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Advanced treatment of wastewater with methyl orange and heavy metals on TiO2, fly ash and their mixtures

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Abstract.
Dyes and heavy metals represent common, dangerous pollutants, resulting in large quantities in the
textile finishing industry. Advanced removal of heavy metals is usually proposed via adsorption and the
use of modified fly ash represents a sustainable solution. Photodegradation of dyes using anatase is
largely studied and represents a process that can be up-scaled. For wastewater containing both heavy
metals and dyes, an obvious treatment technology is thus the association of modified fly ash with
anatase. During this process, the substrates are loaded with both pollutants and their efficiency must be
quantified under these conditions. The study presents the results obtained in Cd2+ and Cu2+ removal,
using fly ash (FA) with dye modified surface and its mixtures with TiO2. The FA morphology is
characterised using AFM while XRD provides the crystallinity data. The adsorption parameters (contact
time, wastewater volume:adsorbent mass ratio) were optimized and the adsorption mechanisms are
discussed. The experimental results indicate that adsorption of cadmium and copper ions can be
significantly improved by usingmixtures of FA with TiO2. The best adsorption efficiency is registered on
mixture with 25% of TiO2.

Keywords:
TiO2
Fly ash
Methyl orange
Heavy metal

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Informasi Detail

Judul Seri

Catalysis Today

No. Panggil

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Penerbit

lop : Elsevier B.V.., 2009

Deskripsi Fisik

Catalysis Today 144 (2009) 137–142

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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