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Facile synthesis of graphene oxide/palygorskite composites for Pb(II) rapid removal from aqueous solutions.
Water Sci Technol. 2019 Sep; 80(5):989-997.WS

Abstract

As a kind of earth-abundant and cheap natural clay mineral, palygorskite (Pal) was facilely modified by grafting with graphene oxide (GO) to fabricate GO/Pal composites for rapid removal of Pb(II) from aqueous solutions. The results of characterization confirmed that the GO/Pal composites were successfully grafted between GO sheets and Pal nanorods. The effects of pH, adsorbent dosage, adsorption time, initial Pb(II) concentration and temperature on the adsorption of Pb(II) onto the GO/Pal composites as adsorbents were systematically investigated. The maximum adsorption capacity over 106.6 mg/g was obtained within a short adsorption time of less than 1 h even at 298.15 K. The adsorption of Pb(II) was a fast process that more accurately followed the pseudo-second-order kinetic equation. This process also could be described better with the Langmuir equation model than the Freundlich model. The negative values of ΔG° and the positive values of ΔH° and ΔS° indicated that it was a spontaneous, endothermic and entropy-increasing adsorption process. Compared with pristine Pal and GO powders, such the GO/Pal composites as a cost-efficient and eco-friendly adsorbents could significantly improve the adsorption properties of Pb(II) and would have potential application in the industrial wastewater treatment for rapid removal of Pb(II).

Authors+Show Affiliations

Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Ave., Nanchang 330022, People's Republic of China E-mail: xlzhang@jxnu.edu.cn; xlzhang1980@gmail.com These authors contributed equally to this work.Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Ave., Nanchang 330022, People's Republic of China E-mail: xlzhang@jxnu.edu.cn; xlzhang1980@gmail.com These authors contributed equally to this work.Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Ave., Nanchang 330022, People's Republic of China E-mail: xlzhang@jxnu.edu.cn; xlzhang1980@gmail.com.Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Ave., Nanchang 330022, People's Republic of China E-mail: xlzhang@jxnu.edu.cn; xlzhang1980@gmail.com.Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Ave., Nanchang 330022, People's Republic of China E-mail: xlzhang@jxnu.edu.cn; xlzhang1980@gmail.com.Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Ave., Nanchang 330022, People's Republic of China E-mail: xlzhang@jxnu.edu.cn; xlzhang1980@gmail.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31746806

Citation

Zeng, Wen-Juan, et al. "Facile Synthesis of Graphene Oxide/palygorskite Composites for Pb(II) Rapid Removal From Aqueous Solutions." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 80, no. 5, 2019, pp. 989-997.
Zeng WJ, Wang CY, Wang YH, et al. Facile synthesis of graphene oxide/palygorskite composites for Pb(II) rapid removal from aqueous solutions. Water Sci Technol. 2019;80(5):989-997.
Zeng, W. J., Wang, C. Y., Wang, Y. H., Guo, H. M., Huang, Y., & Zhang, X. L. (2019). Facile synthesis of graphene oxide/palygorskite composites for Pb(II) rapid removal from aqueous solutions. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 80(5), 989-997. https://doi.org/10.2166/wst.2019.345
Zeng WJ, et al. Facile Synthesis of Graphene Oxide/palygorskite Composites for Pb(II) Rapid Removal From Aqueous Solutions. Water Sci Technol. 2019;80(5):989-997. PubMed PMID: 31746806.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Facile synthesis of graphene oxide/palygorskite composites for Pb(II) rapid removal from aqueous solutions. AU - Zeng,Wen-Juan, AU - Wang,Cai-Yun, AU - Wang,Yu-Hui, AU - Guo,Hong-Mei, AU - Huang,Yu, AU - Zhang,Xiao-Liang, PY - 2019/11/21/entrez PY - 2019/11/21/pubmed PY - 2019/11/22/medline SP - 989 EP - 997 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci. Technol. VL - 80 IS - 5 N2 - As a kind of earth-abundant and cheap natural clay mineral, palygorskite (Pal) was facilely modified by grafting with graphene oxide (GO) to fabricate GO/Pal composites for rapid removal of Pb(II) from aqueous solutions. The results of characterization confirmed that the GO/Pal composites were successfully grafted between GO sheets and Pal nanorods. The effects of pH, adsorbent dosage, adsorption time, initial Pb(II) concentration and temperature on the adsorption of Pb(II) onto the GO/Pal composites as adsorbents were systematically investigated. The maximum adsorption capacity over 106.6 mg/g was obtained within a short adsorption time of less than 1 h even at 298.15 K. The adsorption of Pb(II) was a fast process that more accurately followed the pseudo-second-order kinetic equation. This process also could be described better with the Langmuir equation model than the Freundlich model. The negative values of ΔG° and the positive values of ΔH° and ΔS° indicated that it was a spontaneous, endothermic and entropy-increasing adsorption process. Compared with pristine Pal and GO powders, such the GO/Pal composites as a cost-efficient and eco-friendly adsorbents could significantly improve the adsorption properties of Pb(II) and would have potential application in the industrial wastewater treatment for rapid removal of Pb(II). SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/31746806/Facile_synthesis_of_graphene_oxide/palygorskite_composites_for_Pb(II)_rapid_removal_from_aqueous_solutions L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2019.345 DB - PRIME DP - Unbound Medicine ER -