particle sizing Articles

  • Particle Size Reduction Strategies

    Grinding strategies are driven by business priorities, feedstock types and quantities, compost mix ratios, product markets, sales seasonality and the weather. Particle size reduction is an important organic materials handling step that enhances the biological or chemical process by optimizing the particle surface area-to-volume ratio. Grinders, shredders and chippers are used for size ...


    By BioCycle Magazine

  • The Language of Particle Size

    Most practitioners in the pharmaceutical, mining, environmental, paints and coatings, and other fields have reason to know the sizes of particles in a given powder or slurry sample. While many technologies exist to describe that collection of sizes, the reports delivered by those technologies are written in their own vocabulary. This particle size lexicon can convey a tremendous amount of ...


    By Particle Technology Labs

  • Particle Dispersion for Size Analysis

    Panicle size analysis is a vital analytical tool in the pharmaceutical industry. The results can be used to meet safety and quality specifications and provide information for product development and manufacturing. Modern techniques have made determining the particle size of a material quick and convenient, but many factors can influence the quality of data obtained. While particle size analysis ...


    By Particle Technology Labs

  • A Comparison of Methods to Determine the Particle Size

    There currently exist a multitude of techniques to determine particle size distributions. However, in assessing the particle size distribution (PSD) of solids in a stormwater sample, the number of suitable techniques is considerably reduced due to the limited quantity of solids in a typical stormwater sample. The electrical sensing zone method (ESZ), which utilizes the Coulter Principle, and ...


  • An overview of micron-ranged particle sizing techniques

    Given the wide range of particle sizing technologies and instrumentation on the market, the choice of measurement technique can be daunting, especially if one is unfamiliar with the options available. Once introduced and familiar with an individual technique, it can be easy to continue to choose it by default. While this is certainly understandable, it may prove a disservice when the technique is ...


    By Particle Technology Labs

  • What is the size distribution and sources of particles in ambient air?

    The particle sizes in the ambient air are ranged from 1 nanometer to slightly more than 10 micrometers. There are three modes: coarse, fine and nano. The course mode particles are road dusts, spores and pollens. The minimum sizes of these particles are 1 to 3 micrometers. The fine mode particles are generally secondary particles formed from reactions such as smoke, sulfates, nitrates, ammonium ...

  • Sizes of particles formed during municipal wastewater treatment

    Volumetric diameters Dv and specific surface area SpS of sludge particles formed during chemical coagulation and electrocoagulation of sewage were determined. The obtained aggregate-flocs differed substantially in both Dv and SpS values. The differences in Dv and SpS values of the analyzed particles were ...


    By IWA Publishing

  • Problems in Particle Size: Laser Diffraction Observations

    The results obtained by a particle size analysis can easily be taken for granted. If the particle size distribution of a material must be quantified and reported, it is important that the full implications of the analytical technique and generated data are investigated and understood. While complying with designated testing methods and procedures is of great importance in a quality assurance ...


    By Particle Technology Labs

  • Focus on Microfiltration Part 3: Extending Service Life Using Prefiltration

    Last month we examined filter selection strategies for maximizing service life in continuous use applications.  In this 3rd installment, we will examine the use of prefilters to extend service life. Clarifying liquids with high levels of suspended solids is challenging, especially for applications requiring submicron filtration.  In these applications, filter users who experience ...


    By Sterlitech Corporation

  • Shredding Puzzle in the Process of Waste Material Recycling

    There are two main types of waste fabric waste: (1) the factory in the leather fabric processing and production of leather fabric can not be 100% of the use, so in the production of some by-products or waste, such as tailoring and sewing clothes when the extra cloth, cloth and other waste , As well as in the synthesis of chemical fiber in the process of excess waste and so ...


    By Harden Industries Ltd.

  • On PM 2.5 Filters, Let’s just clear the air between us; ok?

    In the area of a former military building complex in the Chaoyang District of Beijing is a unique and thriving artistic community.  In the middle of this art district, is a strange 7-meter tall tower shaped like an avant-garde metallic pineapple.  Designed by Dutch artist Daan Roosegaarde, it is both an artistic creation and a functional tool meant to test a possible solution for ...


