| Literature DB >> 30316158 |
Yingjie Dai1, Kexin Zhang2, Xianbing Meng2, Jingjing Li2, Xueting Guan3, Qiya Sun2, Yue Sun2, Wensi Wang2, Mu Lin2, Mei Liu4, Shengshu Yang4, Yanjun Chen2, Feng Gao2, Xu Zhang2, Zhihua Liu5.
Abstract
Spent coffee grounds (SCG-1 and SCG-2) were used to study the adsorption of tetracycline (TC) antibiotics and the effects of adsorption time, initial pH, amount of adsorbent and ionic strength were detected. The TC adsorption isotherm on SCG-1 was compared with SCG-2. The results showed that the removal efficiencies of TC (50 mg/L) of SCG-1 and SCG-2 were 83.1% and 97.2%, respectively, shake for 2 h. The probability of adsorption is high and balances in about 20 min. The estimate of parameters got for TC from the Langmuir isotherm saturated adsorption quantity and adsorption balance constant were 64.89 mg/g, 0.0557 L/mg, respectively for SCG-1 and 123.46 mg/g, 0.4735 L/mg, respectively for SCG-2. The adsorption mechanism might be a π-π interaction that occurs in the interface by hydrogen bonding and the between the TC molecular and the SCGs. At last, we found that SCG has a high adsorption size for TC.Entities:
Keywords: Hydrogen bond; Hydrophobic interaction; Oxygen-containing functional groups; Removal ratio; π–π interaction
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Year: 2018 PMID： 30316158 DOI： 10.1016/j.chemosphere.2018.09.150
Source DB: PubMed Journal: Chemosphere ISSN： 0045-6535 Impact factor: 7.086