Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981
Alligator Rivers Region - Regional Surface Water Quality Monitoring, Volumes 1,2,3 (Plus draft)
Northern Territory. Department of Transport and Works. Water Division, Environmental Section
E-Publications; E-Books; PublicationNT; Report ; 49/1983
At head of title: Water Division, Dept. of Transport & Works, Northern Territory. "April 1983".
Water quality -- Northern Territory -- Alligator Rivers Region; Hydrology -- Northern Territory -- Alligator Rivers Region
Northern Territory Government
Report ; 49/1983
3 volumes. ; 30 cm
Attribution International 4.0 (CC BY 4.0)
Northern Territory Government
https://hdl.handle.net/10070/672725 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_1.pdf]; https://hdl.handle.net/10070/672727 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_2.pdf]; https://hdl.handle.net/10070/672729 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_3.pdf]
Technical Report WRD83049 Viewed at 14:07:10 on 29/07/2010 Page 27 of 440. I I I I I I I I I I I I I I I I I I I I Hydroxide Carbonate Bicarbonate Sulphate Chloride Fluoride 26. They may also be used as an indicator of seawater infiltration both directly and via groundwater. Together, as an indicator of hardness, they may work synergetically with other substances to increase or decrease toxicity, and will put stress directly on animal life. Any discharges from either mine sites or sewage effluents will have these as major consituents. They are simple, quick and cheap to analyse and no special preservation methods are required. The analyses of these involve titration to certain pH conditions, actually as part of the alkalinity titrations. Together they may indicate the alkalinity of the water and its buffering capacity. One of the main problems is the pH dependence of the titration, as pH of the solution may change on storage. Hydroxide and carbonate are rarely detected in the area, as the pH's are not high. Bicarbonate (and carbonate) may also give indications of the type of rocks groundwater is derived from, and bicarbonate may be used to calculate inorganic carbon. Sulphate is expected to be one of the major pollutants likely to be generated by uranium milling. It may also occur naturally via oxidation of sulphide. Analysis is fairly straight forward, although it may be quite involved at the low levels encountered in baseline studies. Samples do not degenerate on storage however sulphide and sulphite may be oxidised to sulphate on standing. It may also be found in groundwater, especially that derived from deep sources. Chlorine is expected to be used in sterilisation of water supplies, and may be detected in sewage and wastewater. It may also occur naturally through seawater infiltration into groundwater and surface water, ~~d also from rocks especially chlorite schists in the area. Analysis is simple, and no special preservation is required, however contamination from acid washed containers is possible. This may possibly be introduced into the environment via water supplies. It may occur naturally, particularly in association with granitic rocks. Its analysis is simple and straightforward with no special preservation required. As little or none was detected in initial sampling, the analysis was discontinued for subsequent samples.