biodegradable absorbent Articles
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Using constructed wetland systems to remove solids from highly polluted river water
The Erh-Ren River is located in southern Taiwan and is one of the most polluted rivers in Taiwan. A pilot-scale constructed wetlands (ERRCW) system containing a free surface flow wetland (FSF) followed by a subsurface flow wetland (SSF) was set up to treat the polluted river water. The system was designed to include solids removal. A removal efficiency of suspended solids (SS) in the ERRCW system ...
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Boundary value problem analysis of a tuned vibration absorber having non-linear springs
Non-linear dynamics of a two degrees-of-freedom (TDOF) tuned vibration absorber system using non-linear spring is studied as a boundary value problem. Five different combinations of linear and non-linear springs have been comprehensively analysed. For the different cases, a comparative study is made varying the forcing frequency. Another comparison is made for response versus time for different ...
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Native, acidic pre-treated and composite clay efficiency for the adsorption of dicationic dye in aqueous medium
Environmental applications of composites have attracted the interests of researchers due to their excellent adsorption efficiency for pollutants. Native, HCl pre-treated clay and MnFe2O4/clay composite were investigated as an adsorbent for removal of methyl green from aqueous solution. The adsorption behaviors of dye onto native, HCl pre-treated and composite clays were studied as a function ...
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Potentiality of open burnt clay as an adsorbent for the removal of Congo red from aqueous solution
Abstract: Open burnt clay was studied as a potential adsorbent for the adsorption of Congo red (a reactive dye) from aqueous solution. The effect of contact time, pH, adsorbent dosage and temperature were studied. It was observed that the amount of Congo red retained increase with decreasing pH and increasing initial concentration. Removal percentage at pH 2 and 3 are almost same. The ...
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Nitrate removal from natural water by coupling adsorption and Donnan dialysis
A hybrid adsorption/Donnan dialysis (DD) process for nitrate removal using PUROLITE A520E resin as an adsorbent was investigated in this work. PUROLITE resin was introduced into the DD process due to its good selectivity adsorption for nitrate and widespread availability. This study was conducted in order to benefit from each process, and it was an original and new combination. The retention ...
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Removal of carbamazepine from aqueous solution by adsorption on fly ash-amended soil
Carbamazepine (CBZ), nonbiodegradable pharmaceutical residue, has become an emerging pollutant in several aquatic environments. The effectiveness of the mixture of soil and fly ash (FA) in adsorbing CBZ from aqueous solution has been studied as well as agitation time, FA content, initial CBZ concentration and desorption as a function of FA content. The adsorption kinetics fits a hyperbolic or ...
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Organic matter removal in bio-filters to achieve biologically stable water downstream of the process
Organic removal contaminants reclamation has increased over the past years as it has many advantages over other treatments. Product water from water treatment plants can be chemically complex resulting in physical and biological changes during transportation in the distribution systems. The general aim of this study was to evaluate the effectiveness of biofilters for reducing the ...
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Coir Logs - A proven way to prevent soil erosion
The importance of soil was emphasised by The great Indian guru, Mahathma Gandhi, who said that ‘to forget how to tend the soil is to forget ourselves’. The Mahatma made this emphatic statement in order to stress the importance of soil. Soilprovidesecosystemservicescriticalforlife: soilactsasawaterfilterandagrowingmedium; provideshabitatforbillionsoforganisms, ...
By CoirGreen
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Adsorption of aniline onto hexagonal mesoporous silicate monoliths (HOM-2)
Hexagonally highly ordered monolithic mesoporous silica and aluminosilicate composites (HOM-2 and Al/HOM-2, respectively) were used as adsorbents for removal of aniline in aqueous solution. These HOM-adsorbents were fabricated by using a simple, reproducible and direct synthesis strategy in which instantly preformed liquid crystalline phase of Brij 56 (C16EO10) surfactant was used as templates. ...
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Treatment of wastewaters contaminated with zinc ions using natural zeolite as adsorbent in a fixed bed column
The potential of natural zeolite as a low-cost adsorbent was investigated for the removal of zinc from aqueous solution using a continuous fixed bed column. The zeolite tested was taken from the same source (Jabal Uniza in south Jordan) and subjected to crushing and sieving only, without any treatment. The two samples tested are UNZ1 (0.42–0.841 mm) and UNZ2 (0.21–0.42 mm). The Thomas model ...
