Remediation Chemistry of Humic Substances: Theory and Implications for Technology

Perminova, Irina V.; Hatfield, Kirk

doi:10.1007/1-4020-3252-8_1

Cited by 48 publications

(29 citation statements)

References 132 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Both hydrophilic and hydrophobic fragments can be found in HSs, rendering them surface-active [ 47 ]. The heterogeneity of functional groups results in the high reactivity of HSs towards organic and inorganic pollutants [ 48 , 49 , 50 ]. Surface activity determines solubilization phenomena in the presence of HSs with regard to poorly soluble hydrophobic organic compounds [ 19 , 21 , 51 ].…”

Section: Humic Substances As a Complex Molecular Systemmentioning

confidence: 99%

Interactions between Humic Substances and Microorganisms and Their Implications for Nature-like Bioremediation Technologies

Куликова

Perminova

2021

Molecules

View full text Add to dashboard Cite

The state of the art of the reported data on interactions between microorganisms and HSs is presented herein. The properties of HSs are discussed in terms of microbial utilization, degradation, and transformation. The data on biologically active individual compounds found in HSs are summarized. Bacteria of the phylum Proteobacteria and fungi of the phyla Basidiomycota and Ascomycota were found to be the main HS degraders, while Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes were found to be the predominant phyla in humic-reducing microorganisms (HRMs). Some promising aspects of interactions between microorganisms and HSs are discussed as a feasible basis for nature-like biotechnologies, including the production of enzymes capable of catalyzing the oxidative binding of organic pollutants to HSs, while electron shuttling through the utilization of HSs by HRMs as electron shuttles may be used for the enhancement of organic pollutant biodegradation or lowering bioavailability of some metals. Utilization of HSs by HRMs as terminal electron acceptors may suppress electron transfer to CO2, reducing the formation of CH4 in temporarily anoxic systems. The data reported so far are mostly related to the use of HSs as redox compounds. HSs are capable of altering the composition of the microbial community, and there are environmental conditions that determine the efficiency of HSs. To facilitate the development of HS-based technologies, complex studies addressing these factors are in demand.

show abstract

Section: Humic Substances As a Complex Molecular Systemmentioning

confidence: 99%

Interactions between Humic Substances and Microorganisms and Their Implications for Nature-like Bioremediation Technologies

Куликова

Perminova

2021

Molecules

View full text Add to dashboard Cite

show abstract

“…As reported in the literature [3][4][5] HA can bind cations by electrostatic interactions, as well as non-ionic organic compounds by means of hydrogen bonds, dipole-dipole interactions, and hydrophobic interactions. Because of these properties, HA have been proposed as an adsorbent in wastewater purification plants [5][6][7]. On the other hand, HA cannot be removed from water by using conventional oxidation processes; however, several approaches are effective for treating recalcitrant compounds, such as adsorption [8,9] and advanced oxidation processes [10,11].…”

Section: Introductionmentioning

confidence: 99%

Macromolecular Structure of a Commercial Humic Acid Sample

et al. 2020

View full text Add to dashboard Cite

The molecular structure of a commercial sample of humic acids (HA) was investigated by membrane dialysis experiments (MD) and low-pressure size-exclusion chromatography (LP-SEC). MD showed that HA molecules were retained by dialysis membrane with a cut-off of 6-8 kDa, independently from HA concentration (15 or 150 mg L −1 ), NaHCO 3 concentration (0.005-2.0 mol L −1 ), and from propan 2-ol (0-5 v/v %). SEC experiments at low pressure gave chromatograms with a broad peak, with an elution volume between those of the globular proteins bovine serum albumin (molecular weight = 66.5 kDa) and lysozyme from egg (molecular weight = 14.4 kDa). The pattern of the chromatogram did not vary with HA concentration, and second-run chromatograms of single eluted fractions showed relatively sharp peaks. From these data, we reveal that the commercial HA sample analysed has a macromolecular structure rather than being a supramolecular aggregate of relatively small molecules, as recently proposed for some samples of HA obtained from different sources.

show abstract

“…As the most abundant pool of nonliving organic matter in the environment [ 2 ] and having a unique constellation of reactive features [ 3 ], HS has been studied for its effect on PAH bioremediation and the possibility of using it as a natural attenuating agent for cost effective, in situ bioremediation [ 4 ]. Three major effects have been identified.…”

Section: Introductionmentioning

confidence: 99%

Pyrene fate affected by humic acid amendment in soil slurry systems

et al. 2008

View full text Add to dashboard Cite

Background: Humic acid (HA) has been found to affect the solubility, mineralization, and bound residue formation of polycyclic aromatic hydrocarbons (PAHs). However, most of the studies on the interaction between HA and PAH concentrated on one or two of the three phases. Few studies have provided a simple protocol to demonstrate the overall effects of HA on PAH distribution in soil systems for all three phases.

show abstract

Remediation Chemistry of Humic Substances: Theory and Implications for Technology

Cited by 48 publications

References 132 publications

Interactions between Humic Substances and Microorganisms and Their Implications for Nature-like Bioremediation Technologies

Interactions between Humic Substances and Microorganisms and Their Implications for Nature-like Bioremediation Technologies

Macromolecular Structure of a Commercial Humic Acid Sample

Pyrene fate affected by humic acid amendment in soil slurry systems

Contact Info

Product

Resources

About