Trabelsi Keren, Meistelman Michael, Ciriminna Rosaria, Albo Yael, Pagliaro Mario
Department Chemical Engineering, The Center for Radical Reactions, Ariel University, Ariel 40700, Israel.
Istituto per lo Studio dei Materiali Nanostrutturati, CNR, 90146 Palermo, Italy.
Materials (Basel). 2020 Feb 12;13(4):827. doi: 10.3390/ma13040827.
An innovative catalyst is reported for removing suspect carcinogen trichloroacetic acid (TCA) found in water after chlorination. SilverSil, a methyl-modified silica xerogel doped with Ag nanoparticles, shows remarkably high and stable activity as heterogeneous catalyst for the reductive dehalogenation of TCA with NaBH as reducing agent. Chloroacetic acid and acetic acid are the main products of the highly reproducible reductive dehalogenation. The low cost, high stability and ease of application of the SilverSil sol-gel catalyst to continuous processes open the route to the industrial uptake of SilverSil to free chlorinated waters from a probable human carcinogenic agent exerting significant genotoxic and cytotoxic effects.
据报道，一种创新型催化剂可用于去除氯化后水中发现的可疑致癌物三氯乙酸（TCA）。SilverSil是一种掺杂银纳米颗粒的甲基改性二氧化硅干凝胶，作为以硼氢化钠为还原剂对TCA进行还原脱卤的多相催化剂，显示出极高且稳定的活性。氯乙酸和乙酸是这种具有高度可重复性的还原脱卤反应的主要产物。SilverSil溶胶-凝胶催化剂成本低、稳定性高且易于应用于连续工艺，为SilverSil在工业上的应用开辟了道路，从而使氯化水免受一种可能具有显著遗传毒性和细胞毒性的人类致癌物的污染。
