Study On The Adsorption Property Of Biological Activated Carbon To Antibiotic Pollutants

With the outbreak of various pollutants in the water quality included organic pollutants,the requirements of further promoting the removal of organic pollutants in the environment are put forward.The types of pollutants are complex.Antibiotics,as a new pollutant accompanied by drug abuse,are widely concerned by the scientific community.In the face of this phenomenon,it is urgent to develop an effective and environmentally friendly removal strategy.Adsorption technology will be one of the most promising,relatively fast and feasible options for implementation.From the most primitive activated carbon to innovative biochar and modified biochar,carbon-based materials have played an important role in the adsorption of antibiotics.In this paper,two kinds of natural biological base materials were selected.After high-temperature carbonization,powdered biological base activated carbon was formed.The two kinds of carbon base materials had abundant pore structure and hydrophilicity,which could better absorb antibiotic pollutants in the water environment.In this paper,two kinds of bio-based activated carbon were respectively used for antibiotic adsorption experiments,and guar gum activated carbon was combined with sodium alginate to make guar gum activated carbon pellets,which were conducive to recovery and regeneration.The adsorbent was characterized by scanning electron microscopy and BET surface area test.In addition to the adsorption capacity and structural characteristics of carbon-based materials,the potential adsorption mechanism and the influence of different concentrations of antibiotics in the adsorption process are also emphasized.The main research contents are as follows:?1?Through carbonization of miscanthus,the samples of miscanthus activated carbon were obtained,The XRD,SEM and Raman were used to characterize the composition,structure and morphology.It was found that the samples were consistent with the standard cards.The SEM image showed that the appearance of the samples was cylindrical strip,and the surface had abundant pore diameter,and the morphology distribution was relatively uniform.BET test results showed that miscanthus had a specific surface area of 305.64 m² g^-1,and the porous structure was similar to layered structure.The adsorption capacity of miscanthus activated carbon adsorbent calculated by Langmuir isotherm was 249mg g^-1.?2?Compared with the others,guar gum activated carbon has better adsorption performance.The adsorption capacity of guar gum activated carbon adsorbent calculated by Langmuir isotherm is 425mg g^-1.Through SEM characterization,it was found that not only the surface of the sample had abundant pore size,but also the interior of the sample had pore size,showing the phenomenon of large hole casing holes.Moreover,BET test results showed that guar gum activated carbon had a high specific surface area of 990 m² g^-1.This further verifies that the sample has more pore size.?3?The bio-based activated carbon prepared above is in powder form,which is not easy to recycle and repeat experiments.We selected guar guar gum activated carbon with good adsorption performance,combined with sodium alginate with gel ability,and then prepared guar guar gum activated carbon pellets by external emulsification method,and conducted repeated adsorption experiments of antibiotics.The experimental results showed that the bioactive carbon still maintained good adsorption performance after 8 times regeneration.