School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China.
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China.
Environ Sci Pollut Res Int. 2022 Aug;29(38):57773-57789. doi: 10.1007/s11356-022-19870-z. Epub 2022 Mar 30.
Thalia dealbata Fraser-derived biochar was prepared at different carbonization temperatures to remove nutrients in aqueous solution. Thermogravimetry/differential thermogravimetry (TG/DTG) was used to analyze the carbonization and decomposition procedure of Thalia dealbata Fraser. X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), zeta potential, and N adsorption-desorption isotherms were employed to characterize the prepared biochar. The carbonization temperature obviously effected the physical and chemical properties of biochar. The adsorption efficiency of ammonia (NH-N), nitrate (NO-N), and phosphate (PO) adsorption on biochar was tested. Pseudo-first-order kinetic, pseudo-second-order kinetic, and intra-particle diffusion kinetic models were used to fit adsorption kinetic. Langmuir and Freundlich models were used to fit adsorption isotherms. The theoretical adsorption capacity of NH-N, NO-N, and PO on biochar was 5.8 mg/g, 3.8 mg/g, and 1.3 mg/g, respectively. This study provides the insights for effect of carbonization temperature on biochar preparation and application.
白星海芋衍生生物炭在不同碳化温度下制备，以去除水溶液中的养分。热重/差示热重（TG/DTG）用于分析白星海芋的碳化和分解过程。X 射线衍射（XRD）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、动电位和 N 吸附-解吸等温线用于表征制备的生物炭。碳化温度明显影响生物炭的物理和化学性质。测试了生物炭对氨（NH-N）、硝酸盐（NO-N）和磷酸盐（PO）吸附的吸附效率。采用伪一阶动力学、伪二阶动力学和内扩散动力学模型对吸附动力学进行拟合。Langmuir 和 Freundlich 模型用于吸附等温线拟合。NH-N、NO-N 和 PO 在生物炭上的理论吸附容量分别为 5.8、3.8 和 1.3mg/g。本研究为碳化温度对生物炭制备和应用的影响提供了见解。
