The Influence of Environment on the Hydrous Ferric Oxide Composite Resin Adsorption of -Naphthalene Sulfonic Acid

Abstract

Abstract.A new type of macroporous weakly basic anion exchange resin (HFO D301R) was used to adsorption of naphthalene sulfonic acid in different environments. The effects of temperature, salt concentration and pH value of the solution on HFO-naphthalene sulfonic acid resin adsorption effect were studied The results show that HFO-D301R maximum adsorption capacity of β-naphthalene sulfonic acid can reach 235 mg/g at 10 °C. The increase of salt solution concentration (sodium chloride or sodium sulfate) restrain adsorption of iron composite resin on β-naphthalene sulfonic acid; The pH value of the solution also affect the adsorption capacity of the iron composite resin, and the best result of adsorption was obtained at pH=4.Introduction β-naphthalene sulfonic acid sodium salt (β-salt) producted as dye intermediates results in a large number of β -salt mother liquor. The color of mother liquor is deep because it contains 3% of the β-naphthalene sulfonic acid , 3% of the sulfuric acid and a small amount of Sulphur trioxide. The pH of mother liquor is lower than 3. Today, the main processing technologies have chemical oxidation, membrane separation and extraction [1].These presence methods have many shortcomings, which include high consumption of oxidizing agent; easily polluting the membrane materials whose life is low; high consumption of extraction agent; difficult reextraction process currently, the harmlessness of the β-naphthalene sulfonic acid wastewater cannot effectively realize. At present, the ion exchange resin method which are separated of organic and inorganic matter in aqueous solution have some rarely successful examples [2,3]. However, there is not research report that β-naphthalene sulfonic acid/sulfuric acid/sulfite mixture is adsorpted by weakly basic anion exchange resin composited on hydrated ferric oxide. In this article, the main object of study is macroporous weakly basic anion exchange resin (domestic, D301) as the carrier to compound a kind of new adsorption material according to the literature [4]. which is evaluated by ferric oxide composite resin exchange absorption of naphthalene sulfonic acid in different surroundings : the temperature, pH, salt, etc.