Mihaela-Doina NICULESCU<br>Study on Chemically Modified Red Mud for Pollutants Capturing <br>from Industrial Effluents

Mihaela-Doina NICULESCU
Study on Chemically Modified Red Mud for Pollutants Capturing
from Industrial Effluents

Abstract:

This study demonstrates the ability of mineral complexes, resulting from chemical modification of red mud waste, of capturing various substances found in wastewaters from the preliminary operations of natural leather tanning process. Red mud is a waste of alumina manufacturing from bauxite using the Bayer process, containing a mixture of minerals with ion exchange properties. Experiments have revealed that, besides its intrinsic ability to capture ionic chromium from wastewater and sludge, the mineral complex of chemically modified and conditioned red mud has an affinity for other compounds found in effluents resulting from leather processing. The current study has shown that, by treating individual wastewaters from preliminary operations of leather tanning, using a mineral complex based on red mud, the phosphate content of washing, soaking, liming, and pickling wastewater can be reduced by 80-99%, depending on their pH, and sulphate content in the pickling float by 88%. Simultaneously, the possibility of reducing silicon content, which may be found in washing and soaking wastewaters, by 93%, while the presence of silicon in other wastewaters is insignificant. The transfer of these substances into the mineral complex is simple, effective, and reproducible. Keywords: wastewaters, mineral complex, multifunctional, red mud

Issue: 2014, Volume 65, Issue 11

Pages:

Download Pdf Article

This article is published under the Creative Commons Attribution 4.0 International License

<<<< back

PUBLISHING SECTION

Author Guidelines

* Paper Drafting

* Paper Template

* Ethical Statement

* Paper Submission

Ghidul Autorului (ro)

Open Access & Archiving Policy

Search Authors

LATEST NEWS
	NUMAR OMAGIAL PETRU PONI.. detalii
	Revista de Chimie - 70 de ani de aparitie neintrerupta.. detalii
	English-Romanian Dictionary for Mechanical Engineering (download pdf)