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利用香蕉皮~@氧化锆(ZrBP)、香蕉皮~@氧化铜(CuBP)、香蕉皮~@氧化镁(MgBP)和香蕉皮纤维素(BP)4种材料作为新型吸附剂对水体中亚硝酸根进行吸附去除。试验结果表明,当pH值为2.0、吸附剂浓度为0.4g/L和反应时间为90min,温度为40℃时,ZrBP、CuBP、MgBP和BP等4种复合材料对2mg/L亚硝酸根的最大去除率分别为80.70%、72.40%、53.81%和47.52%。准二级动力学方程能较好地拟合亚硝酸根在4种材料表面的吸附动力学试验数据,结果表明,控制材料表面吸附速率的因素比较复杂,既有液膜扩散又有颗粒内扩散。热力学数据表明,该吸附过程是一个自发的、吸热的物理吸附过程,提高温度有利于吸附反应的进行。
Abstract：Banana peel coated by zirconium oxide(ZrBP),banana peel coated by copper oxide(CuBP),banana peel coated by magnesium oxide(MgBP) and banana peel(BP) were prepared and used as novel adsorbents to remove nitrite from aqueous solution.The results showed when the pH was 2.00,adsorbent dosage was 0.4 g/L,contact time was 90 min,the removal rate of nitrite ion in aqueous solution at the concentration of 0.2 mg/L on the surface of Zr BP,Cu BP,Mg BP and BP was 80.70%,72.40%,53.81% and 47.52%,respectively.Pseudo-second-order nitrite dynamics equations well fitting in four surface adsorption kinetics test data showed that surface adsorption rate of complex materials,both liquid membrane diffusion and particle diffusion.Thermodynamic data indicated that the adsorption process was spontaneous,endothermic,physical adsorption process,increasing temperature was favorable for the adsorption process.
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基本信息:
DOI：10.16026/j.cnki.iea.2017050436
中图分类号:O647.3;X52
引用信息:
[1]魏永腾,吴守林,张庆乐,等.香蕉皮@金属氧化物复合材料对亚硝酸根的吸附特征[J].离子交换与吸附,2017,33(05):436-445.DOI:10.16026/j.cnki.iea.2017050436.
基金信息:
国家级大学生创新创业训练计划(201510439050)