Accession Number ADA584318
Title Fate of Malathion in an Activated Sludge Municipal Wastewater Treatment System.
Publication Date Mar 2013
Media Count 55p
Personal Author E. B. Walters
Abstract Organophosphate compounds are used as pesticides and in chemical warfareagents such as nerve agents. VX ((O-ethyl S- 2-(diisopropylamino)ethyl) methylphosphonothioate) is one of the most toxic and environmentally persistent of these nerve agents. This research examined the fate of malathion, a pesticide and surrogate of VX O-ethyl S- 2-(diisopropylamino) (ethyl)(methylphosphonothioate), in bench-scale activated sludge (AS) sequencing batch reactors. Sorption kinetics and sorption equilibrium isotherm experiments indicate that sorption to AS biomass was not a statistically important removal mechanism. However, approximately 90% of the initial 4.25 mg L-1 malathion concentration degraded primarily via heterotrophic activity.
Keywords Activated sludge process
Biodegradation
Chemical warfare agents
Malathion
Nerve agents
Organophosphate chemical warfare agents
Organophosphates
Pesticides
Toxicity
Vx agent
Wastewater treatment systems


 
Source Agency Non Paid ADAS
NTIS Subject Category 57B - Biochemistry
99D - Basic & Synthetic Chemistry
74D - Chemical, Biological, & Radiological Warfare
68D - Water Pollution & Control
57P - Pest Control
Corporate Author Air Force Inst. of Tech., Wright-Patterson AFB, OH. Graduate School of Engineering and Management.
Document Type Thesis
Title Note Master's thesis.
NTIS Issue Number 1402
Contract Number N/A

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