Biodegradation of diethyl-phthalate (DEP) by halotolerant bacteria isolated from an estuarine environment

Autor(es)

Perpetuo, Elen Aquino ^{[1, 2, 3]} ; da Silva, Esther Cecilia Nunes ^[1] ; Karolski, Bruno ^[2] ; do Nascimento, Claudio Augusto Oller ^{[2, 4]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Interunits Grad Program Biotechnol, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Environm Res & Educ Ctr, CEPEMA POLI USP, Rod Conego Domenico Rangoni, 270 Km, Cubatao, SP - Brazil

^[3] Univ Fed Sao Paulo, Inst Marine Sci, IMar UNIFESP, Ave Carvalho de Mendonca 144, Santos, SP - Brazil

^[4] Univ Sao Paulo, Dept Chem Engn, POLI USP, Ave Lineu Prestes 580, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIODEGRADATION; v. 31, n. 4-6, p. 331-340, DEC 2020.
• Citações Web of Science: 1

Resumo

Phthalates are widely used as plasticizers in many industrial products due to their chemical properties that confer flexibility and durability to building materials, lubricants, solvents, insect repellents, clothing, cosmetics, being widely distributed in the environment. Besides persistent, they are also considered endocrine-disrupting compounds (EDCs), causing a global concern about their release into the environment, once they can alter the reproductive and endocrine health of humans systems. Under natural conditions, photodegradation and hydrolysis rates of phthalates are often very slow; therefore, microbial degradation is a natural way to treat these pollutants. In this context, three bacterial consortia (CMS, GMS and GMSS) were isolated from environmental samples from the Santos Estuarine System (SES) and were able to grow on diethyl-phthalate (DEP) as an only carbon source. From the GMSS consortium, three different strains were isolated and identified asBurkholderia cepacia,Pseudomonas koreensisandRalstonia pickettiiby molecular and mass spectrometry (MALDI-TOF-Biotyper) techniques. Considering there are no reports about Ralstonia genus on phthalates degradation, this strain was chosen to proceed the kinetics experiments.Ralstonia pickettiirevealed a great ability to degrade DEP (300 mg/L) in less than 24 h. This is the first report implicatingR. pickettiiin DEP degradation. (AU)

• Processo FAPESP: 17/10720-1 - Otimização das condições de biodegradação do ftalato por bactérias isoladas de ambiente marinho
• Beneficiário: Esther Cecilia Nunes da Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica