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investigation on modified humic substances

2020-08-11T02:08:01+00:00
  • Investigation on Modified Humic Substances Based Binders ...

    Investigation on Modified Humic Substances Based Binders for Iron Ore Agglomeration Article in Journal of Engineering Materials and Technology 134(1):010901 January 2012 with 23 Reads

  • Investigation on Modified Humic Substances Based Binders ...

    2011-12-12  Characterization of modified humic substances based binders for iron ore agglomeration was examined by chemical analysis, optical density, Fourier transform infrared spectrum (FTIR), and thermogravimetry and differential scanning calorimetry (TG–DSC).

  • Cited by: 11
  • Mechanistic investigation of humic substances assisted ...

    22 hours ago  Here, we investigated the photodegradation of IMI under simulated sunlight in the presence of humic substances (HS), typically including humic acid (HA) and fulvic acid (FA). The direct and indirect IMI photodegradation was found to increase both with increasing pH and with deoxygenation of the reaction solutions.

  • Author: Ivan P. Pozdnyakov, Yuliya E. Tyutereva, Marina V. Parkhats, Vyacheslav P. Grivin, Yuan Fang, Lu Liu...
  • Investigation of Adsorption of Lead(II) onto a ...

    Investigation of Adsorption of Lead(II) onto a Montmorillonite Clay modified by Humic Acid 1Iffat Aziz, 2Muhammad Sirajuddin*, 3Muhammad Haleem Khan, 1Shafqat Nadeem, 1Syed Ahmad Tirmizi**, 4Rafaqat Ali Khanb 1Department of Chemistry, Quaid-i-Azam University 45320, Islamabad, Pakistan. 2Department of Chemistry, University of Science and Technology, Bannu, Pakistan. 3Department of

  • Investigation of soil humic substances from different ...

    2000-10-03  2.2. Preparation of humic substances. The humic substances were extracted from air-dried soils using the grain size fraction smaller than two millimetres with 0.1 M NaOH, and separated into fulvic FA and humic acids (HA) according to the recommendations of the IHSS (International Humic Substances Society), modified by Kuwatsuka et al. . 2.3. TG ...

  • Investigation of humic acid complexation behavior with ...

    2000-09-01  FTIR spectra of the original humic acid type M1 (M1), the permethylated humic acid type M1 (M1-B) and the modified humic acid type M1 with blocked phenolic OH groups (M1-PB). The spectra were shifted along the y-axis for clarity. stretch (2929 and 2857 cm-1 ) and C-H deformation vibrations (1452 cm-1 ) of CH3 groups. This intensity increase is due to the introduction of CH3 groups into the

  • Multi-spectroscopic investigation on the spatial ...

    The content of humic-like substances showed a decreasing trend from the north to south in Nansi Lake. On this basis, samples from north and south ends of Nansi Lake were selected for fluorescence titration. All components were quenched with the increasing of Cu 2+ addition.

  • Author: Haoyu Ren, Feiyang Ma, Xin Yao, Xin Yao, Keqiang Shao, Liwei Yang
  • Investigation of adsorbed humic substances using atomic ...

    2004-11-09  Abstract Atomic force microscopy (AFM) was used to study the effect of adsorption of humic substances onto a goethite-coated mica surface, on the forces between the goethite surface and a silica colloidal probe. The positively charged goethite surface (at

  • Investigation of humic acid complexation behavior with ...

    2000-09-01  Investigation of humic acid complexation behavior with uranyl ions using modified synthetic and natural humic acids; Solution coordination chemistry of uranium in the binary UO-SO and the ternary UO-SO-OH system ; The speciation of Tc(IV) in chloride solutions; The hydrolysis of uranium(VI) in sulfate media; Complex formation of Eu(III) with polyacrylic acid; Determination of

  • Cited by: 90
  • Nitrogen-15 and carbon-13 NMR investigation of ...

    Influence of Pb(II) on the Radical Properties of Humic Substances and Model Compounds. The Journal of Physical Chemistry A 2005 , 109 (10) , 2223-2232. DOI: 10.1021/jp045121q.

  • Cited by: 93
  • Humic substances interfere with phosphate removal by ...

    2014-05-01  Hence, the potential effect of humic substances on the efficacy of La modified clay for eutrophication control should be taken into consideration. To our knowledge no controlled experiments testing the effect of humic substances on the FRP removal by the LMB have been reported in the scientific literature.

  • Nitrogen-15 and carbon-13 NMR investigation of ...

    Influence of Pb(II) on the Radical Properties of Humic Substances and Model Compounds. The Journal of Physical Chemistry A 2005 , 109 (10) , 2223-2232. DOI: 10.1021/jp045121q.

  • Investigation of humic acid complexation behavior with ...

    2000-09-01  FTIR spectra of the original humic acid type M1 (M1), the permethylated humic acid type M1 (M1-B) and the modified humic acid type M1 with blocked phenolic OH groups (M1-PB). The spectra were shifted along the y-axis for clarity. stretch (2929 and 2857 cm-1 ) and C-H deformation vibrations (1452 cm-1 ) of CH3 groups. This intensity increase is due to the

  • INVESTIGATION OF THE ADSORPTION BEHAVIOR OF CESIUM,

    INVESTIGATION OF THE ADSORPTION BEHAVIOR OF CESIUM, BARIUM AND PHENOL ONTO MODIFIED HUMIC ACID AND IRON NANOPARTICLES A THESIS SUBMITTED TO THE DEPARTMENT OF CHEMISTRY AND THE INSTITUTE OF ENGINEERING AND SCIENCES OF BILKENT UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE

  • NMR Investigation of Enzymatic Coupling of Sulfonamide ...

    Here, we investigate fungal peroxidase-mediated covalent coupling of 13 C-sulfamethazine and 15 N-sulfapyridine to humic substances. 1 H– 13 C heteronuclear single quantum correlation (HSQC) nuclear magnetic resonance spectroscopy provided an initial indication of peroxidase-mediated covalent binding of 13 C-sulfamethazine to humic acid.

  • Investigations on humic acid removal from water using ...

    2016-12-26  The major components of NOM are humic substances (HS) which are typically naturally occurring compounds that account for 30–80% of the dissolved organic matters in natural water (Yang et al. 2004). HS mainly consist of humic acid (HA), fulvic acid (FA), and humin (Matilainen et al. 2011). Since the early 1970s, water quality and treatment ...

  • Modified Sample Preparation Approach for the Determination ...

    2017-12-06  Modified Sample Preparation Approach for the Determination of the Phenolic and Humic-Like Substances in Natural Organic Materials By the Folin Ciocalteu Method. Pontoni L(1), Panico A(2), Matanò A(1), van Hullebusch ED(3), Fabbricino M(1), Esposito G(4), Pirozzi F(1).

  • Investigation of adsorbed humic substances using atomic ...

    2004-11-09  Abstract Atomic force microscopy (AFM) was used to study the effect of adsorption of humic substances onto a goethite-coated mica surface, on the forces between the goethite surface and a silica colloidal probe. The positively charged goethite surface (at pH < 7) resulted in strong adsorption of humic substances.

  • An investigation of the effects of fulvic and humic acids ...

    An investigation of the effects of fulvic and humic acids on the absorption of selected drugs, vitamins and minerals using the everted mouse gut model. by . Kirsten Willis . Submitted in fulfilment of the requirements for the degree . Magister Scientiae in Pharmacology . in the . Department of Pharmacology . Faculty of Health Sciences . University of Pretoria . Supervisor:

  • Preparation and investigation of fulvic acid and its metal ...

    Preparation and investigation of fulvic acid and its metal derivative complexes with application Abdou. S. EL-Table* ... task of humic substances in environmental chemistry is to remove toxic metals, anthropogenic organic chemicals and other pollutants from water. Ion-exchange materials based on calcium humate were found suitable for the removal of such heavy metals as iron,

  • Modified Sample Preparation Approach for the Determination ...

    2017-12-06  Modified Sample Preparation Approach for the Determination of the Phenolic and Humic-Like Substances in Natural Organic Materials By the Folin Ciocalteu Method. Pontoni L(1), Panico A(2), Matanò A(1), van Hullebusch ED(3), Fabbricino M(1), Esposito G(4), Pirozzi F(1).

  • Investigation of adsorbed humic substances using atomic ...

    2004-11-09  Abstract Atomic force microscopy (AFM) was used to study the effect of adsorption of humic substances onto a goethite-coated mica surface, on the forces between the goethite surface and a silica colloidal probe. The positively charged goethite surface (at

  • Investigations on humic acid removal from water using ...

    2016-12-26  The surfactant modified zeolites (SMZ) were prepared by mixing 10 g of NZ with varying amounts of HDTMA aqueous solutions in 200 mL distilled water placed in a 400 mL flask. The mixture was then shaken at 150 rpm for 8 h. HDTMA loading levels ranged from 0 to 200% ECEC of zeolite (SMZ-0% to SMZ-200%).

  • Investigation of humic acids concentration in different ...

    Humic substances, including humic and fulvic acids, are a hydrophobic fraction of DOM that were reported as important DBP precursors (Leenheer Croué 2003; Krasner et al. 2009). Humic acids may not react directly with chlorine in forming THMs, but their degradation products do. A basic DOM measurement method, e.g. dissolved organic carbon (DOC), is a gross measurement that cannot

  • NMR Investigation of Enzymatic Coupling of Sulfonamide ...

    Here, we investigate fungal peroxidase-mediated covalent coupling of 13 C-sulfamethazine and 15 N-sulfapyridine to humic substances. 1 H– 13 C heteronuclear single quantum correlation (HSQC) nuclear magnetic resonance spectroscopy provided an initial indication of peroxidase-mediated covalent binding of 13 C-sulfamethazine to humic acid.

  • Investigation of the Complexation and the Migration of ...

