膨胀珍珠岩负载纳米零价铁高效除磷的研究  

Expanded perlite-loaded nano-Fe~0 for efficiently removing phosphates in wastewater

作　　者：范晨 孟家琪 郭波[1] FAN Chen;MENG Jia-qi;GUO Bo(College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西太原030024

出　　处：《现代化工》2023年第2期117-122,127,共7页Modern Chemical Industry

基　　金：山西省应用基础研究计划项目(201901D111070);国家自然科学基金(U1610105);山西省重点研发计划项目(201803D31040)。

摘　　要：采用液相化学还原法制备纳米零价铁,并负载于膨胀珍珠岩上制备nFe@EP材料,用于去除水体中的磷酸盐。考察了溶液初始pH、温度、nFe@EP投加质量浓度和初始磷酸盐质量浓度的影响。结果表明,nFe@EP对水中磷酸盐有良好的吸附性,在温度298 K、pH 5.0、初始磷酸盐质量浓度为100 mg/L、nFe@EP质量浓度为3.0 g/L时,磷酸盐的去除率可达95.7%,吸附量达到31.9 mg/g。吸附动力学研究结果表明,伪二级吸附动力学模型能够更好地拟合nFe@EP吸附磷酸盐的行为,说明吸附过程是以化学吸附为主。热力学分析结果表明,吸附是自发放热的过程。Nano-zero valent iron is prepared by using liquid-phase chemical reduction method and loaded on expanded perlite to prepare nFe@EP material for removing phosphates in water.The effects of initial pH,temperature,the dosage of nFe@EP and the initial concentration of phosphates are investigated respectively.Results show that nFe@EP has a good adsorption to phosphates in water.The removal rate and adsorption capacity of phosphates can achieve 95.7%and 31.9 mg·g-1,respectively when the temperature is at 298 K,pH=5.0,the initial concentration of phosphates is 100 mg·L-1,and the dosage of nFe@EP is 3.0 g·L-1.It is found from adsorption kinetic studies that the pseudo-second-order adsorption kinetic model can better fit the adsorption of phosphates by nFe@EP,indicating that the adsorption process is dominated by chemical adsorption.Thermodynamic analysis results show that the adsorption is a spontaneous and exothermic process.

关 键 词：纳米零价铁 膨胀珍珠岩 磷酸盐 吸附 

分 类 号：TH3[机械工程—机械制造及自动化]