期刊
MOLECULES
卷 26, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/molecules26030698
关键词
alum; eggshells; coagulation kinetics; ferromagnetite; magnetic coagulants; nanomaterials; wastewater treatment
资金
- Water Research Commission (WRC), South Africa [C2019/2020-00212]
This study investigated the use of ferromagnetite, alum, and eggshells as cost-effective coagulants for industrial wastewater treatment. The results showed that at optimal dosage and settling time, ferromagnetite was the most effective in removing contaminants from the wastewater.
In this study, three coagulants (ferromagnetite (F), alum (A), and eggshells (E)) and their hybrids (FA, FE, and FEA) were investigated as possible cost-effective coagulants for the treatment of industrial wastewater. Scanning electron microscopy (SEM) coupled with energy-dispersive X-ray (EDX) was used to characterize the morphological and elemental compositions of the coagulants. The effects of coagulant dosage (10-60 mg/L) and settling time were investigated for the removal of turbidity, color, and total suspended solids. A jar tester (JTL6) operating at conditions of 150 rpm for 2 min (rapid mixing) and 30 rpm for 15 min (slow mixing) was employed. Results from the characterized supernatant showed about 80% removal of the contaminants. The prospects of F were proven to be the most effective as compared to the binary (FA > FE) and the ternary hybridized (FEA) coagulants. At an optimum dosage and settling time of 20 mg/L and 30 min, respectively, the treatability performance of F was clearly proven to be viable for wastewater treatment.
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