Characterization and performance of carbonaceous materials obtained from exhausted sludges for the anaerobic biodecolorization of the azo dye Acid Orange II.

Athalathil, S; Stüber, Frank; Bengoa, C; Font, J; Fortuny, A; Fabregat, A (2014). Characterization and performance of carbonaceous materials obtained from exhausted sludges for the anaerobic biodecolorization of the azo dye Acid Orange II. Journal of hazardous materials, 267, pp. 21-30. Elsevier 10.1016/j.jhazmat.2013.12.031

[img] Text
1-s2.0-S0304389413009618-main.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (2MB) | Request a copy

This work presents the preliminary study of new carbonaceous materials (CMs) obtained from exhausted sludge, their use in the heterogeneous anaerobic process of biodecolorization of azo dyes and the comparison of their performance with one commercial active carbon. The preparation of carbonaceous materials was conducted through chemical activation and carbonization. Chemical activation was carried out through impregnation of sludge-exhausted materials with ZnCl2 and the activation by means of carbonization at different temperatures (400, 600 and 800°C). Their physicochemical and surface characteristics were also investigated. Sludge based carbonaceous (SBC) materials SBC400, SBC600 and SBC800 present values of 13.0, 111.3 and 202.0m(2)/g of surface area. Biodecolorization levels of 76% were achieved for SBC600 and 86% for SBC800 at space time (τ) of 1.0min, similar to that obtained with commercial activated carbons in the continuous anaerobic up-flow packed bed reactor (UPBR). The experimental data fit well to the first order kinetic model and equilibrium data are well represented by the Langmuir isotherm model. Carbonaceous materials show high level of biodecolorization even at very short space times. Results indicate that carbonaceous materials prepared from sludge-exhausted materials have outstanding textural properties and significant degradation capacity for treating textile effluents.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Intensive Care, Emergency Medicine and Anaesthesiology (DINA) > Clinic and Policlinic for Anaesthesiology and Pain Therapy

UniBE Contributor:

Stüber, Frank

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0304-3894

Publisher:

Elsevier

Language:

English

Submitter:

Jeannie Wurz

Date Deposited:

01 Jul 2015 10:32

Last Modified:

23 Jan 2018 12:15

Publisher DOI:

10.1016/j.jhazmat.2013.12.031

PubMed ID:

24413048

Uncontrolled Keywords:

Azo dye; Biodecolorization; Biological carbonaceous material; Sewage exhausted materials

BORIS DOI:

10.7892/boris.70048

URI:

https://boris.unibe.ch/id/eprint/70048

Actions (login required)

Edit item Edit item
Provide Feedback