+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Influence of humic acid type on the oxidation products of pentachlorophenol using hybrid catalysts prepared by introducing iron(III)-5,10,15,20-tetrakis(p-hydroxyphenyl) porphyrin into hydroquinone-derived humic acids



Influence of humic acid type on the oxidation products of pentachlorophenol using hybrid catalysts prepared by introducing iron(III)-5,10,15,20-tetrakis(p-hydroxyphenyl) porphyrin into hydroquinone-derived humic acids



Chemosphere 78(9): 1155-1159



An iron(III)-5,10,15,20-tetrakis(p-hydroxyphenyl) porphyrin (FeTHP) was introduced into hydroquinone-derived humic acids via formaldehyde polycondensation. The influence of humic acid (HA) type on the catalytic oxidation of pentachlorophenol (PCP) was investigated using two HAs as follows: Shinshinotsu peat (SHA) with a lower carboxylic acid content; Tohro ando soil (THA) with a higher carboxylic acid content. The levels of PCP degradation and dechlorination for the catalysts prepared using SHA (SHA-FeTHP) and THA (THA-FeTHP) were significantly higher than those for FeTHP. In terms of oxidation products, the more toxic dimer, octachlorodibenzo-p-dioxin (OCDD), was not produced in the case of the SHA-FeTHP system, while 4-7% of the PCP was converted to OCDD when the FeTHP and THA-FeTHP catalytic systems were used. These results indicate that a catalyst prepared using SHA is more active, in terms of the detoxification of PCP, than other catalysts. Comparisons of UV-Vis absorption spectra before and after the catalytic oxidation showed that the Soret band for SHA-FeTHP clearly remained after a 30-min incubation period, while the intensity of the majority of Soret bands for FeTHP and THA-FeTHP were rapidly reduced after a 5-min incubation period. These results suggest that the SHA-FeTHP is a stable catalyst, and this stability results in a more extensive oxidation of the more toxic byproducts.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 053843755

Download citation: RISBibTeXText

PMID: 20042219

DOI: 10.1016/j.chemosphere.2009.12.010


Related references

Influence of humic acid type on the oxidation products of pentachlorophenol using hybrid catalysts prepared by introducing iron -5,10,15,20-tetrakis porphyrin into hydroquinone-derived humic acids. Chemosphere: 9, 1155-1159, 2010

Oxidative degradation of 2,6-dibromophenol using anion-exchange resin supported supramolecular catalysts of iron(III)-5,10,15,20-tetrakis (p-hydroxyphenyl)porphyrin bound to humic acid prepared via formaldehyde and urea-formaldehyde polycondensation. Journal of Environmental Science and Health. Part A Toxic/Hazardous Substances and Environmental Engineering 45(12): 1536-1542, 2010

Pattern of oxidation products derived from tetrabromobisphenol A in a catalytic system comprised of iron(III)-tetrakis(p-sulfophenyl)porphyrin, KHSO5 and humic acids. Chemosphere 80(8): 860-865, 2010

Comparison of the oxidation products produced by tetrahalobisphenol A flame retardants as a result of potassium monopersulfate oxidation with an iron(III)-tetrakis(p-sulfonatophenyl)porphyrin in the presence of humic acid. Journal of Environmental Science and Health. Part A Toxic/Hazardous Substances and Environmental Engineering 49(4): 365-375, 2014

Humic acids. X. The effect on the root growth of spring wheat of thy mo-hydroquinone as model substance of pre-humic acids or decomposition products of humic acid.. Z. PflErnahr. Dung 71: 208-215, 1955

Oxidative degradation of 2,4,6-trichlorophenol and pentachlorophenol in contaminated soil suspensions using a supramolecular catalyst of 5,10,15,20-tetrakis (p-hydroxyphenyl)porphine-iron(III) bound to humic acid via formaldehyde polycondensation. Journal of Environmental Science and Health. Part A Toxic/Hazardous Substances and Environmental Engineering 44(11): 1088-1097, 2009

Complex formation of water-soluble iron(III)-porphyrin with humic acids and their effects on the catalytic oxidation of pentachlorophenol. Journal of Molecular Catalysis A: Chemical 245(1-2): 178-184, 2006

Introduction of 5,10,15,20-tetrakis(4-hydroxyphenyl)-porphine iron(III) into humic acid via formaldehyde polycondensation. Journal of Molecular Catalysis A: Chemical 293(1-2): 103-109, 2008

Humic acids. XII. Investigations on the effect on respiration of cereals of thymohydro-quinone as model substance of pre-humic acids or decomposition products of humic acid.. Z. PflErnahr. Dung 72: 1-7, 1956

Humic acids. VI. Investigation of the acceleration of dehydration reactions by model substances of pre-humic acids and humic-acid decomposition products.. Z. PflErnahr. Dung 68: 255-269, 1955

Humic acids. XI. The effect on germination of cereals of thymohydroquinone as model substance of pre-humic acids or decomposition products of humic acid.. Z. PflErnahr. Dung, 7I: 215-224, 1955

Humic acids. XIII. Investigations on the effect on early development of cereals in Neubauer pots of thymohydroquinone as model substance of pre-humic acids or decomposition products of humic acid.. Z. PflErnahr. Dung 72: 7-15, 1956

Oxidative degradation of pentachlorophenol by an iron(III)-porphyrin catalyst bound to humic acid via formaldehyde polycondensation. Journal of Molecular Catalysis A: Chemical 286(1-2): 47-54, 2008

Influence of Humic Substances on the Removal of Pentachlorophenol by a Biomimetic Catalytic System with a Water-Soluble Iron(III)-Porphyrin Complex. Environmental Science and Technology 37(5): 31-6, 2003

Arsenite and arsenate binding to dissolved humic acids: influence of pH, type of humic acid, and aluminum. Environmental Science & Technology 40(19): 6015-6020, 2006