Hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water production
Summary: Flocculation is a mainstream technology for the provision of safe drinking water but is limited due to the ineffectiveness of conventional flocculants in removing trace low-molecular-weight emerging contaminants. We described a synthesis strategy for the development of high-performance nano...
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doaj-73dc35eb50d0427685f74ee846e3c7382021-05-28T05:03:56ZengElsevieriScience2589-00422021-05-01245102491Hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water productionZhen Yang0Lina Zhao1Min Hu2Di Cai3Ziqi Tian4Jan Baeyens5Raf Dewil6Peiyong Qin7Weiben Yang8Nigel J.D. Graham9School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, China; Corresponding authorSchool of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, ChinaSchool of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, ChinaCollege of Life Science and Technology, National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, ChinaNingbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315000, ChinaCollege of Life Science and Technology, National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, China; Department of Chemical Engineering, Process and Environmental Technology Lab, KU Leuven, 2860 Sint-Katelijne-Waver, BelgiumDepartment of Chemical Engineering, Process and Environmental Technology Lab, KU Leuven, 2860 Sint-Katelijne-Waver, BelgiumCollege of Life Science and Technology, National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, ChinaSchool of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, ChinaDepartment of Civil and Environmental Engineering, Imperial College London, London, SW7 2AZ, UKSummary: Flocculation is a mainstream technology for the provision of safe drinking water but is limited due to the ineffectiveness of conventional flocculants in removing trace low-molecular-weight emerging contaminants. We described a synthesis strategy for the development of high-performance nanoflocculants (hydrophobic-organic-chain-modified metal hydroxides [HOC-M]), imitating surfactant-assembling nano-micelles, by integration of long hydrophobic chains with traditional inorganic metal (Fe/Al/Ti)-based flocculants. The core-shell nanostructure was highly stable in acidic stock solution and transformed to meso-scale coagulation nuclei in real surface water. In both jar and continuous-flow tests, HOC-M was superior over conventional flocculants in removing many contaminants (turbidity, UV254, and DOC: >95%; TP and NO3-N: >90%; trace pharmaceuticals [initial concentration: 100 ng/L]: >80%), producing flocs with better structural and dewatering properties, and lowering the environmental risk of metal leaching. The rationally designed nanoflocculants have large application potential, as a solution to increasing public concern about micro-pollutants and increasing water quality requirements.http://www.sciencedirect.com/science/article/pii/S2589004221004594environmental chemical engineeringsurface chemistryenvironmental scienceenvironmental chemistrywater resources engineering |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhen Yang Lina Zhao Min Hu Di Cai Ziqi Tian Jan Baeyens Raf Dewil Peiyong Qin Weiben Yang Nigel J.D. Graham |
spellingShingle |
Zhen Yang Lina Zhao Min Hu Di Cai Ziqi Tian Jan Baeyens Raf Dewil Peiyong Qin Weiben Yang Nigel J.D. Graham Hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water production iScience environmental chemical engineering surface chemistry environmental science environmental chemistry water resources engineering |
author_facet |
Zhen Yang Lina Zhao Min Hu Di Cai Ziqi Tian Jan Baeyens Raf Dewil Peiyong Qin Weiben Yang Nigel J.D. Graham |
author_sort |
Zhen Yang |
title |
Hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water production |
title_short |
Hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water production |
title_full |
Hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water production |
title_fullStr |
Hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water production |
title_full_unstemmed |
Hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water production |
title_sort |
hydrophobic-modified metal-hydroxide nanoflocculants enable one-step removal of multi-contaminants for drinking water production |
publisher |
Elsevier |
series |
iScience |
issn |
2589-0042 |
publishDate |
2021-05-01 |
description |
Summary: Flocculation is a mainstream technology for the provision of safe drinking water but is limited due to the ineffectiveness of conventional flocculants in removing trace low-molecular-weight emerging contaminants. We described a synthesis strategy for the development of high-performance nanoflocculants (hydrophobic-organic-chain-modified metal hydroxides [HOC-M]), imitating surfactant-assembling nano-micelles, by integration of long hydrophobic chains with traditional inorganic metal (Fe/Al/Ti)-based flocculants. The core-shell nanostructure was highly stable in acidic stock solution and transformed to meso-scale coagulation nuclei in real surface water. In both jar and continuous-flow tests, HOC-M was superior over conventional flocculants in removing many contaminants (turbidity, UV254, and DOC: >95%; TP and NO3-N: >90%; trace pharmaceuticals [initial concentration: 100 ng/L]: >80%), producing flocs with better structural and dewatering properties, and lowering the environmental risk of metal leaching. The rationally designed nanoflocculants have large application potential, as a solution to increasing public concern about micro-pollutants and increasing water quality requirements. |
topic |
environmental chemical engineering surface chemistry environmental science environmental chemistry water resources engineering |
url |
http://www.sciencedirect.com/science/article/pii/S2589004221004594 |
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