Humasorb-Cs™: A Humic Acid-Based Adsorbent to Remove Organic and Inorganic Contaminants

Sanjay, H.G.; Fataftah, Amjad; Walia, D.S.; Srivastava, K. C.

doi:10.1016/b978-1-85573-815-7.50026-x

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…It is becoming clearer, that the presence of humics in soil is necessary for sustainable agriculture, due to their ability to condition the soil, enhance its stability and increase its resistance to erosion (Laker et al 1993 ; Spaccini et al 2002 ), ensure enhanced biological activity (Canellas et al 2002 ; Canellas et al 2008 ; Nardi et al 2000a , b ; Zandonadi et al 2007 ) and obtain higher crop yields (Antošová et al 2008 ; Brownell et al 1987 ; Eyheraguibel et al 2008 ). In addition, humics have the ability to sequestrate soil pollutants (Evdokimov and von Wandruszka 1998 ; Sanjay et al 1999 ; Senesi and Loffredo 2001 ; von Wandruszka 2000 ), and may be used in soil remediation (Fava et al 2004 ; Stehlíčková et al 2009 ; von Wandruszka 2000 ).…”

Section: Introductionmentioning

confidence: 99%

The physico-chemical properties and biostimulative activities of humic substances regenerated from lignite

et al. 2014

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The positive effect of humic acids on the growth of plant roots is well known, however, the mechanisms and role of their physical structure in these processes have not been fully explained yet. In this work, South-Moravian lignite was oxidized by means of nitric acid and hydrogen peroxide to produce a set of regenerated humic acids. The elemental composition, solid state stability and solution characteristics were determined and correlated in vitro with their biological activity. A modified hydroponic method was applied to determine the effects of their potassium salts on Zea mays seedlings roots with respect to the plant weight, root length, root division, and starch and protein content. The relations between the determined parameters were evaluated through Principal Component Analysis and Pearson’s correlation coefficients. The results indicated that the most important factor determining the biological activity of South-Moravian lignite potassium humates is related to the nature of self-assemblies, while the chemical composition had no direct connection with the root growth of Zea mays seedlings. It was demonstrated a controlled processing that provided humic substances with different chemical and physicochemical properties and variable biological activity.

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Section: Introductionmentioning

confidence: 99%

The physico-chemical properties and biostimulative activities of humic substances regenerated from lignite

et al. 2014

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“…To the best of our knowledge, previous investigations involving HS modifications focused on understanding the structure of humics (15) or their bioavailability (16), and not on enhancing or altering their reactive properties for the purpose of augmenting their utility for environmental remediation. The commercial production of modified HS is limited to HUMASORB, a multipurpose contaminant adsorbent obtained by the cross-linking of HS that reduces their solubility (17), but does not enhance their redox activity. It may be the case, however, that cross-linking quinonoidenriched humic materials will yield redox-active humic adsorbents suitable for a use in redox reactive barriers.…”

Section: Introductionmentioning

confidence: 99%

Design of Quinonoid-Enriched Humic Materials with Enhanced Redox Properties

Perminova

Kovalenko

Schmitt‐Kopplin

et al. 2005

Environ. Sci. Technol.

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The primary goal of this work was to develop quinonoid-enriched humic materials with enhanced redox properties that could be used as potentially effective redox mediators and reducing agents for in situ remediation of soil and aquatic environments. Two different strategies were formulated and tested to derive these materials. The first strategy called for the oxidation of phenolic fragments associated with the humic aromatic core. In a second strategy, polycondensation of these phenolic fragments was carried out with hydroquinone and catechol. The oxidized derivatives and copolymers obtained were characterized using elemental and functional group analyses, and capillary zone electrophoresis. The redox properties were evaluated using ESR spectrometry and reducing capacity determinations. The reducing capacities of copolymers ranged between 1 and 4 mmol/g, which were much higher than the parent material and the oxidized derivatives. Hence, preference should be given to the copolycondensation approach. The quinonoid-enriched humics are nontoxic, water soluble, and resistant to biodegradation; thus, they could be applied as soil amendments to reduce highly mobile oxoanions of heavy metals and radionuclides, or as redox mediators to enhance in situ bioremediation. Otherwise, cross-linked copolymers could be created to serve as inexpensive reductants in permeable reactive barriers designed to remove highly oxidized contaminants from polluted groundwaters.

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Remediation Chemistry of Humic Substances: Theory and Implications for Technology

Perminova

Hatfield

NATO Science Series

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Humasorb-Cs™: A Humic Acid-Based Adsorbent to Remove Organic and Inorganic Contaminants

Cited by 4 publications

References 4 publications

The physico-chemical properties and biostimulative activities of humic substances regenerated from lignite

The physico-chemical properties and biostimulative activities of humic substances regenerated from lignite

Design of Quinonoid-Enriched Humic Materials with Enhanced Redox Properties

Remediation Chemistry of Humic Substances: Theory and Implications for Technology

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