Potential applications of oxidative enzymes and phenoloxidase-like compounds in wastewater and soil treatment: a review

Durán, Nélson; Espósito, Elisa

doi:10.1016/s0926-3373(00)00168-5

Cited by 817 publications

(388 citation statements)

References 158 publications

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“…POD was found to play a pivotal role in the oxidation of PAHs (Durán and Esposito, 2000). CAT can catalyze the degradation of azo dyes (Paar et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

In vitro biotransformation of PBDEs by root crude enzyme extracts: Potential role of nitrate reductase (NaR) and glutathione S-transferase (GST) in their debromination

et al. 2013

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h i g h l i g h t s" PBDEs could be debrominated and hydroxylated by the root crude enzyme extracts. " Debromination was the main degradation pathway. " In vitro and in vivo exposure to PBDEs produced the similar enzyme responses. " NaR and GST were the key enzymes in the plant degradation of PBDEs. a r t i c l e i n f o t r a c tIn order to investigate the enzyme transformation of PBDEs and to track the key enzymes involved in PBDE degradation in plants, in vivo exposure of plants of ryegrass, pumpkin and maize and in vitro exposure of their root crude enzyme extracts to PBDEs were conducted. Degradation of PBDEs in the root crude enzyme solutions fit well with the first order kinetics (R 2 = 0.52-0.97, P < 0.05), and higher PBDEs degraded faster than the lower ones. PBDEs could be transformed to lower brominated PBDEs and hydroxylated-PBDEs by the root crude enzyme extracts with debromination as the main pathway which contributed over 90% of PBDE depletion. In vitro and in vivo exposure to PBDEs produced similar responses in root enzyme activities of which the nitroreductase (NaR) and glutathione-transferase (GST) activities decreased significantly, while the peroxidase, catalase and cytochrome P-450 activities had no significant changes. Furthermore, higher enzyme concentrations of NaR and GST led to higher PBDE debromination rates, and the time-dependent activities of NaR and GST in the root crude enzyme extracts were similar to the trends of PBDE depletion. All these results suggest that NaR and GST were the key enzymes responsible for PBDE degradation. This conclusion was further confirmed by the in vitro debromination of PBDEs with the commercial pure NaR and GST.

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“…POD was found to play a pivotal role in the oxidation of PAHs (Durán and Esposito, 2000). CAT can catalyze the degradation of azo dyes (Paar et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

In vitro biotransformation of PBDEs by root crude enzyme extracts: Potential role of nitrate reductase (NaR) and glutathione S-transferase (GST) in their debromination

et al. 2013

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“…These microorganisms have been reported to degrade a wide range of xenobiotics by the action of their oxidative enzymes, e.g. manganese peroxidase, lignin peroxidase, versatile peroxidase or laccase (Durán and Esposito 2000;Kim and Nicell 2006).…”

Section: Introductionmentioning

confidence: 99%

Immobilisation of laccase on Eupergit supports and its application for the removal of endocrine disrupting chemicals in a packed-bed reactor

et al. 2011

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Laccase from Myceliophthora thermophila was covalently immobilised on Eupergit C and Eupergit C 250L yielding specific activities of up to 17 and 80 U/g, respectively. Due to its superior activity, Eupergit C 250L was chosen for further research. The somewhat lower catalytic efficiency (based on the ratio between the turnover number and the Michaelis constant, k cat /K M ) of the immobilised enzyme in comparison with that of the free enzyme was balanced by its increased stability and broader operational window related to temperature and pH. The feasibility of the immobilised laccase was tested by using a packed bed reactor (PBR) operating in consecutive cycles for the removal of Acid Green 27 dye as model substrate. High degrees of elimination were achieved (88, 79, 69 and 57% in 4 consecutive cycles), while the levels of adsorption on the support varied from 18 to 6%, proving that dye removal took place mainly due to the action of the enzyme. Finally, a continuous PBR with the solid biocatalyst was applied for the treatment of a solution containing the following endocrine disrupting chemicals: estrone (E1), 17b-estradiol (E2) and 17a-ethinylestradiol (EE2). At steady-state operation, E1 was degraded by 65% and E2 and EE2 were removed up to 80% and only limited adsorption of these compounds on the support, between 12 and 22%, was detected. In addition, a 79% decrease in estrogenic activity was detected in the effluent of the enzymatic reactor while only 14% was attained by inactivated laccase.

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“…This can lead to acute effects on exposed organisms due to the toxicity of the dyes; phytoplanktons form abnormal colouration and cause reduction in photosynthesis because of the absorbance of light that enters the water. [11,12] The presence of unnatural colours is aesthetically unpleasant and tends to be associated with contamination. Without an adequate treatment, these dyes will remain in the environment for an extended period of time.…”

Section: Introductionmentioning

confidence: 99%

Decolourisation of Direct Orange S dye by ultra sonication using iron oxide nanoparticles

Karthikeyeni

Vijayakumar

Vasanth

et al. 2013

Journal of Experimental Nanoscience

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Biosynthesised iron oxide nanoparticles (INPs) less than 100 nm were used to decolourise the textile dye, Direct Orange S by the process of ultra sonication. The parameters tested for the decolourisation of the Direct Orange S dye were the INP concentration (0.2-1g/l), pH (3-11) and H 2 O 2 concentration (2-8 ml/l). The rate of decolourisation process was performed by both stirrer and ultra sonicator method using the first-order kinetics ln(c/c 0 ). The percentage of dye removal for the optimum conditions such as INP, 1g/l (87.2%); pH, 9 (85.5%) and H 2 O 2 concentration 8 ml/l (86.5%) were observed. The Direct Orange S dye was degraded efficiently by sonolysis (60 min) than by the magnetic stirrer method (120 min). High-performance liquid chromatography results showed that the peak for Direct Orange S dye was not present when the dye sample was treated by either H 2 O 2 þ INP or INP alone. Use of biosynthesised iron NPs in Direct Orange S dye (azo dye) decolourisation by a simple non-toxic Fenton reaction is a safe and novel approach. Industrialisation of this technique will be an economical way to decolorise the textile dyes present in water systems.

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Potential applications of oxidative enzymes and phenoloxidase-like compounds in wastewater and soil treatment: a review

Cited by 817 publications

References 158 publications

In vitro biotransformation of PBDEs by root crude enzyme extracts: Potential role of nitrate reductase (NaR) and glutathione S-transferase (GST) in their debromination

In vitro biotransformation of PBDEs by root crude enzyme extracts: Potential role of nitrate reductase (NaR) and glutathione S-transferase (GST) in their debromination

Immobilisation of laccase on Eupergit supports and its application for the removal of endocrine disrupting chemicals in a packed-bed reactor

Decolourisation of Direct Orange S dye by ultra sonication using iron oxide nanoparticles

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