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Adsorption of Particle an overview ScienceDirect Topics

In contrast, the adsorption of electron-donating particles, such as alkaline metal atoms on the surface (110) plane of nickel and silver, accelerates the surface reconstruction from (1 × 1) to (1 × 2). Further, there are cases in which the chemisorption of particles produces a superlattice different from the original or reconstructed superlattice on the solid surface [Van Hove, 1993].

Direct observation of critical adsorption on colloidal

adsorption-relevant length-scales, it cannot be easily extended to colloidal particles with curved surfaces. It is important to note that the study of adsorption on curved surfaces intro-duces additional degrees of complexity, since adsorption phe-nomena are expected to

Thermodynamics and Kinetics of Adsorption

Thermodynamics of adsorption • Adsorption as a macroscopic (thermodynamic) phenomenon overcome, and the desorbing particles then possess more energy than they had if they were in thermal equilibrium with the surface. Non activated (spontaneous) adsorption: CO on Ni(111)

PROTEIN ADSORPTION ON POLYMER PARTICLES P

adsorption on polymer particles, because the exact mech-anism of protein adsorption has not yet been established. If the exact adsorption mechanism were known, then hy-drogen and ionic bonding (or even hydrophobic interac-tion) could be used for ligand coupling, which is expected to reduce dramatically the time and effort required for

EXPERIMENT 2 ADSORPTION OF LIQUIDS ONTO SOLID

des (ads = adsorption, des = desorption). When used in to describe the adsorption of solutes from solution, the Langmuir equation is as follows: c c n β α + = 1 (3) or c x m c α β α = + 1 / (4) where c is the concentration of the adsorbate in the solution, x is the weight of the adsorbate, m is the weight of the adsorbent (the resin), and

Effect of particle adsorption rates on the

The degree of shrinkage of particle stabilised bubbles of various sizes, in a polydisperse bubble dispersion, has been investigated in the light of the finite adsorption times for the particles and the disproportionation kinetics of the bubbles. For the case where the system contains an abundance of particles we find a threshold radius, above which bubbles are stabilised without any

Particle adsorption on surfaces with grafted

The adsorption of charged particles on surfaces with grafted polyelectrolites of opposite charge has been studied using a molecular theory. The structure of the adsorbed layer as a function of the total charge of the polymer, the bulk salt concentration and the polymer molecular weight will be presented. The possibility of multilayers adsorption will be discussed as well as the role of charge

(PDF) Modelling of adsorption processes ResearchGate

adsorption capacity of the adsorbent (mg/g); K d is the adsorption equilibrium constant (mg/l), which is the reciprocal of the const ant, b, in Langmuir isotherm .

Removal of two organophosphate pesticides by a bacterial

Sep 15, 2009 These particles of tezontle were sterilized 3 or 4 times in an autoclave at 121 °C for 20 min and then left to rest for 24 h. For the formation of biofilm on tezontle, the consortium was inoculated in flasks containing 50 mL of TS broth, the mixture of MP–TCF at final concentration of 25 mg/L and 30 particles of tezontle.

Degradation of the bendiocarb insecticide, using an

adsorption and bio-desorption system for the removal of pesticides. The MCBR operates with three airlift channels, and two channels packed with granular activated carbon (GAC) and fragments of volcanic stone (tezontle). The adsorption coefficient Qo of bendiocarb, contained in the commercial insecticide “Ficam W” was determined on GAC.

Preliminary study on the potential of arsenic removal by

Oct 01, 2012 Ground tezontle rock was used as the media in the SSFCWs after first being sieved through a 0.5-mm-opening sieve to remove finer particles which would typically clog subsurface-flow systems. The media sieve analysis resulted in a d 10 of 0.645 mm, d 60 of 2.3 mm and a uniformity coefficient (UC) of 3.6.

Water Special Issue : Recent Advances in Water

The optimal conditions (pH 8, 25 °C and 0.85–2.0 mm particle-size) were used to evaluate the adsorption capacity of tezontle with biofilm, which was promoted through tezontle exposition to wastewater in glass columns, for six months.

Water Free Full-Text The Effect of the Hydraulic

Removal of up to 37% was measured and is attributed, primarily, to adsorption on the biofilm formed on tezontle. The biofilm begins to form by a natural process on the tezontle surface. Then, the oldest layers are detached while a newer layer is formed, and finally the biofilm settles on the bottom of the UAF. This process is repeated constantly.

Synthesis and Properties of Carbonized Silicate Ceramics

tezontle, were investigated. As a plasticizer, water-containing wastes of active sludge were used (40 and 60 g). The content of clay was varied from 100 to 25 wt. %, the content of glass was varied from 60 to 25 wt. %, and the content of tezontle was varied from 50 up to 25 wt. %. The size of glass and tezontle particles was 60 µm ≤ d ≤

Biodegradation of high concentration phenol using

Sep 30, 2019 2.3. Abiotic phenol removal by SCB. Abiotic removal of phenol by SCB particles was assessed in batch experiments and in PBR. In the pretest attempts, the operational parameters (pH, phenol concentration, temperature, agitation and reaction time) for adsorption study were first optimized using the change-one-variable-per-time (COVT) method (Table S2; Supplementary material) (Razmi

Closed cycle of recycling of waste activated sludge

Jan 01, 2018 The recycling of waste activated sludge (WAS) formed in the process of biological purification of sewage is an urgent ecological problem. In the present work, two ways of recycling of WAS containing from 8 to 30% free water, namely, the synthesis of a carbon-containing component and synthesis of porous building ceramics (bricks) with the use of WAS and waste carbonizate, have been

Enhancing methyl parathion degradation by the

Jul 17, 2017 The degradation of the alkane was based on both adsorption and biodegradation by immobilized A. venetianus, where 93.3%, 77.7%, and 24.0% of tetradecane (400 mg/L) was removed by the immobilized cells, free cells, and bagasse after 36 hr incubation, respectively (Lin, Gan, Chen, & Naidu, 2015). One advantage of cell immobilization is that it

Pesticide Biodegradation: Mechanisms, Genetics and

Adsorption: 135.3, 102.8, 50.9 mg/g of Pb(II), Cu(II) y Zn(II) respectively. Pb II, Hg II and Cd II ions: Aspergillus terreus: Adsorption: 247.2, 37.7 y 23.8 mg/g for Pb II, Hg II y Cd II respectively : Black 5 (RB5) reactive: Funalia trogii: ND : Blue 172 reactive: Proteus vulgaris NCIM-2027

Biodegradation of Methyl Tertiary Butyl Ether (MTBE) by a

Dec 01, 2016 This study investigated the aerobic biodegradation of methyl tertiary-butyl ether (MTBE) by a microbial consortium in a continuous up-flow packed-bed biofilm reactor using tezontle stone particles as a supporting material for the biofilm. Although MTBE is toxic for microbial communities, the microbial consortium used here was able to resist MTBE loading rates up to 128.3 mg L-1 h-1, with

A Review on Internal Design Modifications in Activated

The COD removal rate of sessil® was further investigated with an increased OLR of 4-17 g COD/m 2 day and decreasing the HRT to 0.2-1.1 hours by Nacheva et al. [23], as seen in Fig. 2, and obtained the efficiency between 85% to 78%.The COD removal rate obtained was same up to 2 g COD /m 2 day organic loading after which the decrease in the performance for all the packing materials was

2014 Annual Meeting: Author Index J AIChE

226o Decreasing Polymer Flexibility Improves Wetting and Dispersion of Polymer Grafted Particles in a Chemically Identical 414v Comparative Preparation of ZIF-7 and ZIF-8 Membranes Supported on Tezontle and α- Alumina. 417s The Adsorption Characteristics of Hydrogen Chloride Gas Mixture on Zeolite 13X Pellet at High Pressure and

2014 Annual Meeting: Author Index F AIChE

550e Effects of Open Metal Site Availability on Adsorption Capacity and Olefin Interaction Strength, and System Size on the Phase Behavior of Small Clusters of Colloidal Particles. 717e Low-Dimensional Dynamic Models of 414v Comparative Preparation of ZIF-7 and ZIF-8 Membranes Supported on Tezontle and α- Alumina. Fraser, S. D. 641d

Design and Implement a System of Wastewater Treatment

Tezontle (first layer), sand (second layer), gravel (third filtration, as the adsorption is higher and the diameter of . ISSN: 1690-4524 SYSTEMICS, CYBERNETICS AND INFORMATICS VOLUME 10 NUMBER 2 YEAR 2012 7. forming a biofilm around the particles of the bed.

Water Special Issue : Recent Advances in Water

The optimal conditions (pH 8, 25 °C and 0.85–2.0 mm particle-size) were used to evaluate the adsorption capacity of tezontle with biofilm, which was promoted through tezontle exposition to wastewater in glass columns, for six months.

