title: Catechol determination in compost bioremediation using a laccase sensor and artificial neural networks.
abstract: An electrochemical biosensor based on the immobilization of laccase on magnetic core-shell (Fe(3)O(4)-SiO(2)) nanoparticles was combined with artificial neural networks (ANNs) for the determination of catechol concentration in compost bioremediation of municipal solid waste. The immobilization matrix provided a good microenvironment for retaining laccase bioactivity, and the combination with ANNs offered a good chemometric tool for data analysis in respect to the dynamic, nonlinear, and uncertain characteristics of the complex composting system. Catechol concentrations in compost samples were determined by using both the laccase sensor and HPLC for calibration. The detection range varied from 7.5 × 10(-7) to 4.4 × 10(-4) M, and the amperometric response current reached 95% of the steady-state current within about 70 s. The performance of the ANN model was compared with the linear regression model in respect to simulation accuracy, adaptability to uncertainty, etc. All the results showed that the combination of amperometric enzyme sensor and artificial neural networks was a rapid, sensitive, and robust method in the quantitative study of the composting system.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China. etanglin@126.com
authors.forename: Lin
authors.initials: L
authors.lastname: Tang
authors.forename: Guangming
authors.initials: G
authors.lastname: Zeng
authors.forename: Jianxiao
authors.initials: J
authors.lastname: Liu
authors.forename: Xiangmin
authors.initials: X
authors.lastname: Xu
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Guoli
authors.initials: G
authors.lastname: Shen
authors.forename: Yuanping
authors.initials: Y
authors.lastname: Li
authors.forename: Can
authors.initials: C
authors.lastname: Liu
mesh_terms: D001673:Biodegradation, Environmental; D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods*; D002244:Carbon / Q000737:chemistry; D002396:Catechols / Q000032:analysis*; D004563:Electrochemistry; D004566:Electrodes; D004800:Enzymes, Immobilized / Q000378:metabolism; D042845:Laccase / Q000378:metabolism*; D053768:Metal Nanoparticles / Q000737:chemistry; D016571:Neural Networks, Computer; D012822:Silicon Dioxide; D012987:Soil / Q000032:analysis
chemical_list: D002396:Catechols; D004800:Enzymes, Immobilized; D012987:Soil; D002244:Carbon; D012822:Silicon Dioxide; D042845:Laccase; C034221:catechol