03053ntm a2200349 i 4500 MY-KuUP 20260625122332.0 t|||||r|||| 000 0 ta 260625t20242024my a|||fr|||| 000 0 eng d THE0010642 (Local) Hardback UMPSA eng UMPSA rda FTKKP .N35 2024 r Bc. Siti Najiah Binti Ahmad Subkey, author. Effect of various redox conditions on anaerobic biodegradation of 1,2 – dichloroethane by sungai ular sediment Siti Najiah Binti Ahmad Subkey Kuantan, Pahang : UMPSA, 2024 © 2024 40 pages : illustrations ; rdacontent text rdamedia unmediated rdacarrier volume rda text file PDF Faculty of Chemical and Process Engineering Technology Final Year Report (Bachelor of Chemical Engineering ) -- Universiti Malaysia Pahang Al-Sultan Abdullah - 2024 Include bibliographical reference Chlorinated compounds are serious environmental contaminants due to their high toxicity, which is harmful to human health and the environment when present in groundwater and soil. 1,2- dichloroethane (1,2-DCA) was an example of a chlorinated compound that was usually used in industry. Anaerobic biodegradation is a cost-effective and efficient method for remediating chlorinated sediments because it converts toxic compounds into non-toxic byproducts via organohalide respiring bacteria (OHRB). On the other hand, redox conditions such as iron and nitrate reduction will increase the metabolic activity and growth of OHRB, resulting in faster biodegradation of 1,2-DCA while sulphate reducing bacteria may be unfavorable to OHRB bacteria because they compete for hydrogen. The aim of this study was to investigate the effect of different redox conditions on 1,2-DCA degradation by OHRB in Sungai Ular sediment. The degradation of 1,2-DCA were tested under different redox conditions such as nitrate reducing, iron reducing and sulfate reducing with three different concentrations of the respective compounds. The 1,2-DCA was added to a nominal concentration of 100 μM. The concentration of redox condition was varied to observe the biodegradation rate of 1,2-DCA. The results showed that the highest biodegradation rates for nitrate, sulphate, and iron reducing conditions were achieved at 2 mM (82.78%), 1 mM (81.52%), and 10 mM (91.65%), respectively. The results of this study demonstrate that OHRB in the Sungai Ular sediment can degrade 1,2-DCA under any redox condition but prefers a certain concentration. Keywords: Chlorinated compounds; Biodegradation; Organohalide Respiring Bacteria; Redox; 1,2-Dichloroethane Faculty of Chemical and Process Engineering Technology Dissertations Universities and colleges Dissertations Theses Dissertations https://umpir.ump.edu.my/id/eprint/47112 lcc PSM 0 0 lcc 0 0 10000 10000 2026-06-25 0 FTKKP .N35 2024 r Bc. T000004185 2026-06-25 12:25:33 2026-06-25 PSM 105043 105049