Elimination of humic acid in water: comparison of UV/PDS and UV/PMS.

ABSTRACT: Humic substances are polyelectrolytic macromolecules; their presence in water leads to many environmental problems without effective treatment. In this work, the elimination of humic acid (HA), a typical humic substance, has been examined through ultraviolet (UV) activation systems in the presence of peroxydisulfate (PDS) and peroxymonosulfate (PMS), respectively. The results indicated that 92.9% and 97.1% of HA were eliminated with rate constants of 0.0328 ± 0.0006 and 0.0436 ± 0.0011 min^-1 with 180 and 60 min treatment times at pH 6 and 3 when adding 3 and 1 mmol L^-1 oxidant during UV/PDS and UV/PMS, respectively; the corresponding electric energies per order were 0.0287 and 0.0131 kW h m^-3. The HA removal was systematically investigated by varying differ

SUBMITTER: Tang S 

PROVIDER: S-EPMC9053580 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature