Preparation of Clay/Biochar Composite Adsorption Particle and Performance for Ammonia Nitrogen Removal from Aqueous Solution |
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| Institution: | College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100,China;Nanjing University of Information Science and Technology, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044,China;College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100,China;College of Marine Life Science, Ocean University of China, Qingdao 266003,China |
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| Abstract: | This study aimed to present a novel clay/biochar composite adsorption particle, which made from abandoned reed straw and clay to remove ammonia nitrogen(NH_4~+-N) from micro-contaminated water. The removal performance of NH_4~+-N by composite adsorption particle was monitored under different raw material proportions and initial NH_4~+-N concentration. Besides, adsorption kinetics and adsorption isotherms were investigated to reveal the adsorption mechanisms. The results showed that NH_4~+-N was effectively removed under optimal proportion of biochar, foaming agent and crosslinker with 20%, 3%, and 3%, respectively. The optimal contact time was 150 min and the best removal efficiency was 88.6% at initial NH_4~+-N concentration of 20 mg L~(-1). The adsorption performance was well described by the second order kinetic model and Freundlich model. The novel clay/biochar composite adsorption particle in this study demonstrated a high potential for NH_4~+-N removal from surface water. |
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