腐植酸钠改性坡缕石对甲基紫吸附性能的研究  

Study on Adsorption Properties of Palygorskite Modified with Sodium Humate for Methyl Violet

作　　者：张志芳 魏佳 崔彦君[1] 桂文君 李莉[1] 巩海鹏[1] ZHANG Zhifang;WEI Jia;CUI Yanjun;GUI Wenjun;LI Li;GONG Haipeng(College of Science,Gansu Agricultural University,Lanzhou 730000,China)

机构地区：[1]甘肃农业大学理学院,甘肃兰州730000

出　　处：《水处理技术》2024年第6期57-62,共6页Technology of Water Treatment

基　　金：国家自然科学青年基金资助项目(32002136);甘肃省青年科技基金计划(20JR5RA018);甘肃农业大学人才引进专项(2017RCZX-40)。

摘　　要：坡缕石(又名凹凸棒石,简写PAL)是一种天然的2:1型的层链状含水富镁、铝硅酸盐黏土矿物,由于其独特的一维棒状晶体形貌和纳米孔道结构,已广泛应用在吸附领域。在水热条件下,将PAL添加到腐植酸钠溶液中,制备了PAL吸附剂。采用电子扫描电镜(FESEM)、X射线衍射(XRD)、热重分析(TG)等表征手段系统研究了水热改性对PAL吸附剂微观结构和理化性能的影响,并评价了PAL吸附剂对甲基紫的吸附性能。考察了改性剂浓度、溶液pH、振荡时间对甲基紫吸附量的影响。结果表明,PAL材料可以完全去除100 mg/L染料溶液中的甲基紫,去除率达到98%以上,相比原天然PAL,去除率提高了51%。Palygorskite(also known as attapulgite,abbreviated as PAL)is a natural Mg/Al-rich silicate clay mineral with 2:1 layered chain structure.Due to its unique one-dimensional rod-like crystal morphology and nanopore structure,it has been widely used in adsorption field.The PAL adsorbent were prepared by adding PAL to sodium humate(SA)solution under hydrothermal conditions.The effects of hydrothermal modification on the microstructure and physicochemical properties of PAL adsorbent were systematically studied by field-emission scanning electron microscopy(FESEM),X-ray diffraction(XRD)and thermogravimetric analysis(TG),and the adsorption properties of PAL adsorbent for methyl violet(MV)were evaluated.Furthermore,the effects of modifier concentration,pH in solution and duration of oscillation on the adsorption capacity of MV were inspected.The results suggest that the MV from 100 mg/L dye solution can be almost completely removed by PAL adsorbent,with a removal rate of 98%,which is 51%higher than that of natural PAL.

关 键 词：坡缕石 腐植酸钠 水热法 甲基紫 吸附 

分 类 号：TQ424[化学工程] X703.1[环境科学与工程—环境工程]