期刊论文

中文

中国粉体技术

1008-5548

2017

23

1

1-6

10.13732/j.issn.1008-5548.2017.01.001

(13K070,15K147):湖南省高校创新平台开放基金 (2015SK20043,2016SK2030):湖南省重点研发计划项目 :湖南省环境保护科技计划项目编号,湘财建指[2014]287号 (YB2015B031):湖南省优秀博士学位论文获得者科研项目 :中南林业科技大学引进***人才科研启动基金(0369) (2310006):湖南省环境科学重点学科建设基项目金

本校为第一机构

为研究液相还原法制备的纳米零价铁去除Pb~(2+)的机理,在液相还原法的基础上加入有机高分子材料,制备纳米零价铁;利用扫描电镜(SEM)和X射线衍射(XRD)对其进行表征;研究不同时间时离子初始浓度和溶液初始pH值对纳米零价铁去除Pb~(2+)的影响。结果表明:纳米零价铁对Pb~(2+)的去除在120 min内基本达到平衡,当Pb~(2+)初始浓度为50、100 mg/L、纳米零价铁添加量为1 g/L时,Pb~(2+)去除率达99%以上;pH值从2.0增大至3.0时,Pb~(2+)的去除率从41.47%增大至73.58%;pH值从3.0增大至4.0时,Pb~(2+)去除率从73.58%增大至92.62%;动力学拟合结果表明,纳米零价铁去除Pb~(2+)的过程符合准二级动力学模型;纳米零价铁...

In order to clarify the removal effect and mechanism of Pb~(2+) from water,the nano zero-valent iron(NZVI)was prepared by the method of liquid phase reduction.NZVI was prepared by liquid phase reduction with addition of organic polymer material.The characteristics of NZVI was investigated using scanning electron microscope(SEM)and X-ray diffraction(XRD).The experiment was conducted to investigate the influence of initial ion concentration and solution initial pH value on removal of Pb~(2+) with time changing, and clarify the removal effect and mechanisms of Pb~(2+) from water using NZVI.The re...