ion exchange and carbon adsorption

... concentration variables: 2 each for cation, anion, hydrogen, and hydroxide There are 6 connecting relations: 2 for ion exchange and 1 for neutralization equilibrium, and 2 ion-exchanger and 1 solu- tion ... Valenzuela and Myers, Adsorption Equilibrium Data Handbook, Prentice Hall, Englewood Cliffs, New Jersey, 1989. 32 Vermeulen, LeVan, Hiester, and Klein, “Adsorption and Ion Exchange” in Perry, R H and ... separation In addition to the normal sorptionoperations of adsorption and ion exchange, some other similar separa-tions are included Applications are discussed in this section in “Process Cycles.”

Ngày tải lên: 23/08/2017, 23:24

... concentration variables: 2 each for cation, anion, hydrogen, and hydroxide There are 6 connecting relations: 2 for ion exchange and 1 for neutralization equilibrium, and 2 ion-exchanger and 1 solu- tion ... Valenzuela and Myers, Adsorption Equilibrium Data Handbook, Prentice Hall, Englewood Cliffs, New Jersey, 1989. 32 Vermeulen, LeVan, Hiester, and Klein, “Adsorption and Ion Exchange” in Perry, R H and ... separation In addition to the normal sorptionoperations of adsorption and ion exchange, some other similar separa-tions are included Applications are discussed in this section in “Process Cycles.”

Ngày tải lên: 11/04/2023, 20:21

... aqueous solutions such as adsorption, precipitation and coagulation, ion exchange, fil-tration, membrane separation, chemical oxidation, sedimenta-tion, and reverse osmosis Adsorption process is commonly ... oxygen-containing func-tional groups can provide numerous adsorption sites and thus increase the adsorption capacity for phenol molecules and nickel ions[29] Effect of contact time and adsorption kinetics ... equation where Ciand Cfare the initial and final concentrations of phe-nol and nickel (mg/l) in the solution Adsorption capacity was calculated using equation where q is the adsorption capacity (mg

Ngày tải lên: 13/01/2020, 13:50

... concentration of solutions on ion exchange of Pb 2+ ions using ion exchange resin c 160 (weight of ion exchange resin 0.5 g; ionic strength 0.02 mol/l; pH 4.0±0.1; temperature (298±0.5) k; time of adsorption ... concentration of solutions on ion exchange of cd 2+ ions for ion exchange resin c 160 (weight of ion exchange resin 0.5 g; ionic strength of 0.02 mol/l; pH 4.0±0.1; temperature (298±0.5) k; time of adsorption ... concentrations of metal c o [mg/l] degree of purification [%] fig 3 influence of the initial concentration of solutions on ion exchange of cu 2+ ions for ion exchange resin c 160 (weight of ion exchange

Ngày tải lên: 04/12/2022, 16:15

... and Davidson, E A.: Microbiological basis of NO and N2O production and consumption in soil, edited by: An-dreae, M O and Shimel, D S., Exchange of trace gases between terrestrial ecosystems and ... gravimetrically and N concon-tents (NH+4 and NO−3), and N-mineralization and N-nitrification processes as the proce-dures described by Piccolo et al (1994) The main processes producing N2O are microbial and ... concen-trations and flux of soil gases during the sampling period nor was soil net N, net mineralization and net nitrification rates significantly correlated to soil gas emissions 3.2 Fine root and

Ngày tải lên: 04/12/2022, 16:39

... fullerene, carbon nanohorns, carbon nanocones, and carbon nano-onions Notably, SWNTs, MWNTs, graphene, and graphene oxide are carbon nanomaterials that exhibit exceptional physical, chemical, and mechanical ... surface area, and short diffusion length in the thickness direction.MoS2 exhibits abundant voids and defects that could enhance lithiation and de-lithiation; however, its practical application is hindered ... performance of lithium-ion batteries The conclusion discusses the research work summary, prospects and implications LITERATURE REVIEWStructure and properties of carbon nanotubes (CNTs)Carbon nanotubes

