Sub-topics Chemical characterization pH, TDS, EC, BOD, COD - - PowerPoint PPT Presentation

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Sub-topics Chemical characterization pH, TDS, EC, BOD, COD - - PowerPoint PPT Presentation

Mar 03, 2023 271 likes •353 views

28.9.2018 Lecture No. 17 Lecture Name: Geomaterial Characterization Sub-topics Chemical characterization pH, TDS, EC, BOD, COD Sulphite and Chloride contents Cation-Exchange Capacity

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SLIDE 1

Sub-topics

  • Chemical characterization

pH, TDS, EC, BOD, COD Sulphite and Chloride contents Cation-Exchange Capacity Pore-solution sampling Corrosion potential Sorption-Desorption

  • Thermal Characterization
  • Electrical Characterization

28.9.2018 Lecture No. 17 Lecture Name: Geomaterial Characterization

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SLIDE 2

CHEMICAL CHARACTERIZATION

  • X-Ray Fluorescence (XRF)
  • Inductively Coupled Plasma (ICP)
  • pH value
  • Cation Exchange Capacity (CEC)
  • Pore solution analysis
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SLIDE 3

XRF Pallets

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SLIDE 4

Inductively Coupled Plasma Unit AAS

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SLIDE 5

Elemental Composition (% by weight) of Materials

Material Element CS WC IC RSS BSS FA-I FA-II C-I C-II GGBFS Si 15.78 20.32 11.52 39.21 40.71 25.53 28.30 24.65 23.62 15.56 Al 5.75 17.77 1.67 2.65 3.29 15.95 15.92 20.70 21.92 8.59 Fe 8.23 1.09 1.19 0.50 0.94 2.51 2.31 1.38 1.81 0.25 Ti 1.53 2.88 0.03 0.22 0.14 2.12 1.45 1.15 1.02 0.37 S

  • 0.1
  • 0.01

0.23 0.11 0.03 0.39 Ca 4.58 0.27 38.9 001 0.01 3.20 0.11 0.06 0.10 26.50 K 0.54 0.06 0.13 2.42 1.49 0.77 0.55 1.07 1.14 0.19 Mg 0.99 0.45 0.48 0.09 0.19 0.33 0.24 0.41 0.24 5.52 P 0.07 0.02 5.0 0.01 0.02 0.18 0.25 0.12 0.06 0.02 Sr 0.02 0.00 0.14

  • 0.06

0.07 0.08 0.05 0.08 Ba

  • 0.66

0.07 0.11 0.12 0.06 Na 1.49 0.13

  • 0.04
  • 0.09

0.04 0.08 0.02 0.05 Mn 0.12 0.04 0.01

  • 0.04

0.03 0.01 0.01 0.01 0.01 Si +Al+Fe 29.76 39.18 14.39 42.35 44.94 43.98 46.54 46.74 47.35 24.41

XRF Studies

Calibration of XRF- Setup

  • Physical Calibartion
  • Chemical Calibration
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SLIDE 6

Material CEC(meq./100g) CS 18.6 WC 5.0 IC 12.6 RSS 3.5 BSS 3.4 FA-I 4.5 FA-II 5.2 C-I 3.9 C-II 4.1 GGBFS Not applicable

Cation-exchange Capacity

            

(g) sample

  • f

wt. 1000 cation the

  • f

weight Equivalent (ml) extract

  • f

Vol. 100 g/ml) ( Ca

  • f

ion Concentrat CEC

2

IS:2720

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SLIDE 7

pH determination

Glass calomel electrode is used Soil solutions with different Liquid to solid ratios pH Temperature Total Dissolved Solids Electrical Conductivity Chemical Oxygen demand Biological Oxygen Demand

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SLIDE 8

The chloride and sulphite contents of the soils can be obtained

  • n an extract of 2:1 Liquid to solid ratio.

Indion Easy test kit (Ion Exchange, India Ltd.), an ion exchange resin, is employed A sort of a titration Change in color of the solution due to addition of chemicals

Chloride and Sulphite contents determination