State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China E-mail:
Water Sci Technol. 2013;68(7):1512-9. doi: 10.2166/wst.2013.392.
Spiramycin removal from wastewater using four nanofiltration (NF) membranes (NF270, NF90, ESNA1-K1 and ESNA1-LF2-LD) was studied. The effects of operating pressure, feed temperature, feed concentration, cation and anion ions on the permeate flux rate and spiramycin rejection were investigated. The results show that increasing operating pressure resulted in the increase of both permeate flux and spiramycin rejection. The flux rate increased almost linearly with temperature, while the spiramycin rejection decreased. The permeate flux rate declined relatively with increasing feed concentration of spiramycin for NF270 and ESNA1-LF2-LD membranes compared with NF90 and ESNA1-K membranes. The presence of cations reduced spiramycin rejection, with the strength of influence for the NF270 NF membrane following the order Mg(2+)>Ca(2+)>K(+). The presence of anions also resulted in decreased spiramycin rejection, the strength of the effect following the order NO(3)(-)>Cl(-)>SO(4)(2-) for the NF270 membrane.
采用四种纳滤膜（NF270、NF90、ESNA1-K1 和 ESNA1-LF2-LD）研究了从废水中去除螺旋霉素。考察了操作压力、进料温度、进料浓度、阳离子和阴离子对渗透通量和螺旋霉素截留率的影响。结果表明，操作压力的增加导致渗透通量和螺旋霉素截留率的增加。通量几乎随温度线性增加，而螺旋霉素的截留率降低。与 NF90 和 ESNA1-K 膜相比，NF270 和 ESNA1-LF2-LD 膜的进料浓度增加时，渗透通量下降。阳离子的存在降低了螺旋霉素的截留率，对 NF270 NF 膜的影响强度顺序为 Mg(2+)>Ca(2+)>K(+)。阴离子的存在也导致螺旋霉素截留率降低，对 NF270 膜的影响强度顺序为 NO(3)(-)>Cl(-)>SO(4)(2-)。
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