CAJ | 학술논문

为有效提高生活垃圾填埋场渗沥液的C/N,增加渗沥液的可生化性,应用粉煤灰吸附处理实际渗沥液中的氨氮,分别研究投加量,温度,pH值对吸附效果的影响,并在最佳吸附条件下对吸附过程进行动力学分析.结果表明,反应180min时,吸附达到平衡,氨氮去除率达到63.44%,单位吸附量为8.7428mg/g,可有效地调节渗沥液的营养比例,有利于生物处理作用;动力学数据拟合吸附过程符合伪二级动力学方程;动边界模型推算表明,液膜扩散为吸附过程的速度控制步骤;采用Dünwald-Wagner公式,估算有效扩散系数(Dc)为3.058×109cm2/s.
위유효제고생활랄급전매장삼력액적C/N,증가삼력액적가생화성,응용분매회흡부처리실제삼력액중적안담,분별연구투가량,온도,pH치대흡부효과적영향,병재최가흡부조건하대흡부과정진행동역학분석.결과표명,반응180min시,흡부체도평형,안담거제솔체도63.44%,단위흡부량위8.7428mg/g,가유효지조절삼력액적영양비례,유리우생물처리작용;동역학수거의합흡부과정부합위이급동역학방정;동변계모형추산표명,액막확산위흡부과정적속도공제보취;채용Dünwald-Wagner공식,고산유효확산계수(Dc)위3.058×109cm2/s.
To effectively improve the C/N and increase the biodegradability ofthe landfill leachate,fly ash was chosen as sorbent to treating ammonia-nitrogen in leachate.The effect of dosage,temperature and pH on adsorption of NH3-N onto fly ash were separately studied,kinetics analysis was used for the adsorption process in the optimum adsorption conditions.Experiment results showed that fly ash had the better adsorption ability of treating ammonia-nitrogen in leachate,the adsorption equilibrium time was 180min,then the removal rate of ammonia-nitrogen was 63.44%,the equilibrium adsorption capacity was 8.7428mg/g.Linearizations of the different kinetic equations showed that adsorption process in line with the pseudo-secondary kinetic equation;Moving boundary model analysis showed that the adsorption formula,estimated the effective diffusion coefficient (Dc) was 3.058× 10-9cm2/s.