In order to solve the problem of resource utilization of waste aquatic plants,the biochar prepared by aquatic plants can be better uti-lized when absorbing NH4+-N in water,this paper used wetland reed as raw material to burn reed biochar,and explored the physical character-istics of reed biochar,under different experimental conditions,the adsorption characteristics of reed biochar to NH4+-N were studied.The results showed that the surface of reed biochar was elongated,rough and uneven,many small particles were attached,and it had a porous structure.The adsorption kinetics study showed that 6 hours was the optimal time parameter for reed biochar to adsorb NH4+-N,and the adsorption process was more in line with the quasi second order fitting equation.The isotherm study showed that 25℃could better describe the isotherm adsorption process of NH4+-N by reed biochar,and the isotherm adsorption behavior of reed biochar on NH4+-N was more in line with the Freundlich e-quation.
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