Alumina-Supported Noble Metal Catalysts for Destructive Oxidation of Organic Pollutants in Effluent from a Softwood Kraft Pulp Mill

Chuang, Karl T.

doi:10.1021/ie980111v

Cited by 49 publications

(40 citation statements)

References 30 publications

(62 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2. It can be seen that the amorphous component of CuO-Co 2 O 3 -PO 4 3− modified kaolin was rather high, and the crystalline structure of each sample was little changed after electrolysis compared with that before electrolysis, the only difference being in the intensity of each diffractogram, indicating that the catalyst's structure was almost unchanged during the electrolysis process.…”

Section: Results and Discussion Characteristics Of Catalystmentioning

confidence: 98%

“…In the presence of catalyst (CuO-Co 2 O 3 -PO 4 3− modified kaolin), organic pollutants can be degraded both by electrolysis and adsorption-catalysis. To evaluate the feasibility of adding catalyst into the electro-catalysis process, the efficiencies of COD removal by only modified kaolin, electro-catalysis, and their combined process were compared in the same reactor.…”

Section: Synergic Effect On Cod Removalmentioning

confidence: 99%

“…After electrolysis, absorptions at 2957 cm −1 and 2856 cm −1 assigned to =CH 3 and =CH 2 almost disappeared, indicating that the active hydroxyl radicals which were produced destroyed this bond and the surfactant was partially degraded to H 2 O and CO 2 . In addition, the peak at about 1191 cm −1 , assigned to the =SO 3 group also weakened after the treatment, indicating the benzene-sulfonate group was oxidized to SO 4 2− .…”

Section: Uv-visible Spectrophotometric Investigationsmentioning

confidence: 99%

“…The organic pollutants in the waste streams from papermaking mills include organic sulfur compounds, pulping chemicals, organic acids, phenolic compounds, unsaturated fatty acids, terpenes, 4 etc. Oxidation of such a multi-component mixture is much more complicated than the oxidation of individual organic compounds.…”

Section: Introductionmentioning

confidence: 99%

“…However, the addition of heavy metals may give rise to secondary pollution and limit its applications. 14 In the current work, the multi-functional CuO-Co 2 O 3 -PO 4 3− modified kaolin was applied to treat anionic surfactants, along with a laboratory-scale electro-chemical cell (200 cm 3 volume). Anionic surfactant (DBS) and real paper-making wastewater were used to evaluate the multi-function of the combined electro-catalytic process.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Multi‐phase electro‐chemical catalytic oxidation of wastewater

Wang

et al. 2006

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

The removal of organic pollutants from synthetic wash wastewater by a combined multi-phase electrocatalytic oxidation method was evaluated using porous graphite as anode and cathode, and CuO-Co 2 O 3 -PO 4 3− modified kaolin as catalyst. The synergic effect on COD removal was studied when integrating the electro-chemical reactor with the effective modified kaolin in a single undivided cell; the results showed that higher COD removal efficiency was obtained than those obtained using the individual processes. Under optimal conditions of pH 3, 30 mA cm −2 current density, very effective reduction of organic pollutants was achieved with this combined electrochemical method. High removal efficiency (90%) of the chemical oxygen demand (COD) was obtained in 60 min in the treatment of simulated wash wastewater (anionic surfactant, sodium dodecyl benzene sulfonate [DBS]). This method was also applied to treat wastewater form paper-making and resulted in a COD reduction of 84%. Based on the investigation, a possible mechanism of this combined electro-chemical process was proposed. The pollutants in wastewater could be decreased by the high reactive OH ž that were produced via the decomposition of electro-generated H 2 O 2 activated by the synergic effect of electro-field and catalyst. The results indicate that the multi-phase catalytic electro-chemical oxidation process is a promising technique for wastewater treatment.

show abstract

Section: Results and Discussion Characteristics Of Catalystmentioning

confidence: 98%

Section: Synergic Effect On Cod Removalmentioning

confidence: 99%

Section: Uv-visible Spectrophotometric Investigationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multi‐phase electro‐chemical catalytic oxidation of wastewater

Wang

et al. 2006

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

Lumped kinetic model for catalytic wet oxidation of organic compounds in industrial wastewater

Zhang

Chuang

1999

AIChE Journal

Self Cite

View full text Add to dashboard Cite

Laccase for biobleaching of eucalypt kraft pulp by means of a modified industrial bleaching sequence

Moldes

Vidal

2012

Biotechnology Progress

View full text Add to dashboard Cite

Biobleaching of kraft pulp is a possible application of laccase, but it has not been described in detail for complete industrial bleaching sequences yet. Therefore, in this work, the biobleaching of Eucalyptus globulus kraft pulp was performed using a modified industrial totally chlorine-free sequence. The modification consisted in the substitution of an enzymatic delignification stage, based on the application of laccase from Trametes villosa, for the first alkaline extraction one. The enzymatic stage was performed with several synthetic and natural mediators, namely 1-hydroxybenzotriazole (HBT), violuric acid (VA), methyl syringate, and syringaldehyde. Several pulp properties were analyzed after each stage of the bleaching process--kappa number, ISO brightness, viscosity, and optical properties of CIEL*a*b* system. The new biobleaching sequence improved the pulp properties, in comparison to the conventional bleaching sequence, if HBT or VA was used as mediators. VA was selected as the best mediator of those tested and the effect of its concentration in the enzymatic stage was subsequently studied. Reducing the initial concentration by 30%, the same pulp quality was obtained, but if the reduction attained 60%, an important decrease in pulp integrity was detected. The modified bleaching sequence could improve the bleached pulp properties (kappa number 10%, ISO brightness 1%, and viscosity 5%) in comparison to the mill sequence.

show abstract

Alumina-Supported Noble Metal Catalysts for Destructive Oxidation of Organic Pollutants in Effluent from a Softwood Kraft Pulp Mill

Cited by 49 publications

References 30 publications

Multi‐phase electro‐chemical catalytic oxidation of wastewater

Multi‐phase electro‐chemical catalytic oxidation of wastewater

Lumped kinetic model for catalytic wet oxidation of organic compounds in industrial wastewater

Laccase for biobleaching of eucalypt kraft pulp by means of a modified industrial bleaching sequence

Contact Info

Product

Resources

About