| Home | E-Submission | Sitemap | Contact Us |  
Environmental Engineering Research 2001;6(2): 91-98.
IMPACT OF pH AND CHELATORS ON FE(III) HYDROXIDE SOLUBILITY IN SEAWATER
Bong-Hun Lee1, and Heung-Jai Park2
1Department of Chemistry, Pusan National University, Pusan 609-735, Korea
2Department of Environmental Science, Inje University, Kimhae 621-749, Korea
Corresponding Author: Heung-Jai Park ,Tel: +82-55-320-3418, Fax: +82-55-320-3418, Email: envphj@ijnc.inje.ac.kr
Received: December 8, 2000;  Accepted: May 6, 2001.
Share :  
ABSTRACT
In seawaters and in the UV-irradiated seawaters of Pusan, Korea, iron solubilities of Fe(lII) hydroxide over a pH range of 5.51—8.15 at 20°C were determined. At pH range of 5.51—7.33, only the Fe(OH)2+ ion was important species. The calculated solubility products, log Ks, for seawaters were 4.2—4.5. The solubilities within the pH range of 7.51—8.15 were relatively independent of pH and aging time. UV irradiation reduced the solubility to <0.1 nM. The vertical profiles of ambient Fe(III) solubility in seawaters had the following features in common; solubility in the surface mixed layer was high and variable (0.35 — 0.48 nM); solubility minima (0.19 — 0.30 nM) occurred at a depth of 100 — 500 m. These results suggested that natural organic Fe(IIl) chelators existed in high concentration and controlled the dissolved iron concentration in seawaters.
Keywords: chelators | Fe(III) hydroxide | seawater | solubility
TOOLS
PDF Links  PDF Links
Full text via DOI  Full text via DOI
Download Citation  Download Citation
  E-Mail
Share:      
METRICS
1,067
View
3
Download
Editorial Office
464 Cheongpa-ro, #726, Jung-gu, Seoul 04510, Republic of Korea
TEL : +82-2-383-9697   FAX : +82-2-383-9654   E-mail : eer@kosenv.or.kr

Copyright© Korean Society of Environmental Engineers. All rights reserved.        Developed in M2community
About |  Browse Articles |  Current Issue |  For Authors and Reviewers