Abstract
In this paper, the removal of 2,4,6-trichlorophenol (2,4,6-TCP) by synthesized Ni/Fe nanoparticles were investigated. At the same time, the factors, such as the dosage of Ni/Fe, Ni content in Ni/Fe nanoparticles, sulfate ion, HA, coexisting substances in water which affected the removal of 2,4,6-TCP by synthesized Ni/Fe nanoparticles were also investigated. Under the experimental conditions, the removal efficiency of 2,4,6-TCP by Ni/Fe nanoparticles in water was about 72% for 2 h. The dosage of Ni/Fe, Ni content in Ni/Fe nanoparticles, and Fe3+all promoted the dechlorination reaction of 2,4,6-TCP by Ni/Fe nanoparticles. Sulfate, oxalic acid and citric acid played an inhibitory role on the removal of 2,4,6-TCP by Ni/Fe nanoparticles in water. Fe2+had no obvious affect to the removal of 2,4,6-TCP by Ni/Fe nanoparticles in water. In addition, low initial HA concentration was favorable for the removal of 2,4,6-TCP by Ni/Fe nanoparticles, while high concentrations of HA played an inhibitory role.
Highlights
Chlorophenol compounds are a class of widely used organic substances that are toxic to the environment and difficult to degrade
Many studies have pointed out that some of the chlorophenol compounds contain similar natural hormones to the human body, which would result in genetic diseases and cancer [1, 2]. 2,4-dichlorophenol, 2,4,6-TCP and pentachlorophenol, which are chlorophenol compounds, have been listed as priority pollutants in China due to their potential danger. 2,4,6-TCP is one of the phenol derivatives, and its molecular formula is C6H3Cl3O. 2,4,6-TCP can be used for antiseptic and sterilization, and it is widely used in organic synthesis in paper mills, printing and dyeing industries [3]
With Ni content increased from 1.0 % to 1.5 %, 2.0 % and 2.5%, the removal efficiency of 2,4,6-TCP by Ni/Fe nanoparticles first increased from 48% to 54%, and to 72% in 2h, at last reduced to 58%
Summary
Chlorophenol compounds are a class of widely used organic substances that are toxic to the environment and difficult to degrade. 2,4,6-TCP can be used for antiseptic and sterilization, and it is widely used in organic synthesis in paper mills, printing and dyeing industries [3] It has a damaging effect on the skin and mucous membranes, it can stay in the organism for a long time and is difficult to eliminate, having a certain impact on the growth and development of the organism. It has been identified as an environmental hormone substance that can cause great harm to the human body and environment as a persistent pollutant [4]. The removal of chlorophenol compounds in water or soil is an urgent problem to be solved urgently in today's environment
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