采用傅里叶红外光谱仪(FTIR)对天然和改性油菜秸秆进行表征,探究了溶液初始pH值、吸附剂投加量、碱性品红初始质量浓度、吸附时间等因素对天然和改性油菜秸秆吸附碱性品红的影响.实验表明:经酒石酸改性的油菜秸秆对碱性品红的吸附容量较天然油菜秸秆提升了近1倍,最大吸附量由改性前的70.922 mg·g-1增加至138.889mg·g-1.298 K时,在不调节染料溶液初始pH值,投加量为0.04g,吸附60 min条件下,改性油菜秸秆对100mg·L-1碱性品红的去除率达到了95.85％.实验结果符合Langmuir等温吸附模型,相关系数R2值在0.99以上.改性油菜秸秆对碱性品红的吸附符合准二级动力学方程.
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