Lee Ji Soo Lee Hanbi OH YUREE Ah-Jeong Choi Tae Hoon Seo Young-Kwan Kim Lee, Min Wook 2024-01-12T02:34:45Z 2024-01-12T02:34:45Z 2022-10-24 2022-12 https://pubs.kist.re.kr/handle/201004/75910 A coffee ground composite membrane for copper adsorption was prepared using used coffee grounds and polycaprolactone, a biodegradable polymer. The prepared sample shows a removal efficiency of 90 % or more in 4 h at a concentration of 100 mu M (= 13.45 ppm), which satisfies the drinking water acceptance criteria of 1.5 mg L-1 set by the World Health Organization. The functional groups of the coffee composite filter were analyzed with Xray photoelectron spectroscopy, and the surface of the filter membrane was analyzed using scanning electron microscope. UV-vis spectrophotometry confirmed the adsorption capacity and amount of Cu(II) adsorption of the filter or coffee grounds, and Langmuir, Freundlich, Redlich-Peterson, and Fritz-Schlunder isotherms were used to investigate the removal mechanism. The kinetic studies were also performed to clearly demonstrate the adsorption process. English Elsevier Limited Used coffee/PCL composite filter for Cu(II) removal from wastewater Article 10.1016/j.jwpe.2022.103253 1 Journal of Water Process Engineering, v.50 Journal of Water Process Engineering 50 N scie scopus 000904180100004 Engineering, Environmental Engineering, Chemical Water Resources Engineering Water Resources Article HEAVY-METALS ACTIVATED CARBON ADSORPTION COPPER CHROMIUM IONS EQUILIBRIUM LIME Coffee Cu(II) Adsorption Filter Composite