吸附
化学
化学工程
生物炭
碳化
活性炭
介孔材料
废水
朗缪尔
弗伦德利希方程
朗缪尔吸附模型
核化学
热解
有机化学
废物管理
工程类
催化作用
作者
Sakonsupa Damdib,Nuttamon Vanichsetakul,Phanuwat Pimpapoat,Sergey Mikhalovsky,Rosa Busquets,Adisak Siyasukh,Nattaporn Tonanon
摘要
The novel and intriguing role of Fe(NO 3 ) 3 as a chemical activator in carbonization of macadamia nutshell is introduced in this work. Magnetic mesoporous carbon was achieved by chemical activation of macadamia nutshell with Fe(NO 3 ) 3 under nitrogen atmosphere at 850°C (MMC-850). Porosity of MMC-850 included S BET 317 m 2 /g with V micro 0.0796 cm 3 /g and considerably high V meso 0.4318 cm 3 /g. Not only did MMC-850 possesses good magnetic properties with saturation magnetization and coercive force of 31.48 emu/g and 506.6 O e , respectively, but MMC-850 also showed high-removal efficiency of reactive black dye (RB5) with maximum adsorption capacity at 123.51 mg/g. The experimental data fit the Langmuir isotherm and Elovich model. Thermal regeneration was effective in degrading RB5 and removal ability was above 90% after two regeneration cycles. RB5 removal from water by MMC-850 as an adsorbent is considered a facile and inexpensive method since macadamia nutshell is a food by-product which is a green and renewable carbon precursor. MMC-850 is a potential adsorbent because it can be separated from wastewater treatment system using magnetic force. Besides, MMC-850 particle is not brittle compared to other porous biochar/activated carbon with similar size; therefore, it is an excellent candidate for column packing or scaling up for wastewater treatment facilities in the future.
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