Novel nanomaterials for environmental remediation of toxic metal ions and radionuclides

Abundantly available biomass wastes from agriculture can serve as effective environmental remediation materials. In this study, activated biochar was fabricated from macadamia nutshell (MCN) through carbonization and chemical modification. The resultant biochars were used as adsorbents to remove toxic metal ions such as Cu2+ and Zn2+ from aqueous solutions. The results showed that the activated MCN biochar has a high adsorption capacity for toxic metal ions. When MCN biochar was activated with K2CO3, the adsorption efficiencies for Cu2+ and Zn2+ were 84.02% and 53.42%, respectively. With H3PO4 activation, the Cu2+- and Zn2+-adsorption performances were 95.92% and 67.41%, respectively. H2O2-modified MCN biochar had reasonable Cu2+- and Zn2+-adsorption efficiencies of 79.33% and 64.52%, respectively. The effects of pH, adsorbent concentration and adsorption time on the removal performances of Cu2+ and Zn2+ in aqueous solution were evaluated. The results exhibited that the activated MCN biochar showed quick adsorption ability with an optimal pH of 4 and 4.5 for both Cu2+ and Zn2+, respectively.

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Inorganic layered ion-exchangers for decontamination of toxic metal ions in aquatic systems

Journal of Materials Chemistry A ◽

10.1039/c7ta05076c ◽

2017 ◽

Vol 5 (37) ◽

pp. 19593-19606 ◽

Cited By ~ 25

Author(s):

Wenya He ◽

Kelong Ai ◽

Xiaoyan Ren ◽

Shengyan Wang ◽

Lehui Lu

Keyword(s):

Ion Exchange ◽

Metal Ions ◽

Environmental Remediation ◽

Toxic Metal ◽

Aquatic Systems ◽

Ion Exchangers ◽

High Chemical ◽

Toxic Metal Ions ◽

Surface Areas ◽

Radiolytic Stability

Inorganic layered ion-exchangers have received extensive attention in the field of environmental remediation due to their high chemical, thermal and radiolytic stability, large surface areas, and excellent ion exchange capacities.

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Colorimetric sensing approaches based on silver nanoparticles aggregation for determination of toxic metal ions in water sample: a review

International Journal of Environmental & Analytical Chemistry ◽

10.1080/03067319.2021.1873315 ◽

2021 ◽

pp. 1-16

Author(s):

Rajat Singh ◽

Rahul Mehra ◽

Ankita Walia ◽

Simmy Gupta ◽

Prince Chawla ◽

...

Keyword(s):

Silver Nanoparticles ◽

Metal Ions ◽

Water Sample ◽

Toxic Metal ◽

Colorimetric Sensing ◽

Toxic Metal Ions

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The facile soft-template-morphology-controlled (STMC) synthesis of ZnIn2S4 nanostructures and their excellent morphology-dependent adsorption properties

Journal of Materials Chemistry A ◽

10.1039/c9ta11800d ◽

2020 ◽

Vol 8 (4) ◽

pp. 1986-2000 ◽

Cited By ~ 3

Author(s):

Afaq Ahmad Khan ◽

Arif Chowdhury ◽

Sunita Kumari ◽

Sahid Hussain

Keyword(s):

Metal Ions ◽

Toxic Metal ◽

Adsorption Properties ◽

Organic Dye ◽

Soft Template ◽

Toxic Metal Ions ◽

Controlled Morphology

ZnIn2S4 nanostructures were fabricated with controlled morphology and utilized for the adsorption of an organic dye and toxic metal ions.

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Tuning the sensitivity towards mercury via cooperative binding to d-fructose: dual fluorescent chemosensor based on 1,8-naphthyridine-boronic acid derivative

RSC Advances ◽

10.1039/d1ra02122b ◽

2021 ◽

Vol 11 (24) ◽

pp. 14862-14870

Author(s):

Marina Rajadurai ◽

E. Ramanjaneya Reddy

Keyword(s):

Metal Ions ◽

Acid Derivative ◽

Boronic Acid ◽

Toxic Metal ◽

Fluorescent Chemosensor ◽

Cooperative Binding ◽

Toxic Metal Ions

This new dual d-fructose–mercury chemosensor is the first example of utilizing boronic acid–diol complexation for enhancement of the sensor's sensitivity towards toxic metal ions.

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