Preparation of basic yttrium carbonate for phosphate removal
Authors: Haran, M.J.; Wasay, S.A.; Tokunaga, S.
Source: Water Environment Research, Volume 69, Number 5, July/August 1997 , pp. 1047-1051(5)
Publisher: Water Environment Federation
Abstract:Removal of phosphate ions from aqueous solutions has been studied with basic yttrium carbonate (BYC) of different compositions prepared by homogeneous precipitation with yttrium chloride and urea. Higher carbonate content was obtained with higher concentration of urea. Removal of phosphate was significant at pH less than 12 and dependent on the composition of BYC. The possible mechanism for removal is ion exchange with carbonate or hydroxide groups between pH 7 and 12 and through complex formation of phosphate with yttrium ions and ion exchange between pH 2 and 6. The phosphate adsorption capacity of BYC prepared with a higher concentration of urea was higher than that of BYC prepared with a lower urea concentration. The removal of phosphate followed a Langmuir model. The BYC of higher carbonate content gave higher percentage removal in the pH range of 6 to 11. The high phosphate adsorption capacity of the compound can be attributed to its carbonate group content and surface area. The phosphate adsorption was not affected by F−, SO4 2−, NO3 −, Br−, and I− in the basic pH range.
Document Type: Research Article
Publication date: July/August 1997
- Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year. Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
- Editorial Board
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Membership Information
- Information for Advertisers
- WEF Bookstore
- ingentaconnect is not responsible for the content or availability of external websites