Xin Guangzhi, Wang Min, Chen Lin, Zhang Yuzhou, Wang Meicheng, Jiang Wenju, Chen Yao
College of Architecture and Environment, Sichuan University Chengdu 610065 China
Southwest Oil and Gas Branch Co., SINOPEC Chengdu 610065 China.
RSC Adv. 2019 Feb 22;9(12):6452-6459. doi: 10.1039/c8ra08800d.
A novel adsorbent zeolite/N-doped porous activated carbon (ZAC) was prepared by the synthesis of zeolite and mesoporous carbon to remove ammonia nitrogen (NH -N) and chemical oxygen demand (COD) from aqueous solution. The impacts of adhesives, molding pressure, synthetic temperature and ratio on ZAC preparation were investigated. The prepared adsorbent was characterized by BET surface area measurement, scanning electron microscopy and X-ray diffraction. The adsorption kinetics was better depicted by the pseudo-second-order model than the pseudo-first-order model and the isotherm fitted well with the Langmuir model. The adsorption process was endothermic, spontaneous and favorable according to thermodynamic data. The adsorbent has much potential in the simultaneous removal of COD and NH -N from wastewater.
通过合成沸石和介孔碳制备了一种新型吸附剂沸石/氮掺杂多孔活性炭（ZAC），用于去除水溶液中的氨氮（NH₃-N）和化学需氧量（COD）。研究了粘合剂、成型压力、合成温度和比例对ZAC制备的影响。通过BET比表面积测量、扫描电子显微镜和X射线衍射对制备的吸附剂进行了表征。与伪一级模型相比，伪二级模型能更好地描述吸附动力学，且等温线与Langmuir模型拟合良好。根据热力学数据，吸附过程是吸热的、自发的且有利的。该吸附剂在同时去除废水中的COD和NH₃-N方面具有很大潜力。
