CAS Key Laboratory of Magnetic Materials and Devices, Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, & Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, No.1219 Zhongguan West Road, Zhenhai District, Ningbo, Zhejiang 315201, PR China; CAS Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources & Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, 18 Xinning Road, Xining, Qinghai 810008, PR China; University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, PR China.
CAS Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources & Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, 18 Xinning Road, Xining, Qinghai 810008, PR China; University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, PR China.
J Hazard Mater. 2018 Sep 15;358:10-19. doi: 10.1016/j.jhazmat.2018.06.040. Epub 2018 Jun 19.
This research reports an innovative boron adsorbent of CA@KH-550@EPH@NMDG (CKEN) via the modification of N-methyl-d-glucosamine (NMDG) on the surface of biomass carbonaceous aerogel, which is environmentally friendly, economically inexpensive, has simple preparation process and good regenerability. SEM and FT-IR characterization results indicate that CKEN has a 3D cross-staggered structure with lots of hydroxyl groups and pore structure, which are beneficial to the diffusion of boron and the chelation interaction between boron and CKEN. The adsorption behavior of CKEN for boron was evaluated. Various parameters affecting adsorption properties, viz., pH, ionic strength, initial concentration of boron, temperature and contact time were investigated. The adsorption kinetics is fitted with pseudo-second-order kinetics model better and the adsorption of boron on CKEN is an exothermic process. The adsorption equilibrium reached within 15 h with the maximum adsorption amount of 1.42 mmol/g (298 K). Moreover, CKEN also showed excellent reusability by consecutive five cycles of adsorption-desorption. It can be used as a potential recyclable adsorbent for efficient enrichment of boron from aqueous solution.
本研究通过在生物质碳气凝胶表面修饰 N-甲基-D-葡萄糖胺（NMDG），制备了一种新型硼吸附剂 CA@KH-550@EPH@NMDG（CKEN）。该吸附剂具有环保、经济、制备工艺简单、可再生性好等优点。SEM 和 FT-IR 表征结果表明，CKEN 具有 3D 交错结构，含有大量的羟基和孔结构，有利于硼的扩散和硼与 CKEN 之间的螯合相互作用。研究了 CKEN 对硼的吸附行为，考察了影响吸附性能的各种参数，如 pH 值、离子强度、硼的初始浓度、温度和接触时间。吸附动力学更符合准二级动力学模型，硼在 CKEN 上的吸附是一个放热过程。吸附平衡在 15 小时内达到，最大吸附量为 1.42mmol/g（298K）。此外，CKEN 在连续 5 次吸附-解吸循环中表现出良好的可重复使用性，可作为一种潜在的可回收吸附剂，用于从水溶液中高效富集硼。
