Tannic acid-based adsorbent with superior selectivity for lead(II) capture: Adsorption site and selective mechanism

Zou, Liezhao; Shao, Ping; Zhang, Kai; Yang, Liming; You, Deng; Shi, Hui; Pavlostathis, Spyros G.; Lai, Weiqiang; Liang, Dahao; Luo, Xubiao

doi:10.1016/j.cej.2019.01.160

Cited by 108 publications

(31 citation statements)

References 42 publications

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“…At pH 4, the dissociation degree of TA is 7.1·10 −2 , which corresponds to approximately 10% ionization of TA [ 45 ]. Thus, proton replacement from hydroxyl groups seems to be the main mechanism of metal removal under soil flushing conditions [ 46 ].…”

Section: Resultsmentioning

confidence: 99%

Short-Term Soil Flushing with Tannic Acid and Its Effect on Metal Mobilization and Selected Properties of Calcareous Soil

Gusiatin

Kaal²,

Wasilewska

et al. 2021

IJERPH

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Cadmium, Cu, Ni, Pb, and Zn removal via soil flushing with tannic acid (TA) as a plant biosurfactant was studied. The soil was treated for 30 h in a column reactor at a constant TA concentration and pH (3%, pH 4) and at variable TA flow rates (0.5 mL/min or 1 mL/min). In the soil leachates, pH, electrical conductivity (EC), total dissolved organic carbon, and metal concentrations were monitored. Before and after flushing, soil pH, EC, organic matter content, and cation exchange capacity (CEC) were determined. To analyze the organic matter composition, pyrolysis as well as thermally assisted hydrolysis and methylation coupled with gas chromatography-mass spectrometry were used. Metal fractionation in unflushed and flushed soil was analyzed using a modified sequential extraction method. The data on cumulative metal removal were analyzed using OriginPro 8.0 software (OriginLab Corporation, Northampton, MA, USA) and were fitted to 4-parameter logistic sigmoidal model. It was found that flushing time had a stronger influence on metal removal than flow rate. The overall efficiency of metal removal (expressed as the ratio between flushed metal concentration and total metal concentration in soil) at the higher flow rate decreased in this order: Cd (86%) > Ni (44%) > Cu (29%) ≈ Zn (26%) > Pb (15%). Metals were removed from the exchangeable fraction and redistributed into the reducible fraction. After flushing, the soil had a lower pH, EC, and CEC; a higher organic matter content; the composition of the organic matter had changed (incorporation of TA structures). Our results prove that soil flushing with TA is a promising approach to decrease metal concentration in soil and to facilitate carbon sequestration in soil.

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Section: Resultsmentioning

confidence: 99%

Short-Term Soil Flushing with Tannic Acid and Its Effect on Metal Mobilization and Selected Properties of Calcareous Soil

Gusiatin

Kaal²,

Wasilewska

et al. 2021

IJERPH

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“…The complete range of experiments and independent variables are presented in Table S8. † The total number of experimental runs are expressed as N and the number of factors as n. 36,50 The total number of experiments are represented by eqn (2):…”

Section: Design Of Experimentsmentioning

confidence: 99%

“…Moreover, dyes and heavy metals there are proven to have strong carcinogenic, mutagenic and toxic effects towards aquatic organisms, human beings and ecological environments. 2,3 In this light, lead (Pb(II)) is an extremely toxic heavy metal, which causes encephalopathy, anaemia and liver damage, and affects the central nervous system. [4][5][6] On the other hand, malachite green (MG) is a synthetic dye of basic nature, which is extensively used in the textile industry and in curing bacterial or fungal infections and parasites in sh.…”

Section: Introductionmentioning

confidence: 99%

Insights into the competitive adsorption of pollutants on a mesoporous alumina–silica nano-sorbent synthesized from coal fly ash and a waste aluminium foil

et al. 2020

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“…The contaminated water is containing several metal ions along with the Pb(II) ion which competes with each other for available adsorption sites and may affect Pb(II) selectivity [75,76]. The Pb(II) adsorption percentage of synthesized catalysts was studied in the presence of diverse metal ions.…”

Section: Selectivity Study Of Co 3 O 4 Nanoparticlesmentioning

confidence: 99%

A comparative study of micro- and nano-structured di-nuclear Co(II) complex, designed to produce efficient nano-sorbent of Co3O4 applicable in the removal of Pb2+

Razmara

2020

SN Appl. Sci.

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A di-nuclear inorganic complex, formulated as [Co 2 (H 2 O) 5 (pdc) 2 ]·2H 2 O (1) that pdc 2− is pyridine-2,6-dicarboxylato has been synthesized under hydrothermal condition and sonochemical irradiation. Depending on the synthetic conditions, different morphology has been obtained for complex 1. Complex 1 hydrothermal (hc) which obtained as single crystal is a micro-structured compound and was characterized by single crystal X-ray diffraction. Complex 1 ultrasound (uc) is a nano-structured compound and obtained as precipitate. Structural comparison of hc and uc by Fourier-transform infrared spectroscopy (FT-IR), powder X-ray diffraction, and scanning electron microscopy (SEM) revealed that both synthesized complexes have the same structure with different particles size and morphology. In this study, a new synthetic route has been developed to prepare Co 3 O 4 nanoparticles for environmental catalytic applications. Effective sorbents Co 3 O 4 -hc and Co 3 O 4 -uc were prepared by thermolysis of dinuclear cobalt complexes and characterized by FT-IR, SEM, XRD, and Brunauer-Emmett-Teller specific surface area. Co 3 O 4 -hc and Co 3 O 4 -uc were used as nano-sorbents for the removal Pb(II) from aqueous solution. Detailed sorption studies showed that both synthetic sorbents are valuable to remove Pb(II) from wastewater. The effective catalytic performance of the as-prepared sorbents can be attributed to the physicochemical features of synthetic catalysts, such as mesoporous nature, homogenous dispersion of the active phase, small particle size and high surface area. The effects of contact time, pH, Pb(II) and adsorbent dosage to remove Pb(II) were investigated. Maximum adsorption percent of Co 3 O 4 -hc and Co 3 O 4 -uc at room temperature were found to be 90 and 92.2%, respectively. The selectivity of the as-prepared catalysts toward metal ions Pb(II), Co(II), Cr(III), Cu(II), Fe(II), Hg(II), Mn(II) and Ni(II) exhibited that Co 3 O 4 catalysts have the highest selectivity toward Pb(II). Also, the synthetic catalysts Co 3 O 4 -hc and Co 3 O 4 -uc showed an excellent cycling performance for Pb(II) removal up to 85.3 and 83.4% recovery over five cycles.

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Tannic acid-based adsorbent with superior selectivity for lead(II) capture: Adsorption site and selective mechanism

Cited by 108 publications

References 42 publications

Short-Term Soil Flushing with Tannic Acid and Its Effect on Metal Mobilization and Selected Properties of Calcareous Soil

Short-Term Soil Flushing with Tannic Acid and Its Effect on Metal Mobilization and Selected Properties of Calcareous Soil

Insights into the competitive adsorption of pollutants on a mesoporous alumina–silica nano-sorbent synthesized from coal fly ash and a waste aluminium foil

A comparative study of micro- and nano-structured di-nuclear Co(II) complex, designed to produce efficient nano-sorbent of Co3O4 applicable in the removal of Pb2+

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