Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/13485
Title: Characterisation of adsorbents prepared by pyrolysis of sludge and sludge/disposal filter cake mix
Authors: VELGHE, Inge 
CARLEER, Robert 
YPERMAN, Jan 
SCHREURS, Sonja 
D'HAEN, Jan 
Issue Date: 2012
Source: WATER RESEARCH, 46 (8), p. 2783-2794
Abstract: Copper and zinc removal from water (pH = 5.0) using adsorbents produced from slow and fast pyrolysis of industrial sludge and industrial sludge mixed with a disposal filter cake (FC), post treated with HCl, is investigated in comparison with a commercial adsorbent F400. The results show that a pseudo-second order kinetics model is followed. The Langmuir–Freundlich isotherm model is found to fit the data best. The capacity for heavy metal removal of studied adsorbents is generally better than that of commercial F400. The dominant heavy metal removal mechanism is cation exchange. Higher heavy metal removal capacity is associated with fast pyrolysis adsorbents and sludge/FC derived adsorbents, due to enhanced cation exchange. Improvement of Zn2+ removal via 1 N HCl post-treatment is only effective when exchangeable cations of the adsorbent are substituted with H+ ions, which boost the cation exchange capacity. Increase of temperature also enhances metal removal capacity. Fast pyrolysis sludge-based adsorbents can be reused after several adsorption–desorption cycles.
Keywords: Adsorbent; Pyrolysis; Metal; Sludge; Disposal filter cake
Document URI: http://hdl.handle.net/1942/13485
ISSN: 0043-1354
e-ISSN: 1879-2448
DOI: 10.1016/j.watres.2012.02.034
ISI #: 000303035400028
Category: A1
Type: Journal Contribution
Validations: ecoom 2013
Appears in Collections:Research publications

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