Influence of inorganic salt on retention of ibuprofen by nanofiltration
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Influence of inorganic salt on retention of ibuprofen by nanofiltration

机译：无机盐对纳米滤灰保留的影响

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Highlights?The retention of ibuprofen by nanofiltration is discussed.?The influence of salt type and concentration on membrane process is illustrated.?Salt influences the ibuprofen-membrane interaction.?CaCl2gives better IBU retention than other two salts of Na2SO4and NaCl.AbstractThe retention of ibuprofen by a nanofiltration membrane (Desal 5 DK) was studied, considering the influence of the different co-existing salt (namely, NaCl, Na2SO4, CaCl2) with varying concentration (ionic strength from 10 to 100mM). The result shows that the Desal 5 DK cannot reject the ibuprofen satisfactorily (highest retention rate approximated to be ca.40%) in absence of salt, which agrees with the strong solute-membrane attraction. On the other hand, the presence of salt differentiates the membrane performance. An enhanced permeability of ibuprofen is only found when Na2SO4is present, giving lowest retention rate compared with other cases (without salt and with chloride-induced salts). NaCl improves the ibuprofen retention in a moderate extent. Donnan exclusions of the anions and membrane charge screening may be involved for these two mixtures. CaCl2gives the highest retention of ibuprofen mainly due to the specific interaction of calcium and carboxyl group, and the lowest adsorption of ibuprofen on membrane as well asacceptable permeate flux. Further study is needed to better understand the influence of salt on such emerging pollutants retention by membrane.]]>
机译：<！[cdata [ 亮点 ？ 通过纳米滤波器保留了布洛芬的保留。 ？ 盐类型和浓度对膜过程的影响被说明了。 ？ 盐影响了布洛芬膜的交互。 ？ cacl 2 比其他两个盐为na 2 so 4 和nacl。 < / ce：list> 抽象 研究了纳米过滤膜（Desal 5 DK）的保留，考虑到不同共存盐的影响（即，NaCl，Na 2 SO < CE：INF LOC =“POST”> 4 ，CACL 2 “，变化浓度（离子强度为10至100mm）。结果表明，在没有盐的情况下，Desal 5 DK不能拒绝令人满意的（近似为约40％的最高保留速度），这与强溶质膜吸引力同意。另一方面，盐的存在区分膜性能。当NA 2 SO 4 时，才会发现增强的布洛芬渗透性与其他病例相比（没有盐和氯化物诱导的盐）相比，保留率。 NaCl在适度的程度上提高了布洛芬保留。阴离子和膜充电筛选的龙牛排除可能涉及这两个混合物。 CACL 2> 2 主要是由于钙和羧基的特定相互作用，以及对膜上的最低吸附性渗透渗透剂的最低型渗透物。需要进一步研究以更好地了解盐对膜的这种新出现的污染物的影响。 ]]>

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