Enhanced visible photocatalytic degradation of diclofen over N-doped TiO2 assisted with H2O2: A kinetic and pathway study

Nguyen, Thang Phan; Tran, Quoc Ba; Ly, Quang Viet; Hải, Lê Thanh; Le, Duc Trung; Tran, Minh Bao; Ho, Thi Thanh Tam; Nguyen, Xuan Cuong; Shokouhimehr, Mohammadreza; Vo, Dai‐Viet N.; Lam, Su Shiung; Do, Huu‐Tuan; Kim, Soo Young; Tung, Tra Van; Le, Quyet Van

doi:10.1016/j.arabjc.2020.05.023

Cited by 34 publications

(13 citation statements)

References 41 publications

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“…3.2 , demonstrating that, despite the increase in contact time, the irradiated volume would not be sufficient for pharmaceuticals removal. On the other hand, no large differences were observed in pharmaceuticals removal between 60 and 90 min, mainly due to compounds with high persistence, suggesting the need for longer reaction times, or the addition of agents capable of accelerating the reaction such as H 2 O 2 form complete mineralization [ 60 ]. Specifically, ERY and CBZ were the pharmaceuticals with the lowest degradation rates, showing maximum removal percentages of 45% and 61%, respectively, in combined SOLAR + UV-LED mode.…”

Section: Resultsmentioning

confidence: 99%

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Ponce-Robles

Mena²,

Diaz³

et al. 2022

Photochem Photobiol Sci

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Today, the emergence of increasingly restrictive treatment and reuse policies make the implementation of full-scale tertiary treatment, capable of improving the quality of water, a priority. Full-scale TiO2 photocatalysis systems are resulting in a promising option, since TiO2 is commercially available. However, questions such as how to work continuously during day/night irradiation cycle, or the removing of TiO2 in outlet flow are still unresolved. In this work, a full-scale system integrating a solar CPC/UV-LED step combined with commercial microfiltration membranes was installed in a conventional WWTP for agricultural reuse purposes. After optimization, 0.5 g/L of catalyst and combined SOLAR + UV-LED showing the highest pharmaceutical removal percentages, while a self-designed UV-LED included in the own reaction tank resulting in higher efficiencies compared with commercial lamps. Longer membrane surface area decreased fouling problems in the system. However, 60 min of irradiation time was necessary to reach the most restrictive water quality values according with (EU 2020/741). After optimization step, total costs were reduced by 45%. However, it was shown that a reduction in operating and maintenance costs, along with the development of more effective and economical commercial filtration membranes is a key factor; therefore, working on these aspects is essential in the treated water cost reduction. Graphical abstract

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Section: Resultsmentioning

confidence: 99%

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Ponce-Robles

Mena²,

Diaz³

et al. 2022

Photochem Photobiol Sci

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“…The gaseous product was examined employing a gas chromatograph (GC) along with a thermal conductivity detector (TCD). The stream velocity of carrier Helium gas was 30 millilitre/minute [10,11]. The oven's initial temperature was kept at 55 0 C for one minute before being increased to a temperature of 120 0 C at a percentage of 25 0 C /minute.…”

Section: Study Of Htg and Htl Outcomesmentioning

confidence: 99%

Studies on Influence of Process Parameters in Upgradation of Bio-oil Derived from HTL of Domestic household waste: Application of Response Surface Methodology

2022

Global NEST: The International Journal

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<p>This research focuses on hydrothermal gasification (HTG) and hydrothermal liquefaction (HTL) studies to produce bio-hydrogen from domestic mixed waste. HTG and HTL studies were studied at temperatures of 300–450°C and 300–400°C, correspondingly, with a catalyst level of 6 wt %. The sol-gel technique was used to make the Bentonite/Nb-TiO2 catalyst. For a solvent-waste proportion of 14 millilitre/gram, an C2H5OH - water proportions of 2:2, and a period of one-hour, maximum H2 output from HTL was 30 wt % (catalyst loads: 4 wt %) and HTG was 40 wt % (catalyst loads: 5 wt %). As C2H5OH acts as half-solvent and ideal solvent to bio-mass capacity it shot up H2 result in the HTG procedure by methanation, gas water shift and improving responses in the organization. The second output of the HTL procedure was bio-oil, which yielded 35 wt % with O/C as well as H/C standards of 1.2 and 1.0, respectively, and an HHV of 42 Mega Joule/kilogram. In the HTL system, mechanistic procedures such depolymerization, hydration, reduction, and hydrolysis generated in a larger proportion of gaseous product. Thermal and the solvent-to-waste proportion is the ideal factors in the H2 synthesis procedure, according to experimental analysis. Energy nexuses from domestic mixed trash are taken over in this research.</p>

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“…An important pharmaceutical pollutant, usually employed by people for their anti-inflammatory activity, is Diclofenac (DCF). Because it is hardly biodegradable [ 59 ], a more efficient method to remove it from wastewater must be used. Very recently, Nguyen et al [ 59 ] studied the photocatalytic activity of Visible/N-doped TiO 2 and Visible/N-doped TiO 2 /H 2 O 2 (with H 2 O 2 addition to the reaction environment).…”

Section: Hmps Obtained By Coupling Membrane Processes With Photocamentioning

confidence: 99%

“…Because it is hardly biodegradable [ 59 ], a more efficient method to remove it from wastewater must be used. Very recently, Nguyen et al [ 59 ] studied the photocatalytic activity of Visible/N-doped TiO 2 and Visible/N-doped TiO 2 /H 2 O 2 (with H 2 O 2 addition to the reaction environment). Photocatalytic experimental tests were carried out in a submerged photocatalytic membrane reactor (SMPR) with suspended photocatalyst.…”

Section: Hmps Obtained By Coupling Membrane Processes With Photocamentioning

confidence: 99%

Application of Hybrid Membrane Processes Coupling Separation and Biological or Chemical Reaction in Advanced Wastewater Treatment

2020

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The rapid urbanization and water shortage impose an urgent need in improving sustainable water management without compromising the socioeconomic development all around the world. In this context, reclaimed wastewater has been recognized as a sustainable water management strategy since it represents an alternative water resource for non-potable or (indirect) potable use. The conventional wastewater remediation approaches for the removal of different emerging contaminants (pharmaceuticals, dyes, metal ions, etc.) are unable to remove/destroy them completely. Hybrid membrane processes (HMPs) are a powerful solution for removing emerging pollutants from wastewater. On this aspect, the present paper focused on HMPs obtained by the synergic coupling of biological and/or chemical reaction driven processes with membrane processes, giving a critical overview and particular emphasis on some case studies reported in the pertinent literature. By using these processes, a satisfactory quality of treated water can be achieved, permitting its sustainable reuse in the hydrologic cycle while minimizing environmental and economic impact.

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Enhanced visible photocatalytic degradation of diclofen over N-doped TiO2 assisted with H2O2: A kinetic and pathway study

Cited by 34 publications

References 41 publications

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Integrated full-scale solar CPC/UV-LED–filtration system as a tertiary treatment in a conventional WWTP for agricultural reuse purposes

Studies on Influence of Process Parameters in Upgradation of Bio-oil Derived from HTL of Domestic household waste: Application of Response Surface Methodology

Application of Hybrid Membrane Processes Coupling Separation and Biological or Chemical Reaction in Advanced Wastewater Treatment

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