The removal of pollutants and natural organic compounds from acid mine drainage using a combination of bentonite clay and MgSO4 | Zendy

I. O. Ntwampe | Zendy

Open Access

The removal of pollutants and natural organic compounds from acid mine drainage using a combination of bentonite clay and MgSO4

Author(s) -

I. O. Ntwampe

Publication year - 2021

Publication title -

water practice and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.243

H-Index - 15

ISSN - 1751-231X

DOI - 10.2166/wpt.2021.015

Subject(s) - bentonite , reagent , acid mine drainage , flocculation , sorption , turbidity , chemistry , environmental chemistry , pollutant , pulp and paper industry , mineralogy , adsorption , geology , geotechnical engineering , oceanography , organic chemistry , engineering

200 mL of synthetic acid mine drainage (AMD) sample was poured into five 500 mL glass beakers and treated in a jar test and a shaker in sets of experiments, respectively. The samples were treated in small-scale laboratory experiments using synthetic AMD sample dosed with bentonite clay and MgSO4 respectively, and a flocculant consisting of the same reagents. The pH, EC, turbidity and oxidation reduction potential were measured. The removal of turbid materials in the samples dosed with a flocculant is higher compared to those of the samples dosed with each reagent alone. The samples with flocculant dosage show high removal efficiency of natural organic compounds and toxic metals, slightly higher compared to those with a dosage of a combination of bentonite clay and MgSO4. The removal efficiency of the samples treated in a shaker is better than those with rapid mixing. The SEM micrographs show sorption is a physico-chemical phenomenon.

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