Abstract
In this study di-2-ethylhexyl phthalate (DEHP)-degradation strain CQ0110Y was isolated from activated sludge. According to the biophysical/biochemical characteristics and analysis of 16S rDNA, the strain was identified as Microbacterium sp. The results of this study showed the optimal pH value and optimal temperature which influenced the degradation rate in wastewater: pH 6.5–7.5, 25–35°C. Kinetics of degradation reaction had been performed at different initial concentrations and different time. Analyzed with SPSS10.0 software, the DEHP degradation can be described as the same exponential model when the initial DEHP concentration was lower than 1,350 mg/l. The kinetics equation was ln C = −0.4087t + A, with the degradation half life of DEHP in wastewater (1.59 days). To the best of our knowledge, this is the first reported case of DEHP degradation by Microbacterium sp. strain.
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References
ATSDR (2002) Toxicological profile for di(2-ethylhexyl)phthalate (DEHP). Agency for Toxic Substances and Disease Registry. http://www.atsdr.cdc.gov/toxprofiles/tp9.html Cited 26 July 2004
Cheng HF, Chen SY, Lin JG (2001) Hazardous organic matters in municipal sewage sludge in Taiwan. Water Sci Technol 10:65–70
Clausen PA, Hansen V, Gunnarsen L, Afshari A, Wolkoff P (2004) Emission of di-2-ethylhexyl phthalate from PVC flooring into air and uptake in dust: emission and sorption experiments in FLEC and CLIMPAQ. Environ Sci Technol 9:2531–2537
Gray LE, Barlow NJ, Furr JR, Brock J, Silva MJ, Barr DB, Ostby JS (2003) Transgenerational effects of di(2-ethylhexyl) phthalate in the male rat. Toxicol Sci 72:283
Gray LE, Furr J, Lambright C, Ostby J (2004) Chronic exposure to diethyl hexyl phthalate (DEHP) delays puberty and reduces androgen-dependent tissue weights in the male rat. Biol Reprod 113:166 (meeting abstract)
Haysish O (1957) Studies on oxygenases. J Biol Chem 229:905–920
Hu XY, Wen B, Shan XQ (2003) Survey of phthalate pollution in arable soils in China. J Environ Monit 4:649–653
Huff JE, Kluwe WM (1984) Phthalate esters carcinogenicity in F344/N rates and B6C3 F mice. Prog Clin Biol Res 141:137–154
International Programme on Chemical Safety (IPCS) (1992) Environmental Health Criteria 131. Diethylhexyl phthalate. World Health Organization, Geneva
Jobling S, Reynolds T, White R, Parker MG, Sumper JP (1995) A variety of environmentally persistent chemicals, including some phthalate plasticizers, are weakly estrogenic. Environ Health Perspect 103:582–587
Kampe W, Zurcher C, Jobst H (1988) Harmful organic substances in soils and plants after intensive sewage sludge applications. VDLUFA-Schriftenreihe 23:507–532
Kavlock R, Boekelheide K, Chapin R, Cunningham M, Faustman E, Foster P, Golub M, Henderson R, Hinberg I, Little R, Seed J, Shea K, Tabacova S, Tyl R,Williams P, Zacharewski T (2002) NTP Center for the Evaluation of Risks to Human Reproduction: phthalates expert panel report on the reproductive and developmental toxicity of di(2-ethylhexyl) phthalate. Reprod Toxicol 16:529–653
Kim YH, Lee J, Moon SH (2003) Degradation of an endocrine disrupting chemical, DEHP[di-(2-ethylhexyl)-phthalate], by Fusarium oxysporum f. sp. pisi cutinase. Appl Microbiol Biotechnol 63:75–80
Koch HM, Drexler H, Angerer J (2004) Internal exposure of nursery-school children and their parents and teachers to di(2-ethylhexyl)phthalate (DEHP). Int J Hyg Environ Health 1:15–22
Krieg NR, Holt JG (1984) Bergey’s manual of systematic bacteriology. Williams & Wilkins, Baltimore
Kumar S, Tamura K, Nei M (2004) MEGA3: integrated software for molecular evolutionary genetics analysis and sequence alignment. Brief Bioinform 5:150–163
