Selective Separation of Cu (II) and Cd (II) from Aqueous Solution by Shear Induced Dissociation and Ultrafiltration Using Rotating Disk Membrane

Shuyun Tang, Yunren Qiu

Abstract

Selective separation of Cu (II) and Cd (II) from aqueous solution by shear induced dissociation and ultrafiltration have been investigated using rotating disk membrane (RDM) and polyacrylic acid sodium (PAAS) as complexing agent. The shear rate distribution on the membrane surface has been calculated at a certain rotating speed. The polymer-metal complex can dissociate when the shear rate exceeds the critical shear rate (γc), the smallest shear rate at which the polymer-metal complex starts to dissociate. The difference of the critical shear rates of the polymer-metal complexes can be used to separate different metal ions from aqueous solution. The critical shear rate of PAA-Cd complex (γc,Cd) is greater than that of PAA-Cu complex (γc,Cu) at pH 6.0. Cu (II) and Cd (II) can be separated when shear rate is greater than 8.0×104 s-1 at pH 6, P/M 27.5. Moreover, the regeneration of PAAS has been also finished at γ>1.31×105 s-1. Compared with the acidification, shear induced dissociation, is a novel and green technology for recovery of heavy metal ions and polymer from aqueous solutions without the consumption of acid and alkali.

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Paper Citation


in Harvard Style

Tang S. and Qiu Y. (2018). Selective Separation of Cu (II) and Cd (II) from Aqueous Solution by Shear Induced Dissociation and Ultrafiltration Using Rotating Disk Membrane.In The Second International Conference on Materials Chemistry and Environmental Protection - MEEP, ISBN 978-989-758-360-5, pages 319-322. DOI: 10.5220/0008189503190322


in Bibtex Style

@conference{meep18,
author={Shuyun Tang and Yunren Qiu},
title={Selective Separation of Cu (II) and Cd (II) from Aqueous Solution by Shear Induced Dissociation and Ultrafiltration Using Rotating Disk Membrane},
booktitle={The Second International Conference on Materials Chemistry and Environmental Protection - MEEP,},
year={2018},
pages={319-322},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008189503190322},
isbn={978-989-758-360-5},
}


in EndNote Style

TY - CONF

JO - The Second International Conference on Materials Chemistry and Environmental Protection - MEEP,
TI - Selective Separation of Cu (II) and Cd (II) from Aqueous Solution by Shear Induced Dissociation and Ultrafiltration Using Rotating Disk Membrane
SN - 978-989-758-360-5
AU - Tang S.
AU - Qiu Y.
PY - 2018
SP - 319
EP - 322
DO - 10.5220/0008189503190322