Hidrológiai Közlöny 1973 (53. évfolyam)

3. szám - Dr. Bozzay Józsefné: Mikroszennyezések eltávolítása aktívszén adszorpcióval és klórdioxidos oxidációval

116 Hidrológiai Közlöny 1973. 3. sz. Dr. Bozzay József né: Mikroszennyezések eltávolítása [14] Hager D. G.—Fulker Ti. I).

: Adsorption and filtration with granular activated carbon. Reprinted from the Journal of the Society for Water Treatment and Examination, Vol. 17. 1968. [15] Cahen J. F.: Traitement des eaux residusires de nitration avec charbon actif en grains Pittsburgh. ,,Technique de l'eau et de Vassainisement"

, 3, 3, marzo 1969. [16] Schenk P.: Die Wasseraufbereitungsanlage des Wasserwerkes Düsseldorf, Am Staad. Gas- u. Wassenach, 1962. 103, 791—8. [17Meinck F. und Spaltenstein F.: Abwässer der Kohleveredlungsindustrie und Trinkwasserversorgung. Ges.-Ing. 68 (1947), S. 7. [18] Burtscheil, Ft. H. und Ttose A

.. Chlorderivate lies Phenols, Die Geschmack und Geruch verursachen. ,/. A WW A 51 (1959), Nr. 2, S. 205. [19] Holluta, J. und Haberer K.: Uber die Geruchsentwicklung bei der Chlordioxidbehandlung phenolhaltiger Wässer, gwf 98 (1957) H. 22, S. 552. [20] Thielemann H.: Fenollal szennyezett ivó- és felszíni vizek klórdioxid kezelése. GesundheitsIngenieur, 1971. október 10. (92. évf.) YflajieHHe MMKpo3arpn3HenHH c aacopnutieü aKTHBHoro yrJifl H XAOPABYOKHCHBIN 0KHCJienn,ar,i JI-p Bo33au, Ft. OßecneqeHHe Bee pacTvmHx noTpeöHocTeií B NHTBEBOIÍ BO^e He B03M0>KH0 (5e3 HCn0JTb30BaHHH riOBepXHOCTHblX BOA, ocoöeHHo B CTpaHax c GoAbinon rycTOTbi Hacejreimí). CoBpeMCHHaH npoMbiuujieHHocTb, H B nepByio onepeAb XHMHHeCKa« npOMblUlJieHHOCTb H3r0T0BJlfleT B pa3Hüo0pa3HOM cocTaBe rai<ne npo^yKTbi, oTßpocbi or KOTopwx oneHb rpy^Ho yaajiHTb H3 CTO'IHI,IX BOA, H Aawe B HeőojibiuoM KOJIHMeCTBe npHMIIHJUOT 3aÖ0Ty Itpn HCn0JIb30BaHIlH 110BepxHocTHbix BOA AAA uejieií BOAOCHaöJKenHa. 3TH OT6pOCbl H33bIBaH

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)iueíí MapraHuoBKH H AJIH YAAAEHHFL HHTpaTa Ha OHHCTHOX v'CTaHOBKax. fljisi i'AaAeHHfl MHKpo3arpH3HHTeAeii nyTeiw oKHCJieHHH — Kai< BbiTeKaeT H3 jiHTepaTypHbix AaHHbix — xopouuiM MeTOI OM ÍIBAHeTCH XAOpAByOKHCHOe OKHCAeHHe. Xopoiiine PE3YJIBTATH 6MAH NOJIYHEHU c KOMÍIHHHPOBaHHoii TexHOAorHefi OIHCTKH BOAM — XJIOPAßYOKHCHOE oKHCAenne h (J)HAbTp c aKTHBHbiM yrAeM — Ha noBepxH0CTH0H OMHCTHTeAbHOii CTaHLJHH B TOPOAE TopHHO Ha p. no (IdTaAHH). Removal of micro-pollutants by active-carbon adsorption and oxidation with chlorine dioxide By Dr. Bozzay Józsefné Ever increasing water demands are impossible to meet, especially in densely populated countries, unless resort is made to surface water. An increasing variety is, however, produced by modern industry, and especially in the chemical industry, of substances the wastes of which can be removed from the effluents not at all, or with considerable difficulties only. Even small concentrations of these substances may severely restrict I he use of surface waters as a source of domestic supply. These substances are referred to as micro-pollutants. At the present state of knowledge the current treatment methods are unsuited for removing the micropollutants, and thus supplementary treatment is necessary. These supplementary unit operations may involve adsorption techniques, oxidation techniques, and the combinations thereof. Of the adsorption techniques the use of activated carbon has gained recently growing significance in domestic water supply. On the basis of the physico-chemical adsorption theories thej optimal technology of drinking water treatment is controlled, depending on the properties of the pollutants to be removed, by the state-equations. In other words, the physical structure and chemical properties of the active carbon to be used are determined by the molecular weight., structure, concentration, solubility and relative temperature of the substance to be removed. Once an active carbon of particular physical structure and chemical propert ies has been adopted, the thickness of the filter layer, the critical depth of the filter bed, the length of runs between backflushing operations and the preferable technology thereof can be determined for optimum results. In current practice active carbon is used in water treatment in powdered form and in granular form as filter material. In water treatment practice active carbon filters have been reported to be effective, beyond the adsorption of micro-pollutants, also in retaining the suspended solids using combined filtration, in the catalytic reduction of permanganate originating in de-manganizing with the help of ozone, as well as in the removal of nitrates at wastewater treatment plants. On the basis of data published in the literature, oxidation with the help of chlorine dioxide appears to be highly successful for the removal of micro-pollutants by oxidation methods. A water treatment technology involving active carbon filters combined with oxidation using chlorine dioxide is used with excellent results at the surface-water works along the Po river at Torino, Italy.