bulk adsorbent Articles

  • Impact of hydraulic loading rate and media type on removal of bulk organic matter and nitrogen from primary effluent in a laboratory-scale soil aquifer treatment system

    The effect of hydraulic loading rate (HLR) and media type on the removal of bulk organic matter and nitrogen from primary effluent during soil aquifer treatment was investigated by conducting laboratory-scale soil column studies. Two soil columns packed with silica sand were operated at HLRs of 0.625 and 1.25 m/d, while a third column was packed with dune filtering material and operated at HLR ...


    By IWA Publishing

  • Recycling and use of wastes/co-products from the iron/steel and alumina industries

    The current and potential uses for Blast Furnace (BF) slag, steel slag and red mud, and their environmental implications, are outlined and discussed as are the difficulties associated with red mud disposal and subsequent rehabilitation of the disposal sites. Whilst practicable bulk uses for the large amounts of slags that are produced have been found, the uses for red mud are limited and only ...


    By Inderscience Publishers

  • Removal of Cr from Synthetic Wastewater by Sorption into Volcanic ash Soil

    The possibility of using volcanic ash soils (VAS) or Andisols as a low-cost and natural adsorbent is investigated in this study for the removal of Cr (VI) from synthetic wastewater. Andisols can be used as adsorbent because they are characterized by the presence of non-crystalline secondary minerals such as allophane and imogolite that show variable charge characteristics and have the ability to ...

  • Automated Bag Handling System Eliminates Dust, Reduces Labor for Municipal Water Treatment Plant

    Two cities, one in the United States and the other in Canada, over 700 miles (1100 kilometers) apart, were experiencing nearly identical problems caused by manual addition of powdered activated carbon to their municipal water treatment systems.  Both cities not only eliminated a health hazard caused by carbon powder dust, but also reduced the amount of labor required to add powdered ...


    By Flexicon Corporation

  • Correlation between firing temperature and defluoridation capacity of brick clay

    The amount of fluoride ions adsorbed on laboratory fired brick clay varies with the initial concentration according to Type I adsorption isotherm for firing temperatures up to 700 °C, forming inner-sphere complexes between fluoride and mineral surfaces of brick clay. Type II isotherm is valid above this firing temperature forming outer sphere complexes. The turbidity of suspensions of low ...


    By Inderscience Publishers

  • Forward osmosis for the treatment of reverse osmosis concentrate from water reclamation: process performance and fouling control

    While high quality water reuse based on dual membrane filtration (membrane filtration or ultrafiltration, followed by reverse osmosis) is expected to be progressively applied, treatment and sustainable management of the produced reverse osmosis concentrate (ROC) are still important issues. Forward osmosis (FO) is a promising technology for maximising water recovery and further dewatering ROC so ...


    By IWA Publishing

  • What is zeta potential?

    Zeta potential is a measure of charges carried by particles suspended in a liquid (mostly water). Most particles suspended in water and wastewater, e.g. clays, silica, hydrated metal oxides, paper fibers, biological cells, etc., possess negative surface charges in the neutral pH range as shown in Fig. 1 (a simplified view of a particle in a suspension). The particle is said to carry a negative ...

  • Properties and Behavior of Nonhalogenated VOC`s

    An important consideration when evaluating a remedy is whether the compound is nonhalogenated or halogenated. A nonhalogenated compound is one which does not have a halogen (e.g., fluorine, chlorine, bromine, or iodine) attached to it. The vendor of the technology being evaluated must be informed whether the compounds to be treated are nonhalogenated or halogenated. In most instances, the vendor ...

  • Surface reaction and transport kinetics of hydrogen through palladium-based membranes under gas co-existing with hydrogen atmospheres

    In order to understand how gas co-existing with hydrogen affects the hydrogen permeability of a silver 23wt%-palladium membrane, the surface reaction of hydrogen was evaluated from the continuity of the surface reaction rate and the bulk diffusion flux of hydrogen based on the results of hydrogen-permeation measurements. The interference effect of the co-existing species was quantified as a ...


