School of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China.
School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China.
Environ Sci Pollut Res Int. 2018 Jul;25(19):18705-18716. doi: 10.1007/s11356-018-1935-0. Epub 2018 Apr 29.
The rapid industrialization and modern agriculture, increasing emission of heavy metals, and abusing application of pesticide have changed biochemical features of the soil system and water system. Additionally, heavy metals and pesticide compounds may occur together in environments, giving rise to more serious damage to the environment because of their combined toxicity and carcinogenic properties. Therefore, there is a growing need for the development of low-cost adsorbents for their removal. Porous carbon materials have been considered as highly effective materials for pollutant ion control. In this thesis, a novel porous "carbon sponge" is produced using sucrose (S-PCS) with gas-producing molten salt KHCO as the activator at different pyrolysis temperatures under a limited-oxygen condition. Results from these characterizations have indicated that the as-prepared carbon sponges share high surface area (up to 457.6434 m g) and abundant oxygen-containing functional groups existed on the surface. The essential factors of contact time, initial concentrations, and cyclic availability on adsorption of lead ions and atrazine onto the as-prepared porous samples are also discussed. The typical kinetic and thermodynamic models are carried out to interpret the adsorption behaviors of lead ions and atrazine. The interactive effects and mechanism of lead ions and atrazine adsorption onto S-PCS samples are examined by simultaneous adsorption and preloading adsorption procedures. Combined with the economic and environmental merits of the raw materials, the porous carbon sponges of sucrose by KHCO activated are promising materials for potential practical applications. Graphical abstract The schematic diagram on the preparation of porous carbon sponse from sucrose.
快速工业化和现代农业的发展，重金属排放量的增加，以及农药的滥用，改变了土壤系统和水系的生化特性。此外，重金属和农药化合物可能在环境中共存，由于它们的联合毒性和致癌特性，对环境造成更严重的破坏。因此，开发用于去除它们的低成本吸附剂的需求日益增长。多孔碳材料已被认为是控制污染物离子的高效材料。在本论文中，使用蔗糖（S-PCS）和产气熔融盐 KHCO3 在有限氧条件下，在不同的热解温度下制备了一种新型的多孔“碳海绵”。这些特性的结果表明，所制备的碳海绵具有高表面积（高达 457.6434 m2/g）和丰富的表面含氧官能团。还讨论了接触时间、初始浓度和循环可用性对吸附铅离子和莠去津的影响。通过同时吸附和预加载吸附程序，研究了典型的动力学和热力学模型来解释铅离子和莠去津的吸附行为。通过同步吸附和预加载吸附程序，考察了铅离子和莠去津在 S-PCS 样品上吸附的相互作用效应和机理。结合原材料的经济和环境效益，由 KHCO3 激活的蔗糖多孔碳海绵是潜在实际应用的有前途的材料。
