[...]... Physical Properties of Adsorbents m 09 3 m d ?hl+ W O d O O O m o o m o m 0 m d P 1 m O c o m m m m m m 09090909090909 d- c.1 W c.1 0 0 0 0 0 0 0 o 0 $ I : a N v , 3 C m 03 c7 co m 0 0 PI P - h h a , Y 23 24 0 Q\ 2 0 W 0 0 09 O 0 0 W \Dm - e! ! N - m m h l m - 0 c ! h x m Chapter 2 N r-r? ? r 0 l d m r-+ w w o 2: Physical Properties of Adsorbents h r= W 0 0 0 b 25 26 Chapter 2 w loo woo w lo o rt" w w m r-r-... 2 N r-r? ? r 0 l d m r-+ w w o 2: Physical Properties of Adsorbents h r= W 0 0 0 b 25 26 Chapter 2 w loo woo w lo o rt" w w m r-r- Nr- o w w w lo r- lo w Z-a-b m m m Physical Properties of Adsorbents lo m m t " e +-, d W t" r- w lo z 9 O Y I- e Y low" wc4wlololom -( wt" w r-mac1t" dloChN00 C I rr z w F? 2 l m o 27 ... solubility of many other materials Chemical dissolution of oxides has been reviewed by Blesa et al [2, 31 It should be emphasized that points of zero charge of relatively soluble materials, e.g BaO and SrO have been reported in the literature Gel like materialscontaining sufficient amount of waterare much more penetrable to ions than crystalline materials Materials penetrable to ions are often characterized... interest, and in view of broad spectrum of goals and viewpoints of the authors of the cited publications and of potential readers of this book, it is not easy to organize the entire material The grouping of data i ” ” - is: 3 Introduction is based on conceptsof colloid chemistry Many results are compiled in tabular form They are sorted by the formal chemical formula of the adsorbent and then by the adsorbate... results, e.g Hoffmeister’s series, studies of uptake of ions from solution, and even shifts in the isoelectric point IEP and PZC suggest non-electrostatic interactions of these ions and surfaces of materials, especially at high concentrations and far from the PZC These results are shown and briefly discussed next The compilation of PZC in this book involves results obtained in temperature range 1 5-4 0T In... using the methodsand terminology of ion-exchange, i.e by their exchange capacities and diffusion coefficients of particular ions, andthe affinity of particularions to such materials is expressed in terms of selectivity coefficients Misak [4] reviewed sorptionproperties of hydrous oxides from such a perspective, but in some other publications the uptake of ions by gel like materials is treated asadsorption.It... obtained for dry surfaces Inparticular,certainadsorbates considered show substantialvapor pressure at room temperature, and sorption of their vapors has been studied Such results, albeit related to sorption of the same species from aqueous solution are beyond the scope of the book Witha huge amount of information, that has been published onsorption properties of materials of interest, and in view of broad... presents data onpoints of zero charge obtained by different methods in the absence of strongly adsorbing species, usually at low concentrations (on the order of IO-’ mol dm-3) of inert electrolytes, i.e alkali nitrates V, chlorates VI1 and halides Also corresponding salts of ammonium its and short-chain tetraalkyl derivatives are considered as inert electrolytes The definition of the zero point is anything... inorganic materials were also used to describe sorption properties of organic materials A few examples are presented in Chapter 6 The phenomena presented in this book were discussed in many reviews For example, Schwarz [ 131 discussed methods used to characterize the acid base properties of catalysts The review on sorption on solid - aqueous solution interface by Parks [ 141 includes also principles of surface... Toney and J M Zachara, Chem Rev 99: 7 7-1 74 (1999) W Stumm Colloids Surf A 73: 1-1 8 (1993) P W Schindler and W Stumm In Aquatic Surface Chemistry: Chemical Processes at the Particle-Water Interface (W Stumm, ed.) John Wiley 1987, pp 8 3-1 10 W Schindler, Oster Chem Z 86: 141 (1985) 2 Physical Properties of Adsorbents I CRYSTALLOGRAPHIC DATA The surface properties of various phases corresponding to the . up-to-date compilation of values of the points of zero charge of various materials obtained by different methods is presented. These materials range from simple to very complex and from well-.