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为进一步利用广西大量的农业有机废弃物资源,实现资源和环境效益的最大化,采用恒温振荡吸附方法,研究蔗渣炭和玉米秸秆炭对NH4Cl溶液中铵氮的等温吸附特征、吸附动力学过程,分析吸附时间、初始液浓度、添加量对生物质炭吸附铵氮效果的影响。结果表明,蔗渣炭和玉米秸秆炭对铵氮的吸附平衡时间均为3 h,平衡吸附率分别为39.0%和41.3%。生物质炭对铵氮的吸附率随添加量的增加而增加,但单位吸附量随添加量的增加而减少。对铵氮的吸附符合Langmuir方程和Freundlich方程,蔗渣炭和玉米秸秆炭对铵氮最大吸附量分别为2.50mg/g和2.88 mg/g。总体上,玉米秸秆炭对溶液中铵氮的吸附性能优于蔗渣炭。
In order to further utilize a large amount of agricultural organic waste resources in Guangxi and achieve the maximization of resources and environmental benefits, the isothermal adsorption method was used to study the isothermal adsorption characteristics of ammonium nitrogen on bagasse and corn stalk carbon in NH4Cl solution, adsorption kinetics, The effects of adsorption time, initial concentration and dosage on the adsorption of ammonium and nitrogen by biomass carbon were analyzed. The results showed that the adsorption equilibrium time of ammonium and nitrogen for bagasse and corn stalk was 3 h, and the equilibrium adsorption rates were 39.0% and 41.3% respectively. The adsorption rate of ammonium to nitrogen by biomass charcoal increased with the increase of addition amount, but the adsorption amount decreased with the increase of addition amount. The adsorption of ammonium nitrogen conformed to the Langmuir equation and the Freundlich equation. The maximum adsorption capacities of ammonium bicarbonate and bagasse carbon were 2.50 mg / g and 2.88 mg / g, respectively. In general, corn stalk charcoal adsorption of ammonium nitrogen in solution is superior to bagasse charcoal.