2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures
2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures
2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures
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Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology<br />
Fig 3. Comparison of b analysis<br />
Note : w.w. = waste water, MWWT = mechanical waste water<br />
treatment, SWTP = sewage water treatment plant<br />
Fig. 4. boron concentrations<br />
The results are from these samples, because boron could be<br />
component in small particulates of waste water samples.<br />
Boron concentration is low in waster water which is cleaned<br />
in SWTP. The limits are not specified by low for boron concentration<br />
in waste water to the water recipient.<br />
In the Danube, water (Komárno – Bratislava) was<br />
determinate to have a natural concentration on the level of<br />
s524<br />
39 µg dm –3 (ref. 6 ) and for river is the level of 20 µg dm –3 in<br />
the river after the biological waste water treatment plant and<br />
20 µg dm –3 in recipient to pulp mill. Boron concentration was<br />
low in lime sludge too. Boron was accumulation in system<br />
and its output was waste water, but boron concentration was<br />
low.<br />
Conclusions<br />
In this work was studied effect of adding boron compound<br />
to recovery line on the water quality.<br />
• Boron is component in very small particulates in waste<br />
water, therefore boron concentration is better without<br />
filtration of samples for boron determination. Boron<br />
concentration is not total in waste water by filtration.<br />
• Boron concentration is low in output - waste water to<br />
river, what corresponding accumulation of boron compounds<br />
in system of pulp mill.<br />
• There was little decreasing of boron concentration after<br />
trial, but boron compounds were in system.<br />
Open question:<br />
• What about deposits in recovery line and pipeline of<br />
waste water?<br />
This work has been supported by Kraft pulp mill.<br />
REFEREnCES<br />
1. Internet: Referat – prvky p1 a p2<br />
<strong>2.</strong> www.chtf.stuba.sk/kach/support/ACh_prednaska06.pdf<br />
3. Richards T., nohlgren I., Warnqvist B., Theliander H.:<br />
nordic Pulp and Paper Research Journal 17(3), 213<br />
(2002).<br />
4. http://sk.wikipedia.org/wiki/B%C3%B3r<br />
5. Safety data sheet for commercial product [borax]<br />
6. www.gabcikovo.gov.sk/vvb/vr2004/priloha%20D/text.<br />
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