生物炭
化学
吸附
尿素
刚果红
吸附
化学吸附
朗缪尔
朗缪尔吸附模型
氮气
核化学
无机化学
有机化学
热解
作者
Zepeng Liu,Yueyao Hu,Jie Zhang,Ying Guan,Liping Zhang,Ping Ye,Tongtong Zhang,Xingyu Huang,Weixiao Meng,Hui Gao
标识
DOI:10.1016/j.biortech.2023.129783
摘要
Adsorbents with excellent physicochemical properties and green synthetic routes are desired for efficient removal of Congo red (CR) wastewater. Hence, a novel approach was proposed within this work. Biochar NCBC obtained from Medulla Tetrapanacis was synthesized through co-modification with urea/calcium chloride. NCBC exhibited an enormous surface area (750.09 m2/g) and a micro-mesoporous composite structure. Higher nitrogen content was detected on the surface of NCBC (8.17%) compared to that of urea directly modified biochar (4.63%). Nitrogen observed on the surface of NCBC was presented as graphitic N, pyrrolic N, amine N as well as pyridinic N. Kinetic and isothermal investigations revealed the active sites on NCBC to be homogeneous and bind to CR mainly by chemisorption. Calculated maximum sorption of CR on NCBC was 2512.82 mg/g basing on Langmuir model. Moreover, the practicality of NCBC was further proved by the cultivation of Nelumbo nucifera Gaertn. and Penicillium.
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