Abstract
Recently, biomass-based materials have attracted increasing attention because of their advantages of low cost, environment-friendly and nonpollution. Herein, the feasibility of using corn stalk biomass fiber (CF) and Fe3O4 embedded chitosan (CS) as a novel biomass-based adsorbent (CFS) to remove chloramphenicol (CAPC) from aqueous solution. Structure of CFS was characterized by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM) and zeta potential techniques. The effects of solution pH, adsorption time and ion strength on the adsorption capacity were examined. Adsorption isotherms obtained from batch experiments were better fitted by Langmuir model compared with Freundlich model, Dubinin–Radushkevich model and Temkin model. Adsorption kinetic data matched well to the pseudo-second order kinetic model. CAPC adsorption was endothermic, spontaneous, and entropy-increasing nature on CFS. In addition, the CFS could be separated by an external magnetic field, recycled, and reused without any significant loss in the adsorption capacity of CAPC. Based on these excellent performances, there is potential that CFS can be considered as a proficient and economically suitable material for the CAPC removal from the water environment.
Highlights
Chloramphenicol (CAPC, Figure S1a), as a famous antibiotic, plays an important role in poultry and aquaculture around the world to control the growth and quantity of bacteria [1,2]
Fourier transform infrared spectroscopy (FT-IR) spectra of corn stalk biomass fiber (CF) (a), chitosan (b), Fe3O4 (c) and CFS (d) materials are shown in FT-IR spectra of CF (a), chitosan (b), Fe3 O4 (c) and CFS (d) materials are shown in
The results suggested that the adsorption step of CAPC is an endothermic reaction and increasing temperature is benefit for fortifying the efficiency of adsorption
Summary
Chloramphenicol (CAPC, Figure S1a), as a famous antibiotic, plays an important role in poultry and aquaculture around the world to control the growth and quantity of bacteria [1,2]. In fresh water, CAPC was reported in Kenya, Korea, China, and. CAPC has been detected in soils in USA, Switzerland, Mongolia, China, and Germany, at concentrations ranging from 0.1 to 2683 ng/g. CAPC has been banned in many countries especially in the field of food-producing animals, because of its side effects, like aplastic anemia, potential carcinogenicity and genotoxicity, in human health [3]. If chloramphenicol is not treated effectively, it will eventually enter the environmental system. Chloramphenicol is often detected in environmental water of China [4,5]. It is urgent to establish an effective method to remove chloramphenicol from wastewater
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