<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Xuming Xu</style></author><author><style face="normal" font="default" size="100%">Yuxin Liu</style></author><author><style face="normal" font="default" size="100%">Ting Wang</style></author><author><style face="normal" font="default" size="100%">Ji, Haodong</style></author><author><style face="normal" font="default" size="100%">Long Chen</style></author><author><style face="normal" font="default" size="100%">Si Li</style></author><author><style face="normal" font="default" size="100%">Liu, Wen</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Co-adsorption of ciprofloxacin and Cu(II) onto titanate nanotubes: Speciation variation and metal-organic complexation</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Molecular Liquids</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Adsorption</style></keyword><keyword><style  face="normal" font="default" size="100%">Complexation</style></keyword><keyword><style  face="normal" font="default" size="100%">Emerging organic contaminant</style></keyword><keyword><style  face="normal" font="default" size="100%">Heavy metal</style></keyword><keyword><style  face="normal" font="default" size="100%">Interaction mechanism</style></keyword><keyword><style  face="normal" font="default" size="100%">Titanate nanotubes</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2019</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S0167732219307901</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">292</style></volume><pages><style face="normal" font="default" size="100%">111375</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Titanate nanotubes (TNTs) have been reported to show good adsorption performance for heavy metals, but researches on organic contaminants adsorption by TNTs are limited. In this study, co-adsorption of a heavy metal (Cu) and an emerging organic contaminant (ciprofloxacin, CIP) by TNTs was investigated in binary systems. TNTs could simultaneously remove the two contaminants, with a high adsorption capacity of 234.5 μmol/g for Cu(II) and 237.0 μmol/g for CIP at pH 4 in the binary system. pH greatly affected adsorption due to speciation variation of the contaminants and surface charge change of TNTs. Cu(II)-CIP complexes dominated adsorption capacity and mechanism. Adsorption of CIP was promoted by high concentration of Cu(II) at pH 3–8 due to formation of abundant Cu(CIP±)2+, while inhibited by low concentration of Cu(II) because of competitive adsorption. The adsorption affinity of CIP species to TNTs was ranked as: Cu(CIP±)2+ &amp;gt; CIP+ &amp;gt; CIP± &amp;gt; Cu(CIP±)2+ &amp;gt; Cu(CIP−·CIP±)+ &amp;gt; CIP−. In comparison, the co-existence of CIP slightly affected Cu(II) adsorption considering the strong affinity of Cu2+ to TNTs. X-ray photoelectron spectrometer (XPS) and Fourier transform infrared spectroscopy (FTIR) results further confirmed the formation of Cu(II)-CIP complexes through –NH2Cu/–COOCu linkages. This work not only proposed a feasible technology for co-removal of heavy metals and organics from water, but also presented insight into interaction mechanisms of different contaminants with nanomaterials during adsorption.</style></abstract></record></records></xml>