Hidrológiai Közlöny 1947 (27. évfolyam)

5-8. szám - ÉRTEKEZÉSEK - JUGOVICS LAJOS: A torjai Büdöshegy hidrogeológiai viszonyai

102 HIDROLÓGIAI KÖZLÖNY XXVII. évi. 1847. 5—8. ssmm. luckily been very dry within the water coltecting area of tj-ie lake. On account of this the level of the water feli in spité of the isolated condition of the lake;'the level at Siófok was only 44 cm on November 1. February 1947 was especially rich in precipitation, an amount of precipitation A—5 times the average^fell upon the water collecting area of the lake, mostly in the state of snow. ' To this is due that, after tbis, immense auantity of snow had melted, ,suddenly

; a surplus of 600—650 millions of m

3 of water was coljected in the basin of the lake and not finding outiét inundated the areas of the Little, Balaton, the Balaton Groves and the Bav of Szigliget. The water surface of the lake has thus been increased by about one third of its for mer area and the state of the lake 100 years ago has been restored. As the lake is still. in an isolated state conditions of its water economy can be excellently studied. >< INDUSTRIAL UTILIZATION OF THE SÓSHARTYÁN IODIC—BROMIC SPRINGS. By Gy. SZABÓ. (Hungárián text on p. 66.1 D. C. 553.72(439.131) :661.46/.47 At Sóshartyán, County of Nógrád, water of 1.3% Na Gl, 70.7 mg/lit iodine and 126 mg/lit bromine content was opened^ up-for the commercial utilization o.f which the Author of this paper has worked out t w o technical processes. One of these was based ön coal firing, the other upon the utilization of natural gas. In case of coal firing steam of 12 atm. pressure^ is produced which drives a steam turbine, the Power of which is used for process machinery and lighting>: pumps, centrifuge, lighting; back pressure steam of 2 atm is used for concentrating salt water to 1.2 sp. gr. in a Weigand vacuum apparatus of 3 atms; gypsum, carbonates and silica here precipitated are separated in. a- centrifuge, salt is obtained in a fourth vacuum unit, from the residual mother lye iodine is precipitated. ' In case of natural gas firing, brine is evaporated in a furnace consisti'ng of a tower with double walls "ön to which the - prehe'ated brine is pumped tbrou.gh a specially 'constructed spray, while the hot ggses of combustrion mount upward in countercurrent from the combustion space. Brine is processed in quantities that the rate of evaporation obtained should yield optimum concentration of 1.2 sp. gr. Hereafter gypsum, carbonates and silica are separated by a centrifuge and concentrated brine is aspirajed into a Weigand vacuum unit heated by v*taste gases frbm the evaporator tower, mixéd with vapours. Salt here obtained is separated ffom the mother lye in g centrifuge. Iodine is precipitated from the'mother lye. For its iodin content Sóshartyán water ranks in second place among European iodic springs/ it is therefore fit for therapeutic purposes as a medicinái spring. An originál suggestion of the author is to utilize vapours from evaporators for heating* water for baths and to use condensed (distilled) water, in a unique way, for distilled water baths. In case of gas fii'ing th^s water would be saturated with carbonic acid. As the water in question could be marketed as medicinái water and is fit for the production of table salt with iodine, iodine and 'bromine contenj, of elementary iodine and of iodic Salts, and it makes alsó possible the installation öf a large spa, its industrial valorization ^ a lucrative propositiön. = • i V . ANALYTICAL DATA ON THERMAL SPRINGS OF BUDAPEST. By E. SCHULEK, D. Sc. and P. RÓZSA, D. Sc. (Hungárián text .with figs. and table on p. 69.) D. C. 543,35/.36:553.7(43y,. 151) Some.new and old analytical data concerning the •con)ent ot sulphide, fluóride and iodide of the thermal springs of Budapest have made desirable to control the ions mentióned above. However, it seemed to be necessary to determine thiosulphate alsó, because of incongruity of old and new'analytical results. For^the same" purpose it was necessary to make studies how^to collect water samples from thermal springs (temperature from '42.9° to 76.6°). We recommend for that purpose sampling bottles shown in Figures I—4. Their use (F.ig. 3'—4) needs somé explanatior). They should be evacuated by boiling of water and reagents acided (NaOH for determinatrön of S" and QOS together, HCI for determination of S" bnly, HsBOs for determination of S'20

s") and after cooling down shpuld be weighed. Determination of S" and COS dissolved in thermal wpter was done by'iodometry but using 0.01 n KH|J03)ü as an oxidizing agent the excess of which was titrated with. thiosulphate. If the sample was prepared with NaOH the whole axidizable sulphur was measured.

1 If HCI wps present most of COS escaped from oxidation. In isresence of H3BO3, H2S and COS can be expelled by a current of CO2 or by boiling oüt the same. Thereafter S2O3" can be measured. The determination of fluorine was ^onnected' with that of boron. Weighed and álkaline made samples of thermal waters were evaporhted to dryness. The residue was taken up in water, neutralized with HCI. The solution (10 ml) was brought in the dístilling apparatus (Fig. 5), g ZnCb ánd thereafter 20 ml of methanol was added. Nöw the boric acid cquld be distilled off as methylborate. This procedure must be repeated-nine times but with 10 ml of methanol only. The combined. distillates should be evaporated after adding of KOH to glryness, then the bori'c acid can be titrated-suitably as-mannitolboric jicid in the usual way. Temperature during the distilling procedure~should not rise over 1-00°. The remainder in the distilling appa'ratuj contains the whole fluorine, Now if can be distilled'off after adding of 0.02 g SiOa a'nd a few ml of water with steam cyrrent atvl60—;180° as H2SÍF6. 300 ml of water must be distilled off to get all the fluorine, present in the sample. The distillate should be neutralized with NqOH and evaporated to dryness. It is useful to turn the NaOH into Na2CO.i, which precipitates the little amount of ZnCl2 distilled over. However ZrrCk is very useful to remove silicon aS ZnSiO.-! from the NasSiFe., The residue contains all flourine and could be precipitated and weighed as PbCIF, which can be titrated thereafter by the Volhard method, It is remarkable, that only smajl amoünts of fluorine can be distilled óff from the thermal water~ studied. When we started with too large samples of water, we got too low results. We are of the opinion, that the large amount of metasilicic acid always present in-.c»ur thermal springs is responsible for this phenomenon. However, we are of the opinion that we have the same phenomenon (very strong complex compounds of fluorine with silicon, "boron and other elements not identified vet) before us in the „mottled teeth" never óbserved in Budapest; however, the fluorine content of our thermal waters is over 1 mg/kg. - We determined alsó iodine in somé of the thermal waters of Budbpest. The method used and described is the modified and adapted method of L. W- WINKLER. j