Biomimetic Fat Adsoluble Agent Preparation And Its Use For Removal Of Hydrophobic Organic Contaminants In Aqueous Solution

Organic chemicals, especially the hydrophobic organic chemicals (HOCs), in aquatic environment are considered to be toxic and hazardous to various organisms, including human being. These HOCs have been found to be very difficult to remove using conventional means such as aerobic process, sedimentation and coagulation, due to their chemical and biological stability.Large of literatures has been reported that the fat tissue of organism can accumulate HOCs and the accumulation level has the positive correlation with the quantity of fat. In this work, based on this characteristic, an innovative agent, i.e., biomimetic fat adsoluble agent (BFAA) with similar structure of fat cell-selectively permeable membrane selects chemicals to pass in and out and target chemicals are absorb by nucleolus, has been synthesized employing interfacial polymerization. This agent has found to have specifications of both absorption and dissolution, and thus named as "adsoluable agent" in this work. The main findings are described below.(1) BFAA was synthesized using interfacial polymerization, and found that the BFAA thus obtained has a hydrophobic nucleolus-triolein and hydrophilic membrane structure-polyamide from which the water carrying with the HOCs can pass into the interior, followed by the accumulation of the HOCs. Based on this fact and observations, a new word "adsolution" was coined, which means that the biomimetic fat adsoluble agent (BFAA) can act as both "absorption" and "dissolution" of the targeted chemicals in aqueous solution.(2) It is observed that 20 mg/L of both BFAA and PAC can reduce the lindane concentration from 10 μg/L to 0.1 μg/L (lindane maximum admissible concentration, MAC) in aqueous solution. Meanwhile, it is found that BFAA has higher removal ability for lindane than PAC, possibly due to the persistence HOCs bioaccumulation ability of the former. In the said lindane concentrations 5-40 μg/L, both BFAA and PAC expressed the fast removal characteristics followed first order reaction kinetics, and the intra-particle diffusion was proved to be the control step in the removal process. A linear partition equation can be used to describe lindane adsolution...