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A new technique for studying the adsorption kinetics of heavy metals, Pb2+ and Cu2+, on variable charge surfaces was established with two selective electrodes and microcomputer control system. Feasibility of the technique, including interference of other ions (mainly Fe3+ and Al3+), response time of electrodes, and the pH range of testing, was studied. Comparision with the most widely used miscible displacement technique, which was considered insufficient in studying 30-minute rapid reactions, at present time showed that the new technique was more advantageous in testing in situ, easy to operate, and economic.
A new technique for studying the adsorption kinetics of heavy metals, Pb2 + and Cu2 +, on variable charge surfaces was established with two selective electrodes and microcomputer control system. Feasibility of the technique, including interference of other ions (mainly Fe3 + and Al3 +), response time of electrodes, and the pH range of testing, was studied. Comparision with the most widely used miscible displacement technique, which was considered insufficient in studying 30-minute rapid reactions, at present time showed that the new technique was more advantageous in testing in situ easy to operate, and economic.