Abstract Activated carbon derived from raw corncob (CCAC), which prepared with steam as the activating agent, was used to adsorb bisphenol S (BPS) from aqueous solution. Characterizations of CCAC were measured by using the Brunauer-Emmett-Teller, scanning electron microscopy, and Fourier transform infrared spectroscopy. Adsorption conditions including initial BPS concentration, contact time, adsorbent dosage and pH were optimized by response surface methodology (RSM). The results show that adsorption equilibrium was well described by the Langmuir and Koble–Corrigan models. The maximum monolayer adsorption capacity of BPS was found to be 617.29 mg g−1 at 298 K. Based on the thermodynamic parameters analysis, the BPS adsorption process was turned out to be spontaneous and exothermic. The adsorption process of BPS was well described by the pseudo-second-order kinetic model. It also found that H-bonding, π–π interaction, and electrostatic interaction were the main mechanisms in the process of BPS adsorption onto the CCAC.

中文翻译：

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用玉米芯制备的活性炭吸附双酚 S：使用响应面法进行优化

摘要 以水蒸气为活化剂制备的生玉米芯活性炭（CCAC）用于吸附水溶液中的双酚S（BPS）。CCAC 的表征通过使用 Brunauer-Emmett-Teller、扫描电子显微镜和傅里叶变换红外光谱来测量。吸附条件包括初始 BPS 浓度、接触时间、吸附剂剂量和 pH 值通过响应面方法 (RSM) 进行优化。结果表明，Langmuir 和 Koble-Corrigan 模型很好地描述了吸附平衡。发现 BPS 的最大单层吸附容量在 298 K 时为 617.29 mg g-1。基于热力学参数分析，BPS 吸附过程被证明是自发和放热的。BPS的吸附过程可以用拟二级动力学模型很好地描述。还发现氢键、π-π 相互作用和静电相互作用是 BPS 吸附到 CCAC 过程中的主要机制。