Water Free Full-Text The Effect of the Hydraulic

Removal of up to 37% was measured and is attributed, primarily, to adsorption on the biofilm formed on tezontle. The biofilm begins to form by a natural process on the tezontle surface. Then, the oldest layers are detached while a newer layer is formed, and finally the biofilm settles on the bottom of the UAF. This process is repeated constantly.

Natural carriers in bioremediation: A review

5.6. Tezontle. Tezontle is a volcanic rock tested recently as a carrier in bioremediation. This rock is commonly used in Mexico as a building material, and has a characteristic reddish colour (due to the presence of iron ions). The surface is highly porous and perforated, which provides a good place for biofilm formation by microorganisms.

Synthesis and Properties of Carbonized Silicate Ceramics

tezontle, were investigated. As a plasticizer, water-containing wastes of active sludge were used (40 and 60 g). The content of clay was varied from 100 to 25 wt. %, the content of glass was varied from 60 to 25 wt. %, and the content of tezontle was varied from 50 up to 25 wt. %. The size of glass and tezontle particles was 60 µm ≤ d ≤

Degradation of phenol at high concentrations using

Apr 01, 2019 Adsorption on the surface is the most common method in bioremediation, due to the simplicity of the procedure and its non-toxicity. In the present study, we have used sawdust and sodium-alginate beads for the immobilization of phenol degrading bacteria that have been isolated from contaminated zones.

Enhancing methyl parathion degradation by the

Jul 17, 2017 The degradation of the alkane was based on both adsorption and biodegradation by immobilized A. venetianus, where 93.3%, 77.7%, and 24.0% of tetradecane (400 mg/L) was removed by the immobilized cells, free cells, and bagasse after 36 hr incubation, respectively (Lin, Gan, Chen, & Naidu, 2015). One advantage of cell immobilization is that it

Pesticide Biodegradation: Mechanisms, Genetics and

Adsorption: 135.3, 102.8, 50.9 mg/g of Pb(II), Cu(II) y Zn(II) respectively. Pb II, Hg II and Cd II ions: Aspergillus terreus: Adsorption: 247.2, 37.7 y 23.8 mg/g for Pb II, Hg II y Cd II respectively : Black 5 (RB5) reactive: Funalia trogii: ND : Blue 172 reactive: Proteus vulgaris NCIM-2027

(PDF) Hydroponics A Standard Methodology for Plant

Hydroponics A Standard Methodology for Plant Biological Researches. 2012. Yuri Shavrukov

A Review on Internal Design Modifications in Activated

The COD removal rate of sessil® was further investigated with an increased OLR of 4-17 g COD/m 2 day and decreasing the HRT to 0.2-1.1 hours by Nacheva et al. [23], as seen in Fig. 2, and obtained the efficiency between 85% to 78%.The COD removal rate obtained was same up to 2 g COD /m 2 day organic loading after which the decrease in the performance for all the packing materials was

Techno Press

The adsorption of uranium U (VI) by Bacillus sp.UV32 from aqueous solution was examined as a function of metal ion concentration, cell concentration, adsorption time, pH, temperature, and the presence of some foreign ions. The adsorption process of U (VI) was found to follow the pseudo-second-order kinetic equation.

Arsenic(V) Removal in Wetland Filters Treating Drinking

In constructed wetlands, As usually adsorbs onto the surface of substrates, mineral particles, (oxy)(hydr)oxides and organic matter . Iron oxide tezontle has been found to remove As. The total As mass removal efficiency during the first three months was 57.7% in unplanted sub-surface-flow constructed wetlands packed with tezontle .

2014 Annual Meeting: Author Index J AIChE

226o Decreasing Polymer Flexibility Improves Wetting and Dispersion of Polymer Grafted Particles in a Chemically Identical 414v Comparative Preparation of ZIF-7 and ZIF-8 Membranes Supported on Tezontle and α- Alumina. 417s The Adsorption Characteristics of Hydrogen Chloride Gas Mixture on Zeolite 13X Pellet at High Pressure and

2014 Annual Meeting: Author Index F AIChE

550e Effects of Open Metal Site Availability on Adsorption Capacity and Olefin Interaction Strength, and System Size on the Phase Behavior of Small Clusters of Colloidal Particles. 717e Low-Dimensional Dynamic Models of 414v Comparative Preparation of ZIF-7 and ZIF-8 Membranes Supported on Tezontle and α- Alumina. Fraser, S. D. 641d