Rovani Suzimara, Santos Jonnatan J, Guilhen Sabine N, Corio Paola, Fungaro Denise A
Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP Av. Prof. Lineu Prestes, 2242 Cidade Universitária São Paulo SP CEP 05508-000 Brazil
Instituto de Química, Universidade de São Paulo Av. Prof. Lineu Prestes, 748 Cidade Universitária São Paulo SP CEP 05508-000 Brazil.
RSC Adv. 2020 Jul 23;10(46):27706-27712. doi: 10.1039/d0ra05198e. eCollection 2020 Jul 21.
Even with all the biological problems associated with bisphenol-A (BPA), this chemical is still being widely used, especially in thermal paper receipts. In this study, renewable mesoporous silica nanoparticles (MSN), obtained from sugarcane ash, functionalized with hexadecyltrimethylammonium (CTAB) were applied as an adsorbent in the removal of BPA from the aqueous solution. The versatility of this material and its BPA adsorption capacity were tested at different pH values, being practically constant at pH between 4 and 9, with a slight increase in pH 10 and a greater increase in pH 11. The removal time evaluation indicates a very fast adsorption process, removing almost 90% of BPA in the first 20 min of contact. The kinetic model indicates a monolayer formation of BPA molecules on the MSN-CTAB surface. The maximum adsorption capacity ( ) was 155.78 mg g, one of the highest found in literature, and the highest for material from a renewable source.
尽管双酚A（BPA）存在所有相关的生物学问题，但这种化学物质仍在广泛使用，尤其是在热敏纸收据中。在本研究中，由甘蔗灰获得的可再生介孔二氧化硅纳米颗粒（MSN），用十六烷基三甲基铵（CTAB）进行功能化，被用作从水溶液中去除双酚A的吸附剂。在不同pH值下测试了这种材料的多功能性及其对双酚A的吸附能力，在pH值为4至9之间时几乎保持恒定，在pH值为10时略有增加，在pH值为11时增加更大。去除时间评估表明吸附过程非常快，在接触的前20分钟内几乎去除了90%的双酚A。动力学模型表明双酚A分子在MSN-CTAB表面形成单层。最大吸附容量（ ）为155.78 mg/g，是文献中发现的最高值之一，也是来自可再生资源的材料中的最高值。
