Molybdenum (VI) biosorption process was investigated by marine algae Cystoseria indica pretreated with 0.1 M CaCl2 solution in a packed bed column. The biosorbent was characterized by FTIR, BET and SEM analyses. The results showed that Mo (VI) ions should be chelated with the hydroxyl, carboxyl and amine groups of the biomass. The effects of inlet metal concentration and flow rate on biosorptio...

The present paper focuses on solute transport behaviour in a Model Heterogeneous Porous Medium (MHPM) under different flow rates. We report tracer experiments stationary hydraulic conditions, with 7 rates spanning two orders of magnitude. Several replicates are carried out several MHPMs, allowing for sound statistical assessment experimental imprecision. BreakThrough Curves (BTCs) exhibit dual ...

One-dimensional solute transport modeling is fundamental to enhance understanding of river mixing mechanisms, and useful in predicting concentration variation fate rivers. Motivated by the need more adaptive efficient model, an exact solution for simulating breakthrough curves that vary with non-Fickian natural streams was presented, which based on existing implicit advection-dispersion equatio...

In the last decades, numerical modeling has been developed as the common method to investigate solute transport in groundwater. Thereby in science, various numerical procedures have been applied for understanding complex processes of transport in highly heterogeneous aquifers. Beside this, numerical modeling of transport is also standard practice in engineering and consulting. The numerical app...

1. Free water clearances were measured during infusion of hypotonic saline, glucose, urea, and mannitol in Brattleboro rats. For each solute the free water clearances were plotted using either V or (C(H2O) + C(Na)) as the distal tubular delivery term.2. In all cases the use of (C(H2O) + C(Na)) as distal delivery term yielded a steeper relationship than when V was used. There were no significant...

  Background:The dynamic binding capacity (DBC) of a chromatography matrix in protein purification is the amount of the total protein absorbed into the matrix, before occurrence of a significant break in the breakthrough curve. Optimization of the process criteria for maximum DBC avoids extra process scale-up and reduces ...