    Investigation of the Complexation and the Migration of Actinides and Non-radioactive Substances with Humic Acids under Qeogenic Conditions DE04F7305 Wissenschaftlich-Technische Berichte FZR- 399 März 2004 ISSN 1437-322X Susanne Sachs, Katja Schmeide, Vinzenz Brendler, Adela Kfepelovä, Jens Mibus, Gerhard Geipel, Karl-Heinz Heise, Gert Bernhard

  • The molecular properties of humic substances isolated from ...

    The molecular properties of humic substances isolated from a UK upland peat system: a temporal investigation. Scott MJ(1), Jones MN, Woof C, Simon B, Tipping E. Author information: (1)School of Biological Sciences, University of Manchester, UK. The study concerns the possible changes in the molecular characteristics of humic materials isolated from the same source as a function of time. A ...

  • Colloidal diatomite, radionickel, and humic substance ...

    This work determined the influence of humic acid (HA) and fulvic acid (FA) on the interaction mechanism and microstructure of Ni(II) onto diatomite by using batch experiments, X-ray photoelectron spectroscopy (XPS), and extended X-ray absorption fine structure (EXAFS) methods. Macroscopic and spectroscopic

  • A preliminary investigation on the photocatalytic ...

    A rough estimation of the destruction rate can be made through the assumption that the decomposition rate of humic substances is proportional to the reactive TOC concentration. Effect of bumic acid concentration The effect of initial substrate concentration on the photocatalytic degradation rate was investigated. The UV• VIS absorption values at 400, 280 and 254 nm were evaluated for humic ...

  • Preparation and investigation of fulvic acid and its metal ...

    Preparation and investigation of fulvic acid and its metal derivative complexes with application Abdou. S. EL-Table* ... task of humic substances in environmental chemistry is to remove toxic metals, anthropogenic organic chemicals and other pollutants from water. Ion-exchange materials based on calcium humate were found suitable for the removal of such heavy metals as iron, nickel, mercury ...

  • Investigations on humic acid removal from water using ...

    2016-12-26  The surfactant modified zeolites (SMZ) were prepared by mixing 10 g of NZ with varying amounts of HDTMA aqueous solutions in 200 mL distilled water placed in a 400 mL flask. The mixture was then shaken at 150 rpm for 8 h. HDTMA loading levels ranged from 0 to 200% ECEC of zeolite (SMZ-0% to SMZ-200%).

  • Structural investigation of coal humic substances by ...

    Here, we report the application of a selective liquid-phase hydrogen/deuterium exchange (HDX) coupled to ultra-high resolution FTICR MS for structural investigations of individual constituents of humic substances (HS) isolated from three coal samples of different geographical origin. Selectivity was achieved by conducting reactions in DCl or NaOD solutions for catalyzing HDX in aromatic ring ...

  • Humic acid modified Fenton reagent for enhancement of the ...

    2007-03-08  In this study the application of humic acid in a modified Fenton system is examined. Humic substances are ubiquitous natural macromolecules resulting from microbial and chemical transformations of organic debris. Humic substances are classified into humic and fulvic acid (HA and FA) as well as humin according to their solubility characteristics.

  • Preparation and investigation of fulvic acid and its metal ...

    Currently, humic materials are used as additivesin fertilizers. Different salts of humic substances, such as calcium humate, were used to increase soil fertility. The fertilizing effect of sodium humate on plant leaves has been described. Ammonium humate was also found to have a significant growth-stimulating effect.

  • Humic Substances in Environmental Remediation The ...

    Hence humic substances hold great promise functioning as amendments to mitigate the adverse impacts of ecotoxicants and as active agents in remediation. It has been found that humic substances can enhance biotic and abiotic degradation of phenols, polyaromatic hydrocarbons (PAH) and pesticides in the aquatic environment.

  • An Investigation of Actinide Interactions With Humic ...

    Abstract. Saltmarsh and intertidal areas in SW Scotland and NW England receive inputs of natural and anthropogenic radionuclides from a number of sources. Discharges of low level

  • Remediation of Hydrocarbon‐Contaminated Soil by Washing ...

    Modified humic substances can be used for the remediation of hydrocarbon‐contaminated soils. Microwaves can accelerate the chemical transformation of humic substances. Esterified humic substances are very efficient to wash contaminated soils.

  • Humic Substances Taylor Francis Group

    2003-11-28  Humic substances are ubiquitous in the environment. These remarkable brown biomaterials are found in animals, plants, coals, sediments, soils and water. They are crucial components of the carbon cycle and other life processes. Humic Substances: Nature's Most Versatile Materials contains a compilation of papers presented at the 2002 Humic Substances Seminar and will keep humic substances ...

  • Effect of modified humic acid binder on pelletisation of ...

    2015-04-12  A modified humic acid (MHA) binder was tested as a substitute for bentonite to prepare qualified specularite pellets. The results show that there is stronger chemisorption between organic functional groups in MHA binder molecular and specularite particles, improving the green pellet strength.

  • Enzymatic Transformation and Bonding of Sulfonamide ...

    To further elucidate conditions, strength, and mechanisms of the fixation to soil humic substances, three selected sulfonamides were investigated using the biochemical oligomerization of substituted phenols as a model for the humification process. Catechol, guaiacol, and vanillin were enzymatically reacted using laccase from Trametes versicolor.

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