Coagulation Treatment of Wastewater: Kinetics and Natural Coagulant Evaluation

被引：78

作者：

Precious Sibiya, Nomthandazo ^{[1
]}

Rathilal, Sudesh ^{[1
]}

Kweinor Tetteh, Emmanuel ^{[1
]}

机构：

[1] Durban Univ Technol, Fac Engn & Built Environm, Dept Chem Engn, Green Engn & Sustainabil Res Grp, ZA-4001 Durban, South Africa

来源：

MOLECULES | 2021年 / 26卷 / 03期

关键词：

alum; eggshells; coagulation kinetics; ferromagnetite; magnetic coagulants; nanomaterials; wastewater treatment; NANOPARTICLES; REMOVAL;

D O I：

10.3390/molecules26030698

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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.

引用

页数：15

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