Preparation of Reed Biochar and Study on Its Ammonia Nitrogen Adsorption Characteristics
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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