نتایج جستجو برای: humic substance

تعداد نتایج: 211688  

2015
Vaclav Vetvicka Jose Maria Garcia-Mina Jean-Claude Yvin

AIM Despite intensive research, liver diseases represent a significant health problem and current medicine does not offer a substance able to significantly inhibit the hepatotoxicity leading to various stages of liver disease. Based on our previously published studies showing the protective effects of a glucan-humic acid (HA) combination, we focused on the hypothesis that the combination of the...

Journal: : 2021

As a result of studies it was found that the peloids deposit Tuzkol Lake (Republic Kazakhstan) are high quality medium-sulfide, weakly alkaline sludge muds. It peloid-derived humic acid contains 49.63 % oxygen, 22.37% carbon, 9.65 silicon and 6.26% calcium; also Na, Mg, Al, Fe an insignificant amount S, Cl, K, F. Electron microscopy IR spectroscopy analysis molecular structure substances indica...

Journal: :Journal of hazardous materials 2007
J Q Jiang

The aim of this paper is to review the research progress of using ferrate(VI) in following fields of environmental remediation: (1) water disinfection; (2) degradation of synthetic organic pollutants; (3) treatment of emerging organic pollutants; (4) oxidation of inorganic pollutants; (5) removing humic substance; (6) wastewater treatment and disinfection; and (7) sewage sludge treatment. Whils...

2010
P L Ascough

Charcoal is the result of natural and anthropogenic burning events, when biomass is exposed to elevated temperatures under conditions of restricted oxygen. This process produces a range of materials, collectively known as pyrogenic carbon, the most inert fraction of which is known as black carbon (BC). BC degrades extremely slowly and is resistant to diagenetic alteration involving the addition...

Journal: :Applied and environmental microbiology 2000
C A Francis A Y Obraztsova B M Tebo

Anaerobic enrichments with acetate as the electron donor and Fe(III) as the terminal electron acceptor were obtained from sediments of Salt Pond, a coastal marine basin near Woods Hole, Mass. A pure culture of a facultatively anaerobic Fe(III) reducer was isolated, and 16S rRNA analysis demonstrated that this organism was most closely related to Pantoea (formerly Enterobacter) agglomerans, a me...

خالقی, علیرضا, دالوند, مریم, سلگی, موسی,

Plants are faced with various environmental stresses during their growing period. Each of these stresses have different effects on growth, metabolism and yield according to the sensitivity level and stage of the plant growth. One way of reducing the negative effects of the stresses is to use humic substances. The present study was carried out to evaluate the effects of humic acid and drought st...

Journal: :Water research 2013
Ming Xie Long D Nghiem William E Price Menachem Elimelech

The impact of humic acid fouling on the membrane transport of two pharmaceutically active compounds (PhACs) - namely carbamazepine and sulfamethoxazole - in forward osmosis (FO) was investigated. Deposition of humic acid onto the membrane surface was promoted by the complexation with calcium ions in the feed solution and the increase in ionic strength at the membrane surface due to the reverse ...

2000
R. Bian K. Yamamoto Y. Watanabe

This paper deals with the results from experiments concerning the effects of an increasing shear rate at the edge of the membrane on reducing concentration polarization and on controlling membrane fouling during filtration of river water. Concentration polarization of humic substances in NF and MF membranes can be reduced by increasing the shear rate. The concentration polarization model can pr...

Fatemeh Sahlabadi, Mohammad Hassan Ehrampoush, Mohammad Taghi Ghaneian, Monireh Kheirkha, Reza Amraei, Tahereh Jasemizad,

Introduction: Humic acids have adverse effects on the water quality, then should be removed from water resources. The aim of this study was to evaluate the effect of nitrate as a radical scavenger for removal of humic acid from aqueous solutions by electron beam irradiation. Materials and Methods: In this study, after preparation of stock humic acid solution in alkaline condition, different con...

Journal: :Environmental science & technology 2014
Natalia S Shcherbina Stepan S Kalmykov Leonid A Karpiouk Sergey A Ponomarenko Kirk Hatfield Richard Haire Irina V Perminova

The objective was to study plutonium partitioning between immobile and mobile humic materials at the water-solid interfaces. Immobilization of the humic materials on solid supports was performed in situ using self-adhesive silanized humic derivatives. The presence of the humic adlayers on solid supports was shown to significantly enhance Pu sorption and its retention under both steady state and...

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