Ultrafiltration in producing drinking water from humic ground waters

Alborzfar, Maryam; Grøn, C.; Jonsson, Gunnar Eigil

doi:10.1016/0160-4120(94)90128-7

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Because of this, we investigated the effect of secondary chlorination on the formation of DBPs in this system. We also investigated the effect of ultrafiltration (prior to treatment with TiO 2 /UV), since ultrafiltration has been shown to remove DBP precursor material and microorganisms ( − ).…”

Section: Introductionmentioning

confidence: 99%

Identification of TiO₂/UV Disinfection Byproducts in Drinking Water

Richardson¹,

Thruston²,

Collette³

et al. 1996

Environ. Sci. Technol.

108

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Due to concern over the presence of trihalomethanes (THMs) and other chlorinated byproducts in chlorinated drinking water, alternative disinfection methods are being explored. One of the alternative treatment methods currently being evaluated for potential use with small systems (less than 3300 people) is titanium dioxide (TiO 2 ) photocatalysis. Using a combination of unconventional GC/MS and GC/FT-IR techniques, we identified organic disinfection byproducts (DBPs) formed by photocatalytic treatment of water with TiO 2 and ultraviolet (UV) light. The identifications also reflect the effects of ultrafiltration prior to treatment with TiO 2 /UV as well as secondary chlorination. Only a single organic DBP (tentatively identified as 3-methyl-2,4-hexanedione) was observed in ultrafiltered raw water treated with TiO 2 / UV alone. When chlorine was used as a secondary disinfectant (following treatment with TiO 2 /UV), several chlorinated and brominated DBPs were formed, among them some halomethanes and several halonitriles. Most of these halogenated DBPs were the same as those observed when chlorine was used as the sole disinfectant. However, one byproduct, tentatively identified as dihydro-4,5-dichloro-2(3H)furanone, was formed only by a combination of TiO 2 /UV and chlorine disinfection. Although many chlorinated DBPs were produced when chlorine was used as a secondary disinfectant, the number and concentration of these chlorinated DBPs were lower than when chlorine was used as the sole disinfectant.

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Section: Introductionmentioning

confidence: 99%

Identification of TiO₂/UV Disinfection Byproducts in Drinking Water

Richardson¹,

Thruston²,

Collette³

et al. 1996

Environ. Sci. Technol.

108

View full text Add to dashboard Cite

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“…The efficiency of coagulation depends upon the raw water composition (e.g., the type of humic substances, ion concentrations, and pH). As an alternative, membrane filtration processes have been studied in humic ground water treatment (Alborzfar et al, 1994, 1998).…”

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confidence: 99%

Artificial Recharge of Humic Ground Water

Alborzfar¹,

Villumsen²,

Grøn

2001

J of Env Quality

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The purpose of this study was to investigate the efficiency of soil in removing natural organic matter from humic ground waters using artificial recharge. The study site, in western Denmark, was a 10,000 ml football field of which 2,000 m2 served as an infiltration field. The impact of the artificial recharge was studied by monitoring the water level and the quality of the underlying shallow aquifer. The humic ground water contained mainly humic adds with an organic carbon (OC) concentration of 100 to 200 mg C L(-1). A total of 5,000 mS of humic ground water were sprinkled onto the infiltration field at an average rate of 4.25 mm h(-1). This resulted in a rise in the water table of the shallow aquifer. The organic matter concentration of the water in the shallow aquifer, however, remained below 2.7 mg C L(-1). The organic matter concentration of the pore water in the unsaturated zone was measured at the end of the experiment. The organic matter concentration of the pore water decreased from 105 mg C L(-1) at 0.5 m to 20 mg C L(-1) at 2.5 m under the infiltration field indicating that the soil removed the organic matter from the humic ground water. From these results we conclude that artificial recharge is a possible method for humic ground water treatment.

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