The Treatment of Cadmium Plating Wastewaters by Activated Carbon Adsorption

Microbial Reaction Rate Expressions
The subject of this technical note is the equation of saturation kinetics that has been used to describe adsorption, enzyme conversions, microbial growth, and other rate phenomena. All...

Predictive Model for Design of Fixed-Bed Adsorbers: Single-Component Model Verification
A predictive mathematical model for fixed-bed adsorber design that incorporates both liquid and solid phase resistances to mass transfer is verified for four different single-component...

Removal of Cadmium (II) by Activated Carbon Adsorption
The adsorption of cadmium (II) from a dilute aqueous solution onto an activated carbon surface is investigated. The type and dose of activated carbon, the total concentration of cadmium...

Model for Design of Multicomponent Adsorption Systems
A predictive model for design of fixed-bed adsorbers for treatment of multicomponent waters and wastewaters is developed and compared to data from experimental systems. The model incorporates...

Virus Sampling in Wastewater - Field Experiences
Membrane adsorption, chemical precipitation, and soluble alginate filtration methodologies have been combined in the development of a relatively simple yet sensitive procedure for detecting...

Nonlinear Adsorption in Layered Porous Media Flow
Dispersion and adsorption of solute in multilayer saturated porous media with constant specific discharge are examined in the present work. Differential equations are formulated for describing...

Solution for Radial-Flow with Nonlinear Adsorption
A nonlinear convective diffusion equation is obtained for a radial flow with Freundlich equilibrium adsorption. Numerical solution by explicit or implicit finite difference approximation...

Influence of Activated Sludge CRT on Adsorption
The adsorbability of organic compounds in the effluent from an activated sludge process was examined as a function of cell residence time (CRT). The concentration of nonadsorbable organic...

Radial Dispersion Through Adsorbing Media
The convective-dispersion equation for the transport of a radioactive tracer through an adsorbing porous medium is solved in the cylindrical polar system of coordinates by the Galerkin...

Transient Dispersion in Uniform Media Flow
Analytical solutions are developed for the transient dispersion from a finite line source or a rectangular plane source in saturated steady uniform porous media flow. The sources are oriented...

Biosorption Isotherm for Uranium Recovery
Like carbon adsorption, biosorption has been extensively used to remove organics other pollutants from wastewater. A well-known example is activated sludge process where organics in indicated...

Fate of Wastewater Bacteria and Viruses in Soil
Bacterial survival in soil is affected by moisture content, temperature, organic matter, and antagonism by soil microflora. In most instances the survival of bacterial pathogens in the...

Removal of Organic Matter by Activated Carbon Columns
This study shows that the major organic fraction in activated sludge effluent that exhibited a high adsorption in activated carbon columns is a fulvic acid-like material with a molecular...

Improving Mercury (II) Removal by Activated Carbon
Research was performed to evaluate the effectiveness of mercury (II) removal from water by activated carbon with and without chemical aids. Batch tests, adsorption isotherms, and column...

Estimation of Estuarine Marsh Productivity
The adsorptive and absorptive capabilities of tidal marshlands have been estimated using various techniques. Thus far, measuring that portion of organic matter (soluble and solid) representative...

Dispersion in Natural Streams
The one-dimensional mathematical model of dispersion has been developed to account for the loss of dye due to decay and adsorption. This model predicts the time-concentration of the conservative...

Destruction of Bacteria and Viruses in Seawater
Marine microbial predators destroy enteric bacteria in seawater. Viruses are destroyed by unknown marine microbial antagonists and by a toxic chemical component of the seawater. Viruses...

Batch Adsorption Kinetics in Sewage—Activated Carbon
Batch adsorption experiments using a well-mixed system of secondary effluent domestic waste water and granular activated carbon were performed, and the rate of decay of organic contaminants...

Analytic and Process Classification of Effluents
The residual organics in effluents are classified using analytic and process techniques for component identification. There are residual organics in biologically treated effluents that...

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