<abstract xmlns="http://www.w3.org/1999/xhtml">Palygorskite was applied in complexation-ultrafiltration treatment of heavy metals in wastewater under different pH and ionic strength. The results indicated that the rejection of heavy metals increased significantly with pH value, and decreased slightly with an increase of ionic strength of Na+ and Cl–. A certain concentration of NaCl significantly reduced the rejection rate of Cu2+. The rejection of Cu2+, Zn2+ and Cd2+ could reach over 86.8%, 93.6% and 93.7% at pH of 7 and 0.1 mol/L NaCl. The rejection of heavy metals was severely affected by low molecular weight competing complexing agents and the effect of sodium tartrate was greater than triethanolamine. In the presence of sodium tartrate, the rejection of Cu2+, Zn2+ and Cd2+ could arrive over 81.4%, 57.6% and 60.5% at pH of 7 in 20 min. Palygorskite was offered a potential complexing agent for the removal of heavy metals in wastewater at the complexation-ultrafiltration process.</abstract>

Palygorskite was applied in complexation-ultrafiltration treatment of heavy metals in wastewater under different pH and ionic strength. The results indicated that the rejection of heavy metals increased significantly with pH value, and decreased slightly with an increase of ionic strength of Na+ and Cl–. A certain concentration of NaCl significantly reduced the rejection rate of Cu2+. The rejection of Cu2+, Zn2+ and Cd2+ could reach over 86.8%, 93.6% and 93.7% at pH of 7 and 0.1 mol/L NaCl. The rejection of heavy metals was severely affected by low molecular weight competing complexing agents and the effect of sodium tartrate was greater than triethanolamine. In the presence of sodium tartrate, the rejection of Cu2+, Zn2+ and Cd2+ could arrive over 81.4%, 57.6% and 60.5% at pH of 7 in 20 min. Palygorskite was offered a potential complexing agent for the removal of heavy metals in wastewater at the complexation-ultrafiltration process.

Ultrafiltration treatment of wastewater contained heavy metals complexed with palygorskite

School of Environmental and Municipal Engineering

Gansu Hanxing Environmental Protection Co. Ltd.

Key Laboratory of Yellow River Water Environment in Gansu Province

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Palygorskite was applied in complexation-ultrafiltration treatment of heavy metals in wastewater under different pH and ionic strength. The results indicated...

Ultrafiltration treatment of wastewater contained heavy metals complexed with palygorskite

Published Online: Nov 26, 2020

Page range: 1 - 9

DOI: https://doi.org/10.2478/pjct-2020-0031

Keywords
palygorskite, heavy metals, ultrafiltration, complexation, pH, ionic strength

© 2020 Jun Ren et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Ultrafiltration treatment of wastewater contained heavy metals complexed with palygorskite

Published Online: Nov 26, 2020

Page range: 1 - 9

DOI: https://doi.org/10.2478/pjct-2020-0031

Keywordspalygorskite, heavy metals, ultrafiltration, complexation, pH, ionic strength

© 2020 Jun Ren et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
palygorskite, heavy metals, ultrafiltration, complexation, pH, ionic strength