School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, China.
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, China.
Chemosphere. 2020 Jul;251:126370. doi: 10.1016/j.chemosphere.2020.126370. Epub 2020 Mar 2.
Sewerage sludge-derived biochars (SSDBCs) with high adsorption capacity and excellent recyclability were synthesized to remove tetrabromobisphenol A (TBBPA) in aqueous system. Scanning electron microscopy, elemental mapping via energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy were used to characterize the morphology, composition, and microstructures. The maximum adsorption capacity of SSDBCs was about 87.02 mg g at 303 K and pH 7.5. The Langmuir isotherm demonstrated that the adsorption was mainly homogeneous and chemical processes. The kinetics of TBBPA removal well fitted the second-order dynamic model. Thermodynamic analysis showed that the adsorption was exothermic. The effect of π-π dispersive force and hydrogen bonding was proven as the main adsorption mechanism. Multiple cycle runs experiment revealed the excellent stability of recycled SSDBCs. This work provided a promising method of sludge resourceful treatment using an efficient, economic, cyclic, and convenient material for typical organic contaminant in the environment.
以具有高吸附能力和优异可回收性的污水污泥衍生生物炭（SSDBCs）为原料，在水溶液中去除四溴双酚 A（TBBPA）。采用扫描电子显微镜、能谱仪元素映射、X 射线光电子能谱和傅里叶变换红外光谱对其形貌、组成和微观结构进行了表征。在 303 K 和 pH 7.5 下，SSDBCs 的最大吸附容量约为 87.02 mg/g。Langmuir 等温线表明，吸附主要是均相和化学过程。TBBPA 的去除动力学很好地符合二级动力学模型。热力学分析表明，吸附是放热的。证明了 π-π 分散力和氢键是主要的吸附机制。多次循环运行实验表明，回收的 SSDBCs 具有优异的稳定性。这项工作为利用高效、经济、循环和方便的材料处理污泥资源提供了一种有前途的方法，这种材料可用于环境中典型的有机污染物。
