{"refrec":{"BRefID":448525,"RR":"<b>Zhang, X.; Guo, W.; Du, L.; Huo, S.; Li, J.; Gao, Y.</b> (2026). Aging and salinity jointly control the co-transport mechanisms of nanoplastics and 4-nonylphenol in estuarine soils: Multi-scale insights from molecular interaction to pore network evolution. <i>Wat. Res. 300</i>: 125961. <a href=\"https://dx.doi.org/10.1016/j.watres.2026.125961\" target=\"_blank\">https://dx.doi.org/10.1016/j.watres.2026.125961</a>","BEntID":446363,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Wat. Res. 300</i>: 125961. <a href=\"https://dx.doi.org/10.1016/j.watres.2026.125961\" target=\"_blank\">https://dx.doi.org/10.1016/j.watres.2026.125961</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Zhang, X.; Guo, W.; Du, L.; Huo, S.; Li, J.; Gao, Y.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Zhang, X. <i>et al.</i>","Englishabstract":"Coastal estuaries are key hotspots for the accumulation of nanoplastics and hydrophobic organic pollutants, yet the co-transport of these contaminants under coupled salinity fluctuations and plastic aging remains poorly understood. This study integrated microcosm soil column experiments, micro-computed tomography (Micro-CT), and molecular dynamics (MD) simulations to elucidate the co-transport of pristine/aged polymethyl methacrylate nanoplastics (PMN) and 4-nonylphenol (4-NP) in saturated estuarine soils along salinity gradients. Pristine PMN inhibited 4-NP migration through co-deposition, whereas aged PMN acted as a source of dynamic release, facilitating its continuous breakthrough migration. Notably, 4-NP exerted a bidirectional feedback effect on PMN migration. Although it enhanced the migration efficiency of pristine PMN by 3.8-22.9% through electrostatic repulsion and site competition, it acted as a molecular bridge to trigger heterogeneous aggregation, thereby impeding the transport of aged PMN and reducing its recovery to as low as 10.3% at 5 PSU. Salinity further amplified these aging-related interactions, increasing aggregate size by 6.3-14.8% and enhancing attachment efficiency by a factor of 1.6-3.2 within the range of 0.5 to 5 PSU. MD simulations indicated that oxygen-containing functional groups on the surface of aged PMN provided high affinity binding sites for 4-NP by enhancing hydrogen bonding. Micro-CT visualisation and pore network modelling further confirmed that high salinity narrowed pore size distribution and reduced connectivity, increasing the fraction of low-connectivity pores from 4.3% to 6.2%, thereby forming hydrodynamic dead zones that enhanced the retention of enlarged PMN/4-NP hetero-aggregates within them. These findings provide multi-scale insights into the fate of composite pollutants and inform strategies for assessing pollution risks in salinized farmlands and coastal groundwater systems.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Aging and salinity jointly control the co-transport mechanisms of nanoplastics and 4-nonylphenol in estuarine soils: Multi-scale insights from molecular interaction to pore network evolution","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-09-29 01:49:32.136038","timezone_type":1,"timezone":"+02:00"},"AuthorKeywords":"Nanoplastics;4-nonylphenol;Co-transport;Micro-CT;Saltwater intrusion;polystyrene nanoplastics;salt intrusion;river estuary;aggregation;microplastics;transport;toxicity","OtherDescriptors":null,"Notes":null,"AnaPub":2026,"MonPub":null,"DateUpdate":"2026-09-28","DateCreate":"2026-09-28","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:001756343300001","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.watres.2026.125961"},"refs":null,"anarec":{"AnaID":448525,"PubliDate":2026,"Pagination":"125961","XtraPublOfAnaID":null,"ISBN":null,"Volume":"300","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44009,"SerRR":"Water Research. Elsevier: Oxford; New York.  ISSN 0043-1354; e-ISSN 1879-2448","StandardTitleSer":"Water Research","ISSN":"0043-1354","AbbrevSer":"Wat. 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