Sustainable Removal of Cr(VI) from Wastewater Using Green Composites of Zero-Valent Iron and Natural Clays DOI Open Access
Slavica Lazarević,

Ivona Janković‐Častvan,

Željko Radovanović

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(18), P. 7904 - 7904

Published: Sept. 10, 2024

Composites for efficient removal of hexavalent chromium Cr(VI) from industrial wastewater were obtained by deposition nano-zero-valent iron (nZVI), synthesized environmentally friendly synthesis using oak leaf extract, on inexpensive, natural, readily available and cheap natural raw materials, sepiolite (SEP) or kaolinite/illite (KUb) clay, as support. nZVI particles deposited the FeCl3 solution different concentrations, with same volume ratio extract/FeCl3 (3:1), masses SEP KUb. Physico–chemical characterization (SEM/EDS, FTIR, BET, determination point zero charge) composites was performed. The results SEM BET analyses suggested more homogeneous onto than KUb, which ensures greater availability surface anions. Therefore, higher at all investigated initial pH values (pHi) (3, 4 5) achieved composites. adsorption indicated that elimination via combined effect reduction adsorption. total pHi = 3 approximately KUb composites, but lower indicating Cr(III) compared to reduced Cr(VI). SEP/nZVI composite highest efficiency applied real 5. demonstrated high capacity, validated assumption a good dispersion is beneficial showed produced green can be materials wastewater.

Language: Английский

Escherichia coli and phosphate mediated the distinct retention of small-sized nano-plastic particles in seawater-saturated porous sands DOI
Siyi Sun, Nan Xu, Jing Yang

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 490, P. 137805 - 137805

Published: March 3, 2025

Language: Английский

Citations

0
Effect of Sulfide on the Cotransport of Ferrihydrite and Birnessite Colloids with Phosphorus in Saturated Porous Media DOI
Shuxin Huang, Caixiang Zhang, Lu Chen

et al.

ACS ES&T Water, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Language: Английский

Citations

0
Enhanced Photoaging of Functionalized Nanoplastics by Cadmium Ions and Corresponding Diverse Transport Behaviors of Products in Porous Media: Mechanisms and Modeling DOI
Siyi Sun, Xuelian Wang, Yan Liang

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: May 6, 2025

The photoaging of nanoplastics (NPs) mediated by heavy metals and the transport mechanisms products have been widely overlooked. This study demonstrated that cadmium ion (Cd(II)) mediation accelerated polystyrene NPs (carboxyl-modified CNPs, amino-modified ANPs, sulfonate, amino comodified SANPs) generating more •OH 1O2, thereby altering their physicochemical properties consequent behavior. Kinetic attachment models Derjaguin-Landau-Verwey-Overbeek theory proved Cd(II)-mediated process had diverse effects on retention surface-functionalized in water-saturated sand media. In particular, Cd(II) at 50 mg/L increased hydroxyl carboxyl groups aged facilitating 20.3% with reduced k2 (0.036 vs 0.021) φmax (74.804 KBT 85.127 KBT) values. Conversely, enhanced ANP agglomerates driven amino-carboxyl electrostatic attraction ripening adsorption additional heterogeneous surfaces sand. presence reinforced fragments ANPs deposited led to remarkable detachment. Aged SANPs retained original mobility after due negligible changes surface groups, whereas associated a higher k1d (0.347 0.183) became reversible be flushed out water. provided insights for evaluating cocontamination risks watersheds surrounding soils.

Language: Английский

Citations

0
Let the two sides of the same coin meet—Environmental health and safety-oriented development of functional nanomaterials for environmental remediations DOI Creative Commons

Shuangyu Wu,

Jian Peng, Stephanie Ling Jie Lee

et al.

Eco-Environment & Health, Journal Year: 2024, Volume and Issue: 3(4), P. 494 - 504

Published: June 29, 2024

Nanotechnology and engineered nanomaterials have been at the forefront of technological breakthroughs 21st century. With challenges increasingly complex emergent environmental pollution, nanotechnology offers exciting complementary approaches to achieve high efficiencies with low or green energy input. However, unknown unintended hazardous effects health risks associated hinder its full-scale implementation. Therefore, development safer lies in critical balance between applications implications nanomaterials. To facilitate constructive dialogue two sides (

Language: Английский

Citations

1
Sustainable Removal of Cr(VI) from Wastewater Using Green Composites of Zero-Valent Iron and Natural Clays DOI Open Access
Slavica Lazarević,

Ivona Janković‐Častvan,

Željko Radovanović

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(18), P. 7904 - 7904

Published: Sept. 10, 2024

Composites for efficient removal of hexavalent chromium Cr(VI) from industrial wastewater were obtained by deposition nano-zero-valent iron (nZVI), synthesized environmentally friendly synthesis using oak leaf extract, on inexpensive, natural, readily available and cheap natural raw materials, sepiolite (SEP) or kaolinite/illite (KUb) clay, as support. nZVI particles deposited the FeCl3 solution different concentrations, with same volume ratio extract/FeCl3 (3:1), masses SEP KUb. Physico–chemical characterization (SEM/EDS, FTIR, BET, determination point zero charge) composites was performed. The results SEM BET analyses suggested more homogeneous onto than KUb, which ensures greater availability surface anions. Therefore, higher at all investigated initial pH values (pHi) (3, 4 5) achieved composites. adsorption indicated that elimination via combined effect reduction adsorption. total pHi = 3 approximately KUb composites, but lower indicating Cr(III) compared to reduced Cr(VI). SEP/nZVI composite highest efficiency applied real 5. demonstrated high capacity, validated assumption a good dispersion is beneficial showed produced green can be materials wastewater.

Language: Английский

Citations

0