Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
China-UK Water and Soil Resources Sustainable Utilization Joint Research Centre, Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China.
Bioresour Technol. 2023 Aug;381:129119. doi: 10.1016/j.biortech.2023.129119. Epub 2023 May 2.
Tetracycline (TC) and sugarcane bagasse had both exerted enormous strain on environmental security. In this work, new composite adsorbent designed by impregnating bio-waste bagasse with magnesium-aluminum layered double oxides (BC-MA) was innovatively brought forward for TC removal. Benefiting from the abundant adsorption sites supplied by developed pores structure (0.308 cm·g), enlarged surface area (256.8 m·g) and reinforced functional groups, the maximum adsorption amount of BC-MA for TC reached 250.6 mg g. Moreover, BC-MA displayed desirable adsorption capacity in diverse water environments coupled with excellent sustainable regeneration ability. The absorption process of TC by BC-MA was spontaneous and endothermic, and the pivotal rate-limiting stage pertained to intraparticle diffusion. The mechanisms proposed here mainly concerned π-π interactions, pore filling, complexation and hydrogen bonding. These findings suggested that the synthesis of modified biochar from bagasse would offer new opportunities for simultaneous waste resource reuse and water pollution control.
四环素（TC）和甘蔗渣都对环境安全造成了巨大的压力。在这项工作中，创新性地提出了一种新的复合吸附剂，即用镁铝层状双氢氧化物（BC-MA）浸渍生物废料甘蔗渣来去除 TC。得益于发达的孔结构（0.308 cm·g）、增大的表面积（256.8 m·g）和增强的功能基团提供的丰富吸附位点，BC-MA 对 TC 的最大吸附量达到 250.6 mg·g。此外，BC-MA 在不同的水环境中表现出良好的吸附能力，并且具有出色的可持续再生能力。BC-MA 对 TC 的吸附过程是自发和吸热的，关键的速率限制阶段与颗粒内扩散有关。这里提出的机制主要涉及π-π 相互作用、孔填充、络合和氢键。这些发现表明，从甘蔗渣中合成改性生物炭将为同时利用废物资源和控制水污染提供新的机会。
