Membrane bioreactor treatment of commonly used organophosphate pesticides

Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
Avik J GhoshdastidarAnthony Z Tong

Abstract

Five pesticide formulations registered for use in Canada containing organophosphate-insecticide active ingredients azinphos-methyl, chlorpyrifos, diazinon, malathion and phorate were subjected to treatment by membrane bioreactor (MBR) technology. The target active ingredients were introduced to the MBR at ppm level concentrations. The biodegradation of these compounds was analyzed daily using selected ion monitoring gas chromatography-mass spectrometry (GC/MS-SIM) following extraction of the analytes using solid-phase extraction (SPE). Amounts measuring 83 % to 98 % of the target analytes were removed with steady-state concentrations being reached within 5 days of their introduction. The dissolved oxygen, temperature, pH, and total heterotrophic bacterial population were monitored daily to ensure optimal conditions for biodegradation. The quality of the effluent from the MBR was assessed daily through spectrophotometric methods. Measurements were conducted for the concentration of ammonia, nitrate, nitrite, total and reactive phosphorus, as well as the chemical oxygen demand (COD) of the effluent. This study demonstrated that the MBR technology is feasible and efficient for treatment of organophosphate pesticides without introd...Continue Reading

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Citations

Aug 8, 2014·Environmental Science and Pollution Research International·Avik J GhoshdastidarAnthony Z Tong
Feb 3, 2016·Journal of Basic Microbiology·Razia Alam GilaniHassan Javed Chaudhary
Jan 2, 2013·Bioprocess and Biosystems Engineering·F MoscosoM A Sanromán
Jan 31, 2013·Environmental Science and Pollution Research International·Avik J Ghoshdastidar, Anthony Z Tong
Feb 21, 2014·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Guy MechrezEster Segal
Sep 28, 2018·Environmental Science and Pollution Research International·Debarati MukherjeeSwachchha Majumdar

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