S.A Tantawy

5 Questions 2 Answers 0 Followers

Questions related from S.A Tantawy

Can k2 in pseudo second order be negative?

after plot t/qt vs t and calculate intercept , slope i found k2 negative value is that possible ?

02 July 2017 3,010 2 View

Determined pseudo first order

to determined pseudo first order i follow this equation log(qe-qt)=log qe-k1t/2.303 but i found qe is lower than qt what can i do to plot log(qe-qt) versus t?

23 May 2017 595 5 View

I get negative value of absorbance of dye solution what can i do?

i add substance with ph = 11 to study the effect of ph on adsorption of dye on surface but i get negative value of absorbance using uv spectrophotometer after shaking 1 hour

16 May 2017 3,381 3 View

How can measure amount of acid and base site of surface?

i work in a composite with zno

12 May 2017 9,817 1 View

I need to use the adsorbate again after dye adsorbed on it how that?

i need that plz

17 April 2017 7,959 7 View