[Rapid determination of internal resistance in an electricigenic microorganism reaction system].

Internal resistance (R(int)) is an important parameter for kinetic studies on an electricigenic microorganism reaction system (EMRS). The traditional polarization curve measurement method is too laborious and tedious, usually leads to remarkable disturbance on system running. An improved method was put forward in this study, by decreasing the adjustment range of the external resistance value (R(ext)).

Performance of tetramethoxyphenyl porphyrin cobalt(II) (CoTMPP) based stainless steel cathode in the electricigenic permeable reactive barrier for groundwater organic contamination remediation.

An electricigenic permeable reactive barrier (EPRB) technology was brought forward for remediation of organic-contaminated groundwater, with a benefit that it overcame the limitations of electron acceptor addition in other groundwater remediation methods. To investigate performances of constructions and materials used in EPRB system, several kinds of reactors were designed and prepared in laboratory. Stainless steel wires, a kind of nontoxic, inexpensive and conductive material, were used as basic material of electrode.

[Detecting organophosphorus pesticide in water environment using an enzyme biosensor].

Based on a screen printed carbon electrode which contained a sensitive film prepared by crosslinking acetylcholine esterase (AChE) with glutaraldehyde on the surface of working electrode, an amperometric enzyme biosensor was taken on the determination of organophosphorus (OP) pesticide in water environment. Cyclic voltammetry was applied to assess the coherence of prepared screen printed electrodes. The results show that the variation is less than 10%.