Composite Model of Interracial Stepwise Ion/Coordination Particle Exchange-Electrostatic Exchange——Ionic Strength Effect on the Interaction Between Minor Metal Ion and Solid Particle in Seawater

It is the first time in experiment that we have found that the ionic strength effects on E(%)-pH curves of the systems with clay minerals as solid particles and those systems with hydrous oxides as solid particles, are "right-left shift phenomenon" and "left monodirectional shift phenomenon", respectively.The corresponding ionic strength effects on isotherms are "downward-upward shift phenomenon" and "upward monodirectional shift phenomenon", respectively.All the four phenomena are consistent with each other.In order to explain the above phenomena, the composite model of interracial ion/coordination particle exchange-electrostatic exchange is put forward to make a unified explanation and quantitative treatment.From the structures of the two kinds of materials——clay minerals and hydrous oxides, we know that the former has two kinds of exchange actions, i.e. when one increases,the other decreases, which makes the position of curves shift didirectionally,while the latter only has interfacial stepwise ion     

Ternary surface complexes by the E(%)-pH curve method

A new method for the study of ternary surface complexes at liquid-solid interface,the E(%)-pH curve method,was proposed.Four types of E(%)-pH curves,namely,phenomenon of left-right shifts of S-shaped curve,V-shaped curve,monodirection shift curve and X-shaped curve,were discovered.Correspondingly,apart fromtype (Ⅰ) ternary surface complex -S-O-M-L and type (Ⅱ) ternary surface complex -S-L-M,a newtype of ternary surface complex -S-O-L-M was discovered.     

海水中液-固界面三元络合物研究——E(%)-pH曲线法

提出用E(%)-pH曲线法研究液-固界面三元络合物的一种新方法 在实验中发现有4种E(%)-pH曲线,即:(1)S型曲线左-右摆动现象;(2)V型曲线;(3)单向移动的E(%)-pH曲线,(4)X型,曲线.相应的除(Ⅰ)类三元络合物Ⅰ和(Ⅱ)类三元络合物2之外,还发现“新类型”三元络合物3.     

微量元素铜与伊利石界面相互作用的离子强度效应

本文测定了在NaClO4和NaCl介质中离子强度对微量元素铜与伊利石相互作用的影响．所得结果为：（1）发现了新的实验现象，即离子强度效应致使交换率E（％）－pH曲线的先右后左摆动现象和离子强度效应导致等温线先下后上移动现象；（2）在NaCl介质中铜的交换率低于在NaClO4介质中的交换率，Cl－有络合效应;（3）各离子强度下的等温线均为等温线分类法中的L－F－4型，介质的离子强度不影响等温线的类型．     

Co(salen)/Nafion修饰电极对天然海水中一氧化氮的催化氧化及其测定

用Co(salen)/Nafion修饰铂电极对天然海水介质中的一氧化氮进行了测定,在最佳实验条件下,确定了Co(salen)/Nafion修饰电极的检出限是0.1 μmol/L,线性范围分别为0.1～1.0和1.0～9.9 μmol/L,相对标准偏差为0.24%,并且探讨了Co(salen)对NO的催化机理.