应用化工
應用化工
응용화공
APPLIED CHEMICAL INDUSTRY
2014年
9期
1640-1643
,共4页
郭印丽%李梦耀%张晓松%袁胜%张海龙
郭印麗%李夢耀%張曉鬆%袁勝%張海龍
곽인려%리몽요%장효송%원성%장해룡
2,4-二氯苯酚%黄壤%吸附%解吸
2,4-二氯苯酚%黃壤%吸附%解吸
2,4-이록분분%황양%흡부%해흡
2,4-dichlorophenol%loess soil%adsorption%desorption
采用静态与动态实验相结合的方法,研究了2,4-二氯苯酚在黄土性土壤中的吸附和解吸规律,测定吸附动力学和吸附热力学曲线,获得吸附热力学模型。研究表明,2,4-二氯苯酚在黄土性土壤中吸附等温线可用 Freundli-ch 和 Langmuir 方程描述,其中 q0描述饱和吸附量,由 Langmuir 吸附等温式拟合数据可以看出:TS-2土的饱和吸附量大于 TM-1土(这是因为2,4-二氯苯酚在土壤中的吸附量与土壤中有机质的含量密切相关);由 Freundlich 吸附等温式拟合得到的常数,1/ n 均﹤1,证明是优惠吸附;根据吸附符合 Langmuir 方程,说明在土壤表面,2,4-二氯苯酚为单分子层吸附;吸附-解吸具有一定的可逆性,黄土性土壤对2,4-二氯苯酚的吸附能力不强,2,4-二氯苯酚极易穿透土壤,污染地下水。
採用靜態與動態實驗相結閤的方法,研究瞭2,4-二氯苯酚在黃土性土壤中的吸附和解吸規律,測定吸附動力學和吸附熱力學麯線,穫得吸附熱力學模型。研究錶明,2,4-二氯苯酚在黃土性土壤中吸附等溫線可用 Freundli-ch 和 Langmuir 方程描述,其中 q0描述飽和吸附量,由 Langmuir 吸附等溫式擬閤數據可以看齣:TS-2土的飽和吸附量大于 TM-1土(這是因為2,4-二氯苯酚在土壤中的吸附量與土壤中有機質的含量密切相關);由 Freundlich 吸附等溫式擬閤得到的常數,1/ n 均﹤1,證明是優惠吸附;根據吸附符閤 Langmuir 方程,說明在土壤錶麵,2,4-二氯苯酚為單分子層吸附;吸附-解吸具有一定的可逆性,黃土性土壤對2,4-二氯苯酚的吸附能力不彊,2,4-二氯苯酚極易穿透土壤,汙染地下水。
채용정태여동태실험상결합적방법,연구료2,4-이록분분재황토성토양중적흡부화해흡규률,측정흡부동역학화흡부열역학곡선,획득흡부열역학모형。연구표명,2,4-이록분분재황토성토양중흡부등온선가용 Freundli-ch 화 Langmuir 방정묘술,기중 q0묘술포화흡부량,유 Langmuir 흡부등온식의합수거가이간출:TS-2토적포화흡부량대우 TM-1토(저시인위2,4-이록분분재토양중적흡부량여토양중유궤질적함량밀절상관);유 Freundlich 흡부등온식의합득도적상수,1/ n 균﹤1,증명시우혜흡부;근거흡부부합 Langmuir 방정,설명재토양표면,2,4-이록분분위단분자층흡부;흡부-해흡구유일정적가역성,황토성토양대2,4-이록분분적흡부능력불강,2,4-이록분분겁역천투토양,오염지하수。
Studied the law of adsorption and desorption of 2,4-dichlorophenol in the loess soil,its curve of adsorption kinetics and thermodynamics and the adsorption thermodynamic model used by the combination of static and dynamic method. The study showed that the adsorption isotherm of 2,4-dichlorophenol in lo-ess soil can be depicted with Freundlich equation and Langmuir equation,q0 describes adsorption capacity between these figures,from the Langmuir adsorption isotherm fitting data can be seen:TS-2 soil saturated adsorption quantity of soil is greater than the TM-1(this is because 2,4-dichlorophenol adsorption in the soil is closely related to the content of organic matter in soil). Freundlich isotherm and Langmuir both could be better describe the 2,4-dichlorophenol adsorption behavior of the soil. From the Freundlich iso-therm fitting constants obtained can be seen,1 / n is less than 1 indicating preferential adsorption. If it meets the adsorption of Langmuir equation,it means that 2,4-dichlorophenol adsorption on the soil surface is a single molecular layer. Adsorption and desorption have a quantity of certain reversibility. The Loess soil does not has a function for the enrichment of 2,4-dichlorophenol,and the 2,4-dichlorophenol can penetrate the loess soil very easily. Inevitably,the groundwater will be contaminated by the 2,4-dichloro-phenol.