The characterization of dissolved organic matter extracted from different sources and their influence on cadmium uptake by <i>Microcystis aeruginosa</i>

Ni, Lixiao; Su, Lili; Li, Shiyin; Wang, Peifang; Li, Dandan; Xiang, Yu‐Tao; Li, Yi; Li, Yong; Li, Yiping; Wang, Chao

doi:10.1002/etc.3728

Cited by 27 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under this scenario, substantial DOM would be produced and released into soil solutions, and thus was involved in the Fe(III) co-precipitation to form OFC. Besides, previous studies indicated that DOM from different sources may have different structures and functional groups, which are expected to affect the interactions with Fe(III) or Cr(III). − In this work, to simulate these conditions, different DOM solutions were extracted from rice and rape straws (DOM_ri; DOM_ra, respectively), and these DOM solutions were used to synthesize OFC through co-precipitation with Fe 3+ . Batch experiments were conducted to investigate the effects of Cr(III) concentration, pH, and ionic strength on the Cr(III) sorption to OFC.…”

Section: Introductionmentioning

confidence: 99%

Molecular Sorption Mechanisms of Cr(III) to Organo-Ferrihydrite Coprecipitates Using Synchrotron-Based EXAFS and STXM Techniques

Xia

Yang

Yan

et al. 2020

Environ. Sci. Technol.

View full text Add to dashboard Cite

Ubiquitous organo-ferrihydrite coprecipitates (OFC) significantly affect the mobility and availability of Cr in soil through sorption, but the underlying sorption mechanisms remain unclear at the molecular level. Due to the potential formation of OFC in agricultural soils with returned crop straws, we synthesized OFC with rice/rape straw-derived carbon (C) sources and different loadings. The molecular sorption mechanisms of Cr(III) to the synthesized OFC under different conditions were investigated by Cr K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy and scanning transmission X-ray microscopy (STXM). Cr(III) sorption by OFC decreased with increasing C loading and decreasing pH, regardless of C sources. Moreover, inhibition of Cr(III) sorption to OFC with high C loading occurred when ionic strength (IS) increased, suggesting the presence of outer-sphere complexed Cr(III). EXAFS analysis revealed that more Cr(III) were bound to ferrihydrite of the OFC at a relatively high pH, and organically bound Cr(III) enhanced when increasing C loading and decreasing IS. STXM analysis strongly suggested that C loading reduced Cr(III) sorption through blocking the binding sites on the ferrihydrite, which overwhelmed Cr(III) retention by the direct binding of Cr(III) to carboxyl of the particulate organic matter (OM) and OM coated on the Fh fractions of the OFC. These findings facilitated the comprehensive understanding of the sorption mechanisms of Cr(III) to OFC at the molecular level, which will assist the prediction of Cr(III) mobility in soils, particularly for Cr(III)-contaminated agricultural soils with the application of crop straws.

show abstract

Section: Introductionmentioning

confidence: 99%

Molecular Sorption Mechanisms of Cr(III) to Organo-Ferrihydrite Coprecipitates Using Synchrotron-Based EXAFS and STXM Techniques

Xia

Yang

Yan

et al. 2020

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The absorption spectra of DOM were measured by UV-visible spectrophotometer scanned with a 10 mm quartz cuvette in the wavelength range of 200-700 nm with an interval of 2 nm. The absorption coe cients were calculated based on the equation a(λ) = 2.303×A/l and SUVA λ =a(λ)/DOC, using the absorbance values at 250 nm, 254 nm, 260 nm, 280 nm and 365 nm as A, respectivel (Ni et al 2017).…”

Section: Determination Of Uv-visible Spectral Characteristic Parametersmentioning

confidence: 99%

Effect of Dissolve Organic Matter Nn Cd Contaminated Cotton (Gossypium Hirsutum L.) Growth and Cd Uptake

