Employing TiO 2 photocatalysis to deal with landfill leachate: Current status and development

Hassan, Muhammad; Zhao, Yaping; Xie, Bing

doi:10.1016/j.cej.2015.09.093

Cited by 163 publications

(73 citation statements)

References 109 publications

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“…However, most of these changes are achieved by doping or by making composite catalysts. Covering all these aspects, it is believed that further research is needed toward sunlight-irradiated TiO 2 photocatalysis based on the charge transfer mechanism in order to make this technology more cost-effective and commercialized [142].…”

Section: Photocatalysismentioning

confidence: 99%

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Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

et al. 2016

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Abstract:Municipal solid waste final disposal represents an environmental burden worldwide since landfilling, or open dumping, is still the preferred solution for the end of life of solid discarded materials. This study aims to review the technological innovations applied for landfill leachate treatment, taking into consideration the experiences obtained during the past years and the solutions which have been implemented. The review showed that both biological and physiochemical treatments are not able to achieve the requested water quality level, according to the limits established by regulations, whether applied in a single treatment or multiple treatments. In order to respect sustainable release limits to guarantee environmental protection, the construction of depuration systems and combining biological and physiochemical treatment methods is considered of the utmost importance. The review looks at possible joint applications of different treatment techniques reviewed by other studies and considers the state of the art of current research. Combined technical solutions suggested within the 2016 peer-reviewed papers are presented and discussed as a sustainable way to effectively treat landfill leachate, giving particular attention to feasible solutions for developing countries.

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Section: Photocatalysismentioning

confidence: 99%

“…Despite the relatively good efficiency of TiO 2 photocatalysis to deal with landfill leachate, several technical challenges need to be addressed, such as [142]:…”

Section: Photocatalysismentioning

confidence: 99%

Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

et al. 2016

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“…(4) and (5)), allowing the oxidation of organic molecules and ionized species [5,6]. The main factors that influence the photocatalytic degradation are pH, initial concentration of dyes, reaction temperature, catalyst concentration, oxidizing agents, light intensity, and irradiation time [6,17,20]. Acid pH is more favorable for photocatalytic applications than neutral or alkaline pH [30].…”

Section: Introductionmentioning

confidence: 99%

“…It presents three polymorphic phases: anatase and rutile, with tetragonal structure; and brookite, orthorhombic [33,34], being anatase the phase of greater degradative efficiency [17]. Due to the TiO 2 bandgap energy being relatively wide (E g = 3.2 eV for anatase; E g = 3.0 eV for rutile; E g = 3.1 eV for brookite) [6,33,34], the material can only be activated by UV irradiation with λ < 380 nm [35].…”

Section: Introductionmentioning

confidence: 99%

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Titanium Dioxide Films for Photocatalytic Degradation of Methyl Orange Dye

Bento¹,

Pillis²

2018

Titanium Dioxide - Material for a Sustainable Environment

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The aim of this work was to characterize and evaluate the influence of the thickness on the photocatalytic efficiency of titanium dioxide thin films on the degradation of methyl orange dye under UV light irradiation. The films of 280 and 468 nm thick were deposited on borosilicate substrates at 400°C by the MOCVD technique using titanium isoproxide IV as precursor. XRD analyses showed the formation of anatase-TiO 2 phase. Crosssectional FE-SEM images show that the films presented a dense columnar structure and grown perpendicularly to the substrate surface. The photocatalytic activity of the catalysts was studied using UV-vis spectrophotometry The TiO 2 film with 468 nm of thickness presented higher photocatalytic activity exhibiting 69% of dye degradation. The increase of grain size and thickness of the films promoted an improvement of photocatalytic efficiency.

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Preparation and characterization of magnetic hollow Fe₃O₄/P(GMA‐EGDMA)‐SO₃H/Au‐PPy recyclable catalyst for catalytic reduction of 4‐nitrophenol

Yang

Feng

et al. 2018

Applied Organom Chemis

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A highly effective and stable hollow Fe3O4/P(GMA‐EGDMA)‐SO3H/Au‐PPy catalyst was prepared. Monodisperse hollow Fe3O4 microspheres were synthesized using a hydrothermal method. As the catalyst support, magnetic hollow Fe3O4/P(GMA‐EGDMA) microspheres with core–shell structure were prepared by distillation precipitation polymerization. Then sulfonic acid groups (─SO3H) were introduced into the surface of the support by surface modification. Au3+ could be adsorbed by coordination with ─SO3H and underwent redox reactions with added pyrrole monomers. Finally, an Au–polypyrrole (PPy) layer was formed on the surface of the Fe3O4/P(GMA‐EGDMA)‐SO3H microspheres. The synthesized material was characterized using various techniques. Results indicated that the as‐prepared hollow Fe3O4/P(GMA‐EGDMA)‐SO3H/Au‐PPy catalyst had excellent catalytic activity and exhibited reusability for the reduction reaction of 4‐nitrophenol. In addition, the catalyst was reusable for at least ten successive cycles.

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Employing TiO 2 photocatalysis to deal with landfill leachate: Current status and development

Cited by 163 publications

References 109 publications

Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

Titanium Dioxide Films for Photocatalytic Degradation of Methyl Orange Dye

Preparation and characterization of magnetic hollow Fe₃O₄/P(GMA‐EGDMA)‐SO₃H/Au‐PPy recyclable catalyst for catalytic reduction of 4‐nitrophenol

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Employing TiO 2 photocatalysis to deal with landfill leachate: Current status and development

Cited by 163 publications

References 109 publications

Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

Novel and Conventional Technologies for Landfill Leachates Treatment: A Review

Titanium Dioxide Films for Photocatalytic Degradation of Methyl Orange Dye

Preparation and characterization of magnetic hollow Fe3O4/P(GMA‐EGDMA)‐SO3H/Au‐PPy recyclable catalyst for catalytic reduction of 4‐nitrophenol

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Product

Resources

About

Preparation and characterization of magnetic hollow Fe₃O₄/P(GMA‐EGDMA)‐SO₃H/Au‐PPy recyclable catalyst for catalytic reduction of 4‐nitrophenol