Transport of TiO2 nanoparticles in soil in the presence of surfactants

Sun, Peide; Zhang, Keke; Fang, Jing; Lin, Daohui; Wang, Minhao; Han, Jun

doi:10.1016/j.scitotenv.2015.05.031

Cited by 56 publications

(12 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…reported that surfactants decreased the mobility of nano-TiO2 in soil columns and the inhibiting ability of different surfactants followed the order of SDS >Triton X-100. They thought the strong adsorption of surfactants on soil and nano-TiO2 was mainly responsible for the decrease of mobility 41 . The difference was mainly caused by the types and surface characteristics of medium and nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Transport of cerium oxide nanoparticles in saturated silica media: influences of operational parameters and aqueous chemical conditions

Zhang

Gao

Qiu

et al. 2016

Sci Rep

View full text Add to dashboard Cite

This paper aimed to investigate the influences of operational parameters and aqueous chemical conditions on transport behaviors of cerium oxides nanoparticles (CeO2-NPs) in saturated silica media. Results indicated that increasing rates of attachment efficiency (α) were related with cationic types, and critical deposition concentration (CDC) for divalent cation (Ca2+ and Mg2+) were more than 31-fold of that for monovalent cation (Na+ and K+). Increase or reduction of electrolyte pH could both promote the mobility of CeO2-NPs in glass beads, while influence was more evident at alkaline conditions. α increased linearly with NPs concentrations, while decreased linearly with flow velocity in the column, and effects were related with electrolyte contents. Presence of surfactants could sharply decreased α, and SDS was more effective to facilitate CeO2-NPs transport than Triton X–100. With DOMs concentrations increasing, α firstly kept constant, then sharply declined, and finally reduced very slowly. The influence of DOMs on NPs deposition was in order of SA > HA > TA > BSA. Overall, this study revealed that aqueous chemical conditions was crucial to NPs transport in porous media, and would provide significant information for our understanding on the fate and transport of nanoparticles in natural environment.

show abstract

Section: Resultsmentioning

confidence: 99%

Transport of cerium oxide nanoparticles in saturated silica media: influences of operational parameters and aqueous chemical conditions

Zhang

Gao

Qiu

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Surfactants are widely present in aquatic environments [80] and have shown strong influences on facilitating the transport of ENPs in subsurface environment [25,47,70,[81][82][83]. The presence of surfactants has also been found to reduce the aggregation of various ENPs including nanosized TiO 2 [25,84,85], MWCNTs [76], GO [86], and Ag [79].Previous studies have explored the effects of different types of surfactants on ENP transport in porous media. Lu et al [76] compared the effects of three different surfactants (i.e., sodium dodecylbenzenesulfonate (SDBS), octyl phenol ethoxylate (TX-100) and cetylpyridinium chloride (CPC), representing anionic, nonionic, and cationic surfactants, respectively) on MWCNT transport in quartz sand (negatively charged)columns.…”

Section: 4particle Surface Propertiesmentioning

confidence: 99%

Review of key factors controlling engineered nanoparticle transport in porous media

Wang

Gao

De-shan

2016

Journal of Hazardous Materials

137

View full text Add to dashboard Cite

Nanotechnology, an emerging technology, has witnessed rapid development in production and application. Engineered nanomaterials revolutionize the industry due to their unique structure and superior performance. The release of engineered nanoparticles (ENPs) into the environment, however, may pose risks to the environment and public health. To advance current understanding of environmental behaviors of ENPs, this work provides an introductory overview of ENP fate and transport in porous media. It systematically reviews the key factors controlling their fate and transport in porous media. It first provides a brief overview of common ENPs in the environment and their sources. The key factors that govern ENP transport in porous media are then categorized into three groups: (1) nature of ENPs affecting their transport in porous media, (2) nature of porous media affecting ENP transport, and (3) nature of flow affecting ENP transport in porous media. In each group, findings in recent literature on the specific governing factors of ENP transport in porous media are discussed in details. Finally, this work concludes with remarks on the importance of ENP transport in porous media and directions for future research.

show abstract

“…To date, many studies [10,11,19,20] have focused on the effect of surfactant on the aggregation behaviors of NPs in simulated natural waters. To address the current limitations in knowledge regarding the effect of surfactants on ZnO NPs behavior in natural surface waters and its fundamental mechanism, we thoroughly studied the effect of two surfactants, i.e., anionic sodium dodecyl sulfate (SDS) and nonionic nonylphenol ethoxylates (NPEO), on the stability, dissolution, and sedimentation of ZnO in different aquatic chemistry conditions.…”

Section: Introductionmentioning

confidence: 99%

Removal of ZnO Nanoparticles from Natural Waters by Coagulation-Flocculation Process: Influence of Surfactant Type on Aggregation, Dissolution and Colloidal Stability

et al. 2018

View full text Add to dashboard Cite

The zinc oxide nanoparticles (ZnO NPs) and surfactants that are widely used in commercial and industrial products lead to the likelihood of their co-occurrence in natural water, making it essential to investigate the effect of surfactants on the fate and mobility of ZnO NPs. The present study seeks to elucidate the effect of an anionic sodium dodecyl sulfate (SDS) and a nonionic nonylphenol ethoxylate (NPEO), on ZnO NPs adsorption, aggregation, dissolution, and removal by the coagulation process. The results indicate that the presence of SDS in ZnO NPs suspension significantly reduced the ζ-potential and hydrodynamic diameter (HDD), while the effect of NPEO was found not to be significant. The sorption of SDS and NPEO by ZnO NPs were fitted with Langmuir model, but the Freundlich isotherm was more suitable for SDS at pH 9.0. Moreover, the adsorption was strongly pH-dependent due to the formation of mono-bilayer patches onto the NPs. The SDS remarkably affect the dissolution and aggregation phenomena of ZnO NPs in natural waters as compared to NPEO. Finally, the coagulation results showed that the removal efficiency of ZnO, Zn2+ and the surfactant in synthetic and wastewaters at optimum ferric chloride (FC) dosage reached around 85–98% and 20–50%, respectively. Coagulation mechanism investigation demonstrated that the cooperation of charge neutralization and adsorptive micellar flocculation (AMF) might play an important role. In summary, this study may provide new insight into the environmental behavior of coexisting ZnO NPs and surfactants in water treatment processes, and it may facilitate their sustainable use in commercial products and processes.

show abstract

Transport of TiO2 nanoparticles in soil in the presence of surfactants

Cited by 56 publications

References 64 publications

Transport of cerium oxide nanoparticles in saturated silica media: influences of operational parameters and aqueous chemical conditions

Transport of cerium oxide nanoparticles in saturated silica media: influences of operational parameters and aqueous chemical conditions

Review of key factors controlling engineered nanoparticle transport in porous media

Removal of ZnO Nanoparticles from Natural Waters by Coagulation-Flocculation Process: Influence of Surfactant Type on Aggregation, Dissolution and Colloidal Stability

Contact Info

Product

Resources

About