Tao

Luo

Chen

et al. 2021

Preprint

View full text Add to dashboard Cite

In this study, we investigated the effects of originating from cotton straw dissolved organic matter (CM) and farmyard manure dissolved organic matter (FM) on the physiological growth and Cd uptake and transport of cotton under two exogenous Cd addition gradients (5 mg·kg− 1 and 10 mg·kg− 1; 0 mg·kg− 1 as control) by pot experiments, and characterized the structures of CM and FM by UV-Visible spectroscopy. The results showed that CM had more low aromatic and low molecular weight hydrophibic fulvic acid fractions than FM. Cd stress reduced the total biomass (especially the lints), leaf photosynthetic intensity and SPAD value, increased the Cd content and transport coefficient in all parts of cotton, and stimulated the oxidative stress response in leaves. At low Cd levels (no exogenous Cd addition), application of DOM promoted cotton growth and increased leaf photosynthetic intensity and SPAD values; at medium to high Cd levels (5 mg·kg− 1 and 10 mg·kg− 1 exgenous Cd addition), application of DOM exhibited inhibitory effects on cotton growth (as shown by reduced leaf photosynthetic capacity, altered membrane antioxidant regulation) and changed Cd content in various parts of cotton. In addition, the inhibitory effect of CM on cotton growth and the ability to change Cd content in all parts was greater than that of FM. The redundancy analysis showed that the effect of DOM addition on cotton growth changed from promotion to inhibition when the level of exogenous Cd contamination reached 5 mg·kg− 1. Therefore, both straw return and farmyard manure application (especially straw return) in agricultural fields with high Cd contamination levels (≥ 5 mg·kg− 1) can be harmful to cotton physiological growth and pose a threat to cotton production.

show abstract

“…The accumulation of Zn 2+ or Cd 2+ by M. aeruginosa increased exponentially with the initial concentration of metal ions. Ni et al [ 16 ] studied the absorption of cadmium by M. aeruginosa in the presence of dissolved organic matter (DOM) from different sources. It was found that the molecular weight of DOM in sediments and soil in Meiliang Bay of Taihu Lake was lower than that of M. aeruginosa .…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Heavy Metal Ions Copper, Cadmium and Nickel by Microcystis aeruginosa

Zeng

Wang

et al. 2022

IJERPH

View full text Add to dashboard Cite

To investigate the treatment effect of algae biosorbent on heavy metal wastewater, in this paper, the adsorption effect of M. aeruginosa powder on heavy metal ions copper, cadmium and nickel was investigated using the uniform experimental method, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and TG-DSC comprehensive thermal analysis. The experimental results showed that the initial concentration of copper ion solution was 25 mg/L, the temperature was 30 °C, the pH value was 8 and the adsorption time was 5 h, which was the best condition for the removal of copper ions by algae powder adsorption, and the removal rate was 83.24%. The initial concentration of cadmium ion solution was 5 mg/L, the temperature was 35 °C, the pH value was 8 and the adsorption time was 4 h, which was the best condition for the adsorption of cadmium ion by algae powder, and the removal rate was 92.00%. The initial nickel ion solution concentration of 15 mg/L, temperature of 35 °C, pH value of 7 and adsorption time of 1 h were the best conditions for the adsorption of nickel ions by algae powder, and the removal rate was 88.67%. The spatial structure of algae powder changed obviously before and after adsorbing heavy metals. The functional groups such as amino and phosphate groups on the cell wall of M. aeruginosa enhanced the adsorption effect of heavy metal ions copper, cadmium and nickel. Additionally, M. aeruginosa adsorption of heavy metal ions copper, cadmium, nickel is an exothermic process. The above experiments show that M. aeruginosa can be used as a biological adsorbent to remove heavy metals, which lays a theoretical foundation for the subsequent treatment of heavy metal pollution by algae.

show abstract

The characterization of dissolved organic matter extracted from different sources and their influence on cadmium uptake by Microcystis aeruginosa

Cited by 27 publications

References 38 publications

Molecular Sorption Mechanisms of Cr(III) to Organo-Ferrihydrite Coprecipitates Using Synchrotron-Based EXAFS and STXM Techniques

Molecular Sorption Mechanisms of Cr(III) to Organo-Ferrihydrite Coprecipitates Using Synchrotron-Based EXAFS and STXM Techniques

Effect of Dissolve Organic Matter Nn Cd Contaminated Cotton (Gossypium Hirsutum L.) Growth and Cd Uptake

Adsorption of Heavy Metal Ions Copper, Cadmium and Nickel by Microcystis aeruginosa

Contact Info

Product

Resources

About