Transformation of Coordinate Forms of Phosphate Ad-sorbed on Goethite Snrfaces Under Conditions of Vary-ing pHEnglish Full Text
JIE XIAO-LEI; LIU FAN; ZHOU DAI-HUA; XU FENG-LIN; LI XUEYUAN andWANG DIAN-FEN(Hnazhong Agricultural University, Wuhan 430070 ( China)(Wuhan University of Technology, Wuhan 430O70 (China)
Abstract: X-ray photoelectron spectroscopy （XPS） and automatic titrimeter were nsed to study the relation be-tween pH and the transformation of the coordinate forms of P on goethite surfaces. The results showed thatfor a given P concentration, increasing the pH of suspension could cause a fast transformation of monodentatecomplexes of phosphate ions on goethite surfaces to binuclear ones. When lowering the PH, additional adsorp-tion of P occurred and the binuclear complexes reverted slowly to the monodentate ones. The dissociationand association of protons of the sorbed P caused by PH changes was considered to be a major reason lewtingto the transformation of the coordinate forms of P on the surfaces. The stability of binuclear surface complexof P was greater than that of monodentate complex. The possible reactions on the interface of goethite andsolutions with pH changes, and the reasons causing the different stabilities of the two coordinate P complexesare discussed in the paper.
- Series：
(D) Agriculture
- Subject：
Fundamental Science of Agriculture; Agronomy
- Classification Code：
S158
- Mobile Reading
Read on your phone instantly
Step 1Scan QR Codes
"Mobile CNKI-CNKI Express" App
Step 2Open“CNKI Express”
and click the scan icon in the upper left corner of the homepage.
Step 3
Scan QR Codes
Read this article on your phone.
- CAJ Download
- PDF Download
Download the mobile appuse the app to scan this coderead the article.
Tips: Please download CAJViewer to view CAJ format full text.
Download: 17 Pagecount: 7 Size: 225k
Citation Network
Related Literature
- Similar Article
- Reader Recommendation
- Associated Author