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Adsorption removal of Ni(II) and phenol from aqueous solution by modified attapulgite and its composite hydrogel.
Environ Technol. 2019 Dec 27 [Online ahead of print]ET

Abstract

Attapulgite (ATP) and its organically modified products have been investigated for potential applications in environmental remediation. In this work, a variety of modifiers with different functional groups, including saturated sodium chloride solution (NaCl), cetyltrimethyl ammonium bromide (CTAB) and humic acid (HA), were used to treat attapulgite clay firstly, and then with the modified ATP as adsorbent and acrylamide (AAm) as monomer, polyacrylamide/modified attapulgite (PAAm/modified ATP) composite hydrogel which could adsorb heavy metal ions Ni(II) and organic pollutants phenol were synthesized. The structure of the raw ATP and modified ATP was specified with Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Transmission electron microscope (TEM). The experiments indicated that the modified ATP and composite hydrogel possessed good adsorption properties for Ni(II) ions and phenol. The adsorption capacity of PAAm/HA-ATP hydrogel for Ni(II) was as high as 64.3 mg/g, which was 194.9% of pure hydrogel. The adsorption isotherm of HA-modified ATP (HA-ATP) and adsorption kinetics of PAAm/HA-ATP composite hydrogel was particularly concerned. The adsorption isotherm equation fitted well on the Langmuir model and RL values ranged from 0.04 to 0.12 with different temperatures, indicated that the HA-ATP was a suitable adsorbent for adsorption of Ni(II) ions from wastewater. The obtained kinetics data for Ni(II) ions adsorption onto the PAAm/HA-ATP were described well by the pseudo-second-order model (R2 > 0.99). As for the adsorption of phenol, double-modification proved to be the most effective method, and its optimal adsorption capacity was obtained on PAAm/CTAB-HA-ATP hydrogel.

Authors+Show Affiliations

State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, People's Republic of China.State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, People's Republic of China.State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, People's Republic of China.State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, People's Republic of China.State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, People's Republic of China.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, People's Republic of China.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, People's Republic of China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31880961

Citation

Li, Jianjian, et al. "Adsorption Removal of Ni(II) and Phenol From Aqueous Solution By Modified Attapulgite and Its Composite Hydrogel." Environmental Technology, 2019, pp. 1-15.
Li J, Zheng Y, Feng X, et al. Adsorption removal of Ni(II) and phenol from aqueous solution by modified attapulgite and its composite hydrogel. Environ Technol. 2019.
Li, J., Zheng, Y., Feng, X., Lv, C., Liu, X., Zhao, Y., & Chen, L. (2019). Adsorption removal of Ni(II) and phenol from aqueous solution by modified attapulgite and its composite hydrogel. Environmental Technology, 1-15. https://doi.org/10.1080/09593330.2019.1703821
Li J, et al. Adsorption Removal of Ni(II) and Phenol From Aqueous Solution By Modified Attapulgite and Its Composite Hydrogel. Environ Technol. 2019 Dec 27;1-15. PubMed PMID: 31880961.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption removal of Ni(II) and phenol from aqueous solution by modified attapulgite and its composite hydrogel. AU - Li,Jianjian, AU - Zheng,Yiwei, AU - Feng,Xia, AU - Lv,Chao, AU - Liu,Xingtian, AU - Zhao,Yiping, AU - Chen,Li, Y1 - 2019/12/27/ PY - 2019/12/28/entrez PY - 2019/12/28/pubmed PY - 2019/12/28/medline KW - Attapulgite KW - Ni(II) KW - adsorption KW - composite hydrogel KW - phenol SP - 1 EP - 15 JF - Environmental technology JO - Environ Technol N2 - Attapulgite (ATP) and its organically modified products have been investigated for potential applications in environmental remediation. In this work, a variety of modifiers with different functional groups, including saturated sodium chloride solution (NaCl), cetyltrimethyl ammonium bromide (CTAB) and humic acid (HA), were used to treat attapulgite clay firstly, and then with the modified ATP as adsorbent and acrylamide (AAm) as monomer, polyacrylamide/modified attapulgite (PAAm/modified ATP) composite hydrogel which could adsorb heavy metal ions Ni(II) and organic pollutants phenol were synthesized. The structure of the raw ATP and modified ATP was specified with Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Transmission electron microscope (TEM). The experiments indicated that the modified ATP and composite hydrogel possessed good adsorption properties for Ni(II) ions and phenol. The adsorption capacity of PAAm/HA-ATP hydrogel for Ni(II) was as high as 64.3 mg/g, which was 194.9% of pure hydrogel. The adsorption isotherm of HA-modified ATP (HA-ATP) and adsorption kinetics of PAAm/HA-ATP composite hydrogel was particularly concerned. The adsorption isotherm equation fitted well on the Langmuir model and RL values ranged from 0.04 to 0.12 with different temperatures, indicated that the HA-ATP was a suitable adsorbent for adsorption of Ni(II) ions from wastewater. The obtained kinetics data for Ni(II) ions adsorption onto the PAAm/HA-ATP were described well by the pseudo-second-order model (R2 > 0.99). As for the adsorption of phenol, double-modification proved to be the most effective method, and its optimal adsorption capacity was obtained on PAAm/CTAB-HA-ATP hydrogel. SN - 1479-487X UR - https://www.unboundmedicine.com/medline/citation/31880961/Adsorption_removal_of_Ni(II)_and_phenol_from_aqueous_solution_by_modified_attapulgite_and_its_composite_hydrogel L2 - http://www.tandfonline.com/doi/full/10.1080/09593330.2019.1703821 DB - PRIME DP - Unbound Medicine ER -
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