The Impact of Humic Substances as Remediation Agents to the Speciation Forms of Metals in Soil

Burlakovs, Juris; Kļaviņš, Māris; Osinska, L.; Purmalis, Oskars

doi:10.1016/j.apcbee.2013.05.034

Cited by 32 publications

(18 citation statements)

References 9 publications

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“…The ability to form complexes with metal ions depends on the types of soil and metal, as well as HS amount in soil. Remediation using HS has shown good results for diminishing the content of biologically available copper and lead (Burlakovs et al 2013).…”

Section: Detoxification Of Metal Salt Solutionsmentioning

confidence: 98%

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Pollutant toxicity and detoxification by humic substances: mechanisms and quantitative assessment via luminescent biomonitoring

Kudryasheva

Tarasova

2014

Environ Sci Pollut Res

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The paper considers mechanisms of detoxification of pollutant solutions by water-soluble humic substances (HSs), natural detoxifying agents. The problems and perspectives of bioassay application for toxicity monitoring of complex solutions are discussed from ecological point of view. Bioluminescence assays based on marine bacteria and their enzymes are of special attention here; they were shown to be convenient tools to study the detoxifying effects on cellular and biochemical levels. The advantages of bioluminescent enzymatic assay for monitoring both integral and oxidative toxicities in complex solutions of model pollutants and HS were demonstrated. The efficiencies of detoxification of the solutions of organic oxidizers and salts of metals (including radioactive ones) by HS were analyzed. The dependencies of detoxification efficiency on time of exposure to HS and HS concentrations were demonstrated. Antioxidant properties of HS were considered in detail. The detoxifying effects of HS were shown to be complex and regarded as 'external' (binding and redox processes in solutions outside the organisms) and/or 'internal' organismal processes. The paper demonstrates that the HS can stimulate a protective response of bacterial cells as a result of (1) changes of rates of biochemical reactions and (2) stabilization of mucous layers outside the cell walls. Acceleration of auto-oxidation of NADH, endogenous reducer, by HS was suggested as a reason for toxicity increase in the presence of HS due to abatement of reduction ability of intracellular media.

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Section: Detoxification Of Metal Salt Solutionsmentioning

confidence: 98%

“…They are able to bind the metal ions in soils (Burlakovs et al 2013). The ability to form complexes with metal ions depends on the types of soil and metal, as well as HS amount in soil.…”

Section: Detoxification Of Metal Salt Solutionsmentioning

confidence: 99%

Pollutant toxicity and detoxification by humic substances: mechanisms and quantitative assessment via luminescent biomonitoring

Kudryasheva

Tarasova

2014

Environ Sci Pollut Res

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“…[11] 0.1863 mg/kg of rice seeding pb in pot soil of 500mg/kg pb, reaching the national Lead limits standard in China, which benefit from synthetical effect such as biochar, attapulgite and humic acid, beside PbRB [12][13][14]. Field remediation experiment has been influenced by multiple factors such as weather, soil, and hydrology, different from stimulate pot experiment.…”

Section: Resultsmentioning

confidence: 99%

Isolation and characterisation of lead-resistant bacteria from a reverse screen model of simulation soil rice culture

Xue¹,

Meng²,

Xie³

et al. 2017

Proceedings of the 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017)

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Abstract. CGMCC5515(Rif r ) were domesticated step by step. Pb-resistant bacteria (PbRB) of CGMCC5515 were selected in directional enrichment and screened with TTC from the pot rice rhizosphere soil with lead and other remediate material, the reverse screen model of simulation soil rice culture with reproducible TTC-detective method could be used as a tool in the R & D of bioremediate agent of lead-polluted soil. The PbRB with lead tolerance 1500 mg L -1 were identified as B. subtilis on the basis of morphological, biochemical and partial sequencing of their 16S rRNA and gyrB genes. Multiple stress tolerant CGMCC5515 immobilizated in alginate beads, formulated with biochar, attapulgite humic acid, reduced the pb of rice seeding to normal level. These results have reinforced the biotechnological potential of CGMCC5515 as a biological control agent.

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“…at 2 and 20 rpm when iron dissolution is insufficient and when the iron dissolution rate at the least affects the decontamination process resprctively. It is well known that the humic acids form strong complexes with heavy metals including Fe(II) and Fe(III) [3][4][5][6]. Their solubility depends on the ratio between the concentrations of humic acids and metal ions and pH.…”

Section: A Decontamination Of Solutionmentioning

confidence: 99%

“…Humic acids and fulvic acids are two major components of humic substances. These acids are organic polyelectrolytes containing various functional groups such as carboxylic, phenolic, and hydroxyl groups, and some functional groups containing nitrogen, sulfur, and phosphorus which form strong complexes with heavy metals [3][4][5][6].Humic and fulvic acids, being soluble and capable of forming strong complexes, are responsible for heavy metal spreading in soils. The implementation of effective techniques and processes for the treatment of contaminated wastewater and groundwater in order to remove or minimize the concentration of pollutants is essential for the environment protection and human health.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Metallic Iron with Solutions Containing Humic Acids and Cu(II)

Binkienė¹,

Gylienė²,

Ragauskas³

et al. 2017

IJEAB

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The Impact of Humic Substances as Remediation Agents to the Speciation Forms of Metals in Soil

Cited by 32 publications

References 9 publications

Pollutant toxicity and detoxification by humic substances: mechanisms and quantitative assessment via luminescent biomonitoring

Pollutant toxicity and detoxification by humic substances: mechanisms and quantitative assessment via luminescent biomonitoring

Isolation and characterisation of lead-resistant bacteria from a reverse screen model of simulation soil rice culture

Interaction of Metallic Iron with Solutions Containing Humic Acids and Cu(II)

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