Mineralization of aniline in aqueous solution by electrochemical activation of persulfate

Chen, Wen-Shing; Huang, Chi-Pin

doi:10.1016/j.chemosphere.2014.12.053

Cited by 165 publications

(51 citation statements)

References 43 publications

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“…Photoproduct analysis identified the generation of several aromatic compounds: hydroxybenzaldehyde, nitrobenzene, benzenediol sulfate, o-ASA (photo-Fries rearrangement product) [15], and biphenylarsinic acid with [M + H] + m/z at 122.9, 123.7, 190.7, 217.7, and 278.9 respectively (Table 1). Previous works [15] reported the cleavage of As-C bond during photolysis, generating aniline at circumneutral conditions, which could be sequentially oxidized to nitrobenzene [21,32,33]. The generation of benzenediol sulfate could result from sulfonation of dihydrobenzene formed both by direct p-ASA photolysis [13,14] or its oxidation of by SO 4 • − .…”

Section: Resultsmentioning

confidence: 99%

“…Advanced oxidation processes (AOPs) have been successfully applied in the treatment of wastewater, owing to its capability of mineralization and detoxification of many organic pollutants [20][21][22][23]. Recently, sulfate radical (SO 4 • − ) based AOPs have gained much more attention [20,24], among which activated-persulfate (PS) based system is of popularity due to its stability in aqueous solution [21]. PS is generally activated via UV, heat, base, transition metals, ultrasound and some synthetic catalysts [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Photooxidation of p-Arsanilic Acid in Aqueous Solution by UV/Persulfate Process

Shen

Pozdnyakov

et al. 2018

Applied Sciences

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Used as a kind of feed additive, p-arsanilic acid can pose a potential risk to organisms when abandoned in the environment. The photodegradation of p-ASA was investigated under UV-C irradiation in the presence of persulfate (PS) in this work. The addition of PS facilitated the decomposition of p-ASA and notably, the presence of 50 mmol PS brought about a nearly complete mineralization after 3 h, while an insignificant total organic carbon (TOC) removal was observed under UV irradiation (λ = 254 nm) only. Experimental results proved that sulfate radical (SO 4 • −) was responsible for the promotion effect. The cleavage of As-C bond released inorganic arsenic and caused the occurrence of various organic products, for example, hydroxybenzaldehyde, nitrobenzene, benzenediol sulfate, and biphenylarsinic acid. The application of PS with UV-C light may throw a light on thorough treatment for p-ASA containing wastewater.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photooxidation of p-Arsanilic Acid in Aqueous Solution by UV/Persulfate Process

Shen

Pozdnyakov

et al. 2018

Applied Sciences

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“…Various oxidants (O 2 , H 2 O 2 , and O 3 ) were used in catalysed or non-catalysed media and various amounts of TOC and COD removal were observed in these studies [7,8]. Furthermore, many methods such as oxidation [9], extraction [10], biodegradation [11], and adsorption [12] were performed to degrade aniline or decontaminate aniline-polluted water. However, most of the methods fail to provide the desired yield or they are not satisfactory in the major issues, such as treatment time, operating cost, or environmental awareness.…”

Section: Introductionmentioning

confidence: 99%

Multi-response central composite design of the mineralization and removal of aniline by subcritical water oxidation method

2019

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Aniline is used by many industrial organizations and is released into the environment in high amounts and pollutes the water. Due to the damages to human health, there is a need for effective and environmentally friendly methods to remove this compound from the water. The aim of this work is to mineralize and remove aniline by investigating total organic carbon removal and aniline removal, respectively, via using the eco-friendly method, subcritical water oxidation and green oxidizing agent, H 2 O 2 . The effect of process variables such as temperature, treatment time and H 2 O 2 concentration were evaluated. Total organic carbon removal of aniline was obtained as 92.73% in 80 min of treatment time and in the presence of 60 mM of H 2 O 2 at 403 K. 99.21% of aniline removal was achieved based on the UV spectrophotometric analysis at these conditions. The response surface method was used to optimize the performed model and the effect of the above-mentioned parameters. The reliability of the method was provided by ANOVA.

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“…Therefore, eco-friendly electrolytes have been become the key to solve the problem. Persulfate (PS, S2O8 2− ), a strong oxidant, could be activated to produce stronger sulfate radical (SO4 •− ) by electron transfer, heat, ultrasound and other methods [18][19][20][21] (Eq. 1).…”

Section: Introductionmentioning

confidence: 99%

Preparation of a sunlight-driven TiO₂ film with excellent material characterizations and photoelectrocatalytic properties by an eco-friendly manner

Li¹,

Liu²,

Zhang³

et al. 2019

Preprint

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A hybrid structure of (NOx)i/S6+-TiO2 (x=0,1) film with high visible-light activity was prepared via facile one-step anodizing in (NH4)2S2O8 electrolyte. The film was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and ultraviolet-visible-infrared absorption spectroscopy, respectively. Transient photocurrent response and linear sweep voltammetry were also detected. The results showed that the (NOx)i/S6+-TiO2 film was composed of “flower-like” and porous structure. And N and S were successfully doped in the film. Meanwhile, the film also displayed broad and strong optical absorption at around 544 nm and 1500 nm. The photocurrent density reached 0.71 mA/cm2. The decoloration rate was close to 100% and TOC removal reached 59.44% in 20 min under sunlight in photoelectrocatalytic (PEC) degradation methyl orange. The film also exhibited good stability after reuse ten times. A possible mechanism of PEC was suggested in methyl orange degradation by using (NOx)i/S6+-TiO2 film.

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Mineralization of aniline in aqueous solution by electrochemical activation of persulfate

Cited by 165 publications

References 43 publications

Photooxidation of p-Arsanilic Acid in Aqueous Solution by UV/Persulfate Process

Photooxidation of p-Arsanilic Acid in Aqueous Solution by UV/Persulfate Process

Multi-response central composite design of the mineralization and removal of aniline by subcritical water oxidation method

Preparation of a sunlight-driven TiO₂ film with excellent material characterizations and photoelectrocatalytic properties by an eco-friendly manner

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Mineralization of aniline in aqueous solution by electrochemical activation of persulfate

Cited by 165 publications

References 43 publications

Photooxidation of p-Arsanilic Acid in Aqueous Solution by UV/Persulfate Process

Photooxidation of p-Arsanilic Acid in Aqueous Solution by UV/Persulfate Process

Multi-response central composite design of the mineralization and removal of aniline by subcritical water oxidation method

Preparation of a sunlight-driven TiO2 film with excellent material characterizations and photoelectrocatalytic properties by an eco-friendly manner

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Preparation of a sunlight-driven TiO₂ film with excellent material characterizations and photoelectrocatalytic properties by an eco-friendly manner