The outcome of their experimental work was that the main factor influencing the breakthrough time is the difference in viscosities between oil and water phase.
For column operation, central composite design (CCD) was applied to investigate the influence on the breakthrough time for optimization of As III) biosorption process and evaluation of interacting effects of different operating variables.
For column operation, CCD was applied to investigate the influence on the breakthrough time for optimization of As III) biosorption process and evaluation of interacting effects of three different operating variables.
For column operation, central composite design (CCD) in response surface methodology (RSM) was applied to investigate the influence on the breakthrough time for optimization and evaluation of interacting effects of different operating variables.
The CCD in RSM was designed for a set of three independent variables, viz., initial As III) concentration, flow rate, and biosorbent dose, to investigate their influence on the breakthrough time for continuous fixed-bed biosorption of As III) by AiBP.
A sensitivity analysis showed that external mass-transfer had a much stronger influence on the breakthrough curve than internal mass-transfer, confirming that the overall mass-transfer for toluene adsorption onto activated carbon fibers in fixed bed is controlled by external mass-transfer.
In addition, the flow rate and the initial goethite colloid concentration influenced the colloid breakthrough from the quartz column.
A parametric analysis has been carried out to study the influence of different variables on the breakthrough profile.
Input parameters, the Freundlich isotherm constants, and mass transfer coefficients for liquid- and solid-phase diffusion were determined and analysed for their influence on the shape of the breakthrough curve.
With the aid of a HITAC-8800 computhe, the influence of controlling variables of the breakthrough curves and temperature curves has been made clear for such parameters as solid phase mass transfer coefficient, overall heat transfer coefficient at the column wall, length of bed and the equilibrium isotherms.
