Application of different redox mediators induced bio-promoters to accelerate the recovery of denitrification and denitrifying functional microorganisms inhibited by transient Cr(VI) shock
文献类型：期刊论文
| 作者 | Wang, Qian; Zhao, Yingxin; Zhai, Siyuan; Liu, Duo; Zhou, Xu; Wang, Yue; Cabrera, Jonnathan; Ji, Min |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2021-12-15 |
| 卷号 | 800页码:- |
| 关键词 | MCH-La(OH)(3)-EW Low strength phosphate Adsorption performance Regeneration Mechanism Real water treatment |
| ISSN号 | 0048-9697 |
| 英文摘要 | Phosphate 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. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/46886]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, 18 Shuangqing Rd, Beijing 100085, Peoples R China 2.Ninth Waterworks Beijing Waterworks Grp Co Ltd, Beijing 100012, Peoples R China 3.Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia 4.Tianjin Univ, Sch Environm Sci & Engn, 135 Yaguan Rd, Tianjin 300350, Peoples R China |
| 推荐引用方式 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):-. |
入库方式： OAI收割
来源：生态环境研究中心
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