Electroremediation of Contaminated Soils

Page, M.M.; Page, Christopher

doi:10.1061/(asce)0733-9372(2002)128:3(208)

Cited by 249 publications

(119 citation statements)

References 100 publications

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“…This is attributed to the electromigration. The dominance role of electromigration is removing copper which is in agreement with previous studies by Page and Page [18] and Probstein and Hicks [19]. Acar et al [20] had successfully removed cadmium without electroosmosis flow.…”

Section: Electrokinetic Remediationsupporting

confidence: 81%

Sorption, Desorption, Remediation and Fertility Characteristics of a Clay Soil

Hassan¹,

Mohamedelhassan²

2014

JCEA

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This study is conducted to investigate sorption and desorption characteristics of a clay soil of Medicine Hat, Alberta, Canada. Also, the soil fertility after the desorption tests was investigated. Sorption of copper by a clay soil was examined using copper solutions with concentrations from 1,000 mg/L to 5 mg/L. The influence of copper concentration and pH on desorption was also studied. Electrokinetic remediation was carried on soil specimen spiked with copper. Soil fertility parameters for specimens acidized by electrolysis reactions and nitric, hydrochloric, and citric acids were compared. From the results, the adsorption of copper by the soil is proportional to the concentration in the solution and Langmuir isotherm represents the data. Desorption of copper was found to increase with the increase of initial copper in the soil and the decrease of pH. At pH of 5.75 ± 0.25, the maximum desorption was 16.5% of initial copper and the minimum was 4.2%. In tests with similar copper concentrations, the maximum desorption was 76.6% in the test with pH of 2. Electrokinetics reduced the pH of soil near the anode to 2.1 and removed 86% of copper. Soil specimen acidized by electrolysis reactions preserved favourable fertility parameters compared with specimens acidized by acids.

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Section: Electrokinetic Remediationsupporting

confidence: 81%

Sorption, Desorption, Remediation and Fertility Characteristics of a Clay Soil

Hassan¹,

Mohamedelhassan²

2014

JCEA

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“…Most of the heavy metals are soluble at a pH less than 7 and precipitate at a pH higher than 7. Typically, the soil pH in EK remediation near the anode is in the range 2 -3.5 and near the cathode between 8 -11 [56]. For example, copper and cobalt are found in solutions in the pH range between 4 and 6 while they precipitate (for example, as insoluble hydroxides) at pH higher than 7.…”

Section: Ph Gradientmentioning

confidence: 99%

A Review Article: Electrokinetic Bioremediation Current Knowledge and New Prospects

Hassan¹,

Mohamedelhassan²,

Yanful³

et al. 2016

AiM

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This study discusses factors affecting various processes involved in bioremediation coupled with electrokinetics. The study presents innovative solutions, and proposes new directions. Environmental conditions that have an influence on the characteristics, behavior, and metabolism of indigenous microorganisms are presented. The discussion focuses on overcoming the unfavorable conditions created by electrolysis reactions, prolongation the survival of the microbes at contaminated sites, increase of microbial enzyme secretion, improvement of the indigenous bacteria metabolic pathways, and exploration of metagenomics resources from soil biota. The challenge facing the implementation of conventional bioremediation techniques in precisely and effectively delivering nutrients to indigenous bacteria, particularly in soils with tortuous paths and low hydraulic conductivity is discussed. Current knowledge in application of enhanced biostimulation using electrokinetics is reviewed. The implementation of bioaugmentation in bioremediation coupled with electrokinetics to enhance the outcome of bioremediation is presented. Effects of phenomena associated with electrokinetics in the hybrid remediation approach are discussed.

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“…They are eŠective for the removal of cationic heavy metals, because formed complexes are usually anionic and they are not adsorbed by soil minerals. However, they are disadvantageous in terms of cost of the chemicals, toxicity and increased mobility of the chelated metals, and di‹culty in waste water processing (Chen and Hong, 1995;Page and Page, 2002). For these reasons, the washing with simple acid or alkali is still worth further study.…”

Section: Introductionmentioning

confidence: 99%