-of-art ex situ remediation technology for metal-contaminated sediments is elaborated, including sediment washing, electrokinetic remediation (EKR), chemical extraction, biological treatment, as well as encapsulating pollutants by adding some stabilized/solidified materials. Furthermore, the progress of sustainable resource utilization methods, such as ecosystem restoration, construction materials (e.g., materials fill materials, partition blocks, and paving blocks), and agriculture use are reviewed in detail. Finally, the pros and cons of each technique are summarized. This information will provide the scientific basis for selecting the appropriate remediation technology in a particular scenario.

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“…Compared to ex-situ remediation technologies, in-situ decontamination does not require excavation and transport of contaminated sediment and soil to off-site treatment or disposal facilities, thus it is generally a more practical and economical approach [ 14 ]. Conventional in-situ soil remediation technologies used for industrial sites contaminated with heavy metals include soil washing/flushing [ 15 , 16 ], chemical immobilization [ 17 , 18 ], electro kinetic extraction [ 19 , 20 ], and phytoremediation [ 21 ]. While these technologies may be appropriate for small scale (<1 ha) remediation, they quickly become cost-prohibitive at larger scales.…”

Section: Introductionmentioning

confidence: 99%

Remediation of heavy metal contamination of sediments and soils using ligand-coated dense nanoparticles

Huang

Keller

2020

PLoS ONE

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Sediment and soil contamination with toxic heavy metals, including cadmium (Cd 2+) and lead (Pb 2+), represents a major long-term remediation challenge. Resuspension of contaminated sediments into the water column, or the uptake of toxic metals from top soil, can lead to exposure of aquatic or terrestrial organisms, followed by bioconcentration, bioaccumulation and biomagnification, which may pose a threat to public health. We have developed a novel nanoscale engineered material, namely ligand-coated dense nanoparticles (Ligand DNPs), which contain a dense WO 3 nanoparticle core and a shell functionalized with a metal-binding organic ligand (EDTA), to effectively sequester heavy metal ions deeper into the soil and sediments. We demonstrate that one application of Ligand DNPs can remove from 60% to almost 80% of the Cd and Pb in two different soil matrices, driving these metal ions deeper into the sediment or soil column via gravity, and making them less bioavailable. Ligand DNPs can provide a relatively fast, convenient, and efficient in-situ approach for the remediation of sediments and soils contaminated with heavy metals.

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Improvement in electrokinetic remediation of Pb-contaminated soil near lead acid battery factory

Cited by 29 publications

References 25 publications

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

Recent Progress on Ex Situ Remediation Technology and Resource Utilization for Heavy Metal Contaminated Sediment

Remediation of heavy metal contamination of sediments and soils using ligand-coated dense nanoparticles

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