Effects of induced salinity on BOD reaction kinetics of river water samples (Kesan peningkatan kemasinan terhadap kinetik tindak balas keperluan oksigen biokimia 5 hari menggunakan sampel air sungai)

Zainudin, Zaki and Mohamed, Maketab and Ramli, Mohd. Rosslim (2010) Effects of induced salinity on BOD reaction kinetics of river water samples (Kesan peningkatan kemasinan terhadap kinetik tindak balas keperluan oksigen biokimia 5 hari menggunakan sampel air sungai). The Malaysian Journal of Analytical Sciences, 14 (1). pp. 24-31. ISSN 1394-2506

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Abstract

Biochemical Oxygen Demand (BOD) is a typical parameter used in assessing organic pollution strength in surface waters and is normally tested over a 5-day period at an incubation temperature of 20°C (BOD5). The accuracy of this constituent, in assessing organic contamination under brackish conditions has always been known to be somewhat limited as elevated concentrations of chloride (Cl-) disrupts microbial activity from osmotic cellular degradation, causing the bottle decay rate, k1, to be effected. The aim of this study was to quantify the effects of induced salinity on k1, with varying levels of sodium chloride (NaCl) concentration (5 – 25 ppt), towards six mildly polluted to polluted tropical river water samples. The observed variations ranged between 0.10 – 0.25/day of k1 for the stipulated samples using the Thomas graphical method for determination of the k1 rate constant. Sg. Rawang depicted the highest quantum of difference in k1, with decrement from 0.754/day (0 ppt) to 0.513/day (25 ppt), whereas Sg. Klang showed the lowest quantum, from 0.306/day (0 ppt) to 0.265/day (25 ppt).

Item Type:	Article (Journal)
Additional Information:	6601/3053
Uncontrolled Keywords:	BOD, saline, brackish, estuarine, bottle decay rate
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA170 Environmental engineering. Sustainable engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC401 River, lake, and water-supply engineering (General) T Technology > TD Environmental technology. Sanitary engineering > TD169 Environmental protection T Technology > TD Environmental technology. Sanitary engineering > TD172 Environmental pollution
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User:	Assoc. Prof. Ir. Dr. Zaki Zainudin
Date Deposited:	03 Oct 2011 12:48
Last Modified:	03 Oct 2011 12:48
URI:	http://irep.iium.edu.my/id/eprint/3053

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