    By Inderscience Publishers

  • Gabion Mattress Deployment at Former Manufactured Gas Plant Site

    PROJECT: Island End River Sediment Cap LOCATION: Boston, MA RCM SQUARE FT: 35,000 ORGANOCLAY: 135,000 lbs CONTRACTOR: Sevenson Environmental Services, Inc. DESIGN CONSULTANT: Arcadis PRODUCTS: ORGANOCLAY®, REACTIVE CORE MAT®, TRITON® Marine Mattress ...


    By CETCO

  • Properties and Behavior of Halogenated VOCs

    An important consideration when evaluating a remedy is whether the compound is halogenated or nonhalogenated. A halogenated compound is one onto which a halogen (e.g., fluorine, chlorine, bromine, or iodine) has been attached. The nature of the halogen bond and the halogen itself can significantly affect performance of a technology or require more extensive treatment than for nonhalogenated ...

  • Gabion mattress deployment at former manufacutured gas plant site case study

    Project: Island End River Sediment Cap Location: Boston, MA Products: Organoclay Reactive Core Mat? Triton Marine Mattresses Background: The project is situated on a former manufactured gas plant (MGP) site located adjacent to the Boston Harbor. Previous remedial work included dredge and disposal in CAD cell and cap. ...


    By CETCO

  • Speciation and mobility of arsenic in agricultural lime

    Received for publication October 6, 2008. Agricultural liming materials are used to correct soil acidity and to improve plant growth and microbial functionality. A relatively low-grade agricultural lime was found to contain up to 125 mg kg–1 arsenic (As), which is above any fertilizing materials code threshold. The color of the milled material is brown due to ample oxide dendrites. Microprobe ...

  • Structure and properties of pure and mixed transition metal dimers on graphene

    Small Fe, Co and Ni clusters are known to exhibit high magnetic moments and are therefore investigated rather intensely for the purpose of developing novel magnetic materials with high magnetisation densities. The reduced bond density of these clusters compared to their respective bulk states, results in them being particularly sensitive to their environment. The choice of a substrate for these ...


    By Inderscience Publishers

  • Properties and Behavior of Nonhalogenated SVOCs

    Subsurface contamination by nonhalogenated SVOCs potentially exists in four phases: Gaseous phase: contaminants present as vapors in saturated zone. Solid phase: contaminants adsorbed or partitioned onto the soil or aquifer material in both saturated and unsaturated zones. Aqueous phase: contaminants dissolved into pore water according to their solubility in both saturated and ...

  • Halogenated Volatile Organic Compounds

    Sites where halogenated VOCs may be found include burn pits, chemical manufacturing plants or disposal areas, contaminated marine sediments, disposal wells and leach fields, electroplating/metal finishing shops, firefighting training areas, hangars/aircraft maintenance areas, landfills and burial pits, leaking collection and system sanitary lines, leaking storage tanks, radioactive/mixed waste ...

  • Properties and Behavior of Halogenated SVOCs

    An important consideration when evaluating a remedy is whether the compound is halogenated or nonhalogenated. A halogenated compound is one onto which a halogen ion(e.g., fluorine, chlorine, bromine, or iodine) has been attached. The nature of the halogen bond and the halogen itself can significantly affect performance of a technology or require more extensive treatment than for nonhalogenated ...

  • Quantitative application for OP/carbamate screen

    I. PURPOSE - The purpose of this document is to detail the standard operating procedure for the screening of cholinesterase inhibiting carbamate insecticides in fruits, vegetables, and feeds using the SDI Food Prep Kit and InQuest OP/Carbamate Screening Kit. NB - This is a screening technique designed to determine presence or absence of cholinesterase inhibiting ...


  • Bioremediation of an Oil Spill

    Bioremediation is the method of choice to effectively clean up a small spill of hydrocarbons. In this case, five-hundred liters of BTEX has spilled from an above ground storage tank into a pasture that is located at the west edge of the Royal Roads University (RRU) grounds. The soil is classified as a Gleyed Eutric Brunisol based on recent laboratory analysis; it contains clay, but is fairly ...


  • Data Requirements for Soil, Sediment, and Sludge

    Site soil conditions frequently limit the selection of a treatment process. Process-limiting characteristics such as pH or moisture content may sometimes be adjusted. In other cases, a treatment technology may be eliminated based upon the soil classification (e.g., particle-size distribution) or other soil characteristics. Soils are inherently variable in their physical and chemical ...

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