GSCoffers several nitrate selective ion exchange products based on higher amine functionalitiesand also provides standard Type I and type II strong base anion resins that can be used for nitrateremoval.
www.greenstarchem.hk6/ 23Although all strong base anion resins prefer nitrate over chloride, at TDS suitable for potable water, thestandard type I and type II resins prefer sulfate over nitrate. This preference can result in dumpingnitrates, acondition where the resin adds nitrate to the finished water instead of removing it.
GSC’s nitrate selective resins have increased selectivity for nitrate and prefer nitrate over sulfate andother anions, even at very low TDS. This increased preference prevents nitrate dumping. In waters thathave high sulfate concentrations the nitrate selective resins also enjoy higher operating capacities thancan be obtained from the standard type I and type II anion resins.
As with all other products intended for potable water, all of GSC’s nitrate selective resins as well asour standard type I and type II strong base anion resins are WQA Gold Seal approved and meet theNSF/ANSI 61 standard for drinking water.绿色星提供几种除硝酸根树脂。其中有的树脂在很低TDS情况下，硝酸根选择性比硫酸根和其他阴离子强。即使在高浓度的硫酸根溶液中，硝酸根选择性树脂也对硝酸根有很好的选择吸附性，有效避免了树脂中吸附的硝酸根倾泻到待处理溶液中。绿色星所有除硝酸根树脂均有WQA认证，符合ANSI/NSF 61标准。