Electron donor influence in metal sulfide recovery from acid mine drainage

• Grant number: 16/13603-3
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: September 01, 2017
• End date: November 30, 2021
• Field of knowledge: Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Denise Bevilaqua
• Grantee: Rachel Biancalana Costa
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated scholarship(s): 18/01524-7 - Assessment of sugarcane bagasse as a slow electron donor for sulphate reduction coupled to metal recovery from acid mine drainage, BE.EP.PD

Abstract

This work aims to study the influence of various electron donors for sulfate reduction in acid mine drainage (AMD), focusing sulfide metals precipitation and recovery. Although previous research had investigated the effect of electron donors over the sulfate reducers bacteria performance, it is not clear how these compounds interfere with metal removal mechanisms. Thus, it is important to distinguish the different mechanisms to optimize metal recovery. Besides, this work also proposes to associate AMD treatment with other types of wastewater. This research plan targets copper, cobalt and nickel recovery. The work will be developed in three stages. In the first of them, the interference of carboxylic acids over the precipitation of metal sulfide will be studied. Carboxyl groups bind to metal ions, and this property is used on adsorption based technologies for metal removal. Despite it, there are no reports of how such binding occurs in sulfate-reducing environments. In the second stage, different electron donors will be tested, focusing on the influence on the precipitation of metal sulfides. At this stage of pure electron donors will be studied. In the last step a blend of electrons donors will be tested for the sulfate reduction aiming metal recovery from acid mine drainage.. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

COSTA, RACHEL BIANCALANA; GOUVEA GODOI, LEANDRO AUGUSTO; MALUF BRAGA, ADRIANA FERREIRA; DELFORNO, TIAGO PALLADINO; BEVILAQUA, DENISE. Sulfate removal rate and metal recovery as settling precipitates in bioreactors: Influence of electron donors. JOURNAL OF HAZARDOUS MATERIALS, v. 403, FEB 5 2021. (18/00213-8, 16/13603-3)