中国环境科学
中國環境科學
중국배경과학
CHINA ENVIRONMENTAL SCIENCE
2014年
1期
85-90
,共6页
T酸废母液%蒸氨%氨氮%动力学%活化能%指前因子
T痠廢母液%蒸氨%氨氮%動力學%活化能%指前因子
T산폐모액%증안%안담%동역학%활화능%지전인자
T-acid crystallization liquor%ammonia evaporation%ammonia nitrogen%kinetics%activation energy%pre-exponential factor
为了有效降低经络合萃取处理后的T酸废母液中氨氮和总氮的浓度,为后续生物处理创造条件,对T酸母液进行Fenton氧化和蒸氨预处理,讨论了Fenton氧化、pH值、气液比、温度和反应时间对氨氮和总氮去除效果的影响.结果表明,Fenton氧化降低了T酸废母液的氨氮浓度,有利于氨氮和总氮的去除,去除率增幅明显.蒸氨过程中,氨氮和总氮的去除率随着pH值、温度和气液比的增大而升高,在pH值为11,气液比为3000,温度为95℃的条件下反应120min,氨氮去除率大于99%,总氮去除率大于97%.蒸氨预处理的氨氮去除动力学方程符合一级反应动力学,反应速率常数为 k=0.00883min-1.反应的阿伦尼乌斯方程为：ln(k)=-1.97161-1016.5026/RT,R2=0.9959,反应活化能为8451.20J/mol,指前因子为0.139min-1.蒸氨是处理高氨氮T酸废母液有效手段,有工业应用价值.
為瞭有效降低經絡閤萃取處理後的T痠廢母液中氨氮和總氮的濃度,為後續生物處理創造條件,對T痠母液進行Fenton氧化和蒸氨預處理,討論瞭Fenton氧化、pH值、氣液比、溫度和反應時間對氨氮和總氮去除效果的影響.結果錶明,Fenton氧化降低瞭T痠廢母液的氨氮濃度,有利于氨氮和總氮的去除,去除率增幅明顯.蒸氨過程中,氨氮和總氮的去除率隨著pH值、溫度和氣液比的增大而升高,在pH值為11,氣液比為3000,溫度為95℃的條件下反應120min,氨氮去除率大于99%,總氮去除率大于97%.蒸氨預處理的氨氮去除動力學方程符閤一級反應動力學,反應速率常數為 k=0.00883min-1.反應的阿倫尼烏斯方程為：ln(k)=-1.97161-1016.5026/RT,R2=0.9959,反應活化能為8451.20J/mol,指前因子為0.139min-1.蒸氨是處理高氨氮T痠廢母液有效手段,有工業應用價值.
위료유효강저경락합췌취처리후적T산폐모액중안담화총담적농도,위후속생물처리창조조건,대T산모액진행Fenton양화화증안예처리,토론료Fenton양화、pH치、기액비、온도화반응시간대안담화총담거제효과적영향.결과표명,Fenton양화강저료T산폐모액적안담농도,유리우안담화총담적거제,거제솔증폭명현.증안과정중,안담화총담적거제솔수착pH치、온도화기액비적증대이승고,재pH치위11,기액비위3000,온도위95℃적조건하반응120min,안담거제솔대우99%,총담거제솔대우97%.증안예처리적안담거제동역학방정부합일급반응동역학,반응속솔상수위 k=0.00883min-1.반응적아륜니오사방정위：ln(k)=-1.97161-1016.5026/RT,R2=0.9959,반응활화능위8451.20J/mol,지전인자위0.139min-1.증안시처리고안담T산폐모액유효수단,유공업응용개치.
For the purpose of reducing the concentration of ammonia nitrogen and total nitrogen of spent liquor of T acid crystallization, which was pre-treated by complex extraction process, Fenton oxidation and ammonia evaporation was tested in order to create the favourable condition for the following biological treatment. The influence of fenton oxidation, pH, gas-liquid volume ratio, temperature and reaction time on the removal efficiency of ammonia nitrogen and total nitrogen was investigated. The experimental results showed that concentration of ammonia nitrogen was reduced by Fenton oxidation, which enhanced the removal of ammonia nitrogen and total nitrogen. The removal of ammonia nitrogen and total nitrogen increased significantly after Fenton oxidation. It was found that the removal of ammonia nitrogen and total nitrogen increased with increasing pH, temperature and gas-liquid volume ratio. The removal of ammonia nitrogen exceeded 99% and total nitrogen exceeded 97% at pH 11, gas-liquid volume ratio of 3000, temperature of 95℃and 120min of reaction time. It was also found that ammonia removal rate of spent liquor of T-acid crystallization by evaporation followed the first-order kinetic equation and the reaction rate constant k was 0.00883min-1. The Arrhenius equation was fitted as ln(k)=-1.97161-1016.5026/RT, R2=0.9959, where the activation energy was 8451.20J/mol and the pre-exponential factor was 0.139min-1. It was concluded that ammonia evaporation was the effective method of treating spent liquor of T-acid crystallization containing high concentration of ammonia nitrogen and may be applied in industry.
