Wang Xuekai, Wang Jinshu, Li Jianjun, Du Yucheng, Wu Junshu, He Heng
Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China.
Materials (Basel). 2023 Jul 29;16(15):5338. doi: 10.3390/ma16155338.
Tetracycline (TC) and arsenic contaminants are two main pollutants in aquaculture and livestock husbandry, and they have drawn worldwide attention. To address this issue, a novel N-doped carbon@magnesium silicate (CMS) was fabricated via a facile and low-cost hydrothermal route, adopting glucose and ammonia as C and N sources, respectively. The synergetic combination of carbon and magnesium silicate makes CMS possess a high surface area of 201 m/g and abundant functional groups. Due to the abundant C- and N-containing functional groups and Mg-containing adsorptive sites, the maximum adsorption capacity values of CMS towards As(V) and TC are 498.75 mg/g and 1228.5 mg/g, respectively. The type of adsorption of As(V) and TC onto CMS is monolayer adsorption. An adsorption kinetic study revealed that the mass transfer and intraparticle process dominates the sorption rate of As(V) and TC adsorption onto CMS, respectively. Various functional groups synthetically participate in the adsorption process through complexion, π-π EDA interactions, and hydrogen bonds. This work provides a one-step, low-cost route to fabricate a N-doped carbonaceous adsorbent with a high surface area and abundant functional groups, which has great potential in the application of practical sewage treatment.
四环素（TC）和砷污染物是水产养殖和畜牧业中的两种主要污染物，已引起全球关注。为解决这一问题，通过简便且低成本的水热法制备了一种新型的氮掺杂碳@硅酸镁（CMS），分别采用葡萄糖和氨作为碳源和氮源。碳和硅酸镁的协同组合使CMS具有201 m/g的高比表面积和丰富的官能团。由于含有丰富的含碳和含氮官能团以及含镁吸附位点，CMS对As(V)和TC的最大吸附容量分别为498.75 mg/g和1228.5 mg/g。As(V)和TC在CMS上的吸附类型为单层吸附。吸附动力学研究表明，传质和颗粒内过程分别主导了As(V)和TC在CMS上的吸附速率。各种官能团通过络合、π-π电子给体-受体相互作用和氢键综合参与吸附过程。这项工作提供了一种一步法、低成本的路线来制备具有高比表面积和丰富官能团的氮掺杂碳质吸附剂，在实际污水处理应用中具有巨大潜力。
