Laboratory of Advanced Materials Chemistry, Institute for Advanced Study in Technology, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
Int J Phytoremediation. 2024;26(14):2313-2324. doi: 10.1080/15226514.2024.2389471. Epub 2024 Aug 18.
The peel of was employed in the preparation of biochar and firstly applied for tetracycline removal from aqueous solution. Based on different characterization techniques, the material was found to possess a variety of surface functional groups on a porous structure and a pH point of zero charge (pH) of 9.3. Adsorption of tetracycline (TC) was conducted under varying conditions, revealing significant effects of carbonization temperature, solution pH, adsorbent dose, ionic strength, contact time and initial concentration of TC on the biochar adsorption capacity. Kinetic data on TC adsorption were best described using the Elovich kinetic model, with an initial adsorption rate of 167.3 mg gmin. Isotherm data on adsorption of the desired biochar showed the best fit with the Temkin isotherm model, followed by the Langmuir model, displaying maximum adsorption capacity at 12.4 mg g. The electrostatic interactions between the charged biochar surfaces and certain fractions of TC were proposed as the major mechanism, together with H-bonding, pore-filling effect and π-π interaction. This study demonstrates great potential of peel as a starting material to prepare an effective and reusable adsorbent in the removal of TC.
采用 果皮制备生物炭，并首次将其应用于从水溶液中去除四环素。基于不同的表征技术，发现该材料在多孔结构上具有多种表面官能团，零电荷点（pH）为 9.3。在不同条件下进行了四环素（TC）的吸附实验，结果表明碳化温度、溶液 pH 值、吸附剂用量、离子强度、接触时间和 TC 的初始浓度对生物炭吸附能力有显著影响。TC 吸附的动力学数据最符合 Elovich 动力学模型，初始吸附速率为 167.3mg gmin。吸附等温线数据最符合 Temkin 等温线模型，其次是 Langmuir 模型，在 12.4mg g 时表现出最大吸附容量。带电荷的生物炭表面与 TC 的某些部分之间的静电相互作用被认为是主要机制，此外还有氢键、孔填充效应和π-π相互作用。本研究表明， 果皮作为一种起始材料，具有很大的潜力，可用于制备去除 TC 的有效且可重复使用的吸附剂。
