In this work, flax shives and oat hulls representative of cellulosic materials of agricultural byproducts were used to develop hydrochars and steam-activated hydrochar adsorbents. They were used to adsorb carbamazepine (CBZ) as a model pharmaceutical pollutant from artificially contaminated water. The adsorbents were characterized by surface properties and composition. CBZ equilibrium adsorption was investigated at various temperatures (20−40 °C) and solution pH (2−10). Steam-activation enhanced the CBZ equilibrium uptake of hydrochars made from either flax shives or oat hulls; however, both the hydrochars with or without steam-activation demonstrated effective CBZ adsorption in comparison with numerous adsorbents reported in the literature. The achieved CBZ uptake was insignificantly affected by solution pH, indicating that the adsorbents developed in this work could be applied to remove CBZ and similar pharmaceutical pollutants from water/wastewater with a wide range of pH values. The CBZ adsorption was effective at room temperature which was enhanced at a higher temperature, showing the adsorption was endothermic in nature. The results demonstrated that flax shives and oat hulls were a promising feedstocks for making into adsorbents for water treatment.

在这项工作中，代表农业副产品纤维素材料的亚麻碎屑和燕麦壳被用于开发水炭和蒸汽活化的水炭吸附剂。它们被用来从人为污染的水中吸附卡马西平 (CBZ) 作为模型药物污染物。吸附剂的特征在于表面性质和组成。在不同温度 (20-40 °C) 和溶液 pH (2-10) 下研究了 CBZ 平衡吸附。蒸汽活化增强了由亚麻碎屑或燕麦壳制成的氢化碳的 CBZ 平衡吸收；然而，与文献中报道的众多吸附剂相比，无论有没有蒸汽活化的加氢碳都显示出有效的 CBZ 吸附。实现的 CBZ 吸收不受溶液 pH 值的影响，表明在这项工作中开发的吸附剂可用于从具有广泛 pH 值的水/废水中去除 CBZ 和类似的药物污染物。CBZ吸附在室温下有效，在较高温度下吸附增强，表明吸附本质上是吸热的。结果表明，亚麻碎屑和燕麦壳是一种很有前途的原料，可用于制造水处理吸附剂。