last progress report

7/31/2019 Last Progress Report

1/21

Candidate: Sandeep KumarGuided by: Dr. H. Bhunia

Registration: March 2006IRB : September 2006


2/21

Research ObjectivesResearch objectives

To study the kinetics of photocatalytic degradation of textile dye house effluent.To study the effect of various operating parametersaffecting performance.

Objective studied in last six months

Photocatalytic decolorisation and mineralization of mixed dyes.


3/21

Summary of last presentationOptimization study of Reactive Red 120 decolorisation

by design of experiment approach.


4/21

Work done in last six monthsDevelopment of methodology for analysis of mix dyes.

Adsorption studies of mix dyes.

Adsorption studies of individual dyes in mix dyes.

Catalyst load optimization for mix dyes.

Mineralization studies of mix dyes degradation by

photocatalysis(ongoing).


5/21

Analytical method: Dye conc.

measurement for mix dyesDye conc. measurement for mixed dyes.

Absorbance values were taken at 594nm and 524nm.

RR120 conc.= -0.02232+47.07*Abs.524 - 22.29*Abs.594

RB5 conc.=0.0048-1.36*Abs.524 + 43.75*Abs.594

Total dye conc.= RR12o conc.+ RB5 conc.


6/21

Statistical validation of method


7/21

Adsorption characteristics of mix dyes Adsorption characteristics of mix dyes

(RR120 and RB5)

0

5

10

15

20

25

30

35

40

4550

0 10 20 30 40 50 60 70 80 90 100

q ( m

g / g )

Ce (mg/l)


8/21

Adsorption characteristics of mix dyes

0, 00

5

10

15

20

25

30

35

40

0 5 10 15 20 25 30 35 40 45

q ( m

g / g )

Ce (mg/l)

RR120


9/21

Adsorption characteristics of mix dyes

0, 00

2

4

6

8

10

12

14

16

0 10 20 30 40 50 60

q ( m

g / g )

Ce (mg/l)

RB5


10/21

Adsorption isotherms y = 0.0172x + 0.2065

R = 0.9959

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

0 10 20 30 40 50 60 70 80 90 100

C e / q e

Ce (mg/l)

Langmuir isotherm for total dye adsorption in dye mix


11/21

Adsorption isotherms

y = 0.0233x + 0.0225

R = 0.9991

0

0.2

0.4

0.6

0.8

1

1.2

0 5 10 15 20 25 30 35 40 45

C e / q e

Ce (mg/l)

Langmuir isotherm for RR120 in mix dye


12/21


y = 0.3872x - 8.4777R = 0.832

0

2

4

6

8

10

12

14

0 10 20 30 40 50 60

C e / q e

Ce (mg/l)

Langmuir isotherm for RB5 dye in dye mix


13/21


y = -1.5212x + 3.2504

R = 0.8296

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8

l o g q

log Ce

Freundlich isotherm for RB5 in dye mix


14/21

Decolorisation of dyes mix

0

10

20

30

40

50

60

-40 -30 -20 -10 0 10 20 30 40 50 60 70

D y e c o n c .

( m g /

l )

Time (minute)

RB5

RR120


15/21


0

10

20

30

40

50

60

-40 -30 -20 -10 0 10 20 30 40 50 60 70

D y e c o n c .

( m g /

l )

Time (minute)

RB5

RR120


16/21



17/21


0

10

20

30

40

50

60

-40 -30 -20 -10 0 10 20 30 40 50 60 70

D y e c o n c .

( m g /

l )

Time (minute)

RB5

RR120


18/21

Decolorisation of dyes mix with

different catalyst loading

0

20

40

60

80

100

120

-40 -30 -20 -10 0 10 20 30 40 50 60 70

0.25 g/l 0.5 g/l 0.75 g/l 1.0 g/l 1.25 g/l 1.5 g/l 2.0 g/l


19/21

Pseudo first order decolorisation kineticsy = 0.0056x

R = 0.94

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0 10 20 30 40 50 60 70

- l n

( C / C o

)

Time (minute)


20/21

Catalyst load optimization

0

0.005

0.01

0.015

0.02

0.025

0 0.2 0.4 0.6 0.8 1 1.2

k a p p

( m i n u

t e )

Catalyst load (g/l)

Optimum catalyst load for RR120 and RB5 mix dye


21/21

Thanks

last progress report

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