| 生物炭负载零价纳米铁对溶液中的 Cr6+ 去除的研究 |
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| 引用本文：唐宝玲,李盟,陈胜文,王利军.生物炭负载零价纳米铁对溶液中的 Cr6+ 去除的研究[J].上海第二工业大学(中文版),2019,(3):159-165 |
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| 基金项目:上海市高原学科 - 环境科学与工程 (资源循环科学与工程), 上海第二工业大学培育学科建设项目 (EGD18YJ0029),
青产学研 2018-48 资助 |
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| 中文摘要:生物炭(biochar, BC) 作为载体, 负载纳米零价铁(nano zero valent iron, nZVI) 形成复合吸附材料, 利用电子
扫描显微镜(SEM) 和X 射线衍射仪(XRD) 表征材料的结构特征。研究了不同材料、初始溶液初始pH、不同初始浓
度、去除剂的投加量对BC 负载nZVI (nZVI-BC) 去除含Cr6+ 废水的影响。结果表明: BC 的加入提高了nZVI 的分
散性和抗氧化性, 同时提升稳定性, 对于水中Cr6+ 的去除具有较好的效果; 当Cr6+ 的初始浓度为15 mg/L, 去除剂
的投加量为2.5 g/L, pH=4 的条件下, 其去除率达到了98%; nZVI-BC 去除含Cr6+ 废水的过程符合Langmuir 吸附等
温式和准一级动力学方程, 其中最大吸附量为209.93 mg/g。 |
| 中文关键词:生物炭 改性材料 纳米零价铁 含铬废水 |
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| Study on Removal of Cr6+ in Solution by Nano Zero-Valent IronSupported on Biochar |
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| Abstract:Biochar (BC) was used as a carrier, and nano zero valent iron (nZVI) was supported to form a composite adsorbent. The
structural characteristics of the material were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The
effects of different materials, initial pH of initial solution, different initial concentrations and dosage of remover on the removal of
Cr6+ wastewater by BC supported nZVI (nZVI-BC) were studied. The results show that the addition of BC improves the dispersibility,
oxidation resistance of nZVI and the stability. It has a good effect on the removal of Cr6+ in water. When the initial concentration of
Cr6+is 15 mg/L, the addition of the remover is 2.5 g/L and the value of pH is 4, the removal rate is up to 98%; the removal rate of Cr6+
wastewater by nZVI-BC accords with Langmuir adsorption isotherm and pseudo-first-order kinetic equation, the maximum adsorption
amount is 209.93 mg/g. |
| keywords:biochar modified materials nano zero valent iron wastewater containing chromium |
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