纳米零价铁对重金属Cr(Ⅵ)去除作用的研究进展
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摘要
重金属污染会严重破坏水体生态、土壤生态,也会给人体健康带来严重的危害,在环境中,Cr(Ⅵ)易被生物体吸收,并在其体内累积,具有较强的致癌性、致畸性,因此对Cr(Ⅵ)的去除受到人们的广泛关注。纳米零价铁因具有比表面积大、反应迅速等特点,在去除重金属方面,成为一种简单高效的方法。近几年来,许多学者也通过对纳米零价铁材料的负载、改进以提高其对重金属的去除效率。该文从在纳米零价铁表面引入另一种金属、将其负载在活性炭、稳定剂上等方面比较其对Cr(Ⅵ)的去除效率以及相关影响因素。
Heavy metal pollution will damage water and soil ecology seriously,and also bring serious harm to human health. In the environment,Cr(Ⅵ) is easily absorbed by organisms and accumulated in their bodies,which has strong carcinogenicity and teratogenicity. Therefore,the removal of Cr(Ⅵ) has attracted wide attention. It is a simple and efficient method to remove heavy metals by nano zero-valent iron for the characteristics of large specific surface area and rapid reaction. In recent years,many scholars also improve the removal efficiency of heavy metals by improving the load of nanometer zero-valent iron materials. In this paper,the removal effect of Cr(Ⅵ) on the surface of zero-valent nano-iron and related influencing factors were compared in terms of adding functional groups to the surface or attaching them to stabilizers.
Heavy metal pollution will damage water and soil ecology seriously,and also bring serious harm to human health. In the environment,Cr(Ⅵ) is easily absorbed by organisms and accumulated in their bodies,which has strong carcinogenicity and teratogenicity. Therefore,the removal of Cr(Ⅵ) has attracted wide attention. It is a simple and efficient method to remove heavy metals by nano zero-valent iron for the characteristics of large specific surface area and rapid reaction. In recent years,many scholars also improve the removal efficiency of heavy metals by improving the load of nanometer zero-valent iron materials. In this paper,the removal effect of Cr(Ⅵ) on the surface of zero-valent nano-iron and related influencing factors were compared in terms of adding functional groups to the surface or attaching them to stabilizers.
引文
[1] 赵玲子,彭小晨,李婷,等.琼脂改性纳米铁去除水体中Cr(Ⅵ)的研究[J].辽宁化工,2018,47(10):986-988.
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[4] 张唯,沈峥,王晨璐,等.纳米零价铁的改性及其在废水处理中的应用综述[J].净水技术,2016,35(4):23-30.
[5] 马少云,祝方,商执峰.纳米零价铁铜双金属对铬污染土壤中Cr(Ⅵ)的还原动力学[J].环境科学,2016,37(5):1953-1959.
[6] 周娟娟,李战军.活性炭/纳米零价铁复合吸附剂的制备及对砷的去除应用[J].环境科学与管理,2012,37(10):106-108.
[7] 赵秋芳,赵青云,王辉,等.生物炭改良土壤机理及其在我国热区应用前景综述[J].热带农业科学,2014,34(10):53-57.
[8] 薛嵩,钱林波,晏井春,等.生物炭携载纳米零价铁对溶液中Cr(Ⅵ)的去除[J].环境工程学报,2016,10(6):2895-2901.
[9] Jiao C,Cheng Y,Fan W,et al.Synthesis of agar-stabilized nanoscale zero-valent iron particles and removal study of hexavalent chromium[J].International Journal of Environmental Science and Technology,2015,12(5):1603-1612.
[10] 张悦,苏冰琴,张弛,等.果胶稳定的纳米零价铁去除水中Cr(Ⅵ)的研究[J].工业水处理,2016,36(9):47-50.
[2] Vunain E,Mishra A K,Mamba B B.Dendrimers,mesoporous silicas and chitosan-based nanosorbents for the removal of heavy-metal ions:a review[J].International Journal of Biological Macromolecules,2016,86:570-586.
[3] 辛梓弘,凡小梅,倪海晨,等.纳米零价铁的制备及其对废水中铬的去除作用研究[J].广州化工,2017,45(11):74-76.
[4] 张唯,沈峥,王晨璐,等.纳米零价铁的改性及其在废水处理中的应用综述[J].净水技术,2016,35(4):23-30.
[5] 马少云,祝方,商执峰.纳米零价铁铜双金属对铬污染土壤中Cr(Ⅵ)的还原动力学[J].环境科学,2016,37(5):1953-1959.
[6] 周娟娟,李战军.活性炭/纳米零价铁复合吸附剂的制备及对砷的去除应用[J].环境科学与管理,2012,37(10):106-108.
[7] 赵秋芳,赵青云,王辉,等.生物炭改良土壤机理及其在我国热区应用前景综述[J].热带农业科学,2014,34(10):53-57.
[8] 薛嵩,钱林波,晏井春,等.生物炭携载纳米零价铁对溶液中Cr(Ⅵ)的去除[J].环境工程学报,2016,10(6):2895-2901.
[9] Jiao C,Cheng Y,Fan W,et al.Synthesis of agar-stabilized nanoscale zero-valent iron particles and removal study of hexavalent chromium[J].International Journal of Environmental Science and Technology,2015,12(5):1603-1612.
[10] 张悦,苏冰琴,张弛,等.果胶稳定的纳米零价铁去除水中Cr(Ⅵ)的研究[J].工业水处理,2016,36(9):47-50.
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