应用化工
應用化工
응용화공
Applied Chemical Industry
2015年
10期
1913-1915,1937
,共4页
袁胜%李梦耀%李扬%钱会%马岚
袁勝%李夢耀%李颺%錢會%馬嵐
원성%리몽요%리양%전회%마람
黄土性土壤%镉%吸附%动力学%热力学
黃土性土壤%鎘%吸附%動力學%熱力學
황토성토양%력%흡부%동역학%열역학
loess%cadmium%adsorption%kinetics%thermodynamics
采用静态吸附方法,研究了镉在黄土性土壤中的吸附动力学与热力学。研究表明,镉在黄土性土壤中吸附的动力学模型符合双常数方程,热力学模型符合 Langmuir 和 Freundlich 方程。随着吸附时间的增加,黄壤对镉的吸附量增加,在120 min 时基本达到平衡。黄壤中镉的浓度与吸附量成正相关,且在土壤表面,镉为单分子层吸附。Cd2+溶液中共存的 Mn2+、Ca2+、Na +等离子对黄壤吸附镉产生不同的影响。
採用靜態吸附方法,研究瞭鎘在黃土性土壤中的吸附動力學與熱力學。研究錶明,鎘在黃土性土壤中吸附的動力學模型符閤雙常數方程,熱力學模型符閤 Langmuir 和 Freundlich 方程。隨著吸附時間的增加,黃壤對鎘的吸附量增加,在120 min 時基本達到平衡。黃壤中鎘的濃度與吸附量成正相關,且在土壤錶麵,鎘為單分子層吸附。Cd2+溶液中共存的 Mn2+、Ca2+、Na +等離子對黃壤吸附鎘產生不同的影響。
채용정태흡부방법,연구료력재황토성토양중적흡부동역학여열역학。연구표명,력재황토성토양중흡부적동역학모형부합쌍상수방정,열역학모형부합 Langmuir 화 Freundlich 방정。수착흡부시간적증가,황양대력적흡부량증가,재120 min 시기본체도평형。황양중력적농도여흡부량성정상관,차재토양표면,력위단분자층흡부。Cd2+용액중공존적 Mn2+、Ca2+、Na +등리자대황양흡부력산생불동적영향。
Using the method of static adsorption,studying the adsorption kinetics and thermodynamics of cadmium in loess soils. Study shows that adsorption behavior of Cd2 + on loess soil in accordance with the two constant equation,thermodynamics model conforms to the Langmuir and Freundlich equation. With the increase of adsorption time,adsorption capacity of Cd2 + on loess soil will be increased,and it will reached equilibrium after 120 min. The adsorption capacity and consistence of Cd2 + in loess soil are positively cor-related,and on the soil surface,cadmium is single molecule layer adsorption. After studying the interfer-ence ions influence on the adsorption of Cd2 + in loess soil,the coexistence ions in Cd2 + solution such as Mn2 + ,Ca2 + and Na + have different effects on the adsorption of Cd2 + on loess soil.