Degradation of 2,4-dinitrotoluene by persulfate activated with zero-valent iron

Oh, Seok‐Young; Kang, Seung-Gu; Chiu, Pei C.

doi:10.1016/j.scitotenv.2010.04.032

Cited by 238 publications

(88 citation statements)

References 30 publications

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“…The percentage of PAH removal from contaminated sediment ranged between 41.1% and 42.6%. The results of this study were consistent with those of previous authors that a continuous supply of Fe 2+ could be provided to the persulfate system during the oxidation of ZVI by persulfate (Oh et al, 2010;Hussain et al, 2012). The activation of persulfate to generate sulfate radicals is more effective when Fe 2+ is supplied continuously when compared with its one-time dose.…”

Section: +supporting

confidence: 92%

Removal of polycyclic aromatic hydrocarbons from sediments using sodium persulfate activated by temperature and nanoscale zero-valent iron

Chen

Bình

Chen

et al. 2014

Journal of the Air & Waste Management Association

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, and temperature (50-70°C) were performed. The efficiency to remove PAHs was 10.7-39.1% for unactivated persulfate. The treated sample had over 50% of the persulfate still remaining from an initial persulfate dose of 170 g/L, whereas less than 1% of the persulfate remained from an initial persulfate dose of 0.017, 0.17, and 1.7 g/L. Adequate persulfate (170 g/L) must be present because it is the source of the sulfate radicals responsible for the degradation of PAHs. Results indicated that increasing temperature and the addition of nZVI into a persulfate-slurry system could enhance the persulfate oxidation process. The best removal efficiency (90%) was achieved after 24 hr while adding nZVI (0.01 g/L) to persulfate (170 g/L) at temperature of 70°C. The results suggested that nZVI assisted persulfate oxidation without elevating temperature may be a suitable and economic alternative for the ex situ treatment of PAH-contaminated sediments.Implications: Nano zero-valent iron (nZVI) has been successfully applied to transform/degrade contaminants in soils and water. Additionally, nZVI has been used as a catalyst to activate persulfate for the treatment of various contaminants. In this study, with the support of temperature, nZVI-persulfate oxidation system for treatment of PAH-contaminated sediments was improved significantly and the treated sediment could meet remediation goals.

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Section: +supporting

confidence: 92%

Removal of polycyclic aromatic hydrocarbons from sediments using sodium persulfate activated by temperature and nanoscale zero-valent iron

Chen

Bình

Chen

et al. 2014

Journal of the Air & Waste Management Association

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“…In 2008, Liang et al [13] firstly reported the use of ZVI as a source for Fe 2+ activated PS oxidation of trichloroethylene (TCE). The catalytic properties of ZVI for the degradation of 2,4-dinitrotoluene [14], spent caustic [15] and sulfamethoxazole [16] in the presence of PS were also tested. They concluded that ZVI can control the rate of SO 4 ÅÀ by smoothly and continuously releasing Fe 2+ to activate PS, thereby enhancing the reaction efficiency:…”

Section: åàmentioning

confidence: 99%

Degradation of chloramphenicol by persulfate activated by Fe 2+ and zerovalent iron

Nie

Yan

et al. 2015

Chemical Engineering Journal

198

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h i g h l i g h t sThe removal efficiencies for CAP in water by PS activated by Fe 2+ and ZVI were studied.CAP was effectively removed by the ZVI-PS system at a broad pH range of 3-10. CAP removal was significantly influenced by operational parameters.The ZVI-PS system shows potential prospects in wastewater or even concentrated wastewater treatment. An oxidation pathway was proposed for CAP removal by the ZVI-PS system. a r t i c l e i n f o , and HA significantly inhibited CAP decomposition. Up to 92.8%, 94.7%, and 75.7% of CAP were removed from the filtrate, permeate, and retentate phases of wastewater, respectively. This result indicated that the ZVI-PS system can significantly remove CAP from wastewater and even concentrated wastewater. The intermediate products during oxidation were identified, and the degradation pathways of CAP were tentatively proposed.

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“…In addition, Fe 0 was more effective than Fe 2? as activating agent and potentially more suitable for environmental applications (Oh et al 2010). …”

Section: Introductionmentioning

confidence: 99%