freundlich吸附等温线有什么实际意义

Drawing the iron 镧 changes sex 膨 smooth soil to adsorb isotherm,carrying on a data back to return to draw up to match with the Langmuir square distance and the Freundlich square distance.Express two square distances as a result all description iron with good ability 镧 to change sex 膨 smooth soil to adsorb deep red dyestuff result.Studying the iron 镧 changes sex 膨 smooth soil to adsorb dynamics,drawing iron 镧 to change sex 膨 smooth soil to adsorb dynamics curve.Carry on a data back to return to draw up to match with the Bangham square distance and the Langmuir square distance,express two square distances as a result all description iron with good ability 镧 to change sex 膨 smooth soil to adsorb deep red dyestuff regulation.From this,the iron 镧 changes sex 膨 smooth soil Be handling the dyestuff waste water contain very high application value,will get necessarily extensively applied.

朗格缪尔方程
弗朗德里希方程
泰民肯方程

Langmuir isotherm:c/(x/m)=1/ab+c/a ,
where c is concentartion of adsorbent,
x is amount of solute adsorbed by a mass(m)of adsorbent.
a and b are constant.
该公式可简化为y=z+mx,z=1/ab,m=1/a
Freundlich isotherm:
x/m=Kc(1/b) （1/b）是c的方
→→ log(x/m)=log(K)+(1/b)log(c) y=z+mx
m=(1/b)=3.7452,b=0.267
z=log(K)=0.0069,K=1.016
我们刚刚学到这一章,我也不知道这两个公式可以互换不,其实我也没太学懂.明天我可以去问问老师.

弗罗因德利希(Freundlich)经验式
●形式 Γ=x/m=kpn
式中,m为吸附剂质量,x为被吸气体物质的量或指定状态下的体积;n和k是两个经验常数
●讨论
——取对数,得 1g(Γ/[Γ])=1g(k/[k])十nlg(p/[p])
意义:以1g(Γ/[Γ])-lg(p/[p])作图,得一直线,斜率n,截距(1g(p/[p])=0处)lg(k/[k]).可求k和n
——可较好地用于单分子层吸附,特别是中压范围内
——形式简单,计算方便,应用广泛.但式中的常数没有明确的物理意义,不能说明吸附作用的机理

吸附曲线图（吸附时间-吸附量图）判断吸附是否饱和；
吸附等温线通常下有三种：
1.线性等温方程：Qe=k*Ce+a,
2.Langmuir等温方程：Ce/Qe=1/（Qm*Kl）+Ce/Qm；Qm为单层饱和吸附量；Kl为吸附平衡常数；
3.Freundlich等温方程：InQe=InKf+（1/n）InCe,式中Kf、n为Freundlich常数,与吸附剂、吸附质种类及温度有关.
分别用线性、Langmuir及Freundlich等温方程对实验数据进行拟合；找到与实验结果符合的等温方程；
再运用吉布斯方程ΔG0=－R*T*InKf可算出不同温度下的 ΔG0,；由In（K2/K1)=-ΔH0/R(1/T2-1/T1)和ΔG0=ΔH0－TΔS0 得到InKf=-ΔH0/RT+ΔS0 /R(式中：ΔG为吸附的标准自由能变,ΔH为标准吸附热,ΔS为吸附的标准熵变,R为气体摩尔常数,T 为绝对温度,Kf为吸附热力学平衡常数.）以lnKf对1/T作图,得一线性回归方程,从回归方程的斜率和截距求得ΔH0和ΔS0.