A novel amphoteric granular lignin adsorbent(AGLA) was prepared using magnesium lignosulfonate as a raw material which was provided by a straw sulfite pulp mill in Guangdong Province, China. A reactive dye(red K-3B) w...A novel amphoteric granular lignin adsorbent(AGLA) was prepared using magnesium lignosulfonate as a raw material which was provided by a straw sulfite pulp mill in Guangdong Province, China. A reactive dye(red K-3B) was used as an adsorbate to investigate the adsorption behavior by static and mobile ways. The removal of reactive red K-3B was found to be initially pH and concentration dependent. Moreover, an increase of solution temperature ranging from 5℃ to 60℃ helped to enhance the rate of intraparticle diffusion of adsorbate and changes in the size of the pores of the adsorbent and thus to reduce the adsorption time. The total breakthrough adsorption capacity was 531 mg/g, and the saturated adsorption capacity was 560 mg/g, which prevailed over the activated carbons evidently. The reactive red K-3B adsorbed on AGLA could be recovered with a mixture of alcohol, NaCl and HCl aqueous solutions. The recovery percentage could reach 92.4%.展开更多
以研制粒状钙离子吸附剂为目的,采用吸附材料与粘结剂、增孔剂、水等辅助物料混合的方法,进行了粘结剂筛选和粒状吸附剂的制备试验。结果表明:以13X沸石为吸附材料,凹凸棒土为粘结剂;按照沸石、凹凸棒土、精煤粉15∶4∶1的配比,煅烧温度...以研制粒状钙离子吸附剂为目的,采用吸附材料与粘结剂、增孔剂、水等辅助物料混合的方法,进行了粘结剂筛选和粒状吸附剂的制备试验。结果表明:以13X沸石为吸附材料,凹凸棒土为粘结剂;按照沸石、凹凸棒土、精煤粉15∶4∶1的配比,煅烧温度为650℃制得的粒状吸附剂性能最优;钙离子吸附量达到30.81 mg/g,损失率为1.76%;缩小吸附剂粒径、吸附速率增大;延长吸附时间,吸附量增加,120 m in时基本达到饱和。展开更多
文摘A novel amphoteric granular lignin adsorbent(AGLA) was prepared using magnesium lignosulfonate as a raw material which was provided by a straw sulfite pulp mill in Guangdong Province, China. A reactive dye(red K-3B) was used as an adsorbate to investigate the adsorption behavior by static and mobile ways. The removal of reactive red K-3B was found to be initially pH and concentration dependent. Moreover, an increase of solution temperature ranging from 5℃ to 60℃ helped to enhance the rate of intraparticle diffusion of adsorbate and changes in the size of the pores of the adsorbent and thus to reduce the adsorption time. The total breakthrough adsorption capacity was 531 mg/g, and the saturated adsorption capacity was 560 mg/g, which prevailed over the activated carbons evidently. The reactive red K-3B adsorbed on AGLA could be recovered with a mixture of alcohol, NaCl and HCl aqueous solutions. The recovery percentage could reach 92.4%.
文摘以研制粒状钙离子吸附剂为目的,采用吸附材料与粘结剂、增孔剂、水等辅助物料混合的方法,进行了粘结剂筛选和粒状吸附剂的制备试验。结果表明:以13X沸石为吸附材料,凹凸棒土为粘结剂;按照沸石、凹凸棒土、精煤粉15∶4∶1的配比,煅烧温度为650℃制得的粒状吸附剂性能最优;钙离子吸附量达到30.81 mg/g,损失率为1.76%;缩小吸附剂粒径、吸附速率增大;延长吸附时间,吸附量增加,120 m in时基本达到饱和。
