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The Nano-TiO₂/Diatomite compound photocatalyst is used to degrade rhodamine B dye wastewater in photochemical reactor. The test result indicates that the rate of photodegradation of rhodamine B is influenced by reactive conditions. The best technical conditions are concentration of rhodamine B solution 10mg/L, ultraviolet light 300W, the compound photocatalyst amount used 1g/L, the pH 5.8, reaction time 20min. Under these conditions the rate of photodegradation of rhodamine B may reach as high as 97.80%. And the efficiency of photodegradation of catalyst only has a little changed in recycling.

This study aims to determine the effectiveness of silver nanoparticles (Ag⁰-NPs) and silver oxide (Ag₂O) as antibacterial agents against E. coli bacteria in PLA/PBS-D matrix. In addition, 10% of diatomite (D) was added to be the absorbent for Ag⁰-NPs. Synthesis of composites PLA/PBS-10D-Ag⁰NPs-1% and PLA/PBS-10D-Ag₂O-1%-GPTS-3% was carried out where 3-glycidyloxypropyl-trimethoxysilane (GPTS) was used as the compatibilizer. The resulting composites were analyzed by IR, XRD, hardness, impact, tensile strength, and thermal properties. The antibacterial agent was obtained from Ag⁰-NPs, which impregnated into diatomite pores to form silver nanoparticle-diatomite (Ag⁰-NPsD). The XRD diffractograms showed peaks at 2$𝜃$ 16.64${}^{\circ }$, 33.01${}^{\circ }$, 38.1${}^{\circ }$, and 44.38${}^{\circ }$ for PLA-PBS, Ag₂O, and Ag⁰-NPs. Adding 10 phr of Ag⁰-NPsD, D and 3%-GPTS to the PLA-PBS system increased the hardness to 84.67 and 86.33, respectively. The impact strength of the composites increased significantly after the addition of 3% GPTS. The addition of Ag⁰-NPsD and 3%GPTS increased thermal properties of the composites. The antibacterial test results showed that the composite PLA/PBS-10D-Ag₂O-1%-GPTS-3% was not effective as an antibacterial agent. In contrast, PLA/PBS-10D-Ag⁰ NPs-1% showed the ability to inhibit the E. Coli bacterial growth up to 99%. In the PLA/PBS-D system, Ag⁰-NPs are more effective for inhibiting the E. Coli bacterial growth than Ag₂O.

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Natural diatomite, subjected to different modifications, is investigated for hydrogen adsorption capacities at room temperature. An effective metal-modified strategy is developed to disperse platinum (Pt) and palladium (Pd) nanoparticles on the surface of diatomite. Hydrogen adsorption capacity of pristine diatomite (diatomite) is 0.463 wt.% at 2.63 MPa and 298 K, among the highest of the known sorbents, while that of acid-thermally activated diatomite (A-diatomite) could reach up to 0.833 wt.% due to the appropriate pore properties by activation. By incorporation with a small amount of Pt and Pd (~0.5 wt.%), hydrogen adsorption capacities are enhanced to 0.696 wt.% and 0.980 wt.%, respectively, indicating that activated diatomite shows interesting application in the field of hydrogen storage at room temperature.

The effect of purifying phosphorus by diatomite and researching phosphorus removal theory of diatomite was focused in this paper. The paper includes the following main parts: experiment method and procedure, results and discussion and conclusion. The results indicated that the phosphorus removal rate of solution containing 2mg/L P was above 95% with 3.5g diatomite with pH being 3.0. The adsorption time was 20 minutes. The equilibrium equation of isothermal adsorption can be described with Freundlich equation. The diatomite is a proper removing phosphorus adsorbent dealing with the effluent from secondary biological treatment process. The phosphorus removal theory of diatomite is adsorption and surface complex reaction.

To study the adhesion of absorbent resin, sodium polyacrylate/ diatomite composite was prepared by the aqueous solution polymerization with the main materials acrylic acid and diatomite, crosslinking agent and initiator. FT-IR was used to analyze the molecular structure of composite resin and it was also discussed the effect of the factors such as the neutralization degree, monomer concentration, the amount of initiator, crosslinking agent and the diatomite on adhesion properties.