Mobilization of Cu and Pb from multi-metal contaminated soils by dissolved humic substances extracted from leonardite and factors affecting the process

Damian, Gianina Elena; Micle, Valer; Sur, Ioana Monica

doi:10.1007/s11368-019-02291-w

Cited by 26 publications

(11 citation statements)

References 25 publications

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“…Leonardite is highly oxidized lignite, and it contains much higher contents of humic acids (HAs) (about 15%) than compost, manure, straw, etc. (below 1%) [ 40 , 41 ]. Leonardite is a source of soluble HAs [ 42 ] and commercially available humic substances (HS) (e.g., Powhumus WSG-85) [ 41 ] and non-commercially available HS, which are directly extracted from lignite [ 43 ].…”

Section: Novel Was and Their Applicability For Hms Removal From Somentioning

confidence: 99%

“…(below 1%) [ 40 , 41 ]. Leonardite is a source of soluble HAs [ 42 ] and commercially available humic substances (HS) (e.g., Powhumus WSG-85) [ 41 ] and non-commercially available HS, which are directly extracted from lignite [ 43 ]. HS extracted using leonardite was shown to be a low-cost and highly effective natural surfactant for treatment of industrial soils [ 44 ].…”

Section: Novel Was and Their Applicability For Hms Removal From Somentioning

confidence: 99%

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New-Generation Washing Agents in Remediation of Metal-Polluted Soils and Methods for Washing Effluent Treatment: A Review

Gusiatin

Kulikowska

Klik

2020

IJERPH

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Soil quality is seriously reduced due to chemical pollution, including heavy metal (HM) pollution. To meet quality standards, polluted soils must be remediated. Soil washing/soil flushing offers efficient removal of heavy metals and decreases environmental risk in polluted areas. These goals can be obtained by using proper washing agents to remove HMs from soil. These washing agents should not pose unacceptable threats to humans and ecosystems, including soil composition. Currently, it is desirable to use more environmentally and economically attractive washing agents instead of synthetic, environmentally problematic chemicals (e.g., ethylenediaminetetraacetic acid (EDTA)). The usefulness of novel washing agents for treatment of heavy metal-contaminated soils is being intensively developed, in terms of the efficiency of HM removal and properties of washed soils. Despite the unquestionable effectiveness of soil washing/flushing, it should be remembered that both methods generate secondary fluid waste (spent washing solution), and the final stage of the process should be treatment of the contaminated spent washing solution. This paper reviews information on soil contamination with heavy metals. This review examines the principles and status of soil washing and soil flushing. The novel contribution of this review is a presentation of the sources and characteristics of novel washing agents and chemical substitutes for EDTA, with their potential for heavy metal removal. Methods for treating spent washing solution are discussed separately.

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Section: Novel Was and Their Applicability For Hms Removal From Somentioning

confidence: 99%

Section: Novel Was and Their Applicability For Hms Removal From Somentioning

confidence: 99%

New-Generation Washing Agents in Remediation of Metal-Polluted Soils and Methods for Washing Effluent Treatment: A Review

Gusiatin

Kulikowska

Klik

2020

IJERPH

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“…River and marine sediments are used as raw materials for this process as well. However, the idea of obtaining humic and fulvic acids from deposits of lignite or peat tends to reconcile economic development with the rational management of non-renewable resources for non-energetic purposes and the global balance of ecosystems [ 7 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-Assisted Extraction of Humic Substances from Peat: Assessment of Process Efficiency and Products’ Quality

et al. 2022

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Results of efficiency of obtaining humic substances (HSs) from peat in traditional alkaline extraction (TAE) and ultrasound-assisted alkaline extraction (UAAE) are presented. The influence of the duration of the process and ultrasound intensity on the efficiency of extraction of humic acids (HAs) and fulvic acids (FAs) extraction was determined. The composition of the fulvic acid fraction was examined depending on the type of eluent used. Fulvic acids were divided into fractions using columns packed with DAX-8 resin. For this process, 0.1 M NaOH and 0.5 M NH3∙H2O were used as eluents. For the quality assessment of specific fulvic acids fractions, spectroscopic methods (UV-Vis and FTIR) were used. Ultrasound had a positive effect on HS extraction efficiency, especially in increasing the amount of a desired hydrophobic fraction of fulvic acids (HPO). However, a negative effect of the excessive prolongation and ultrasound intensity (approximately 400 mW∙cm−2) on the extraction efficiency of HPO eluted with 0.1 M NaOH solution was observed. Using peat as a raw carbon material for the HS extraction process can be used as an alternative industrial application of peat. UAAE may be considered as an alternative method to TAE, which provides a higher efficiency in HS isolation from peat.

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“…Cd and Pb have no known biological functions, and are classified as non-essential elements that are toxic even at very low concentrations for human health [10][11][12]. Cd is associated with negative health effects on renal, skeletal, pulmonary, reproductive, and cardiovascular systems, which are classified as group I carcinogens to humans [13].…”

Section: Introductionmentioning

confidence: 99%

Development and Validation of a Spectrometric Method for Cd and Pb Determination in Zeolites and Safety Evaluation

Șenilă

Cadar

Miu³

2020

Molecules

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An analytical method based on microwave-assisted acid digestion and atomic absorption spectrometry with graphite furnace as atomization source was developed and validated for determining trace elements (Cd and Pb) in zeolites used as dietary supplements, for their characterization and safety evaluation. The method was checked for the main performance parameters according to the legislation requirements in the field of dietary supplements. In all cases, the obtained performance parameters were satisfactory. The selectivity study showed no significant non-spectral matrix effect. The linearity study was conducted for the calibration curves in the range of 0–10 ng mL−1 for Cd and 0–30 ng mL−1 for Pb. The obtained limits of detection (LoDs) and the limits of quantification (LoQs) were sufficiently low in order to allow Pb and Cd determination in dietary supplements. For the internal quality control, certified reference materials were analysed and good recoveries were obtained. The precision study was performed in terms of repeatability and reproducibility, considering the requirements imposed by the Commission Decision (2007/333/EC) and the method fulfilled these performance parameters. Expanded measurement uncertainties were estimated to 11% for Cd and 10% for Pb. Cd and Pb content were measured in real zeolite samples and, using these data, a safety evaluation was carried out.

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Mobilization of Cu and Pb from multi-metal contaminated soils by dissolved humic substances extracted from leonardite and factors affecting the process

Cited by 26 publications

References 25 publications

New-Generation Washing Agents in Remediation of Metal-Polluted Soils and Methods for Washing Effluent Treatment: A Review

New-Generation Washing Agents in Remediation of Metal-Polluted Soils and Methods for Washing Effluent Treatment: A Review

Ultrasound-Assisted Extraction of Humic Substances from Peat: Assessment of Process Efficiency and Products’ Quality

Development and Validation of a Spectrometric Method for Cd and Pb Determination in Zeolites and Safety Evaluation

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