Removal of Chloroform by Fe/Ni Nanoparticles Stabilized by Activated Carbon Fiber and Sodium Carboxymethylcellulose
JIN Xin
GAO Yulan
SONG Xinwei
NING Qingqian
SU Junjie
YANG Qi
Abstract：Fe-based nanoparticles have high activity in removing persistent organic pollutants in water bodies.However,Fe-based nanoparticles are prone to agglomeration under the enormous internal energy and magnetic attraction,leading to a decrease in reactivity.In this study,activated carbon fiber(ACF)and sodium carboxymethyl cellulose(CMC-Na)were selected as stabilizers to modify Fe/Ni nanoparticles and the removal of chloroform(CF)by ACF-Fe/Ni and CMC-Fe/Ni was systematically investigated.The results showed that the reduction activity of Fe/Ni nanoparticles was significantly improved after modification with stabilizers.The removal efficiency of CF by ACF-Fe/Ni and CMC-Fe/Ni were 96.2％and 98.1％,which was 11.9％and 13.8％higher than bare Fe/Ni nanoparticles,respectively.ACF not only effectively prevented the aggre-gation of Fe/Ni nanoparticles,but also provided hydrophobic sites for CF adsorption.The removal efficiency of CF by ACF-Fe/Ni decreased with the increase of solution pH,whereas the effect of initial pH on CF removal in the CMC-Fe/Ni system was indistinctive.The removal of CF was inhibited by coexisting ions,two of which,NO3-and HPO42-,the inhibitory effects were pronounced.Fe0 was tended to transfer iron sulfides in the presence of sulfides,greatly decreasing the reductive reactivity of Fe0-based nanoparticles.The pathway of CF degradation in ACF-Fe/Ni and CMC-Fe/Ni was proposed by single step dechlorination to form DCM and complete dechlorination to form non-chlorine products.
Keywords：Fe-based nanoparticles materialsstabilizationorganic pollutantschloroformreductive dechlorination
Publication Date：2023-08-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 181-188 )