AUB ScholarWorks

Effect of Butylated Hydroxytoluene (BHT) on the aerobic biodegradation of a model vegetable oil in aquatic media

Show simple item record Salam, Darine.A Suidan, M.T Venosa, A.D 2022-10-14T12:07:38Z 2022-10-14T12:07:38Z 2012
dc.identifier.citation Tiantian Yang, Peng Xiao, Jinming Zhang, Ruonan Jia, Haq Nawaz, Zhangyan Chen, Jun Zhang. Multifunctional Cellulose Ester Containing Hindered Phenol Groups with Free-Radical-Scavenging and UV-Resistant Activities. ACS Applied Materials & Interfaces 2019, 11 (4) , 4302-4310.
dc.description.abstract Antioxidants added to vegetable oils to prevent lipid oxidation significantly affect their biodegradation in impacted aquatic environments. In this study, the effect of butylated-hydroxytoluene (BHT) on the biodegradation of glyceryl trilinoleate, a model vegetable oil highly susceptible to autoxidation, was determined. Biodegradation experiments were conducted in respirometric microcosms at an oil loading of 333 gal acre -1 (0.31 L m -2) and BHT concentrations ranging from 0 to 800 mg kg -1 (0, 50, 100, 200, 400, and 800 mg kg -1). Competition between polymerization and biodegradation of the oil was observed at all BHT concentrations and was significant in the microcosms not supplemented with the antioxidant. In all microcosms, intractable rigid polymers unavailable for bacterial degradation were formed. Infrared analysis evidenced the advanced stages of the oil autoxidation. After 19 weeks of incubation, only about 41% of the oil was mineralized in the microcosms with no BHT. However, mineralization exceeded 67% in the microcosms with added antioxidant and did not significantly increase with increasing BHT concentrations. Biodegradation rate constants were calculated by nonlinear regression and were not significantly different in the microcosms with added BHT (k = 0.001 h -1). Higher k values were measured in the microcosms lacking the antioxidant (k = 0.0023 h -1), most likely due to the increased oxygen consumption associated with the autoxidation process in this case. No toxicity was detected in all biotic microcosms at the end of the incubation period, while high toxicity (EC 50 = 4.78%) was measured in the abiotic blanks with no antioxidant and was attributed to the accumulation of autoxidation products. (Figure Presented). © 2012 American Chemical Society.
dc.language.iso en
dc.publisher American Chemical Society
dc.title Effect of Butylated Hydroxytoluene (BHT) on the aerobic biodegradation of a model vegetable oil in aquatic media
dc.type Article

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search AUB ScholarWorks


My Account