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2. 发明申请

US20130058724A1 NOVEL MULTIFUNCTIONAL MATERIALS FOR IN-SITU ENVIRONMENTAL REMEDIATION OF CHLORINATED HYDROCARBONS 审中-公开
标题翻译：新型多功能材料用于氯原子环境修复
公开(公告)号：US20130058724A1
公开(公告)日：2013-03-07
申请号：US13502047
申请日：2010-10-14
申请人： Vijay John , Noshir Pesika , Gerhard Piringer , Jingjing Zhan , Gary McPherson
发明人： Vijay John , Noshir Pesika , Gerhard Piringer , Jingjing Zhan , Gary McPherson
IPC分类号： B09C1/08 , C07C1/26 , C09K3/32 , B82Y30/00
CPC分类号： B09C1/08 , B09C1/002 , C02F1/283 , C02F1/288 , C02F2101/36 , C02F2103/06 , C02F2305/08
摘要： Effective in-situ injection technology for the remediation of dense nonaqueous phase liquids (DNAPLs) such as trichloroethylene (TCE) benefits from the use of decontamination agents that effectively migrate through the soil media, and react efficiently with both dissolved TCE and bulk TCE. A novel decontamination system contains highly uniform carbon microspheres preferably in the optimal size range for transport through the soil. The microspheres are preferably enveloped in a polyelectrolyte (such as carboxymethyl cellulose, CMC) to which preferably a bimetallic nanoparticle system of zerovalent iron and Pd is attached. The carbon serves as a strong adsorbent to TCE, while the bimetallic nanoparticles system provides the reactivity. The polyelectrolyte serves to stabilize the carbon microspheres in aqueous solution. The overall system resembles a colloidal micelle with a hydrophilic shell (the polyelectrolyte coating) and a hard hydrophobic core (carbon). In contact with bulk TCE, there is a sharp partitioning of the system to the TCE side of the interface due to the hydrophobicity of the core. These multifunctional systems appear to satisfy criteria related to remediation and are relatively inexpensive and made with potentially environmentally benign materials. An aerosol process is preferably used to produce zerovalent iron particles supported on carbon. A method of lubricating includes creating carbon microspheres produced from a monosaccharide or polysaccharide, the carbon microspheres having a diameter of 50 nm to 6 microns, coating the microspheres with a surface coating and using the carbon microspheres as a lubricant.
摘要翻译：使用三氯乙烯（TCE）等致密非水相液体（DNAPLs）进行有效的现场注射技术，有利于使用有效迁移通过土壤介质的去污剂，并与溶解的TCE和体积TCE有效反应。一种新颖的净化系统包含高度均匀的碳微球，其优选地在用于运输通过土壤的最佳尺寸范围内。微球优选包封在聚电解质（例如羧甲基纤维素，CMC）中，其中优选连接有零价铁和Pd的双金属纳米粒子体系。碳作为TCE的强吸附剂，而双金属纳米粒子体系提供反应性。聚电解质用于在水溶液中稳定碳微球。整个系统类似于具有亲水壳（聚电解质涂层）和硬疏水芯（碳）的胶体胶束。与散装TCE接触，由于芯的疏水性，系统与界面的TCE侧有明显的划分。这些多功能系统似乎满足与修复相关的标准，并且相对便宜，并且可能具有环境友好的材料。优选使用气溶胶工艺以产生负载在碳上的零价铁颗粒。润滑方法包括制备由单糖或多糖生产的碳微球，碳微球的直径为50nm至6微米，用表面涂层涂覆微球并使用碳微球作为润滑剂。

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