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首页> 外文会议>IEEE(Institute of Electrical and Electronics Engineers) International Frequency Control Symposium and Exhibition; 20050829-31; Vancouver(CA) >Adsorption studies with environmental significance using an acoustic wave sensor
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Adsorption studies with environmental significance using an acoustic wave sensor

机译：使用声波传感器进行具有环境意义的吸附研究

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摘要

The adsorption of copper and lead on MnO_2 was followed by monitoring the frequency of piezoelectric crystal coated with MnO_2 in contact with solutions of the metal under study, at controlled temperature. Each isotherm was constructed for concentrations of each metal between 1 and 58 mg L~(-1). When absorption data for copper or lead were fitted to the Langmuir isotherm, two linear zones were obtained, the first one corresponding to data from 1 to 32 mg L~(-1) and the second one from 34 to 58 mg L~(-1). Each one of the linear zones corresponded to different adsorption sites, the first one to easily binding sites and the second one to more energetic sites, which begin to be occupied after the saturation of the first ones. The number of more favorable adsorption sites was higher than the number of the less favorable ones.
机译：在受控温度下，通过监测与研究中的金属溶液接触的MnO_2包覆的压电晶体的频率，跟踪铜和铅在MnO_2上的吸附。构造了每种等温线，每种金属的浓度在1至58 mg L〜（-1）之间。将铜或铅的吸收数据拟合到Langmuir等温线后，获得两个线性区域，第一个区域对应于1到32 mg L〜（-1）的数据，第二个区域对应34到58 mg L〜（- 1）。每个线性区域对应于不同的吸附位点，第一个线性区易于结合位点，第二个线性区至更多的高能位点，第一个饱和区开始被占据。较有利的吸附位点的数目高于较不有利的吸附位点的数目。

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