Removal of diphenhydramine from water by swelling clay minerals

Zhaohui Li, Po Hsiang Chang, Wei Teh Jiang, Jiin Shuh Jean, Hanlie Hong, Libing Liao

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

Frequent detection of pharmaceuticals in surface water and wastewater attracted renewed attention on studying interactions between pharmaceuticals and sludge or biosolids generated from wastewater treatment. Less attention was focused on studying interactions between pharmaceuticals and clay minerals, important soil and sediment components. This research targeted on investigating interactions between diphenhydramine (DPH), an important antihistamine drug, and a montmorillonite, a swelling clay, in aqueous solution. Stoichiometric desorption of exchangeable cations accompanying DPH adsorption confirmed that cation exchange was the most important mechanism of DPH uptake by the swelling clay. When the solution pH was below the pKa of DPH, its adsorption on the swelling clay was less affected by pH. Increasing solution pH above the pKa value resulted in a decrease in DPH adsorption by the clay. An increase in d001 spacing at a high DPH loading level suggested interlayer adsorption, thus, intercalation of DPH. The results from this study showed that swelling clays are a good environmental sink for weak acidic drugs like DPH. In addition, the large cation exchange capacity and surface area make the clay a good candidate to remove cationic pharmaceuticals from the effluent of wastewater treatment facilities.

原文English
頁(從 - 到)227-232
頁數6
期刊Journal of Colloid And Interface Science
360
發行號1
DOIs
出版狀態Published - 2011 8月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 生物材料
  • 表面、塗料和薄膜
  • 膠體和表面化學

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