Nanofibrous-spherical cage mimicking a ball of pearl-necklaces for super capture of heavy metal ions

2021 ◽  
Author(s):  
Youngkyun Jung ◽  
Ung Su Choi ◽  
Young Gun Ko
Keyword(s):  
Heavy Metal ◽  
Adverse Effects ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
High Performance ◽  
Poor Response ◽  
Separation Technology ◽  
Long Term Adverse Effects

The late and poor response in the initial stages of big heavy metal leakage accidents cause long-term adverse effects on nature and humans. Fast and high-performance separation technology with low...

scholarly journals Nanocelllulose Based Adsorbents for Heavy Metal Ions Removal

2021 ◽  
Author(s):  
Rongrong Si ◽  
Daiqi Wang ◽  
Yehong Chen ◽  
Dongmei Yu ◽  
Qijun Ding ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
High Performance ◽  
Advanced Technologies ◽  
Good Biocompatibility ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

Abstract Heavy metal ion pollutions are of serious threat for our human health, and advanced technologies on removal of heavy metal ions in water or soil are in the focus of intensive research worldwide. Nanocellulose based adsorbents are emerging as an environmentally friendly appealing materials platform for heavy metal ions removal as nanocellulose has higher specific surface area, excellent mechanical properties and good biocompatibility. In this review, we briefly compare the differences of three kinds of nanocellulose and their preparation method. Then we cover the most recent work on nanocellulose based adsorbents for heavy metal ions removal, and present an in-depth discussion of the modification technologies for nanocellulose in assembling high performance heavy ions adsorbent process. By introducing functional groups, such as amino, carboxyl, phenolic hydroxyl, and thiol, the nanocellulose based adsorbents not only remove single heavy metal ions through ion exchange, chelation/complexation/coordination, electrostatic attraction, hydrophobic actions, binding affinity and redox reactions, but also can selectively adsorb multiple heavy ions in water. Finally, some challenges of nanocellulose based adsorbents for heavy metal ions are also prospected. We anticipate that the review supplies some guides for nanocellulose based adsorbents applied in heavy metal ions removal field.

Experimental Research on Engineering Property of Heavy Metal-Contaminated Kaolinite

2011 ◽  
Vol 94-96 ◽  
pp. 1921-1929 ◽  
Author(s):  
Zhi Bin Liu ◽  
Xin Ma ◽  
Wen Long Dai
Keyword(s):  
Heavy Metal ◽  
Compressive Strength ◽  
Electrical Resistivity ◽  
Metal Ions ◽  
Unconfined Compressive Strength ◽  
Heavy Metal Ions ◽  
Engineering Property ◽  
Contamination Concentration ◽  
Expansion Capacity

Due to release and accumulation of industrial contaminants in natural soil in some regions, and the long-term interaction between leachate and clay which is adopted as isolation material of contaminants, the engineering property variation of clay soils after having been polluted by heavy metal ions gradually has drawn more and more attention of environmental geotechnical engineers. With relatively high chemical stability and low expansion coefficient kaolinite is widely distributed and usually used in engineering practice. In this research, Pb, Zn, and Cu-contaminated kaolinite specimens of controlled initial dry density and water content were manually prepared through static compaction. Then expansion capacity, unconfined compression, electrical resistivity and one-dimensional consolidation tests were conducted. It is found that the expansion capacity of contaminated kaolinite is influenced by the type and concentration of heavy metal ion. The unconfined compressive strength of heavy metal-contaminated kaolinite is decreased in a short period, but it may increase in a long term. Unconfined compressive strength of the same type of heavy metal-contaminated kaolinite will change with the contamination concentration. The electrical resistivity of kaolinite would be decreased when contaminated by heavy metal ions. The higher the contamination concentration is, the lower the electrical resistivity will be. All the compression indexes of heavy metal-contaminated kaolinite become lower than that of the clean kaolinite, and it also depends on both the type of heavy metal and contamination concentration. For the three types of heavy metal ions, Pb has the greatest influence on the engineering property of kaolinite, while the effects of Zn and Cu are quite similar.

High performance of phytic acid-functionalized spherical poly-phenylglycine particles for removal of heavy metal ions

2020 ◽  
Vol 518 ◽  
pp. 146206 ◽  
Author(s):  
Monaam Ben Ali ◽  
Fengyun Wang ◽  
Rabah Boukherroub ◽  
Mingzhu Xia
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Phytic Acid ◽  
Heavy Metal Ions ◽  
High Performance

Facile preparation of highly hydrophilic, recyclable high-performance polyimide adsorbents for the removal of heavy metal ions

2016 ◽  
Vol 306 ◽  
pp. 210-219 ◽  
Author(s):  
Jieyang Huang ◽  
Yaxin Zheng ◽  
Longbo Luo ◽  
Yan Feng ◽  
Chaoliang Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
High Performance ◽  
Facile Preparation
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