and Fuels Changzhi Li,† Xiaochen Zhao,† Aiqin Wang,† George W. Huber,†,‡ and Tao Zhang*,† †State Key Laborotary of Catalysis, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China ‡Department of Chemical and Biological Engineering, University of WisconsinMadison, Madison, Wisconsin 53706, United States

Catalytic Transformation of Lignin for the Production of Chemicals and Fuels

Cyclodextrins as pharmaceutical solubilizers.

Review of iron-free Fenton-like systems for activating H2O2 in advanced oxidation processes

Advanced oxidation processes (AOPs) constitute important, promising, efficient, and environmental-friendly methods developed to principally remove persistent organic pollutants (POPs) from waters and wastewaters. Generally, AOPs are based on the in situ generation of a powerful oxidizing agent, such as hydroxyl radicals (•OH), obtained at a sufficient concentration to effectively decontaminate waters. This critical review presents a precise and overall description of the recent literature (period 1990–2012) concerning the main types of AOPs, based on chemical, photochemical, sonochemical, and electrochemical reactions. The principles, performances, advantages, drawbacks, and applications of these AOPs to the degradation and destruction of POPs in aquatic media and to the treatment of waters and waste waters have been reported and compared.

Advanced Oxidation Processes in Water/Wastewater Treatment: Principles and Applications. A Review

Over the last decades, research efforts have been made at developing more effective technologies for the remediation of waters containing persistent organic pollutants. Among the various technologies, the so-called electrochemical advanced oxidation processes (EAOPs) have caused increasing interest. These technologies are based on the electrochemical generation of strong oxidants such as hydroxyl radicals ( OH). Here, we present an exhaustive review on the treatment of various synthetic and real wastewaters by five key EAOPs, i.e., anodic oxidation (AO), anodic oxidation with electrogenerated H 2 O 2 (AO-H 2 O 2 ), electro-Fenton (EF), photoelectro-Fenton (PEF) and solar photoelectro-Fenton (SPEF), alone and in combination with other methods like biological treatment, electrocoagulation, coagulation and membrane filtration processes. Fundamentals of each EAOP are also given.

Electrochemical advanced oxidation processes: A review on their application to synthetic and real wastewaters

The performance of the solar photoelectro-Fenton (SPEF) process with Fe2+ and Cu2+ as metal co-catalysts and its application to the treatment of solutions simulating Disperse Blue 3 (DB3) dye bath effluents of a Chilean textile company are reported in this paper. The trials were carried out with 2.5 l solutions using a solar pre-pilot plant containing an electrochemical reactor with a 20 cm2 BDD anode and air-diffusion cathode, coupled to a 600 ml solar photoreactor. DB3 solutions with 0.1 M Na2SO4 at pH 3.0 were electrolyzed to assess the effect of the applied current density, catalyst nature and concentration and dye content on the decolorization rate, dye removal and total organic carbon (TOC) abatement. The SPEF treatments using 0.5 mM Fe2+ + 0.1 mM Cu2+ led to the quickest degradation kinetics, mainly due to the concomitant action of UV photolysis and the generated oxidizing hydroxyl radicals on the organic molecules and/or their Cu(II) and Fe(III) complexes. Based on the identification of up to 15 aromatic by-products by GC–MS, a reaction scheme for DB3 degradation has been proposed. The progressive color and TOC removal of DB3 solutions were due to various changes undergone by the initial anthraquinonic structure, including the modification/addition of auxochromes giving 6 anthraquinonic by-products and its cleavage to yield compounds with 2 aromatic rings due to intermolecular cyclization or 1 aromatic ring mainly in the form of phthalic acid derivatives. Upon cleavage of these aromatics, maleic, oxalic, oxamic, pyruvic and acetic acids were formed. NO3− ions were released to a larger extent than NH4+ ions. The great efficacy of SPEF with Fe2+ and Cu2+ was demonstrated for simulated wastewater containing DB3 and industrial surfactants and additives at 50 mA cm−2, allowing their total decolorization and almost overall mineralization in only 150 and 360 min, with an energy consumption of 11.0 and 26.4 kWh m−3, respectively.

Finding the best Fe2+/Cu2+ combination for the solar photoelectro-Fenton treatment of simulated wastewater containing the industrial textile dye Disperse Blue 3

Ricardo Salazar

Papers

Finding the best Fe2+/Cu2+ combination for the solar photoelectro-Fenton treatment of simulated wastewater containing the industrial textile dye Disperse Blue 3

Electrochemical degradation of the antihypertensive losartan in aqueous medium by electro-oxidation with boron-doped diamond electrode.

Degradation of disperse azo dyes from waters by solar photoelectro-Fenton

Arsenic and fluoride removal by electrocoagulation process: A general review

Application of electro-Fenton/BDD process for treating tannery wastewaters with industrial dyes