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Sequestering of pollutants from public market wastewater using Moringa oleifera and Cicer arietinum flocculants

Mohd, Rosmawanie and Radin Mohamed, Radin Maya Saphira and Al-Gheethi, Adel and Pahazri, Fadzilla and Mohd Kassim, Amir Hashim and Mohd Zin, Shaylinda (2018) Sequestering of pollutants from public market wastewater using Moringa oleifera and Cicer arietinum flocculants. Journal of Environmental Chemical Engineering, 6 (2). pp. 2417-2428. ISSN 22133437

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Abstract

The present study aimed to investigate potential of Moringa oleifera and Cicer arietinum seeds for the treatment of public market wastewater in comparison to Alum and FeSO4. The flocculation process was assessed as a function of adsorbent dose (60-360 mg/L), pH (4 to 9) and mixing rate (50 to 300 rpm). The adsorption study was performed to find out the removal of biological oxygen demand (BOD5), chemical oxygen demand (COD), total suspended solids (TSS), oil and grease (O&G), colour, and turbidity in a lab-scale plant system (6 L). The results revealed that the use of M. oleifera resulted in the highest removal for BOD5, COD and O&G (68.08%, 79.1 % and 83.3 % respectively) at 180 mg /L, pH 7 to 8, and a mixing rate of 150 rpm. The use of Alum resulted in the highest removal percentage for TSS, colour and turbidity (87.17, 90.83 and 81.06% respectively) at 120 mg/L, pH 7 to 8, and a mixing rate of 150 rpm. The Langmuir adsorption isotherm was the best model for the removal of turbidity by M. oleifera and C. arietinum (R2=0.91 and 0.93) compared to the Freundlich model (R2=0.81 and 0.82). Moreover, the adsorption of COD (R2= 0.91) by M. oleifera was fitted to both the Langmuir and Freundlich isotherms. In contrast, the Freundlich isotherm was the best for studying the removal of COD (R2= 0.96) and O& G (R2=0.99) by C. arietinum. The findings obtained indicated that natural coagulants are applicable for improving the quality of public market wastewater.

Item Type: Article
Uncontrolled Keywords: Langmuir model; Freundlich model; Alum; natural coagulants; lab-scale plant system
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD201-500 Water supply for domestic and industrial purposes
Divisions: Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 23 Jun 2019 07:00
Last Modified: 23 Jun 2019 07:00
URI: http://eprints.uthm.edu.my/id/eprint/11225
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