Removal and recovery of organic pollutants from aquatic environment. 4. Separation of carboxylic acids from aqueous solution using crosslinked poly(4-vinylpyridine)

Microbial dissolution of calcite at T=28°C and ambient pCO2

“…(4) and (6) (Kawabata et al, 1981;Tung and King, 1994). This indicates that a fraction of lactate converts to lactic acid during the titration.…”

Investigating the differences in acid separation behaviour on weak base ion exchange resins

“…Wastewater streams containing low concentrations of acids are inevitably encountered in acid manufacturing plants, industries where acids are used as raw material or as catalyst, fermentation processes, metal plating industry, etc. Wastewater usually contains single or mixture of acids from 0.5 to 4%, depending on the source of generation (Katzen, Aries & Othmer, 1945;Othmer, 1958;Matsarenko, Lebedinskaya, Dudkova & Gushchina, 1969;Helsel, 1977;Ricker, Pittman & King, 1980;Wadekar and Sharma, 1981;Kawabata, Yoshida Jun-ichi & Tanigawa, 1981;Parulekar, Sharma, Joshi & Shah, 1982). Since, large volumes are to be treated that contain low concentrations of acids, ion exchange is most convenient method of treatment in many cases.…”

Adsorption of 5-sodiosulfoisophthalic acids from aqueous solution onto poly(2-vinylpyridine) resin

“…In the past decades, the use of polymeric adsorbents (namely, synthetic resins) for removal of organic pollutants is very important not only in the environmental protection but also in the resource reuse, because the adsorbents can be regenerated and the adsorbates can be recovered without chemical change [6,7]. In comparison to the traditional adsorbents such as activated carbon, cellulose, clay, and silica gel, polymeric adsorbents have the advantages of their feasible adsorption-regeneration properties and perfect mechanical stability.…”