在粘土矿物膜层中的移动性.pdf

用粘粒修飾電極探討巴拉)(Jj 在粘土礦物膜層中的移動性 陳鴻基李國欽莊作權1 J. , G. C. LL and T. C. JUANG. 1995. Study on the Mobility ofParaquat in the with the Clay Modified Electrode. Weed Science Bulletin 16: 1-13. of paraquat in the films of clay minerals was studied with the techniques of chemistry. The results indicated that the order of peak current of cathod (ipc) clay modified electrodes was as follows : vermiculite ferruginous smectite bentonite kaolinite. Amounts of cathodic peak current determined electrode were affected by the layer charges of clay minerals. The mobility of of vermiculite was more than that of montmorillonite. It was a linear slope(ipc vs.ν 1/2) and ipc of all standard clay minerals modified fact indicated that i determined with clay modified electrodes were controlled pc rate of paraquat ions to the surface of electrode. The rate of paraquat diffused of clays to surface of electrode was found the fastest with vermiculite, and the The results also indicated that the more the permanent negative charges of the more the irreversibility of cyclic voltammogram . Neverthless; the had a abundant 2 / Fe + 3+ in the octahedral layer.The changes between played a role of delivering electron, therefore the reversibility of ferruginous largest among the 2: 1 clay minerals.The variable charges offerruginous smectite on the adsorption of paraquat . The effects of variable charges of illite on the were more than that of vermiculite. The higher the pH , the more irreversi- of paraquat through the films of illite was shown. Paraquat , clay minerals , clay modified electrode. TAO :本文利用電分析化