xmlui.ArtifactBrowser.SimpleSearch.filter.source:Scientific papers of the University of Pardubice. Series A, Faculty of Chemical Technology. 21/2015
ISSN:1211-5541
Abstract:
A sequestering agent or a chelating agent are the substances capable of removing
a metal ion from a solution system via formation of a complex ion that does not
possess the reaction activity of the ion removed. These agents are being used to
eliminate the water hardness and some metals, such as iron; both having found
a wide applicability in the textile industry. The sequestration capacity was
measured at 20 °C and 90 °C using media with different pH and in combination
with precipitating opacity titration — the so-called Hampshire test. The samples
were tested at model washing conditions after 20× repeated washing in hard
water (22 °dH, for 30 min at 90 °C) to determine the content of the ash and Ca2+
ions. The image of fabric after such a model washing has then been evaluated with
the aid of imaging with a scanning electron microscope.