Rice straw-derived activated carbons for the removal of carbofuran from an aqueous solution

详细信息    查看全文

• 作者：Ken-Lin Chang^a ; Chih-Cheng Chen^b ; Jun-Hong Lin^c ; Jung-Feng Hsien^d ; Yin Wang^a ; Feng Zhao^a ; Yi-Hsuan Shih^b ; Zhen-Jiao Xing^a ; Shui-Tein Chen^e ; ^{bcchen@gate.sinica.edu.tw" class="auth_mail}
• 关键词：Rice straw ; Carbofuran ; Activated carbon ; Adsorption isotherm ; Kinetics
• 刊名：New Carbon Materials
• 出版年：February, 2014
• 年：2014
• 卷：29
• 期：1
• 页码：47-54
• 全文大小：4041 K

文摘

Activated carbon was prepared from rice straw by carbonization and KOH activation, and was used as an adsorbent for the removal of a kind of pesticide, carbofuran (2,3-dihydro-2,2-dimethylbenzofuran-7-yl methylcarbamate) from aqueous solution. The effects of the initial carbofuran concentration, contact time, temperature and pH, on its adsorption capacity and kinetics were studied using a batch method. The surface area and average pore diameter of the activated carbon were 1304.8 m²/g and 2.39 nm, respectively. The maximum adsorption capacity of the activated carbon (296.52 mg/g) for carbofuran was found to occur at 90 min, 30 掳C and 200 mg/L initial carbofuran concentration with an adsorbent loading of 100 mg/L. Equilibrium adsorption isotherms were fitted better by the Langmuir model than the Freundlich and Temkin models. The adsorption follows a pseudo-second-order kinetics model.