Photodegradation of diphenylarsinic acid by UV-C light: Implication for its remediation

Wang, Anan; Teng, Ying; Hu, Xuefeng; Wu, Longhua; Huang, Yujuan; Luo, Yongming; Christie, Peter

doi:10.1016/j.jhazmat.2016.01.049

Cited by 12 publications

(3 citation statements)

References 50 publications

(70 reference statements)

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“…Consequently, ROS such as •OH and 1 O 2 were converted through Equations ( 4) and ( 6) [37,39] and further reacted with BPA. Wang et al [41] confirmed that 1 O 2 was generated under UV irradiation but that this reaction had little effect on the mineralization of organic species. Our study confirmed that the UV/PS process achieved a high BPA removal rate, albeit a lower TOC removal rate (Figure 1b), in agreement with Wang, Teng, Hu, Wu, Huang, Luo, and Christie [41].…”

Section: Mn(ivmentioning

confidence: 99%

UV Stimulated Manganese Dioxide for the Persulfate Catalytic Degradation of Bisphenol A

et al. 2021

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One of the most commonly produced industrial chemicals worldwide, bisphenol A (BPA), is used as a precursor in plastics, resins, paints, and many other materials. It has been proved that BPA can cause long-term adverse effects on ecosystems and human health due to its toxicity as an endocrine disruptor. In this study, we developed an integrated MnO2/UV/persulfate (PS) process for use in BPA photocatalytic degradation from water and examined the reaction mechanisms, degradation pathways, and toxicity reduction. Comparative tests using MnO2, PS, UV, UV/MnO2, MnO2/PS, and UV/PS processes were conducted under the same conditions to investigate the mechanism of BPA catalytic degradation by the proposed MnO2/UV/PS process. The best performance was observed in the MnO2/UV/PS process in which BPA was completely removed in 30 min with a reduction rate of over 90% for total organic carbon after 2 h. This process also showed a stable removal efficiency with a large variation of pH levels (3.6 to 10.0). Kinetic analysis suggested that 1O2 and SO4•− played more critical roles than •OH for BPA degradation. Infrared spectra showed that UV irradiation could stimulate the generation of –OH groups on the MnO2 photocatalyst surface, facilitating the PS catalytic degradation of BPA in this process. The degradation pathways were further proposed in five steps, and thirteen intermediates were identified by gas chromatography-mass spectrometry. The acute toxicity was analyzed during the treatment, showing a slight increase (by 3.3%) in the first 30 min and then a decrease by four-fold over 2 h. These findings help elucidate the mechanism and pathways of BPA degradation and provide an effective PS catalytic strategy.

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Section: Mn(ivmentioning

confidence: 99%

UV Stimulated Manganese Dioxide for the Persulfate Catalytic Degradation of Bisphenol A

et al. 2021

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“…Photochemical degradation plays an important role in transformation of arsenic compounds in aqueous systems and efficient decomposition of p-ASA via UV irradiation has been previously reported [13][14][15][16][17]. However, rapid degradation of p-ASA during UV irradiation treatment is accompanied with a weak decrease of total organic carbon (TOC) [13][14][15], an indicator of the severity of organic pollution [18], suggesting a negligible mineralization and the accumulation of aromatic by-products [13,19] with questionable toxicity. Improved photochemical treatments are therefore needed for the p-ASA containing agriculture effluents.…”

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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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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“…The advantages of PCD over conventional treatment techniques are degradation of a broad range of organic pollutants, lower cost, and mild operating conditions 2 . The TiO 2 catalyzed PCD of various groups of organic pollutants like alcohols, phenols, carbonyls and carboxylic compounds, aromatic, halocarbons etc.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Co:TiO2 Nanocomposites and their Application in Photodegradation of Acetic Acid

2017

Chem Sci Trans

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Nanocomposites of Co:TiO 2 were prepared by wet chemical methods. The prepared samples were characterized by XRD, SEM, BET, FTIR and UV-Visible spectra. The XRD analysis confirmed the presence of rutile and anatase both phases were present. It is found that rutile phase was more dominant. Applying the Scherrer's calculations through which particle size was found 35 and 80 nm in case of Co:TiO 2 and pure TiO 2 respectively. SEM image of Co:TiO 2 and TiO 2 were observed and both found in nanodiamension. The photocatalytic degradation of acetic acid was done at different condition of concentration, amount of photocatalyst and type of catalyst. The effective photodegradation of acetic acid were found at low concentration and photodegradation increases with decrease the concentration of acetic acid. The prominent degradation of acetic acid was found in the presence of nanocomposites Co:TiO 2 as compared with TiO 2 .

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Photodegradation of diphenylarsinic acid by UV-C light: Implication for its remediation

Cited by 12 publications

References 50 publications

UV Stimulated Manganese Dioxide for the Persulfate Catalytic Degradation of Bisphenol A

UV Stimulated Manganese Dioxide for the Persulfate Catalytic Degradation of Bisphenol A

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

Photocatalytic Activity of Co:TiO2 Nanocomposites and their Application in Photodegradation of Acetic Acid

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