Ngày tải lên: 10/04/2023, 22:10

... critical foundation and initiates a new research direction in catalysis, energy storage, and conversion based on MoS2 nanostructured materials and carbon nanotubes in Vietnam in general, and VNU-HCM ... of one-dimensional and two-dimensional nanomaterials, and open up valuable alternative research methods in material technology materials for energy storage and conversion applications, such as ... 1T/2H-MoS2 and MoS2/CNTs nanocomposite, Taguchi experimental method for optimizing the synthesis conditions The physical and structural characterization methods, catalyst preparation and characterization

Ngày tải lên: 31/07/2024, 09:32

... thermal conductivity and stability of CNT/water nanofluids, including nanoparticle size and concentration, surfactant type and concentration, pH, temperature, power of ultrasonication and elapsed time ... and elapsed time after ultrasonication, and their interactions have been investigated experimentally The most suitable condition for production and application of CNT/water nanofluid has been ... small particle sizes and a narrow distri-bution The agglomerated CuO nanoparticles range 10RT air conditioner evaporator Shell and tube Condenser Expension valve Compressor injection port of nanofluid

Ngày tải lên: 21/06/2014, 04:20

... activated carbons In general, the heterogeneous and predominantly microporous activated carbon was produced Keywords: activated carbon, nitrogen, carbon dioxide, activation, impregnation, zinc ... The nitrogen adsorption-desorption isotherm at properties Determination of total surface area is commonly based on the theory of multilayer adsorption developed by Brunauer, Emmett and Teller with ... volume of activated carbon The morphology and composition of activated carbons were evaluated by SEM-EDX It was clearly seen that the activated carbons were full of cavities, and some of Zn metals

Ngày tải lên: 07/08/2014, 14:20

... branches and roots of the trees under study In addition, the amount and distribution of leaf area control radiation intercep-tion by tree crowns and determine carbon assimilaintercep-tion as the ... respiration of the woody tissues (stem and branches), and R r is the respiration of roots The following sign conventions are used: negative for assimilation and positive for respiration For the ... ecosystem and belowground respiration (Eqs (8) and (9)) to the tree level Carbon balance of trees (CB) was calculated from net assimilation (A N ) and from respiration estimates (R E and R sr)

Ngày tải lên: 08/08/2014, 01:22

... variation of the biomass (dry matter) distribution of trees at the outset, and the low statistical weight of the carbon content in the equation to calculate carbon biomass 4.4 Carbon biomass Carbon ... in each stand – Application of the models to the stand inventories to estimate sub-component or total dry matter and carbon biomass, for the above and underground tree components, by stand per ... Carbon biomass stored in the aerial and underground parts changed throughout Figure 1 Woody dry matter distribution (in t/haand %) in beech trees, for each stand The carbon biomass distribution

Ngày tải lên: 08/08/2014, 01:22

... affected by infec-tion Plants subjected to excision were less susceptible to infection by C parasitica or Phomopsis spp., with lower lesion extensions and canker growth (figures 1 and 2), probably ... in graphs and tables Main effects and interactions were tested against appropriate error terms, for perturbation (excised vs undisturbed), infection (inoculated vs control plants), and day of ... inoculation, (April 1997–January 1998), photosynthetic rates (A) and stomatal conductance (g) decreased due to infection both in undisturbed plants and plants subjected to excision (figures 3a,b and

Ngày tải lên: 08/08/2014, 14:21

... allo-cation) earlier Therefore, comparison of phytomass allo-cation requires the examination of stands of similar height and development [47] The relative contribution of needles and fine roots (and ... Biomass fractionation in plants: a reconsid-eration of definitions based on plant functions, in: Roy J., Garnier E (Eds.), A Whole Plant Perspective on Carbon-Nitrogen Interactions, SPB Academic, ... Agriculture classification) or a haplic podzol (Food and Agriculture Organisation classification) [3] A more detailed description of the topsoil profile with texture analysis and pH for all horizons

Ngày tải lên: 08/08/2014, 14:21

... conductance and photosynthe- sis, significantly decreases total carbon fix- ation. Water stress and carbon partitioning within the leaf Carbon partitioning to different chemical fractions ... adaptations involve control of stomatal conductance, leaf water potential, osmotic adjustment and photosynthetic carbon fixation. Carbon fixation can be divided into stomatal and ... Temporal and spatial variation in the water status of forest... given to the introduction and testing of these less conventional species or hybrids in both forestry and urban landscape

Ngày tải lên: 08/08/2014, 18:21

... (photochemical energy conver- sion and/or carbon metabolism), or only in- direct effects via stomatal closure and subsequent limitations of CO 2 diffusion to chloroplasts. Some ... petraea, and ≈ -4.0 MPa in Q pubescens and Q ilex. During drought, A and g decreased in parallel, which led to a linear relationship and was an indication of a ... replicates. Gas exchange measurements Whole leaf gas exchange was measured in an open system designed in the laboratory. Net CO 2 assimilation (A) and transpiration (E) rates

Ngày tải lên: 09/08/2014, 03:24

... (competition for water and nutrients, allelopathy) and above-ground (competition for light, modification of temperature, air humidity and windspeed) interactions (Gjerstad et al, 1984 ; Radosevich and ... d’utilisation de l’eau / masse foliaire spécifique INTRODUCTION which can be beneficial for the status and water-use The neighbourhood relationships between young trees and the surrounding vegetation ... vegetation without any below-ground relationship - on young Prunus avium trees Measurements of: 1) microclimatic parameters ; 2) growth ; 3) leaf gas exchange ; and 4) leaf carbon isotope composition...

Ngày tải lên: 08/08/2014, 23:22

... adsorbate in solution after adsorption is complete (mg/L); Q (mg/g) and b is the Langmuir adsorption constant related to the maximum adsorption capacity and the energy adsorption The Freundlich ... DP activated carbon (magnification 1000 x) Table presents the proximate and elemental analysis of precursor, char and DP activated carbon After undergoing carbonization and activation process, ... employed commercial activated carbon for COD adsorption such as [7] (Q = 37.88 mg/g), and [5],(Q = 4.16 mg/g) For the case of colour adsorption, it can be seen that adsorption of colour is well represented...

Ngày tải lên: 05/09/2013, 16:10

... intervention (Articles 55, 59 to 63); 308 Copies (Articles 67 and 68); 309 Alterations (Article 69); 310 Limitation of actions (Articles 70 and 71); 311 Holidays, computation of limits of time and ... Exchange and Promissory Notes (Geneva, 1930) The League of Nations Articles I - XI [Omitted] TITLE I - Bills of Exchange CHAPTER I - Issue and Form of a Bill of Exchange Article A bill of exchange ... of the parties liable to him and payable at the domicile of that party The redraft includes, in addition to the sums mentioned 201 in Articles 48 and 49, brokerage and the cost of stamping the...

Ngày tải lên: 22/10/2013, 10:15

... gardening and became Australia’s vegetable and fruit specialists.24 Next, steamships, railroads, and refrigeration expanded the initial stock of American, European, and local foods while urbanization ... They added pigs, dogs, and chickens to a region short on edible land animals, along with plant foods like taro and yams, and food producing techniques like sago palm cultivation (starch is extracted ... giant marsupials and flightless birds on hand for the taking.9 Because Australia and New Zealand had been cut off from the rest of the world for close to 100 million years, the evolutionary process...

Ngày tải lên: 01/11/2013, 11:20

... meat and dairy products delivered maize to humans second-hand But in some areas of cultivation – in northern Spain and Italy, The Columbian Exchange and the Old Worlds 137 southern France, and ... snowballed into a population explosion as the number of Europeans swelled in the eighteenth century; England’s population doubled between 1731 and 1816, and the French had some million more mouths to ... centuries-long cycle of famine and disease snuffing out population gains, whereby improved nutrition cut sharply into infant and child mortality and strengthened the immune system of young and old alike to...

Ngày tải lên: 01/11/2013, 11:20