摘要
用SAXS方法验证了海洋化学液-固界面研究中一些混合交换剂体系的分维分别具有加和性和非加性规律。实验测得:针铁矿/蒙脱石、水锰矿/无定形氧化铁、δ-MnO_2/针铁矿、δ-MnO_2/无定形氧化铁等混合交换剂体系的表面分维对混合百分率具有线性加和性;而高岭石/无定形氧化铁、无定形氧化铁/蒙脱石、δ-MnO_2/蒙脱石、δ-MnO_2/氧化铁凝胶等混和交换剂具有非线性加和性。上述诸体系在海水介质中平衡一年后,SAXS测定的表面分维皆具有非线性加和性,或非线的程度有所增加。
1. Study of the linear additivity and non-linear additivity for the exchange of Zn(Ⅱ) on mixtures of various clay minerals and hydrous metal oxides by using the solid-liquid distribution coefficients (D)-weight percentage(%) graphic method showed that when clay minerals, hydrous metal oxides etc., solid particles are mixed, the 'D-weight percentage(%) graph' of the mixed exchanger system is characterized by linear additivity. After long time pre-equili-brium in seawater for the mixture of α-FeOOH-montmorillonite, the distribution coefficients for Zn(Ⅱ) distribution between the exchanger mixture and salution were lower than that predicted from the case of linear additivity--non linear additivity (rule Ⅰ). However, the distribution coefficient of the γ-AlOOH-Montmorillonite mixed exchanger system is just opposite, higher than predicted from the case of linear additivity rule--non-linear additivity (rule Ⅱ).2. The linear additivity and non-linear ad ditivity for the surface fractal dimension of mixed exchanger systems are confirmed with the SAXS method (see Table 1).(1) The linear additivity of some mixed exchanger systems e.g. α-FeOOH/Montm., Man-ganite/amorphous ferric oxide, α-FeOOH/6-MnO2, etc. can be obtained from SAXS experimental data.(2) The non-linear additivity for the surface fractal dimensions of some mixed exchanger systems e. g. Kaolinite/amorphous ferric oxide, δ-MnO2/Montm., amorphous ferric oxide/ Montm., δ-MnO2/ferric oxide gel. etc. can be obtained by the D-weight percentage(%) graphic method.(3) The non-linear additivity for the surface fractal dimensions of some mixed exchange systems after long time pre-equilibrium in seawater are as follows: Kaolinite/amorphous ferricoxide, Montm/α-FeOOH, δ-MnO2/amorphous ferric oxide, amorphous ferric oxide/Montm , etc.Results by the surface fractal dimension (D)-weight percentage(%) graphic method and the solid-liquid distribution coefficients (D)-weight percentage(%) graphic method coincide obviously.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1992年第6期581-590,共10页
Oceanologia Et Limnologia Sinica
基金
国家自然科学基金 4917627l号
关键词
海洋
液-固界面
分形
混合交换剂
Liquid-solid interface in ocean, Surface fractal dimension of mixed exchanger system, Linear addidvity.
