Abatement of pollutants by adsorption and oxidative catalytic regeneration

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie960809d· OSTI ID:562145

Matatov-Meytal, Y I; Sheintuch, M ^[1]

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1. Technion-Israel Inst. of Tech., Haifa (Israel). Dept. of Chemical Engineering

The adsorption of phenol, and halogenated phenols on granular activated carbon (AC) modified with metal oxide catalyst, followed by catalytic oxidative regeneration, was studied as an efficient technology for the treatment of dilute wastewaters. The advantages of the combination of these technologies are as follows: (1) the process will be accelerated by the high concentrations of pollutants eluted from the adsorbent; (2) a large number of adsorption-regeneration cycles are expected without loss in capacity; and (3) the low-temperature regeneration will be conducted in situ, even in small units, thus improving the economy of the process. Oxidative catalytic regeneration of spent carbons, performed at 240--300 C with air, completely restored the adsorption capacity of phenol on the ACs modified with catalyst, even after 10 cycles of regeneration. Under similar conditions, only partial recovery of the adsorption capacity was obtained for carbons loaded with p-chlorophenol and p-bromophenol. The adsorption capacity and the surface area of the AC (Filtrasorb-400) diminished somewhat with the impregnation of oxides (Fe{sub 2}O{sub 3}, CuO, and additivities of Cr{sub 2}O{sub 3} or inert silica), but that did not affect the shape of the adsorption isotherms.

• OSTI ID: 562145
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 10 Vol. 36; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
ACTIVATED CARBON
ADSORPTION
CATALYSTS
HALOGENATED AROMATIC HYDROCARBONS
PHENOLS
REGENERATION
SORPTIVE PROPERTIES
WASTE WATER
WATER TREATMENT