HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (37) Citing Articles via Google Scholar Google Scholar Articles by Singh, S. P. Articles by Harris, W. G. Search for Related Content PubMed PubMed Citation Articles by Singh, S. P. Articles by Harris, W. G. GeoRef GeoRef Citation Agricola Articles by Singh, S. P. Articles by Harris, W. G. Related Collections Soil Mineralogy Industrial Waste Heavy Metals Soil Pollution Soil Chemistry

Heavy Metal Interactions with Phosphatic Clay

Sorption and Desorption Behavior

^a Soil Science Division, Univ. of Idaho, Moscow, ID 83844-2339
^b Soil and Water Science Dep., Univ. of Florida, Gainesville, FL 32611-0290

View larger version (19K): [in a new window]   Fig. 1. Langmuir sorption isotherms of Pb+2, Cd+2, and Zn+2 on phosphatic clay (A) and their linear fittings (B) after the transformation using the Langmuir equation.

View larger version (17K): [in a new window]   Fig. 2. Relationships between sorbed metals and final pH (A), and between sorbed metals and total Ca concentrations in the final solution (B) after 24 h of metal interaction with phosphatic clay.

View larger version (24K): [in a new window]   Fig. 3. X-ray diffraction patterns of phosphatic clay before Pb sorption (A) and after Pb sorption (B). Mineral abbreviations: s (smectite), pa (polygorskite), k (kaolinite), q (quartz), py (pyromorphite), and a (apatite).

View larger version (120K): [in a new window]   Fig. 4. Scanning electron microscopy (SEM) back scattered electron image (BSI) micrograph of pyromorphite in aqueous Pb-treated phosphatic clay showing cluster of lath-like pyromorphite crystals.

View larger version (129K): [in a new window]   Fig. 5. Energy dispersive X-ray spectroscopy (EDS) dot-mapping of pyromorphite particle in aqueous Pb-treated phosphatic clay. (A) Selected pyromorphite crystal. (B) Presence of Pb in pyromorphite. (C) Presence of P in pyromorphite. (D) Absence of Ca in pyromorphite.