Removal of residual contaminants in petroleum-contaminated soil by Fenton-like oxidation

Lu, Mang; Zhang, Zhongzhi; Qiao, Wei; Guan, Yueming; Meng, Xianghai; Peng, Chong

doi:10.1016/j.jhazmat.2010.03.046

Cited by 84 publications

(34 citation statements)

References 21 publications

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“…The concentrations of catalyst and oxidant were demonstrated to be crucial for the conventional Fenton system [34–36]. For the purpose of investigating the influence of Fe and SPC concentration on PCE degradation, additional batch experiments were conducted in the presence of 0.5, 1.0 and 5.0 mM of Fe(III) and SPC for the Fe(III)/SPC system (Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhancement effects of reducing agents on the degradation of tetrachloroethene in the Fe(II)/Fe(III) catalyzed percarbonate system

Miao

et al. 2015

Journal of Hazardous Materials

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In this study, the effects of reducing agents on the degradation of tetrachloroethene (PCE) were investigated in the Fe(II)/Fe(III) catalyzed sodium percarbonate (SPC) system. The addition of reducing agents, including hydroxylamine hydrochloride, sodium sulfite, ascorbic acid and sodium ascorbate, accelerated the Fe(III)/Fe(II) redox cycle, leading to a relatively steady Fe(II) concentration and higher production of free radicals. This, in turn, resulted in enhanced PCE oxidation by SPC, with almost complete PCE removal obtained for appropriate Fe and SPC concentrations. The chemical probe tests, using nitrobenzene and carbon tetrachloride, demonstrated that HO• was the predominant radical in the system and that O2•− played a minor role, which was further confirmed by the results of electron spin resonance measurements. PCE degradation decreased significantly with the addition of isopropanol, a HO• scavenger, supporting the hypothesis that HO• was primarily responsible for PCE degradation. It is noteworthy that Cl− release was slightly delayed in the first 20 mins, indicating that intermediate products were produced. However, these intermediates were further degraded, resulting in the complete conversion of PCE to CO2. In conclusion, the use of reducing agents to enhance Fe(II)/Fe(III) catalyzed SPC oxidation appears to be a promising approach for the rapid degradation of organic contaminants in groundwater.

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Section: Resultsmentioning

confidence: 99%

Enhancement effects of reducing agents on the degradation of tetrachloroethene in the Fe(II)/Fe(III) catalyzed percarbonate system

Miao

et al. 2015

Journal of Hazardous Materials

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“…The main reason is partial oxidation of refractory organics and conversion of some slowly degradable organic matter to readily biodegradable organics. One of the AOP functions is rapid partial degradation and a long period of mineralization [Lu et al, 2010]. The H 2 O 2 /Fe 2+ mass ratio of 20 was determined as the optimum ratio in this study.…”

Section: Aop Optimizationmentioning

confidence: 99%

Sequencing treatment of landfill leachate using ammonia stripping, Fenton oxidation and biological treatment

Nurisepehr

Jorfi

Kalantary³

et al. 2012

Waste Manag Res

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Landfill leachates contain a wide variety of pollutants such as organic matter, refractory compounds, ammonia, particulate and dissolved solids and hazardous metals requiring application of advanced and well designed treatment processes before release to the environment. The main purpose of this research was to evaluate the efficiency of combined air stripping, Fenton oxidation and biological treatment in treating landfill leachate, especially the elimination of ammonia and refractory organics. The laboratory scale set-up consisted of three sequential but separate steps. The optimum conditions for air stripping and the Fenton oxidation were determined for landfill leachate from Karaj city, Iran. The final step was a moving bed bioreactor with HRTs of 18, 12 and 6 h. The highest NH(3)-N removal was 79% in the air stripping process at pH 10.5. At the optimum conditions for the Fenton reaction at a reaction time of 90 min, pH 3 and a H(2)O(2)/Fe(2+) mass ratio of 20, the COD removal was 61% and improved the BOD/COD ratio from 0.42 to 0.78. The overall COD removal including the final biological reactor with a HRT of 6 h resulted in an effluent COD concentration of less than 100 mg L(-1).

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“…Therefore, the pH must be adjusted both before and after treatment of any contaminated site (Watts and Teel, 2005). To overcome these limitations, organic and inorganic chelating agents are often used, allowing Fenton's process to occur at a neutral pH (Lu et al, 2010;Pardo et al, 2014;Venny et al, 2012). Chelating agents prevent the precipitation of iron catalysts into iron oxyhydroxides (Fe(OH) 3 ).…”

Section: Chemical Remediationmentioning

confidence: 99%

Remediation technologies for oil-contaminated sediments

Agarwal

Liu

2015

Marine Pollution Bulletin

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Removal of residual contaminants in petroleum-contaminated soil by Fenton-like oxidation

Cited by 84 publications

References 21 publications

Enhancement effects of reducing agents on the degradation of tetrachloroethene in the Fe(II)/Fe(III) catalyzed percarbonate system

Enhancement effects of reducing agents on the degradation of tetrachloroethene in the Fe(II)/Fe(III) catalyzed percarbonate system

Sequencing treatment of landfill leachate using ammonia stripping, Fenton oxidation and biological treatment

Remediation technologies for oil-contaminated sediments

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