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Adsorption of phenanthrene, 2‐naphthol, and 1‐naphthylamine to colloidal oxidized multiwalled carbon nanotubes: Effects of humic acid and surfactant modification
Carbon nanotubes (CNTs) can exist in the form of colloidal suspension in aquatic environments, particularly in the presence of natural organic matter or surfactants, and may significantly affect the fate and transport of organic contaminants. In the present study, the authors examined the adsorption of phenanthrene, 2‐naphthol, and 1‐naphthylamine to three colloidal CNTs, including a stable ...
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High adsorption capacity of MWCNTs for removal of anionic surfactant SDBS from aqueous solutions
Multi-walled carbon nanotubes (MWCNTs) are an effective adsorbent for removing various organic and inorganic contaminants because of their high surface area. In this study, MWCNTs were used to investigate the removal of sodium dodecyl benzene sulfonate (SDBS) in industrial wastewater. The effect of pH, adsorbent dosage, dispersion time and temperature on the kinetics and equilibrium of SDBS ...
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Modeling of chromium (VI) adsorption from aqueous solutions using Jordanian Zeolitic Tuff
The probable use of Jordanian natural zeolitic tuff in wastewater treatment as natural adsorbent for the removal of Cr (VI) ions from aqueous solution in continuous fixed bed columns was tested experimentally and theoretically. The tested zeolitic tuff was obtained from Al Hala volcano (HZ) located in southern part of Jordan and subjected to crushing and sieving only without any further ...
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Fate of effluent organic matter during soil aquifer treatment: biodegradability, chlorine reactivity and genotoxicity
Hydrophobic acid (HPO-A) and transphilic acid (TPI-A) fractions of dissolved organic matter (DOM) were isolated from a domestic secondary wastewater effluent that was polished via soil aquifer treatment (SAT). Fractions were isolated using XAD resin adsorption chromatography from samples obtained along the vadose zone flowpath at a full-scale basin recharge facility in Tucson, Arizona. Changes in ...
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Adsorption of 2-methylisoborneol and geosmin by a low-cost hybrid adsorbent synthesized from fly ash and bentonite
This paper describes the synthesis of a low-cost hybrid adsorbent from activation of fly ash and bentonite to remove 2-methylisoborneol (MIB) and geosmin from water. These substances produce objectionable taste and odor problems at levels as low as 4–10 ng/L and an effective, low-cost method of removal would be useful. The effect of the initial pH, contact time and adsorbent dosage on the ...
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Adsorption characteristics of Pb(II) from aqueous solutions onto a natural biosorbent, fallen arborvitae leaves
In this study, the potential of the oriental arborvitae leaves for the adsorption of Pb(II) from aqueous solutions was evaluated. Brunauer–Emmett–Teller analysis showed that the surface area of arborvitae leaves was 29.52 m2/g with pore diameter ranging from 2 to 50 nm. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy showed C—;C or C—;H, C—;O, and O—;C=O were the ...
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Fabrication Method of Quadcopter Vibration Isolator
Background technology of Quadcopter Vibration Isolator manufacture: Quadcopter includes some special equipment which need stable environment in work engineering, such as inertial measurement device. Influenced by the external air resistance and its own power plant, the four-axis vehicle will generate vibration excitation during flight and transmit it to the specific equipment, which will produce ...
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External and internal radiation doses due to alpha activity in Tafila district, Jordan
Tafila district of Jordan is unique in the presence of phosphate mines and hot spa which are the major sources of natural radioactivity. Natural radionuclides transfer from soil to vegetables grown in the region, and become a part of people's food. In this study, 16 soil and vegetable samples from Tafila district were collected from eight locations. External absorbed dose rates were calculated to ...
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Adsorption of arsenic in dacitic tuff pretreated with magnesium oxide
This study characterized a natural adsorbent material, a dacitic tuff, from Aguas Blancas in Zimapan Hgo. by emission spectroscopy of inductive coupling plasma, X-ray diffraction and scanning electronic microscopy. Also, the influences of concentration, contact time, and pH on the adsorption capacity of arsenic (As) on a dacitic tuff doped with MgO by batch technique were assessed. The results ...
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Performance improvement of TiO2 supported on adsorbents for photocatalytic degradation of MEK in air
Photocatalytic degradation of Methyl Ethyl Ketone (MEK) was carried out in gas phase using TiO2 supported on different adsorbents. Based on size and surface area, three different adsorbents, montmorillonite, β-zeolite and MCM-41 were tested. A fluidised bed annular photoreactor fitted with either 254 or 365 nm lamps was used for the photodegradation studies. The removal rates of MEK were higher ...
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