Document Detail


Effect of low molecular weight organic acids on phosphorus adsorption by ferric-alum water treatment residuals.
MedLine Citation:
PMID:  22192585     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Effects of low molecular weight organic acids (LMWOAs; citric acid, oxalic acid and tartaric acid) on phosphorus (P) adsorption by ferric-alum water treatment residuals (FARs) were studied. Both batch and column experiments indicated that the effects of LMWOAs on P adsorption were closely related to adsorption time. Initially, all acids presented inhibitory function on P adsorption. The inhibition became weaker with time, eventually promoting P adsorption for citric acid and tartaric acid. In the column experiment with a 61-day duration, high P adsorption rates (>55%) were observed for the test groups containing citric acid and tartaric acid. Interestingly, higher pH likely enhanced P adsorption with the effects of LMWOAs and a distinct relationship between LMWOAs' effects on P adsorption and their concentrations was not observed. Moreover, fractionation of the adsorbed P from the FARs demonstrated that oxalic acid reduced P adsorption capacity, while citric acid and tartaric acid increased. Based on the forms of Fe and Al existing in the FARs and Fourier transform infrared spectroscopy analyses, LMWOAs can promote P adsorption through activating crystalline Fe/Al and preventing crystallization of amorphous Fe/Al to increase P adsorption sites, and can also inhibit P adsorption by competition with adsorption sites.
Authors:
Changhui Wang; Ziyuan Wang; Lu Lin; Binghui Tian; Yuansheng Pei
Related Documents :
2093005 - Influence of some growth promoting substances on multiplication of plasmodium falciparu...
22198865 - Solid-state fermentation of mortierella isabellina for lipid production from soybean hull.
21905655 - Capillary electrophoresis of free fatty acids by indirect uv detection: application to ...
7460875 - Effects of exogenous materials on pollen tube growth in lilium longiflorum pistils.
24419775 - Some quantitative effects of indoleacetic acid on the wood production and tracheid dime...
2187775 - Evaluation of olestra in short-term genotoxicity assays.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-12-7
Journal Detail:
Title:  Journal of hazardous materials     Volume:  -     ISSN:  1873-3336     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Affiliation:
The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing, PR China.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Preparation and mechanism of the sintered bricks produced from Yellow River silt and red mud.
Next Document:  Decomposition of 3-chlorophenol on nitrogen modified TiO(2) photocatalysts.