现代地质
現代地質
현대지질
GEOSCIENCE-JOURNAL OF GRADUATE SCHOOL CHINA UNIVERSITY OF GEOSCIENCES
2015年
2期
377-382
,共6页
李国傲%陈振贺%刘志富%李烨
李國傲%陳振賀%劉誌富%李燁
리국오%진진하%류지부%리엽
土霉素%潮土%吸附特性%北京
土黴素%潮土%吸附特性%北京
토매소%조토%흡부특성%북경
oxytetracycline%fluvo-aquic soils%adsorption%Beijing
北京近1/4区域土壤属于潮土,潮土对四环素类抗生素的吸附特性还鲜有报道。采用OECD Guideline 106的方法,研究土霉素在北京地区潮土上的吸附特性。结果表明,土霉素在潮土中的吸附动力学过程符合Elovich方程,土霉素初始浓度会影响吸附速率,2 mg/L时最大,10 mg/L时最小。吸附百分比随着初始浓度的升高,先增大后减小。温度和平均吸附速率呈负相关。实验浓度下,吸附等温线符合线性等温方程和Freundlich方程,吸附是自发的吸热反应。潮土对土霉素的吸附量和粉粒及黏粒含量之和呈正相关。土霉素在潮土中的吸附受初始浓度、温度、土壤性质等因素的影响,深入了解其作用机理,有助于防治土霉素污染,保护土壤安全。
北京近1/4區域土壤屬于潮土,潮土對四環素類抗生素的吸附特性還鮮有報道。採用OECD Guideline 106的方法,研究土黴素在北京地區潮土上的吸附特性。結果錶明,土黴素在潮土中的吸附動力學過程符閤Elovich方程,土黴素初始濃度會影響吸附速率,2 mg/L時最大,10 mg/L時最小。吸附百分比隨著初始濃度的升高,先增大後減小。溫度和平均吸附速率呈負相關。實驗濃度下,吸附等溫線符閤線性等溫方程和Freundlich方程,吸附是自髮的吸熱反應。潮土對土黴素的吸附量和粉粒及黏粒含量之和呈正相關。土黴素在潮土中的吸附受初始濃度、溫度、土壤性質等因素的影響,深入瞭解其作用機理,有助于防治土黴素汙染,保護土壤安全。
북경근1/4구역토양속우조토,조토대사배소류항생소적흡부특성환선유보도。채용OECD Guideline 106적방법,연구토매소재북경지구조토상적흡부특성。결과표명,토매소재조토중적흡부동역학과정부합Elovich방정,토매소초시농도회영향흡부속솔,2 mg/L시최대,10 mg/L시최소。흡부백분비수착초시농도적승고,선증대후감소。온도화평균흡부속솔정부상관。실험농도하,흡부등온선부합선성등온방정화Freundlich방정,흡부시자발적흡열반응。조토대토매소적흡부량화분립급점립함량지화정정상관。토매소재조토중적흡부수초시농도、온도、토양성질등인소적영향,심입료해기작용궤리,유조우방치토매소오염,보호토양안전。
Nearly 25%of the total area in Beijing is fluvo-aquic soils,whose adsorption characteristics of tetra-cycline antibiotics have not been investigated.This research,with the help of OECD Guideline 106,investiga-ted the absorption characteristics of oxytetracycline in the fluvo-aquic soils in Beijing.Our research found that the adsorption kinetics of oxytetracycline in the fluvo-aquic soils is correspond to Elovich equation.The initial concentration of oxytetracycline will affect the adsorption rate.Absorption rate reaches the maximum when the concentration is 2 mg/L and the minimum when 10 mg/L.For absorption percentage,as initial concentration increases,the adsorption percentage first increases and then decreases.The relationship between temperature and average absorption rate is negatively correlated.In our experimental context,the adsorption isotherm is con-sistent with both linear adsorption isotherm equation and Freundlich isotherm equation.The adsorption is a spontaneous endothermic reaction.Fluvo-aquic soils adsorption capacity of oxytetracycline has a positive relation with the content of silt and clay.Adsorption of oxytetracycline on fluvo-aquic soils was affected by initial con-centration,temperature,and soil properties.It is helpful to control pollution of oxytetracycline and protect soils if the mechanisms are understood deeply.