Removal Efficiency Of Lindane From Water Onto Novel Hybrid Lipid Materials

Lots of pesticides were hydrophobic compounds, possess kind of toxicity and could be harm to organisms. Due to their hydrophobicity and stability, it seemed that it was fairly difficult to remove them from water. Due to pesticide excessive abusement, pesticide has come into food chain and cause air, soil, surface water, even ecosystem totally polluted. It was paying more and more attention by people that the application of them has threatened survival of human-beings and wildlife and that small amount of pesticides have caused series of severe consequences in public health, food quality and relative environment.Traditonal techniques, including aerobic process, precipitation and flocculation, only have removing efficiency on specific and easily degradable substances. Even these techniques could make the water qualified, they are not really effective in removing hydrophobic compounds. Active carbon has been proved as one of the most effective materials for removing hydrophobic compounds. However, the disadvantages of active carbon including poor regeneration, high costs, no selectivity limited its application. Therefore, one kind of innovative materials and techniques to treat hydrophobic compounds at low concentration and high toxicity was required. For this purpose, some novel materials have been development for hydrophobic compounds removing, including bagasse extracted from discarded materials.In this work, we invented one step reaction method to produce one kind of hybrid lipid to remove the hydrophobic compound-lindane. Firstly, IPTS as the silicaon resource and Dihexadecylamine as templates were useded for preparing novel hybrid lipid called as cerasomes by us. This noval nanoparticles were prepared by only one step. They were characterized by TEM, SEM and FT-IR. one kind of nanoparticle with diameter in the range of 200 to 300 nm was prepared. The diversity and stability of these articles were perfect. Secondly, the adsorption of lindane by cerasomes was studied by probe ultrasonography. The active carbon as common adsorbent was applied for comparision. was applied in analyzing the contents of lindane after adsorption were detected by GC-ECD. With changing the removal efficiency was studied at different pH, ionic strength and cerasomes'dose. It was proved that ionic strength has no effect on lindane adsorbancel. Thirdly, Cerasomes and active carbon were combined as novel adsorbent. The novel materials'properties have been studied. Cerasomes have much higher removal efficiency than active carbon. When the initial concentration of lindane is 4.00μg/L, the removal rate of lindane could be 85.18%. The result suggested that this kind of new complex adsorbent could be succeedly used in removing hydrophobic compounds.In summary, in this work in order to promote the absorption, cerasomes was combined with active carbon and microbial flocculant respectively. It was found that microbial flocculant could speeded sedimentation of cerasomes while active carbon help adsorption of lindane.