Work

On precipitated calcium and magnesium phosphates during synthetic hard waters softening by monosodium phosphate

Year: 2013

Type: article

Abstract: Phosphates were largely used to soften process or drinking waters. We have investigated the precipitation of Ca2+ and Mg2+ ions by monosodium phosphate dehydrate. Magnesium phosphate starts precipitating at pH0 = 8.6. The obtained solids have been identified by chemistry analyses, FTIR spectroscopy, X-ray diffraction, thermo gravimetric analysis (TGA) and differential thermal analysis (DTA). The solid phases obtained vary with pH0. It shows that DCPD (dicalcium phosphate dehydrate, ) precipitated within pH0 5 to 6.6, the TCP (tricalcic phosphate) and other apatite appear below pH0 = 7. The DCPD (dicalcium phosphate dihydrate, ,) precipitated was a pure product that can be used in nanotechnology and biomedical technology. We are presently testing these solids for natural waters defluoridation.

Source: Desalination and Water Treatment

DOI: 10.1080/19443994.2013.814000

Authors: A.S. Manzola, A. Mgaidi, M.S. Laouali, M. El Maaoui

Institutions: Université Abdou Moumouni, Tunis University, Tunis El Manar University

Language: English

Topic: Phosphorus and nutrient management

Subfield: Waste Management and Disposal

Field: Environmental Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: hybrid

Estimated APC paid: $1,000