微波辅助制备巴旦木壳吸附剂对活性艳红X-B吸附性能研究

Study on the Adsorption Properties of Microwave-assistant Prepared Badam Shell Adsorbent on Reactive Brilliant Red X-B

以新疆厚皮原味巴旦木去仁所得壳作为原料进行实验,通过0.7 mol/L氯化锌活化成活性炭。探索在不同频率的微波条件下,各种因素对巴旦木壳吸附活性艳红X-B的影响。微波协同巴旦木壳活性炭吸附剂对活性艳红X-B染料吸附有一定的效果,最佳吸附条件是0.5 g活性炭、100 mg/L活性艳红X-B染料、辐射时间2 min。吸附过程符合准二级动力学方程,是化学吸附。经过对比发现Langmuir吸附等温式拟合效果明显,是单分子层吸附。正交试验得出吸附量优化组合为t=1 min,m=0.6 g,c=300 mg/L;去除率组合:t=3 min,m=0.6 g,c=100 mg/L。极差分析得出吸附量优化组合为t=2 min,m=0.6 g,c=300 mg/L,影响顺序依次为染料浓度>吸附剂用量>吸附时间;去除率的优化组合:t=3 min,m=0.6 g,c=300 mg/L,影响顺序依次为染料浓度>吸附剂用量>吸附时间。方差分析得出,吸附量的影响顺序为染料浓度影响最大,吸附剂用量次之,吸附时间影响最小;去除率的影响顺序为染料浓度最大,吸附剂用量次之,吸附时间影响不大。

Activated carbon was prepared from the Badam shell of Xinjiang thick-skinned original taste as raw material and activated with 0.7 mol/L zinc chloride.We explored the effects of various factors on the adsorption activity of reactive brilliant red X-B on Badam shells under different microwave conditions at different frequencies.Microwave combined with activated carbon adsorbent of Badam shell has a certain effect on the adsorption of reactive brilliant red X-B dye.The optimal adsorption condition was 0.5 g activated carbon,100 mg/L reactive brilliant red X-B dye,and the radiation time was 2 min.The adsorption process conforms to the quasi-second order kinetic equation and was chemical adsorption.By comparison,the Langmuir adsorption isothermal fitting method was found to be effective in monolayer adsorption.The optimal combination of adsorption capacity was obtained by orthogonal experiment:t=1 min,m=0.6 g,and c=300 mg/L.Combination of removal rates:t=3 min,m=0.6 g,c=100 mg/L.Range analysis showed that the optimal combination of adsorption capacity was t=2 min,m=0.6 g,and c=300 mg/L.Influence order:dye concentration>adsorbent dosage>adsorption time.The optimal combination of removal rate:t=3 min,m=0.6 g,c=300 mg/L.Influence order:dye concentration>adsorbent dosage>adsorption time.Anova showed that the order of influence of adsorption amount was as follows:dye concentration had the greatest influence,followed by adsorbent dosage,and adsorption time had the least influence.The order of influence of removal rate:dye concentration is the largest,followed by the amount of adsorbent,adsorption time has little influence on the experimental results.