Pore Volume in Column Experiment

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Currently I am doing a column experiment. To analyse the result I will plot the breakthrough curve graph. There are several questions I have regarding this graph: which graph is suitable to represent heavy metal mobilization in soil?
1. concentration versus pore volume or
2. concentration versus time?
Also, how do I get the best result for pore volume value?

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5 Answers

  1. Pore Volume (PV) is defined as the ratio of a porous material's air  volume  to a porous materials total volume . ... For our purposes, the total  volume  of a part is described by the amount of space contained within an imaginary film that has been tightly shrunken around the outside of the porous part's exterior geometry.

    The analyze concemtration charges of solute in effluent form a soil column a breakthrough curve can be plot of ratio C/Co Vs the number of pore volume of effluent collect.Here C is the comcentration of solute found in the effluent. And Co is the initial concentration of solute. For detail please find attached herewith following links,

     

    https://books.google.co.in/books?id=NUcoZNPMQEEC&pg=PA175&lpg=PA175&dq=Pore+Volume+concentration+%E2%80%8Band+pore+%E2%80%8Bvolume&source=bl&ots=5XaHNNj9XD&sig=0F7FUdJ1dgvMr5LTdPXLBAQ4MF0&hl=en&sa=X&ved=0ahUKEwjYkuazmvnTAhUHNo8KHTijA3AQ6AEIYDAG

     

     

     

     

     

    https://books.google.co.in/books?id=txPjGytEGioC&pg=PA81&lpg=PA81&dq=heavy+%E2%80%8Bmetal+%E2%80%8Bmobilization+in+%E2%80%8Bsoil,%E2%80%8Bpore+volume&source=bl&ots=5qcJl-hCU5&sig=qlSX2QOUMtLifPl4oJxkBWfbZGw&hl=en&sa=X&ved=0ahUKEwjau8LW6vjTAhXFLo8KHc6fAOsQ6AEIMDAB

     

    https://books.google.co.in/books?id=XZt0yWsi_JcC&pg=PA50&lpg=PA50&dq=heavy+%E2%80%8Bmetal+%E2%80%8Bmobilization+in+%E2%80%8Bsoil,%E2%80%8Bpore+volume&source=bl&ots=S1mADcwPIQ&sig=NMxU3G8uROL2qcLi8ZoxV6FIJu0&hl=en&sa=X&ved=0ahUKEwjau8LW6vjTAhXFLo8KHc6fAOsQ6AEIMjAC

     

     

    https://books.google.co.in/books?id=lyM6SgHXimEC&pg=PA160&lpg=PA160&dq=heavy+%E2%80%8Bmetal+%E2%80%8Bmobilization+in+%E2%80%8Bsoil,%E2%80%8Bpore+volume&source=bl&ots=R-qsobiMY_&sig=RtgS2o5pcmpi_vL1a_BmEplC2sQ&hl=en&sa=X&ved=0ahUKEwjau8LW6vjTAhXFLo8KHc6fAOsQ6AEINjAD

    https://books.google.co.in/books?id=39jZ7C3T0b8C&pg=PA42&lpg=PA42&dq=heavy+%E2%80%8Bmetal+%E2%80%8Bmobilization+in+%E2%80%8Bsoil,%E2%80%8Bpore+volume&source=bl&ots=iGCac4RkvH&sig=fjOOaayXDmpPnsAnJ3G6a52U5UE&hl=en&sa=X&ved=0ahUKEwjau8LW6vjTAhXFLo8KHc6fAOsQ6AEIOTAE

     

    1 Comment

    1. thank you sir

       

  2. You might like to plot concentration versus time for a breakthrough curve. A good explanation of the principles is found in the chapter on adsorption of a book titled: Unit operations of chemical engineering by McCabe.

    1 Comment

    1. hank you sir

       

  3. I recommend expressing concentration as a mobile fraction  i.e.  expressing mass of metal mobilised, normalised to sample mass, with a mobile fraction expressed in mg/kg. This tends to eliminate differences in liquid to solid ratios, flow rates and so on.

    The pore volume in a column is very dependent on how the column has been packed and may or may not represent the pore fraction in the undisturbed soil. It's often easiest to use simple methods.

    One other thing, I try and avoid using the term "heavy metal" outside its musical context. Have a look at:

    Duffus, J H. ""Heavy Metals" - a Meaningless Term? (Iupac Technical Report)." Pure and Applied Chemistry 74, no. 5 (2002): 793-807.
     

  4. The theme is about mass transfer by filtration through a fixed bed. The most appropriate graph is: concentration versus time. The optimization of the operating system is obtained through a porous bed without high pressure losses, but also that it has a good flow velocity, because if we increase the speed too much, we lose in the capacity to remove the metal. Other important variables in the process are pH, adsorbent type and temperature. Therefore, it is necessary to perform a statistical response surface study to optimize the removal process.

  5. I would google "Equilibrium Isotherm" and look at the many options to display your results, also consider adding "Empty Bed Contact Time" as another unit of measurement.