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Application of different redox mediators induced bio-promoters to accelerate the recovery of denitrification and denitrifying functional microorganisms inhibited by transient Cr(VI) shock
Wang, Qian; Zhao, Yingxin; Zhai, Siyuan; Liu, Duo; Zhou, Xu; Wang, Yue; Cabrera, Jonnathan; Ji, Min
2021-12-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0048-9697
Volume800Pages:-
AbstractPhosphate is an important factor for the occurrence of surface water eutrophication, and is also a non-renewable resource which faces a potential depletion crisis. In this study, La(OH)(3) loaded magnetic cationic hydrogel composite MCH-La(OH)(3)-EW was used to absorb low strength phosphate in simulated water and real water. The adsorption amount of MCH-La(OH)(3)-EW was 39.14 +/- 0.31 mg P/g and the equilibrium time was 120 min at the initial phosphate concentration of 2.0 mg P/L. The adsorption process was a spontaneous endothermic reaction. MCH-La(OH)(3)-EW exhibited a high selectivity towards phosphate within pH of 4.0-10.0 or in the presence of coexisting ions (including Cl-, SO42-, NO3-, HCO3-, SiO32-) and humic acid. After 10 cycles of adsorption-desorption, the adsorption amount of regenerated MCH-La(OH())3-EW still remained at 63.4% of its maximum value. For the real water sample with phosphate concentration of 2.0 mg P/L, the phosphate removal efficiency could achieve 97.65-98.90% and the effluent turbidity was 2.10-4.27 NTU at the MCH-La(OH)(3)-EW dosage of 0.04 g/L. The adsorption mechanism analysis showed that both quaternary amine groups (-N+(CH3)(3)) and La(OH)(3) of MCH-La (OH)(3)-EW were involved in the process of phosphate adsorption. The electrostatic interaction between phosphate and -N+(CH3)(3) rapidly occurred at the initial stage of adsorption process, then the electrostatic absorbed phosphate migrated to La(OH)(3) on the surface of MCH-La(OH)(3)-EW via ligand exchange to form inner-sphere complex. This phenomenon was conducive to phosphate adsorption kinetics by MCH-La(OH)(3)-EW. (C) 2021 Elsevier B.V. All rights reserved.
Department中国科学院环境生物技术重点实验室
KeywordMCH-La(OH)(3)-EW Low strength phosphate Adsorption performance Regeneration Mechanism Real water treatment
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/46886
Collection中国科学院环境生物技术重点实验室
Affiliation1.Tianjin Univ, Sch Environm Sci & Engn, 135 Yaguan Rd, Tianjin 300350, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, 18 Shuangqing Rd, Beijing 100085, Peoples R China
3.Ninth Waterworks Beijing Waterworks Grp Co Ltd, Beijing 100012, Peoples R China
4.Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia
Recommended Citation
GB/T 7714
Wang, Qian,Zhao, Yingxin,Zhai, Siyuan,et al. Application of different redox mediators induced bio-promoters to accelerate the recovery of denitrification and denitrifying functional microorganisms inhibited by transient Cr(VI) shock[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,800:-.
APA Wang, Qian.,Zhao, Yingxin.,Zhai, Siyuan.,Liu, Duo.,Zhou, Xu.,...&Ji, Min.(2021).Application of different redox mediators induced bio-promoters to accelerate the recovery of denitrification and denitrifying functional microorganisms inhibited by transient Cr(VI) shock.JOURNAL OF HAZARDOUS MATERIALS,800,-.
MLA Wang, Qian,et al."Application of different redox mediators induced bio-promoters to accelerate the recovery of denitrification and denitrifying functional microorganisms inhibited by transient Cr(VI) shock".JOURNAL OF HAZARDOUS MATERIALS 800(2021):-.
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