Meng PR, Wang XK, Xu GT (1996) Determination and distribution of phthalate alkyl esters in soil in Jinan. Environ Chem 15:427–432
Microbiology Institute Of CAS (China Academy of Sciences) (1978) Identification manual of systematic bacteriology. Science Publication, Beijing
O’Grady DP, Howard PH, Warner AF (1985) Activated sludge biodegradation of 12 commercial phthalate-esters. Appl Environ Microbiol 49:443–445
Pang JM, Duan YL, Chi BL (1995) Residue and toxicity of DEHP in the soil and chinise cabbage. Environ Chem 14:239–242
Psillakis E, Mantzavinos D, Kalogerakis N (2004) Monitoring the sonochemical degradation of phthalate esters in water using solid-phase microextraction. Chemosphere 54:849–857
Qiu Z, Shu W, Tian H (2003) An analysis of the organic extracts from source water and drinking water in city C and the effects on DNA damage in primary hepatocytes in rats. Acad Med Militaris Tertiae 5:423–426
Quan CS, Liu Q, Tian WJ, Kikuchi J, Fan SD (2005) Biodegradation of an endocrine-disrupting chemical, di-2-ethylhexyl phthalate, by Bacillus subtilis No. 66. Appl Microbiol Biotechnol 66:702–710
Sala-Trepat JM, Evams WC (1971) The meta cleavage of catechol by azobacter species. Eur J Chem 20:400–413
Sanakis Y, Mamma D, Christakopoulos P, Stamatis H (2003) Catechol 1,2-dioxygenase from Pseudomonas putida in organic media—an electron paramagnetic resonance study. Int J Biol Macromol 33:101–106
Strachan PD, Freer AA, Feson CA (1998) Purification and characterization of catechol,2-dioxygenase from Rhodococcus rhodochrous NCIMB 13259 and cloning and sequencing of its catA gene. Biochemistry 333:741–747
Suzuki T, Yaguchi K, Suzuki S, Suga T (2001) Monitoring of phthalic acid monoesters in river water by solid-phase extraction and GC-MS determination. Environ Sci Technol 18:3757–3763
Tao S, Deng BS, Hermosin B, Saiz-Jimenez C (1993) Identification of organic pollutants in agricultural soils from Tianjin, China. Fresenius Environ Bull 11:677–682
Tian H, Shu W, Qiu Z, Chen Ji-an, Zhao Q (2004) Primary study of estrogenic pollutants in drinking water in a city on the Yangtze Rive. Acad Med Militaris Tertiae 19:1751–1754
Wang JL, Liu P, Qian Y (1995) Microbial degradation of di-n-butyl phthalate. Chemosphere 31:4051–4056
Wang JL, Liu P, Shi H, Qian Y (1997) Kinetics of phthalic acid ester degradation by acclimated activated sludge. Process Biochem 32:567–571
Wolf NL, Burns LA, Steen WC (1980) Phthalate ester hydrolysis: linear free energy relationship. Chemosphere 9:939–942
Wu SP, Tao S, Xu FL, Dawson R, Lan T, Li BG, Cao J (2005) Polycyclic aromatic hydrocarbons in dustfall in Tianjin, China. Sci Total Environ 345:115–126
Zeng F, FU JM, Sheng GY (1999) Study progress on biodegradation of PAEs organic pollutants. Prog Environ Sci 7(4):1–13
Acknowledgement
This work was supported by the National Natural Science Foundation of China (grant no. 50408027), the Youth Foundation of Sichuan Province Education Department of China (grant no. 2004B004), and the Key Project of Ministry of Science and Technology of China (grant no. 2003BA869C and no. 2003BA903B03-02). We thank Mr. Xuekui Zhang of Chongqing Municipal Center of Disease Control and Prevention for helping detect the degradation products of DEHP.
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Xiang Li and Ji-an Chen contributed equally to this work.
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Chen, Ja., Li, X., Li, J. et al. Degradation of environmental endocrine disruptor di-2-ethylhexyl phthalate by a newly discovered bacterium, Microbacterium sp. strain CQ0110Y. Appl Microbiol Biotechnol 74, 676–682 (2007). https://doi.org/10.1007/s00253-006-0700-3
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DOI: https://doi.org/10.1007/s00253-006-0700-3