    By Sterlitech Corporation

  • Focus on Microfiltration Part 2: Filter Longevity and Filter Selection

    Last month, we described the considerations associated with predicting filter service life and how total throughput can be estimated through experimentation.  In this second installment, we will examine four filter selection strategies for maximizing service life in continuous-use applications. These aspects consider chemical compatibility, temperature, binding characteristics, and pore ...


    By Sterlitech Corporation

  • Granulometric Evaluation of Particle Size Using Suspension Pressure During Sedimentation

    A new method, computerized granulometric analysis in suspension (C-GRAINS), is suggested for the sedimentation analysis of soil particles based on the relation between the specific weight and liquid pressure of a soil suspension. Theoretical aspects concerning this new testing method are discussed, and a prototype C-GRAINS system is fabricated accordingly. The general behavior of the new system ...


    By ASTM International

  • Influence of particle size and operating parameters on virus ultrafiltration efficiency

    In water treatment, virus removal using ultrafiltration is a major step towards better water quality. In this paper, we study virus filtration efficiency using surrogate virus particles and via statistical surface-response approach. We focus on the effect of particle size (20–100 nm range) as a key factor along with the effects of transmembrane pressure (20–60 kPa range) and feed flowrate ...


    By IWA Publishing

  • Impact of kaolinite clay particles on the filtration of Cryptosporidium-sized microspheres

    Granular filtration remains a key barrier for Cryptosporidium removal in water treatment plants without UV irradiation. To assess the impact of clay particles in source water on Cryptosporidium removal efficiency by granular filtration, this study investigated the co-transport of Cryptosporidium-sized microspheres and kaolinite particles in sand columns. To ...


    By IWA Publishing

  • Impact of controlled particle size nanofillers on the mechanical properties of segmented polyurethane nanocomposites

    The impact of average layered silicate particle size on the mechanical properties of thermoplastic polyurethane (TPU) nanocomposites has been investigated. At fixed addition levels (3 wt% organosilicate), an increase in average particle size resulted in an increase in stiffness. Negligible stiffening was observed for the smallest particles (30 nm) due to reduced long-range intercalation and ...


    By Inderscience Publishers

  • Hierarchy of sizes and sorption selectivity of ultrafine particles of hydrated titania

    It is shown that precipitation of hydrated titania from sulphuric acid and hydrochloric acid solutions in the presence of graphite soot gives rise to titania composite material with surface-deposited hydrated TiO2 particles. Three levels of hydrated TiO2 particles size distributions have been detected as a result of SEM and STM analysis of the composites. Quantum-chemical simulation of titanium ...


    By Inderscience Publishers

  • Comparison of digital and manual methods of snow particle size estimation

    Maintaining long time series of observations of the Cryosphere is a key issue in climate research. Long observational time series involve problems due to change in methodology or observers. In order to extend time series and introduce new methods, careful comparisons must be made to ensure homogeneity in the observational data. We have compared an established method for snow grain-size ...


    By IWA Publishing

  • Impact of particle size and light exposure on the effects of TiO2 nanoparticles on Caenorhabditis elegans

    The increasing use of engineered nanoparticles in industrial and consumer products leads to a release of the anthropogenic contaminants to the aquatic environment. To obtain a better understanding of the environmental effects of these particles, the nematode Caenorhabditis elegans was used to investigate the organism‐level effects and in vivo molecular responses. Toxicity of bulk‐scale (~160 ...


    By John Wiley & Sons, Ltd.

  • Size distribution of the secondary organic aerosol particles from the photooxidation of toluene

    In a smog chamber, the photooxidation of toluene was initiated by hydroxyl radical (OH·) under different experimental conditions. The size distribution of secondary organic aerosol (SOA) particles from the above reaction was measured using aerodynamic particle sizer spectrometer. It was found from our experimental results that the number of SOA particles increased with increasing the ...


    By IOS Press

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