磷酸活化甲壳素的一步热解用于头孢氨苄抗生素的高效吸附。
Single-step pyrolysis of phosphoric acid-activated chitin for efficient adsorption of cephalexin antibiotic.
机构信息
Department of Chemistry, Govt. Degree College, Anantnag 192102, Jammu & Kashmir, India.
Department of Chemical Engineering, Engineering College, Baghdad University, P.O. Box 47024, Aljadria, Baghdad, Iraq.
出版信息
Bioresour Technol. 2019 May;280:255-259. doi: 10.1016/j.biortech.2019.02.003. Epub 2019 Feb 2.
Cephalexin (CFX) antibiotic, a potent pharmaceutical water pollutant, was efficiently removed by activated carbon (AC) derived from a single-step pyrolysis of phosphoric acid-activated chitin. Experimental conditions such as temperature, CFX initial concentration, and solution pH were screened in batch adsorption. Phosphoric acid activation of chitin and subsequent pyrolysis tailored the Brunauer-Emmett-Teller surface area, total pore volume, and average pore diameter to 1199.02 m/g, 0.641 cm/g, and 21.37 Å, respectively. The Langmuir isotherm adequately described the equilibrium data for CFX adsorption on chitin-AC, with an R of 0.99 and a monolayer capacity of 245.19 mg/g at 50 °C. Chitin-AC showed higher adsorption capacity compared with other ACs derived from industrial and agricultural precursors. When activated by phosphoric acid, chitin-AC featured functional multi-sites for vast antibiotic adsorption treatment. Overall, chitin-AC could be a promising adsorbent for removal of CFX.
头孢氨苄（CFX）抗生素是一种强效的医药水污染物，通过一步磷酸化甲壳素热解得到的活性炭（AC）可以有效地去除。在批量吸附实验中筛选了实验条件，如温度、CFX 初始浓度和溶液 pH 值。甲壳素的磷酸化活化和随后的热解使 BET 表面积、总孔体积和平均孔径分别调整到 1199.02m/g、0.641cm/g 和 21.37Å。Langmuir 等温线充分描述了 CFX 在甲壳素-AC 上吸附的平衡数据，在 50°C 时 R 值为 0.99，单层容量为 245.19mg/g。与其他由工业和农业前体衍生的 AC 相比，甲壳素-AC 具有更高的吸附能力。当用磷酸活化时，甲壳素-AC 具有用于大量抗生素吸附处理的多功能位。总的来说，甲壳素-AC 可能是一种很有前途的 CFX 去除吸附剂。
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