Leachability and physical stability of solidified and stabilized pyrite cinder sludge from dye effluent treatment

Author:

Kerkez Djurdja1,Becelic-Tomin Milena1,Dalmacija Milena1,Tomasevic Dragana1,Roncevic Srdjan1,Pucar Gordana1,Dalmacija Bozo1

Affiliation:

1. Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Novi Sad

Abstract

This work is concerned with exploring the possibilities of using solidification/stabilization (S/S) treatment for toxic sludge generated in dye effluent treatment, when pyrite cinder is used as catalytic iron source in the modified heterogeneous Fenton process. S/S treatment was performed by using different clay materials (kaolin, bentonite and native clay from the territory of Vojvodina) and fly ash in order to immobilize toxic metals and arsenic presented in sludge. For the evaluation of the extraction potential of toxic metals and the effectiveness of the S/S treatment applied, four single-step leaching tests were performed. Leaching test results indicated that all applied S/S treatments were effective in immobilizing toxic metals and arsenic presented in sludge. X-ray diffraction analysis confirmed the formation of pozzolanic products, and compressive strength measurement proved the treatment efficacy. It can be concluded that the S/S technique has significant potential for solving the problem of hazardous industrial waste and its safe disposal.

Funder

Ministry of Education, Science and Technological Development of the Republic of Serbia

Publisher

National Library of Serbia

Subject

General Chemical Engineering,General Chemistry

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