Universiti Teknologi Malaysia Institutional Repository

Effectiveness of salt-extracted freeze-dried Moringa oleifera as a coagulant

Megat Mohd. Noor, Megat Johari and Mohamed, Ezzuldin Hasan and Mohammad, Thamer Ahmad and Ghazali, Abdul Halim (2015) Effectiveness of salt-extracted freeze-dried Moringa oleifera as a coagulant. Desalition And Water Treatment, 55 (13). pp. 3621-3627. ISSN 1944-3994

Full text not available from this repository.

Official URL: http://www.tandfonline.com/doi/full/10.1080/194439...


The effectiveness of freeze-dried Moringa oleifera (MO) seeds powder in the coagulation of synthetic wastewater was studied. Three modes of extraction were introduced, namely distilled water-extracted freeze-dried M. oleifera (FD-DW MO), salt-extracted freeze-dried M. oleifera (FD-KCl MO), and distilled water-extracted freeze-dried M. oleifera with salt addition (FD-DW MO + KCl). Jar test was used to evaluate the effectiveness of the extracted freeze-dried powder, in the coagulation of a synthetic municipal wastewater. The results show that FD-DW MO at an optimal dosage of 132 mg/l, increases the turbidity removal efficiency to nearly 93% as compared to distilled water-extracted MO which gave 76% removal at an optimal dosage of 300 mg/l. However, the comparison of FD-KCl MO with non-FD-KCl MO show that the freeze-drying neither improves the efficiency of salt-extracted M. oleifera nor the optimal dosage. On the other hand, adding KCl to the FD-DW MO in treating high turbidity synthetic wastewater at 200 ± 5 NTU improved the optimal dosage from 40 mg/l (without adding KCl) to 10 mg/l corresponding to 91% removal efficiency. As a conclusion, the freeze-drying process did not improve the coagulation efficiency with salt-extracted MO using KCL. But using the salt (KCL) solution for dilution of FD-DW MO causes the optimal dosage to decrease from 40 mg/l (using distilled water for dilution) to 10 mg/l. This is associated with a slight decrease in the efficiency from 92.73 to 91.32%.

Item Type:Article
Subjects:A General Works
ID Code:58409
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:17 Sep 2017 14:59

Repository Staff Only: item control page