Click on image to view larger version.
Fig. 4. 2H nuclear magnetic resonance (NMR) spectra of d5–pyridine and deuterated water at natural abundance (the most upfield-shifted peak) in aqueous suspensions of untreated and NaOH-treated WDCs at different pH values. (a) untreated at pH 4 (
, ß, and water). (b) untreated at pH 6 (unresolved , ß, and water). (c) untreated at pH 7 (unresolved , ß, and water). (d) untreated at pH 9 (, 
, ß, and water). (e) treated at pH 4 (, ß, and water). (f) treated at pH 6 (, ß, and water). (g) treated at pH 7 (, ß, and water). (h) treated at pH 9 (, , ß, and water).
