Three-dimensional macroscopic aminosilylated nanocellulose aerogels as sustainable bio-adsorbents for the effective removal of heavy metal ions

2021 ◽  
Author(s):  
Biyao Geng ◽  
Zhengyang Xu ◽  
Peng Liang ◽  
Jin Zhang ◽  
Peter Christie ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Three Dimensional ◽  
Effective Removal

Facile Synthesis of Graphene-Based Aerogels and Their Applications for Adsorption of Heavy Metal Ions

2019 ◽  
Vol 18 (02) ◽  
pp. 1850019
Author(s):  
Huiyuan Yu ◽  
Jiayi Zhu ◽  
Hongbo Ren ◽  
Shuxin Liu
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Self Assembly ◽  
Heavy Metal Ions ◽  
Three Dimensional ◽  
Annealing Process ◽  
Interconnected Network ◽  
Facile Synthesis ◽  
Thermal Annealing Process ◽  
Highly Porous

Graphene-based aerogels with a three-dimensional interconnected network were fabricated via the hydrothermal self-assembly and thermal-annealing process. The aerogels were characterized by means of scanning electron microscopy and atomic absorption spectroscopy. The graphene-based aerogels showed highly porous structure and adsorption capacity for heavy metal ions. Thus, they would be the promising materials for removal of heavy metal ions from water.

Imprinted polymers for the removal of heavy metal ions from water

2011 ◽  
Vol 64 (6) ◽  
pp. 1325-1332 ◽  
Author(s):  
Syed Ashraf ◽  
Angela Cluley ◽  
Ckarlos Mercado ◽  
Anja Mueller
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
High Capacity ◽  
Random Copolymer ◽  
Complete Removal ◽  
Ion Exchange Resins ◽  
Effective Removal ◽  
Removal Of Heavy Metals ◽  
Exchange Resins

In wastewater treatment, the removal of heavy metals is difficult due to the limited affinity of heavy metal ions to ion exchange resins. Here imprinting polymerization is used to develop resins with high capacity and selectivity for heavy metal ions for water treatment. A random copolymer of methacrylate and methacrylamide was found to be most effective for the removal of hydrophilic metal complexes, like CdCl2, ZnCl2, and the metalloid NaH2AsO4, particularly when the porosity of these resins is increased. For hydrophobic complexes imprinting emulsion polymerization was developed and data for the effective removal of mercury dithizonate will be described. Complete removal for up to 80 ppm of cadmium and mercury with only 200 mg of imprinted resin was obtained; competition and co-imprinting experiments are described as well.

Effective Removal of Heavy Metal Ions Using Mn2O3 Doped Polyaniline Nanocomposite

2014 ◽  
Vol 14 (4) ◽  
pp. 2937-2946 ◽  
Author(s):  
K. Rajakumar ◽  
S. Dinesh Kirupha ◽  
S. Sivanesan ◽  
Rajamaniccam L. Sai
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Effective Removal ◽  
Doped Polyaniline ◽  
Polyaniline Nanocomposite

Synthesis of three-dimensional graphene oxide foam for the removal of heavy metal ions

2014 ◽  
Vol 593 ◽  
pp. 122-127 ◽  
Author(s):  
Yinlin Lei ◽  
Fei Chen ◽  
Yunjie Luo ◽  
Long Zhang
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Three Dimensional

Influence of heavy metal ions on the spectra and charge characteristics of DOM of municipal sewage secondary effluent

2017 ◽  
Vol 77 (4) ◽  
pp. 1098-1106 ◽  
Author(s):  
Yi Yang ◽  
Xinpei Ma ◽  
Xiaxia Yang ◽  
Huining Xu
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Fluorescence Intensity ◽  
Heavy Metal Ions ◽  
Three Dimensional ◽  
Municipal Sewage ◽  
Secondary Effluent ◽  
Conditional Stability ◽  
Conditional Stability Constant ◽  
Additional Dosage

Abstract The spectral and charged characteristics of dissolved organic matter (DOM) in municipal sewage secondary effluent influenced by heavy metal ions were studied by three-dimensional fluorescence spectroscopy, ultraviolet spectrometry, etc. As the Cu(II) concentration increased, the fluorescence intensity of the DOM's fluorescence peak reduced. When the Cu(II) concentration was 100 μmol/L, the fluorescence intensity of the humic-like acid in the DOM reduced by 19.5%–27.6%. However, there was no obvious change in the fluorescence intensity when Cd(II) was added. According to the modified Stern–Volmer equation, the conditional stability constant lgK and the proportion of the fluorescent functional groups of the DOM binding with Cu(II) were 2.19–2.69 and 16%–48%, respectively. The UV253/UV203 value changed little with the additional dosage of metal ions below 10 μmol/L, which increased as the concentration of Cu(II) or Pb(II) increased from 10–100 μmol/L. As the metal concentrations increase, the absolute values of the Zeta potential and the particle sizes of the DOM basically increased. The results showed that Cu(II) had the strongest binding ability to the groups that emitted fluorescence in the secondary effluent DOM compared to Pb(II) and Cd(II).

Ligand-immobilized spent alumina catalyst for effective removal of heavy metal ions from model contaminated water

2018 ◽  
Vol 6 (4) ◽  
pp. 4623-4633 ◽  
Author(s):  
Mirabbos Hojamberdiev ◽  
Shahlo S. Daminova ◽  
Zukhra C. Kadirova ◽  
Khasan T. Sharipov ◽  
Felix Mtalo ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Contaminated Water ◽  
Alumina Catalyst ◽  
Effective Removal
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