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Design of the groundwater monitoring system based on the EU [European Union] Water Framework Directive
2005
Dalmacija, B.(Prirodno-matematicki fakultet, Novi Sad (Serbia and Montenegro). Departman za hemiju) E-mail:bozo@ih.ns.ac.yu | Becelic, M.(Prirodno-matematicki fakultet, Novi Sad (Serbia and Montenegro). Departman za hemiju)
The paper presents main recommendations for monitoring groundwater from the aspect of the EU Water Framework Directive. It is concerned with some basic notions of monitoring of quantitative and chemical state of groundwater. It is pointed out that the network of gauging stations must be planned for every catchment area, to ensure a holistic and all-encompassing survey of the chemical state of groundwater, and allow detection of long-term anthropogenic effects of pollution. In addition to usual numerical and graphical presentation, the state of groundwater quality should be also presented by colours: good state - green, bad state - red.
Show more [+] Less [-]Formation of ozonation byproducts in the groundwater subjected to preozonation and coagulation
2005
Agbaba, J.(Prirodno-matematicki fakultet, Novi Sad (Serbia and Montenegro)) E-mail:agbabaj@ih.ns.ac.yu | Dalmacija, B. | Klasnja, M. | Ivancev-Tumbas, I.
The work considers the effect of the ozonization process on the change of contents of natural organic matter (NOM) and formation of byproducts in the groundwater pretreated by preozonation (2.0 g O3/cubic m) and coagulation with polyaluminium-chlorosulfate (5 and 10 g Al/cubuc m). Experiments were carried out on a semi-industrial plant of capacity of 2 cubic m/h, using groundwater with a high content of NOM (5.1 mg/l TOC). It was found that in the course of ozonization NOM content shows a decrease (18-64%), as well as the potential of formation of trihalomethanes, PFTHM (12-59%), whereas content of aldehydes increases by 3.0-7.7 microgram/l, depending on the water pretreatment and applied ozone dose. It was found correlation between specific aldehyde content and decrease of the specific PFTHM (r=0.815-0.998).
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