Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance

Mechanistic studies on a charged ultrafiltration (UF) membrane fouled with natural organic matter (NOM) and colloidal particles are systematically investigated to understand the relative role of each NOM fraction and the presence of colloidal particulate to membrane fouling. Humic acid (HA),dextran,...

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Main Authors:	Zularisam, A. W., Mimi Sakinah, A. M., Siddique, Md. Nurul Islam
Format:	Conference or Workshop Item
Language:	English
Published:	2013
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/5688/ http://umpir.ump.edu.my/id/eprint/5688/1/CHEM-001.pdf

id	ump-5688
recordtype	eprints
spelling	ump-56882018-01-17T04:13:34Z http://umpir.ump.edu.my/id/eprint/5688/ Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance Zularisam, A. W. Mimi Sakinah, A. M. Siddique, Md. Nurul Islam TP Chemical technology Mechanistic studies on a charged ultrafiltration (UF) membrane fouled with natural organic matter (NOM) and colloidal particles are systematically investigated to understand the relative role of each NOM fraction and the presence of colloidal particulate to membrane fouling. Humic acid (HA),dextran, and kaolin were employed as surrogate model foulants representing the organic hydrophobic acid NOM, hydrophilic neutral NOM, and inorganic colloidal materials, respectively. The results obtained showed that the organic NOM of hydrophilic surrogate (dextran) plays a primary role in promoting membrane fouling, followed by hydrophobic acids and inorganic kaolin, but to a lesser extent than organic NOM compounds. Significant differences in the extent of fouling between dextran and HA have been observed despite filtering with identical membrane. Greater membrane fluxes and better DOC rejection shown by HA could be seen as evidence demonstrating the electrostatic interactions between HA and the negatively charged membrane surface, in addition to the steric hindrance mechanism, despite possessing relatively greater adsorptive interactions with the hydrophobic PSF membrane. These results suggest that NOM structural variations (aromatic versus aliphatic molecular structure), distribution (apparent molecular weight and size), and charge density are essential factors that determine the fouling potential of each NOM fraction. Feed solution containing all the NOM fractions (HA, dextran, and kaolin) fouled the membrane more readily than the individual organic and colloidal foulants, suggesting that an association of the latter two entities is responsible for the greater extent of membrane fouling. Furthermore, the electrokinetic effects of solution chemistry (ionic strength and Ca2+) was employed to quantify the role of electrostatic interactions in providing principal effect that promotes better permeate flux and NOM rejection, particularly with the charged component such as HA. Moreover, observation of this study is beneficial in elucidating a clearer understanding on the influential factors and responsible mechanisms of UF fouling owing to single NOM solute and multiple NOM solute systems, with respect to membrane filterability and rejection efficiency. 2013 Conference or Workshop Item PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/5688/1/CHEM-001.pdf Zularisam, A. W. and Mimi Sakinah, A. M. and Siddique, Md. Nurul Islam (2013) Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance. In: Malaysian Technical Universities Conference on Engineering & Technology (MUCET 2013), 3-4 December 2013 , Kuantan, Pahang. pp. 1-2..
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Zularisam, A. W. Mimi Sakinah, A. M. Siddique, Md. Nurul Islam Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance
description	Mechanistic studies on a charged ultrafiltration (UF) membrane fouled with natural organic matter (NOM) and colloidal particles are systematically investigated to understand the relative role of each NOM fraction and the presence of colloidal particulate to membrane fouling. Humic acid (HA),dextran, and kaolin were employed as surrogate model foulants representing the organic hydrophobic acid NOM, hydrophilic neutral NOM, and inorganic colloidal materials, respectively. The results obtained showed that the organic NOM of hydrophilic surrogate (dextran) plays a primary role in promoting membrane fouling, followed by hydrophobic acids and inorganic kaolin, but to a lesser extent than organic NOM compounds. Significant differences in the extent of fouling between dextran and HA have been observed despite filtering with identical membrane. Greater membrane fluxes and better DOC rejection shown by HA could be seen as evidence demonstrating the electrostatic interactions between HA and the negatively charged membrane surface, in addition to the steric hindrance mechanism, despite possessing relatively greater adsorptive interactions with the hydrophobic PSF membrane. These results suggest that NOM structural variations (aromatic versus aliphatic molecular structure), distribution (apparent molecular weight and size), and charge density are essential factors that determine the fouling potential of each NOM fraction. Feed solution containing all the NOM fractions (HA, dextran, and kaolin) fouled the membrane more readily than the individual organic and colloidal foulants, suggesting that an association of the latter two entities is responsible for the greater extent of membrane fouling. Furthermore, the electrokinetic effects of solution chemistry (ionic strength and Ca2+) was employed to quantify the role of electrostatic interactions in providing principal effect that promotes better permeate flux and NOM rejection, particularly with the charged component such as HA. Moreover, observation of this study is beneficial in elucidating a clearer understanding on the influential factors and responsible mechanisms of UF fouling owing to single NOM solute and multiple NOM solute systems, with respect to membrane filterability and rejection efficiency.
format	Conference or Workshop Item
author	Zularisam, A. W. Mimi Sakinah, A. M. Siddique, Md. Nurul Islam
author_facet	Zularisam, A. W. Mimi Sakinah, A. M. Siddique, Md. Nurul Islam
author_sort	Zularisam, A. W.
title	Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance
title_short	Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance
title_full	Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance
title_fullStr	Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance
title_full_unstemmed	Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance
title_sort	behaviour of natural organic matter (nom), colloidal particle and solution chemistry on ultra-filtration performance
publishDate	2013
url	http://umpir.ump.edu.my/id/eprint/5688/ http://umpir.ump.edu.my/id/eprint/5688/1/CHEM-001.pdf
first_indexed	2023-09-18T22:01:04Z
last_indexed	2023-09-18T22:01:04Z
_version_	1777414401601568768

Behaviour of Natural Organic Matter (NOM), Colloidal Particle and Solution Chemistry on Ultra-filtration Performance

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