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

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in JEQ 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 (35) Citing Articles via Google Scholar Google Scholar Articles by Wang, K. Articles by Xing, B. Search for Related Content PubMed PubMed Citation Articles by Wang, K. Articles by Xing, B. Agricola Articles by Wang, K. Articles by Xing, B. Related Collections Humic Substances Geochemical Processes Nuclear Magnetic Resonance, NMR Sorption/Exchange Soil Chemistry

Structural and Sorption Characteristics of Adsorbed Humic Acid on Clay Minerals

Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA 01003

View larger version (23K): [in a new window]   Fig. 1. Carbon-13 nuclear magnetic resonance (NMR) spectra: (A) solid-state NMR spectra of montmorillonite–humic acid (HA) complex; (B) rotor background spectrum; (C) differential spectrum between A and B (i.e., difference of free induction decay signals); (D) liquid-state NMR spectrum of the HA left in the solution after coating on montmorillonite; (E) solid-state NMR spectra of the HA left in solution after coating on kaolinite and freeze-drying; and (F) solid-state NMR of the source HA.

View larger version (17K): [in a new window]   Fig. 2. Phenanthrene sorption isotherms: (A) the source humic acid (HA); (B) montmorillonite and montmorillonite–HA complex at a HA to clay ratio of 1 to 5; and (C) kaolinite and kaolinite–HA complex at a HA to clay ratio of 1 to 5. The inserted graphs in (B) and (C) are the isotherms in linear scale of (B) and (C), respectively.