Zn-Al-Zr LDH/氧化石墨烯对水中草甘膦的去除研究  

Removal of Glyphosate from Aqueous Solution by Zn-Al-Zr LDH/GO

作　　者：任建辉 熊昆 李冬梅[3] REN Jian-hui;XIONG Kun;LI Dong-mei(State Key Laboratory of Environment-Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China;School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China;Nantong Huanan Intelligent Technology Co.,Ltd.,Nantong 226000,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,绵阳621010 [2]西南科技大学材料与化学学院,绵阳621010 [3]南通环安智能科技有限公司,南通226000

出　　处：《中国陶瓷》2024年第7期28-35,共8页China Ceramics

基　　金：企业委托技术开发项目(zh0183)。

摘　　要：采用氯化锌、六水合氯化铝、八水合氧氯化锆和氧化石墨烯为原料,氢氧化钠和一水合碳酸钠为碱溶液,通过共沉淀法合成Zn-Al-Zr LDH/GO纳米复合材料(LDH/GO)。XRD、SEM、BET和UV-Vis分光光度计,分别用于表征Zn-Al-Zr LDH/GO复合材料的物相组成、微观形貌、孔隙结构和吸附过程。结果表明:GO的掺入可以改善LDH的形貌结构,当温度在303 K,pH=7,投料量为0.5g/L,LDH/GO对草甘膦的吸附容量可达10.707 mg/g;其吸附过程符合准二级动力学和Freundlich等温吸附模型,LDH/GO对草甘膦的去除机理为静电吸引和表面络合;其草甘膦吸附性能优于当前商业磷吸附产品Phoslock。因此,Zn-Al-Zr LDH/GO可作为一种有前景的草甘膦去除剂。Using zinc chloride,aluminum chloride hexahydrate,zirconyl chloride octahydrate,and graphene oxide as raw materials,with sodium hydroxide and sodium carbonate monohydrate as alkaline solutions,the Zn-Al-Zr LDH/graphene oxidized(LDH/GO)nanocomposite was synthesized via a coprecipitation method.XRD,SEM,BET and UV-Vis spectrophotometers were employed to characterize the s in terms of phase composition,microscopic morphology,pore structure and adsorption process of the Zn-Al-Zr LDH/GO composite material,respectively.Our findings indicate that the incorporation of GO can improve the morphology and structure of LDH.The adsorption capacity of LDH/GO for glyphosate was found to be 10.707 mg/g under the conditions of temperature at 303 K,pH=7 and a dosage of 0.5 g/L.The adsorption process follows the quasi-second-order kinetics and Freundlich isothermal adsorption models.The mechanism by which glyphosate is removed by LDH/GO is through electrostatic attraction and surface complex formation.The glyphosate adsorption performance of LDH/GO surpasses that of the current commercial phosphate adsorbent,Phoslock.Therefore,Zn-Al-Zr LDH/GO is an effective glyphosate removal agent.

关 键 词：层状双金属氢氧化物 石墨烯 去除 草甘膦 

分 类 号：TQ174.758.2[化学工程—陶瓷工业]