Removal of trichloroethylene (TCE) from groundwater by GAC and ZVI

Song, Tiehong; Gao, Yanjiao

doi:10.1080/19443994.2013.812522

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…Commonly used material was cheap iron, iron could effective adsorb and decrease a variety of heavy metals and organic matters. The use of Fe(0)-PRBs for treating polluted groundwater was close to two decades;however, more researches were still required to provide sufficient information of reactive mechanisms about combined pollution of heavy metals and organic matter and predict long-term performance of PRBs [8][9][10]. The purpose of this paper is to evaluate the efficiency of iron pillar towards Cr(Ⅵ) and TCE removal, evaluate the sorts of elements on the iron surface through Scanning Electron Microscopy (SEM) and Energy-Dispersive Spectrometry (EDS).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Removal of Trichloroethylene and Hexavalent Chromium in Groundwater by Iron Powder

Gao¹,

Liu²

2016

Proceedings of the 2016 5th International Conference on Energy and Environmental Protection (ICEEP 2016)

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In order to investigate simultaneously removing effect of iron powder(Fe(0)) on trichloroethylene (TCE) and hexavalent chromium (Cr(Ⅵ)) , Fe(0) was used to treat TCE and Cr(Ⅵ) of polluted groundwater at room temperature and Features on the surface of Fe(0) surface were checked by Scanning Electron Microscopy (SEM) and Energy-Dispersive Spectrometry. The experimental results showed that the iron powder could simultaneously remove the TCE and Cr(Ⅵ) in the groundwater, and achieved good removal rate. After 200 days, the largest removal rate of 94.8% was reached for TCE and 96.4% for Cr(VI). Through analysis of the images of SEM and EDS a conclusion was acquired that the iron powder surface contained the elements of carbon, oxygen, silicon, calcium, chromium and iron.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Removal of Trichloroethylene and Hexavalent Chromium in Groundwater by Iron Powder

Gao¹,

Liu²

2016

Proceedings of the 2016 5th International Conference on Energy and Environmental Protection (ICEEP 2016)

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“…Also, in drinking water treatment processes, few studies have been reported on the enhanced-ZVI process, such as the removal of trichloroethylene [23] and arsenic contamination [24], but only our previous study reported upon about how this enhanced process impacted NOM removal during drinking water production from surface waters [25].…”

Section: Introductionmentioning

confidence: 99%

Long-term performance of enhanced-zero valent iron for drinking water treatment: A lab-scale study

Liu

Gernjak

Keller

2017

Chemical Engineering Journal

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Abstract:Former studies have shown that enhanced-zero valent iron (ZVI) could effectively remove various contaminants. The present study evaluates for the first time the long-term performance of enhanced-ZVI to remove natural organic matter (NOM), an important water quality parameter in drinking water. Lab-scale flow-through experiments showed that averagely 7-14% dissolved organic carbon (DOC) and 6-15% ultraviolet absorbance at 254 nm (UV 254 ) reduction could be achieved by enhanced-ZVI in the first 10,000 bed volumes filtration when a 0.36 or 1.8 mins empty bed contact time (EBCT) was applied. After 10,000-bed volumes, the enhanced-ZVI bed became passivated. However, sulphuric acid was able to regenerate the passivated enhanced-ZVI bed, recover the capacity of enhanced-ZVI in removing NOM, and hence make the best use of the available ZVI. The acidic rinsing solution containing dissolved iron was suitable as a supplemental source of iron for coagulation. In addition, during the long-term experiments, the biofilters following enhanced-ZVI (1.8 min EBCT) removed more NOM than biofilters without any pre-treatment. This could be explained by the formation of biodegradable organic matter (BDOC) during the enhanced-ZVI process and the precipitation of iron in the biofilters. Based on these findings, a novel water treatment train, incorporating enhanced-ZVI with periodical regeneration, biofiltration, and coagulation, was proposed and evaluated.

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“…The industrial solvent trichloroethylene (TCE) is among the most widespread chlorinated compounds found in groundwater contamination [1]. High levels of TCE is considered a likely human carcinogen [2] .…”

Section: Introductionmentioning

confidence: 99%

Factors affecting TCE reduction by ZVI

Gao¹,

Li²,

Zhang³

et al. 2015

Proceedings of the 2015 International Conference on Economics, Social Science, Arts, Education and Management Engineering

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Abstract. Zero valent iron (Fe(0)) was used to reduce trichloroethylene (TCE).Some influence factors of TCE removal including Fe(0) purity, Fe(0) size, Fe(0) quality, solution pH, reaction temperature, oscillation rate and initial concentration of TCE were investigated in the batch experiments. The optimum experimental conditions were determined as: Fe(0) purity of 92%, Fe(0) size of 30 mesh, Fe(0) quality of 30mg/L, solution initial pH of 6.0 and reaction temperature of 25℃.Oscillation rate and initial concentration of TCE had little effects on TCE removal. The 5-day TCE removal rate was 90.4% under the optimum conditions.

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Removal of trichloroethylene (TCE) from groundwater by GAC and ZVI

Cited by 7 publications

References 12 publications

Simultaneous Removal of Trichloroethylene and Hexavalent Chromium in Groundwater by Iron Powder

Simultaneous Removal of Trichloroethylene and Hexavalent Chromium in Groundwater by Iron Powder

Long-term performance of enhanced-zero valent iron for drinking water treatment: A lab-scale study

Factors affecting TCE reduction by ZVI

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