photocatalytic degradation of anionic azo dyes acid orange 7 and acid red 88 in aqueous solutions using tio2-containing hydrogel

Authors

morteza bahram

department of chemistry, faculty of science, urmia university, urmia, iran saed salami

department of chemistry, faculty of science, urmia university, urmia, iran mehdi moghtader

department of chemistry, faculty of science, urmia university, urmia, iran peyman najafi moghadam

department of chemistry, faculty of science, urmia university, urmia, iran amir reza fareghi

abstract

the photocatalytic degradation of two anionic azo dyes acid red88 (ar 88) and acid orange 7 (ao7) was investigated in aqueous solution using a tio2-containing hydrogel and uv light. the ph-sensitive hydrogel poly (styrene-alt-maleic anhydride) (psma), was synthesized and crosslinked in the presence of melamine and tio2 nanoparticles which results in entrapment of tio 2 into the melamine-grafted psma (m-g-psma) hydrogel. potential application of this nanocomposite for removal of azo dyes from wastewater was studied and the effective parameters on degradation process including time, initial ph value of the solutions, temperature and amount of added nanocomposite were optimized. the optimized values for effective parameters are as follows: time: 30 min, initial ph of the solutions: 5.23 for ao7 and 5.3 for ar88, temperature: 24 ºc and amount of added nanocomposite: 250 mg. results showed that in optimum experimental conditions the removal percentages are about %94 for ar88 and %71 for ao7 indicating good removal performance toward the method whilst ph-sensitivity of the nanocomposite facilitates retrieval of nanocatalyst at the end of the reaction.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Photocatalytic Degradation of Anionic Azo Dyes Acid Orange 7 and Acid Red 88 in Aqueous Solutions Using TiO2-containing Hydrogel

      The photocatalytic degradation of two anionic azo dyes Acid Red88 (AR 88) and Acid Orange 7 (AO7) was investigated in aqueous solution using a TiO2-containing hydrogel and UV light. The pH-sensitive hydrogel poly (styrene-alt-maleic anhydride) (PSMA), was synthesized and crosslinked in the presence of melamine and TiO2 nanoparticles which results in entrapment of TiO...

full text

Photocatalytic Degradation of Azo Dye Acid Red 14 from Aqueous Solutions Using MWCNTs Nanocatalyst

Background & Aims of the Study: Azo Dyes are the most hazardous materials in different industries. Dyes and pigments used in industries for applications such as textiles, leathers, papers, foodstuffs, additives, etc. Application amounts of azo dyes in industries which can cause severe health problems in human and environmental pollutant problems. So, color wastewaters decomposition plan are...

full text

Photocatalytic degradation of an azo dye, Acid Red 27, in aqueous solution using nano ZnO

Photocatalytic degradation of Acid Red 27 by nano ZnO has been investigated under different conditions. Optimum experimental conditions on catalyst amount, pH and dye concentration have been determined. Addition of some inorganic oxidizing species such as H2O2, K2S2O8 and KBrO3 up to a certain concentration increases the rate of degradation. The photodecolourisation and degradation kinetics are...

full text

Photocatalytic Degradation of an Anionic Surfactant by Tio2 Nanoparticle under UV Radiation in Aqueous Solutions

In this paper the photocatalytic degradation of the anionic surfactant, linear alkylbenzene sulfonicacid (LABSA) was investigated using UV radiation in the presence of TiO2. Our findingsdemonstrate that various parameters exert their individual influence on the photocatalytic degradationof surfactant in wastewaters. The mentioned parameters have been categorized as follow: the initialpH of the ...

full text

Removal of Anionic Dyes (Direct Blue 106 and Acid Green 25) from Aqueous Solutions Using Oxidized Multi-Walled Carbon Nanotubes

Background and purpose:The presence of dyes in wastewaters may cause serious problems for the environment because of their high toxicity to aquatic organisms and unfavorable aesthetical impact. In the present study, multi-walled carbon nanotubes (MWCNTs) were used for removal of anionic dyes Direct Blue 106 (DB106) and Acid Green 25 (AG25), from water samples. Materials and Methods:MWCNTs were ...

full text

My Resources

Save resource for easier access later


Journal title:
analytical and bioanalytical chemistry research

جلد ۴، شماره ۱، صفحات ۵۳-۶۳

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023