吸附
活性炭
亚甲蓝
刚果红
核化学
热解
卡西亚
水溶液
化学
傅里叶变换红外光谱
环境修复
碳纤维
材料科学
有机化学
化学工程
光催化
催化作用
复合材料
病理
中医药
工程类
替代医学
污染
复合数
生物
医学
生态学
作者
Nidchakarn Theamwong,Wimonsiri Intarabumrung,Suwiwat Sangon,Suphattra Aintharabunya,Yuvarat Ngernyen,Andrew J. Hunt,Nontipa Supanchaiyamat
标识
DOI:10.1016/j.biortech.2021.125832
摘要
Waste Cassia bakeriana seed pods were used for porous carbon production in a facile pyrolysis process. The carbons were highly efficient adsorbents for methylene blue, congo red and ciprofloxacin antibiotic from aqueous media. The experimental results demonstrated that despite moderate surface area of 283.4 m2/g, KOH activated carbon (PSAC-KOH) exhibited the highest adsorption capacity for congo red reported to date for carbon-based adsorbents (970 mg/g). PSAC-KOH also demonstrated a high adsorption capacity at 600 mg/g for ciprofloxacin. Raman spectroscopy, X-ray diffraction and X-ray Photoelectron spectroscopy analysis of the carbons demonstrated an extensive graphitic characteristic, while Fourier transform infrared spectra of PSAC-KOH suggested a high proportion of aromaticity which promotes adsorption mechanisms including electrostatic and π-π interactions. Pseudo-second-order kinetic model fitting suggested a rate-controlling chemisorption mechanism. The utilization of waste Cassia bakeriana seed pods for carbon production may create new opportunities to develop sustainable and highly efficient adsorbents for water remediation.
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