Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment and Resources, Fuzhou University, Fuzhou 350116, Fujian, China; Fujian Provincial Technology Exploitation Base of Biomass Resources, Fuzhou University, Fuzhou 350116, China.
Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment and Resources, Fuzhou University, Fuzhou 350116, Fujian, China; Fujian Provincial Technology Exploitation Base of Biomass Resources, Fuzhou University, Fuzhou 350116, China.
Bioresour Technol. 2021 Jun;329:124856. doi: 10.1016/j.biortech.2021.124856. Epub 2021 Feb 17.
In this study, the sulfonic group was introduced to prepare high-performance Eucommia ulmoides lignin-based biochar, which was used to remove tetracycline hydrochloride. The BET area (2008 m g) of sulfonated biochar was twice that of unmodified biochar. Through XRD and Raman analysis, the synergetic pyrolysis mechanism of the sulfonic group in the formation of the porous structure was discussed. Sulfonated biochar had excellent adsorption performance for tetracycline hydrochloride (Q: 1163 mg g), while the adsorption performance of unmodified biochar was about only one-fourth (Q: 277.7 mg g) of that. The adsorption of tetracycline hydrochloride by the sulfonated biochar was spontaneously endothermic and conformed to the Langmuir isotherm model. The adsorption process was confirmed by pseudo-second-order kinetic model. Moreover, the sulfonic group on the sulfonated biochar significantly promoted the formation of the hydrogen bond and greatly improved the adsorption performance.
在这项研究中，引入了磺酸基来制备高性能的杜仲木质素基生物炭，用于去除盐酸四环素。磺化生物炭的 BET 面积（2008 m²/g）是未改性生物炭的两倍。通过 XRD 和 Raman 分析，讨论了磺酸基在形成多孔结构过程中的协同热解机制。磺化生物炭对盐酸四环素（Q: 1163 mg/g）具有优异的吸附性能，而未改性生物炭的吸附性能仅约为其四分之一（Q: 277.7 mg/g）。盐酸四环素在磺化生物炭上的吸附是自发的吸热过程，符合朗缪尔等温模型。吸附过程通过拟二级动力学模型得到证实。此外，磺化生物炭上的磺酸基显著促进了氢键的形成，极大地提高了吸附性能。
