D301是在大孔結(jié)構(gòu)的苯乙烯-二乙烯苯共聚體上主要帶有叔胺基-N(CH3)2的陰離子交換樹(shù)脂。其堿性較弱，能在酸性近中性介質(zhì)中有效地交換無(wú)機(jī)酸及硅酸根，并能吸附分子尺寸較大的雜質(zhì)以及在非水溶液中使用。該樹(shù)脂具有再生效率高、交換容量大、抗污染能力強(qiáng)、機(jī)械強(qiáng)度好的優(yōu)點(diǎn)。
主要用于純水及高純水制備，電鍍含鉻廢水處理等
研究了酸性條件下氯酚在大孔弱堿樹(shù)脂D301上的吸附機(jī)理。研究表明,在一定的吸附質(zhì)濃度及pH值下,D301樹(shù)脂對(duì)對(duì)氯酚和鄰氯酚的吸附量與溶液平衡濃度之間存在良好的線性關(guān)系,吸附過(guò)程類似于固相萃取過(guò)程,且分配系數(shù)與相應(yīng)pH值下X射線光電子能譜(XPS)測(cè)得的樹(shù)脂上自由叔胺基團(tuán)含量呈線性關(guān)系。
In the present study X-ray photoelectron spectroscopy (XPS) was adopted to elucidate sorption mechanism of o-chlorophenol and p-chlorophenol onto a weak anion exchanger D301. The distribution of specific bs of amino groups on D301 was obtained and effect of free tertiary amine group on phenol sorption onto D301 was discussed. The result indicate that less free amino group on D301 caused by external solution with lower pH leads to less sorptive capacity of o-chlorophenol and p-chlorophenol respectively. U...