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首页> 外文期刊>Chemosphere >New use for spent coffee ground as an adsorbent for tetracycline removal in water
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New use for spent coffee ground as an adsorbent for tetracycline removal in water

机译：用过的咖啡渣作为吸附剂的新用途，用于去除水中的四环素

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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 pi-pi 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. (C) 2018 Elsevier Ltd. All rights reserved.
机译：用咖啡渣（SCG-1和SCG-2）研究四环素（TC）抗生素的吸附情况，并检测吸附时间，初始pH，吸附剂含量和离子强度的影响。比较了SCG-1和SCG-2的TC吸附等温线。结果表明，摇动2 h，SCG-1和SCG-2的TC（50 mg / L）去除率分别为83.1％和97.2％。吸附的可能性很高，并在约20分钟内达到平衡。根据Langmuir等温线的饱和吸附量和TCK-1的吸附平衡常数估算的TC参数分别为SCG-1和SCG-2分别为64.89 mg / g，0.0557 L / mg和0.4735 L / mg 。吸附机理可能是通过氢键以及TC分子和SCG之间在界面上发生的pi-pi相互作用。最后，我们发现SCG对TC具有很高的吸附尺寸。 （C）2018 Elsevier Ltd.保留所有权利。

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