A high-efficiency, low-cost and environmem-friendly 2-acrylamide-2-methyl propane sulfonic acid （AMPS）-modified hazelnut-shell-based adsorbent（AHS） was synthesized and used to adsorb Cu2＋, Pb2＋, methylene blue...A high-efficiency, low-cost and environmem-friendly 2-acrylamide-2-methyl propane sulfonic acid （AMPS）-modified hazelnut-shell-based adsorbent（AHS） was synthesized and used to adsorb Cu2＋, Pb2＋, methylene blue（MB） and malachite green（MG） from aqueous solutions. The AHS was characterized by means of SEM, BET, FTIR and XPS. Different experimental parameters were evaluated in batch adsorption experiments to determine the optimal adsorption conditions. Adsorption kinetics shows that the adsorption rate is well represented by the pseudo- secend-order rate model, and the Langmuir model gives the best fit adsorption isotherm. The Langmuir maximum adsorption capacities were fotmd to be 21.14 mg/g for Cu2＋, 32.74 mg/g for Pb2＋, 68.03 mg/g for MB and 263.16 mg/g for MG, respectively, while the adsorption capacities could be maintained above 90% even after ten adsorp- tion-desorption cycles. The experimental results show that AHS could be applied to treat both industrial and munici- pal wastewaters.展开更多
在大孔树脂一次分离纯化榛子壳棕色素粗提液的基础上,选用D101大孔树脂对榛子壳棕色素进行二次分离纯化,通过单因素试验及正交试验优化大孔树脂二次分离纯化榛子壳棕色素的工艺,试验结果表明,上样质量浓度为22 mg/m L,上样流量为1.5 m L...在大孔树脂一次分离纯化榛子壳棕色素粗提液的基础上,选用D101大孔树脂对榛子壳棕色素进行二次分离纯化,通过单因素试验及正交试验优化大孔树脂二次分离纯化榛子壳棕色素的工艺,试验结果表明,上样质量浓度为22 mg/m L,上样流量为1.5 m L/min,洗脱剂(乙醇)体积分数为80%,洗脱流量为2.5 m L/min为最佳纯化条件。经D101二次分离纯化的榛子壳棕色素,色价从44提高到了82.6。对纯化后的榛子壳棕色素的理化性质进行研究,结果表明,该色素耐光性好,高温、色素溶液的p H对该色素的稳定性有一定的影响;Na+、Mg^(2+)、K+、Ca^(2+)对其稳定性影响小,Fe^(3+)、Cu^(2+)、Al^(3+)、Zn^(2+)对其稳定性有破坏作用;该色素对淀粉类、禽蛋类、肉类食品的着色性良好。展开更多
文摘A high-efficiency, low-cost and environmem-friendly 2-acrylamide-2-methyl propane sulfonic acid （AMPS）-modified hazelnut-shell-based adsorbent（AHS） was synthesized and used to adsorb Cu2＋, Pb2＋, methylene blue（MB） and malachite green（MG） from aqueous solutions. The AHS was characterized by means of SEM, BET, FTIR and XPS. Different experimental parameters were evaluated in batch adsorption experiments to determine the optimal adsorption conditions. Adsorption kinetics shows that the adsorption rate is well represented by the pseudo- secend-order rate model, and the Langmuir model gives the best fit adsorption isotherm. The Langmuir maximum adsorption capacities were fotmd to be 21.14 mg/g for Cu2＋, 32.74 mg/g for Pb2＋, 68.03 mg/g for MB and 263.16 mg/g for MG, respectively, while the adsorption capacities could be maintained above 90% even after ten adsorp- tion-desorption cycles. The experimental results show that AHS could be applied to treat both industrial and munici- pal wastewaters.
文摘在大孔树脂一次分离纯化榛子壳棕色素粗提液的基础上,选用D101大孔树脂对榛子壳棕色素进行二次分离纯化,通过单因素试验及正交试验优化大孔树脂二次分离纯化榛子壳棕色素的工艺,试验结果表明,上样质量浓度为22 mg/m L,上样流量为1.5 m L/min,洗脱剂(乙醇)体积分数为80%,洗脱流量为2.5 m L/min为最佳纯化条件。经D101二次分离纯化的榛子壳棕色素,色价从44提高到了82.6。对纯化后的榛子壳棕色素的理化性质进行研究,结果表明,该色素耐光性好,高温、色素溶液的p H对该色素的稳定性有一定的影响;Na+、Mg^(2+)、K+、Ca^(2+)对其稳定性影响小,Fe^(3+)、Cu^(2+)、Al^(3+)、Zn^(2+)对其稳定性有破坏作用;该色素对淀粉类、禽蛋类、肉类食品的着色性良好。
