Grain analyzer, turbidimeter, Zeta potential instrument and microscope with Panansonic CCD are used to analyse the distribution of the bentonite grain, test the Zeta potential of bentonite and observe the structure of...Grain analyzer, turbidimeter, Zeta potential instrument and microscope with Panansonic CCD are used to analyse the distribution of the bentonite grain, test the Zeta potential of bentonite and observe the structure of floes. Through the comparison among chitosan, PAM, and aluminum salt, it can be inferred that the flocculation mechanism of chitosan is something like interpartical bridging of PAM rather than the electrical neutralization by prositive charge.展开更多
Bentonite is a kind of natural clay with good exchanging ability. By exchanging its interlamellar cations with various soluble cations, such as quaternary ammonium cations and inorganic metal ions, the properties of n...Bentonite is a kind of natural clay with good exchanging ability. By exchanging its interlamellar cations with various soluble cations, such as quaternary ammonium cations and inorganic metal ions, the properties of natural bentonite can be greatly improved. In this study, hexadecyltrimethylammonium bromide (HDTMA), CaCl2, MgCl2, FeCl3, AlCl3 were used as organic and inorganic pillared materials respectively to produce several kinds of Ca-, Mg-, Fe-, Al-organo pillared bentonites. Sorption of reactive red X-3B on them was studied to determine their potential application as sorbents in wastewater treatment. The results showed that these pillared bentonites had much improved sorption properties, and that the dye solutions’ pH value had some effect on the performance of these inorgano-organo pillared bentonites. Isotherms of reactive X-3B on these pillared bentonites sug-gested a Langmuir-type sorption mechanism.展开更多
文摘Grain analyzer, turbidimeter, Zeta potential instrument and microscope with Panansonic CCD are used to analyse the distribution of the bentonite grain, test the Zeta potential of bentonite and observe the structure of floes. Through the comparison among chitosan, PAM, and aluminum salt, it can be inferred that the flocculation mechanism of chitosan is something like interpartical bridging of PAM rather than the electrical neutralization by prositive charge.
基金Project supported by the Scientific Research Foundation for Re-turned Overseas Scholars and the National Natural Science Founda-tion of China (No. 40576080)
文摘Bentonite is a kind of natural clay with good exchanging ability. By exchanging its interlamellar cations with various soluble cations, such as quaternary ammonium cations and inorganic metal ions, the properties of natural bentonite can be greatly improved. In this study, hexadecyltrimethylammonium bromide (HDTMA), CaCl2, MgCl2, FeCl3, AlCl3 were used as organic and inorganic pillared materials respectively to produce several kinds of Ca-, Mg-, Fe-, Al-organo pillared bentonites. Sorption of reactive red X-3B on them was studied to determine their potential application as sorbents in wastewater treatment. The results showed that these pillared bentonites had much improved sorption properties, and that the dye solutions’ pH value had some effect on the performance of these inorgano-organo pillared bentonites. Isotherms of reactive X-3B on these pillared bentonites sug-gested a Langmuir-type sorption mechanism.
