Journal
JOURNAL OF CLEANER PRODUCTION
Volume 358, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2022.132046
Keywords
Sulfonated polymeric microspheres; Heavy metal; Atrazine; Simultaneous adsorption; Adsorptive filtration; Synergistic adsorption mechanism
Categories
Funding
- National Natural Science Foundation of China [51608148]
- National Key Research and Devel-opment Program of China [2019YFD1100104]
- Hei-longjiang Touyan Innovation Team Program [2021TS16]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [LBH-Q18061]
- Postdoctoral Scientific Research Developmental Fund of Heilongjiang Province
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The combined pollution of surface water by organic and inorganic contaminants is a concerning environmental issue. This study successfully developed sulfonated polyacrylate-divinylbenzene (PADVB) microspheres for the efficient removal of organic pollutants and heavy metal ions from water. The research revealed the multi-mechanism adsorption effects, such as electrostatic attraction and complexation, contributing to the simultaneous adsorption of ATZ and heavy metal ions. These findings expand our understanding of the adsorptive behaviors between organic pollutants and heavy metal ions.
The combined pollution of surface water caused by organic and inorganic contaminants has become an environmental issue worthy of attention. Adsorption has been acknowledged as a practical and efficient water treatment process. However, the combined interactions between organic and inorganic pollutants on the adsorbents remain ambiguous. In this work, a novel multi-function sulfonated polyacrylate-divinylbenzene (PADVB) microspheres were rapidly and successfully prepared for removing organic pollutants and heavy metals ions from water. The theoretical maximum adsorption capacity of ATZ and Pb(II) by sulfonated PADVB was calculated as 280 mg g(-1) and 163 mg g(-1), respectively. Additionally, dynamic adsorption based on an adsorptive-filtration reactor combined with in-situ regeneration was equipped, which proved to be effective and practical for the removal of combined pollution of trace contaminants from natural water. The simultaneous adsorption of ATZ and heavy metal ions could be attributed to the combined effects of multiple adsorption mechanisms, such as electrostatic attraction, complexation, Bronsted acid-base interaction, hydrogen bonds, and pi-pi interactions. Besides, the complexation between ATZ and heavy metal ions was confirmed by batch adsorption experiments and multiple characterization techniques, which play an important role in the synergistic interactions. In the binary adsorption systems, the heavy metal ions acted as a connector between ATZ and the surface of the microspheres through complexation, which could partly offset the competition of adsorptive binding sites. This work provided a promising adsorptive-filtration reactor to recycle and reuse powder adsorbent for solving the trace-level combined pollution in the environmental water and expanded the insights of adsorptive behaviours between organic pollutants and heavy metal ions.
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