Abstract:
:Tricresyl phosphates (TCPs), a typical sort of organophosphate flame retardants, has received extensive concerns due to its potential adverse effects. However, limited information is available on the efficient and safe removal methods of TCPs. In this regard, TCPs were tentatively biodegraded with Brevibacillus brevis. A probable degradation pathway was further proposed with the cellular reactions discussed in detail. Experiments showed that B. brevis at 2 g L-1 could degrade 1 mg L-1 tri-m-cresyl phosphate, tri-p-cresyl phosphate, and tri-o-cresyl phosphate by 82.91%, 93.91%, and 53.92%, respectively, within five days. In the process of biodegradation, B. brevis metabolism caused the release of Na+ and Cl- as well as the absorption of some nutrient ions including K+, PO43-, Mg2+, and SO42-; the presence of oxalic acid, citric acid, acetic acid, and malonic acid was also detected. Similar metabolic pathways were found among different TCPs isomers, but tri-o-cresyl phosphate induced more reactive oxygen species than the other two did. This work develops novel insights into the potential mechanisms of TCPs biodegradation by microorganisms.
journal_name
Chemospherejournal_title
Chemosphereauthors
Liu Y,Yin H,Wei K,Peng H,Lu G,Dang Zdoi
10.1016/j.chemosphere.2019.05.188subject
Has Abstractpub_date
2019-10-01 00:00:00pages
195-203eissn
0045-6535issn
1879-1298pii
S0045-6535(19)31103-8journal_volume
232pub_type
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