Adsorptive potential of Acacia nilotica based adsorbent for chromium(Ⅵ) from an aqueous phase

作     者：Raza Khalid Zaheer Aslam Aamir Abbas Waqar Ahmad Naveed Ramzan Reyad Shawabkeh 

作者机构：Department of Chemical Engineering University of Engineering and Technology Lahore 54890 Pakistan Department of Chemical Engineering King Fahd University of Petroleum and Minerals Dhahron 31261 Saudi Arabia 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2018年第26卷第3期

页      面：614-622页

核心收录：

学科分类：0710[理学-生物学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Acknowledgments Authors are thankful to Chemical Engineering Department University of Engineering and Technology Lahore for providing the facilities for conducting this research study 

主　　题：吸附物 相思树 废水 铬 吸附能力 移动效率 运动数据 HCl 

摘      要：The objective of this research was to enhance adsorption capacity of Acacia nilotica(keekar) sawdust for the abatement of chromium bearing wastewater and to investigate the effect of process parameters on adsorption capacity. The sawdust was activated by acid wash and functionalized subsequently with formaldehyde.Functionalization of activated sawdust raised its chromium removal efficiency of almost 10% as compared to its adsorption removal efficiency of HCl treated sawdust in a batch adsorption study. Adsorption kinetic data provided better fitting with pseudo second order model. Maximum adsorption capacity calculated through the best fitting Langmuir model was 6.34 mg·g^(-1) and 8.2 mg·g^(-1) for HCl treated and formaldehyde functionalized sawdust adsorbents, respectively. The adsorption of Cr(Ⅵ) was endothermic when studied by varying temperature from 20 °C to 50 °C for both activated and functionalized adsorbents.