Adsorption-desorption of phenolic compounds from olive mills wastewater using Tunisian natural clay

• 作者: Islem Chaari Atef Touil Mounir Medhioub
• 来源期刊: 中国化学工程学报（英文版）
• 年，卷（期）: 2021,（12）
• 所属期刊栏目: Resources and Environmental Technology
• 页码范围: 287-292
• 页数: 6页
• 语种: 英文

摘要

Olive mills wastewater (OMW) exhibit substantial contaminated properties due to their content of phe-nolic constituents and organic substances.The purpose of this work was the investigation of the effi-ciency of clay materials for the adsorption of phenolic compounds,which are contained in OMW.Furthermore,thermal activation of the clay took place in order to improve phenolic compounds uptake and afterwards,desorption process was studied.The adsorbent was characterized using XRD,XRF and BET surface area analyses.The adsorption efficiency of phenolic compounds by raw and calcined clay at 600 ℃ was 77.61％ and 84.21％,respectively at acidic pH.The values of Gibbs free energy indicated that adsorption process is spontaneous and beneficial at higher temperatures.Alkaline medium was propi-tious for phenolic compounds desorption.The obtained results showed that natural clay could be used as a low-cost adsorbent for OMW treatment.