Abstract
In this paper, waste coconut shells are used as raw materials to prepare the corresponding bio-char (BC), and further prepare magnetically modified magnetic bio-char (MBC), and explore the adsorption of BC and MBC on the amount of adsorbent, adsorption time and pH. The recyclability of BC and MBC were contrasted. The results of the study found that compared to BC, the magnetically modified MBC has a larger specific surface area and richer functional groups, which provides more adsorption sites for the adsorption and removal of tetracycline. It can be used in different adsorbent dosages and adsorption times. Under the conditions of pH and pH, it shows better adsorption performance. In addition, MBC has better recycling properties than BC, which has higher application prospects. This research provides a theoretical basis for the utilization of waste resources and the removal of antibiotics in wastewater.
Highlights
In recent years, with the abuse of antibiotics, a large number of antibiotics have entered the water environment
An ultraviolet-visible spectrophotometer was used to measure the absorbance of the standard solution at 355 nm, and a standard curve was drawn from the absorbance and the mass concentration of Tetracycline antibiotics (TCs)
Add different masses of BC and magnetic bio-char (MBC) to a 100 mg/L tetracycline solution, and you can see the effect of BC and MBC dosage on TC adsorption as shown in the figure
Summary
With the abuse of antibiotics, a large number of antibiotics have entered the water environment. How to efficiently and quickly remove residual TCs and other antibiotic pollutants in the environment has become an environmental problem that needs to be solved urgently. Bio-char is a kind of porous carbon material formed by high temperature pyrolysis of biomass under anaerobic or anaerobic conditions. It has high specific surface area, porosity and abundant functional groups, and has a wide range of sources and simple preparation process. It has been successfully used in the treatment of wastewater, and creating great possibilities for the resource utilization of waste biomass. This study intends to combine bio-char and magnetic materials to make a magnetic bio-char composite material, to investigate its adsorption capacity for antibiotics under different conditions, and to provide theoretical basis and technical support for the removal of antibiotics
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