Abstract

The removal of an emerging pharmaceutical pollutant, sulfasalazine, which frequently detected in pharmaceutical industry wastewater as well as in drinking water, has been investigated by adsorption on a biosorbent, prepared from pomegranate peels in order to valorize food processing waste. After characterizing and determining the surface functions, morphology and textural properties of the biosorbent pomegranate peels, the effect of pollutant concentration, pH and adsorbent amount on the adsorption activity were evaluated by varying one parameter at a time. Results showed a quasi-total removal of sulfasalazine for a pH higher than 4.8, an initial pollutant concentration of 50 mg L⁻¹ and an adsorbent mass of 0.5 g. The isotherm, kinetic and thermodynamic parameters for sulfasalazine adsorption on the biosorbent have been estimated. Results revealed that the adsorption of sulfasalazine on pomegranate peels is a homogenous monolayer, spontaneous and endothermic process following a pseudo-second-order kinetic.

摘要

通过吸附在由石榴皮制备的生物吸附剂上，研究了一种新出现的药物污染物柳氮磺胺吡啶的去除，这种污染物经常在制药工业废水和饮用水中检测到，以使食品加工废物增值。在表征和确定生物吸附石榴皮的表面功能、形态和质地特性后，通过一次改变一个参数来评估污染物浓度、pH 和吸附剂用量对吸附活性的影响。结果表明，当 pH 值高于 4.8，初始污染物浓度为 50 mg L ^{-1时，柳氮磺胺吡啶几乎完全去除}和 0.5 g 的吸附剂质量。已经估计了柳氮磺吡啶吸附在生物吸附剂上的等温线、动力学和热力学参数。结果表明，柳氮磺吡啶在石榴皮上的吸附是一个均匀的单层、自发和吸热过程，遵循准二级动力学。