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Competitive Adsorption Between Phenol, Aniline and n-Heptane in Tailrace Coking Wastewater

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Abstract

The competitive adsorption of organic pollutants—phenol, aniline and n-heptane—from biologically treated coking wastewater on powdered activated carbon (PAC) was studied. Firstly, batch adsorption experiments of coking wastewater were conducted to investigate the effect of pH and temperature on their adsorption. Results showed that long-chain alkanes, benzoic, halogenated and phenolic compounds were adsorbed well under acidic condition, while amines were adsorbed well under alkaline condition; maximum co-adsorption amount of all kinds of organic compounds occurred at around pH 5. Then, Lagergren kinetic model and pseudo-second-order kinetic model were used to describe the adsorption process of phenol and aniline on PAC. The data were fitted very well with pseudo-second-order kinetics, and the adsorption capacity decreased with an increase in temperature, belonging to Freundlich multi-layer physical adsorption. The adsorption speed and capacity of phenol were superior to aniline in unitary and binary solution. The adsorption amount of n-heptane decreased by 26.6 % from ternary competitive absorption system of phenol, aniline and n-heptane compared with that in unitary solutions, which showed that phenol and aniline caused spatial adsorption steric hindrance to n-heptane.

Keywords : Coking wastewater, Powdered activated carbon, Competitive adsorption, Phenol, Aniline, n-Heptane

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Informasi Detail

Judul Seri

Water Air Soil Pollution (2013) 224:1365

No. Panggil

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Penerbit

: Springer Netherlands., 2013

Deskripsi Fisik

Water Air Soil Pollution (2013) 224:1365

Bahasa

English

ISBN/ISSN

1573-2932

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

ILMU LINGKUNGAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

Ety

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