Tags

Type your tag names separated by a space and hit enter

Hexavalent chromium removal from aqueous solution by adsorption on aluminum magnesium mixed hydroxide.
Water Res. 2009 Jul; 43(12):3067-75.WR

Abstract

A series of sols consisting of aluminum magnesium mixed hydroxide (AMH) nanoparticles with various Mg/Al molar ratios were prepared by coprecipitation. The use of AMH as adsorbent to remove Cr(VI) from aqueous solution was investigated. Adsorption experiments were carried out as a function of the Mg/Al molar ratio, pH, contact time, concentration of Cr(VI) and temperature. It was found that AMH with Mg/Al molar ratio 3 has the largest adsorption efficiency due to the smallest average particle diameter and the highest zeta potential; AMH was particularly effective for the Cr(VI) removal in a pH range from acid to slightly alkaline, even though the most effective pH range was between 2.5 and 5.0. The adsorption of Cr(VI) on AMH reached equilibrium within 150 min. The saturated adsorption capacities of AMH for Cr(VI) were 105.3-112.0mg/g at 20-40 degrees C. The interaction between the surface sites of AMH and the Cr(VI) ions may be a combination of both anion exchange and surface complexation. The pseudo-second-order model best described the adsorption kinetics of Cr(VI) onto AMH. The results showed that AMH can be used as a new adsorbent for Cr(VI) removal which has higher adsorption capacity and faster adsorption rate at pH values close to that at which pollutants are usually found in the environment.

Links

Publisher Full Text

Authors+Show Affiliations

Li Y
School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China. yujiang@sdu.edu.cn
Gao B
No affiliation info available
Wu T
No affiliation info available
Sun D
No affiliation info available
Li X
No affiliation info available
Wang B
No affiliation info available
Lu F
No affiliation info available

MeSH

AdsorptionAluminum HydroxideChromiumDrug CombinationsMagnesium HydroxideWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19439337

Citation

Li, Yujiang, et al. "Hexavalent Chromium Removal From Aqueous Solution By Adsorption On Aluminum Magnesium Mixed Hydroxide." Water Research, vol. 43, no. 12, 2009, pp. 3067-75.
Li Y, Gao B, Wu T, et al. Hexavalent chromium removal from aqueous solution by adsorption on aluminum magnesium mixed hydroxide. Water Res. 2009;43(12):3067-75.
Li, Y., Gao, B., Wu, T., Sun, D., Li, X., Wang, B., & Lu, F. (2009). Hexavalent chromium removal from aqueous solution by adsorption on aluminum magnesium mixed hydroxide. Water Research, 43(12), 3067-75. https://doi.org/10.1016/j.watres.2009.04.008
Li Y, et al. Hexavalent Chromium Removal From Aqueous Solution By Adsorption On Aluminum Magnesium Mixed Hydroxide. Water Res. 2009;43(12):3067-75. PubMed PMID: 19439337.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Hexavalent chromium removal from aqueous solution by adsorption on aluminum magnesium mixed hydroxide. AU - Li,Yujiang, AU - Gao,Baoyu, AU - Wu,Tao, AU - Sun,Dejun, AU - Li,Xia, AU - Wang,Biao, AU - Lu,Fengjuan, Y1 - 2009/04/17/ PY - 2008/12/29/received PY - 2009/04/03/revised PY - 2009/04/07/accepted PY - 2009/5/15/entrez PY - 2009/5/15/pubmed PY - 2009/9/22/medline SP - 3067 EP - 75 JF - Water research JO - Water Res VL - 43 IS - 12 N2 - A series of sols consisting of aluminum magnesium mixed hydroxide (AMH) nanoparticles with various Mg/Al molar ratios were prepared by coprecipitation. The use of AMH as adsorbent to remove Cr(VI) from aqueous solution was investigated. Adsorption experiments were carried out as a function of the Mg/Al molar ratio, pH, contact time, concentration of Cr(VI) and temperature. It was found that AMH with Mg/Al molar ratio 3 has the largest adsorption efficiency due to the smallest average particle diameter and the highest zeta potential; AMH was particularly effective for the Cr(VI) removal in a pH range from acid to slightly alkaline, even though the most effective pH range was between 2.5 and 5.0. The adsorption of Cr(VI) on AMH reached equilibrium within 150 min. The saturated adsorption capacities of AMH for Cr(VI) were 105.3-112.0mg/g at 20-40 degrees C. The interaction between the surface sites of AMH and the Cr(VI) ions may be a combination of both anion exchange and surface complexation. The pseudo-second-order model best described the adsorption kinetics of Cr(VI) onto AMH. The results showed that AMH can be used as a new adsorbent for Cr(VI) removal which has higher adsorption capacity and faster adsorption rate at pH values close to that at which pollutants are usually found in the environment. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/19439337/Hexavalent_chromium_removal_from_aqueous_solution_by_adsorption_on_aluminum_magnesium_mixed_hydroxide_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(09)00240-1 DB - PRIME DP - Unbound Medicine ER -