Humic acid potentiometric response patterns: out-of-equilibrium properties and species distribution modeling
نویسندگان
چکیده
منابع مشابه
Spectroscopic and potentiometric studies on derivatized natural humic acid.
Isolated soil humic acid (HA) and commercial Aldrich HA were derivatized by esterification with methanol-thionyl and acetylation with acetic anhidride, in order to obtain derivatives with selectively blocked carboxyl and phenol groups, respectively. Results obtained by FT-IR spectroscopy and potentiometry show that the methanol-thionyl procedure is a selective, specific and efficient route for ...
متن کاملFluctuations and response out - of - equilibrium
Statistical mechanics concentrates on deriving, correcting and extending thermodynamic treatments of multicomponent systems. Passing via different levels of mesoscopic descriptions it builds bridges between more unique and fundamental microscopic laws and the plurality of macroscopic phenomena. In the absence of a well understood nonequilibrium thermodynamics, we can still try to guess from mic...
متن کاملsome properties of fuzzy hilbert spaces and norm of operators
in this thesis, at first we investigate the bounded inverse theorem on fuzzy normed linear spaces and study the set of all compact operators on these spaces. then we introduce the notions of fuzzy boundedness and investigate a new norm operators and the relationship between continuity and boundedness. and, we show that the space of all fuzzy bounded operators is complete. finally, we define...
15 صفحه اولA direct potentiometric titration study of the dissociation of humic acid with selectively blocked functional groups
A direct potentiometric titration method was applied to commercial and soil humic acids in order to determine their carboxyl and phenol group concentrations and apparent and intrinsic pK. In that context, acid-base properties of humic acids are interpreted by selective blocking of carboxylic and phenolic groups by esterification and acetylation. Differences in underivatized and derivatized HA’s...
متن کاملInterfacial and rheological properties of humic acid/hematite suspensions.
This work deals with the effect of humic acid (HA) adsorption on the interfacial properties, the stability, and the rheology of aqueous iron oxide (hematite) suspensions. It is first of all demonstrated that HA effectively adsorbs onto hematite, mainly at acid pH. Since the charge of the HA chains is negative, it will be electrostatically attracted to the hematite surface below the point of zer...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemical and Biological Technologies in Agriculture
سال: 2015
ISSN: 2196-5641
DOI: 10.1186/s40538-015-0042-4