scholarly journals Retraction: Superior adsorption capacity of hierarchical iron oxide@magnesium silicate magnetic nanorods for fast removal of organic pollutants from aqueous solution

2021 ◽  
Author(s):  
Shouwei Zhang ◽  
Wenqing Xu ◽  
Meiyi Zeng ◽  
Jie Li ◽  
Jiaxing Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Iron Oxide ◽  
Adsorption Capacity ◽  
Organic Pollutants ◽  
Magnesium Silicate ◽  
Magnetic Nanorods ◽  
Fast Removal

Retraction of ‘Superior adsorption capacity of hierarchical iron oxide@magnesium silicate magnetic nanorods for fast removal of organic pollutants from aqueous solution’ by Shouwei Zhang et al., J. Mater. Chem. A, 2013, 1, 11691–11697, DOI: 10.1039/C3TA12767B.

Porous magnetic carbon sheets from biomass as an adsorbent for the fast removal of organic pollutants from aqueous solution

2014 ◽  
Vol 2 (12) ◽  
pp. 4391-4397 ◽  
Author(s):  
Shouwei Zhang ◽  
Meiyi Zeng ◽  
Jiaxing Li ◽  
Jie Li ◽  
Jinzhang Xu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Organic Pollutants ◽  
Synthetic Strategy ◽  
Magnetic Carbon ◽  
Fast Removal

Carbon-stabilized Fe/Fe3C nanoparticles with excellent adsorption capacity for dyes were fabricated through a facile in situ synthetic strategy.

Removal of Organic Pollutants in Solution by Bamboo Charcoal

2013 ◽  
Vol 699 ◽  
pp. 554-556 ◽  
Author(s):  
Zi Lin Meng ◽  
Yi He Zhang ◽  
Qi An ◽  
Feng Zhu Lv ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Kinetic Model ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Organic Pollutants ◽  
Organic Contaminants ◽  
Low Cost ◽  
Environmentally Friendly ◽  
Bamboo Charcoal ◽  
Key Factors

Bamboo charcoal (BC) as an environmentally friendly and low-cost material receives widespread attention. Recently, much attention has been focused on the use of BC as adsorbent to treat wastewater. This paper provides an overview of the adsorption of organic contaminants in solution by using BC. The sorption behaviors of BC with various organic pollutants, and the kinetic model adopted to explain the adsorption rate of organic pollutants from aqueous solution were also reviewed. The adsorption capacity, the isotherm model, and several key factors such as modification, surface area, are discussed in this paper. Possible improvement of BC to treat organic contaminants in aqueous solution is also proposed.

scholarly journals Fast removal of Co(ii) from aqueous solution using porous carboxymethyl chitosan beads and its adsorption mechanism

RSC Advances ◽  
2018 ◽  
Vol 8 (24) ◽  
pp. 13370-13387 ◽  
Author(s):  
Wenqiang Luo ◽  
Zhishan Bai ◽  
Yong Zhu
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Adsorption Mechanism ◽  
Carboxymethyl Chitosan ◽  
Chitosan Beads ◽  
Fast Kinetics ◽  
Fast Removal

The as-prepared adsorbent exhibits excellent adsorption capacity and fast kinetics for Co(ii).

scholarly journals Biorenewable triblock copolymers consisting of l-lactide and ε-caprolactone for removing organic pollutants from water: a lifecycle neutral solution

BMC Chemistry ◽  
2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Katrina T. Bernhardt ◽  
Haley G. Collins ◽  
Amy M. Balija
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Organic Pollutants ◽  
Rose Bengal ◽  
Triblock Copolymer ◽  
Triblock Copolymers ◽  
Environmental Pollutants ◽  
World Population ◽  
Complete Disappearance ◽  
Inclusion Constant

Abstract Background Current methods of removing organic pollutants from water are becoming ineffective as the world population increases. In this study, a series of biorenewable triblock copolymers with hydrophobic poly(ε-caprolactone) block and hydrophilic poly(l-lactide) blocks were synthesized and tested as agents to remove environmental pollutants from an aqueous solution. The percent of pollutant removed and equilibrium inclusion constants were calculated for the polymers. These values were compared to previously known removal agents for their effectiveness. Results Triblock copolymer samples removed over 70% of the polycyclic aromatic hydrocarbon (PAH) phenanthrene from an aqueous solution, with selectivity for the adsorption of phenanthrene over other PAHs tested. The inclusion constant was 7.4 × 105 M−1 and adsorption capacity was 5.8 × 10−7 mol phenanthrene/g polymer. Rose Bengal was used to further probe the nature of interactions between the copolymers and a small molecule guest. Solid samples of the block-poly(l-lactide)–block-poly(ε-caprolactone)–block-poly(l-lactide) (PLLA–PCL–PLLA) systems were found to rapidly remove over 90% of Rose Bengal from aqueous solution, resulting in a complete disappearance of the characteristic pink color. Solutions of the copolymers in dichloromethane also removed Rose Bengal from water with a similar level of efficiency. Large inclusion constant values were obtained, ranging from 1.0 × 105 to 7.9 × 105 M−1, and the average adsorption capacity value of 6.2 × 10−7 mol/g polymer was determined. Aged polymer samples exhibited different adsorption characteristics and mechanistic theories for the removal of Rose Bengal were determined. Conclusion The triblock copolymer consisting of l-lactide and ε-caprolactone was effective in removing various organic pollutants in aqueous environments. It is a biorenewable material which leads to minimal waste production during its lifecycle. These polymers were in general more effective in removing organic pollutants than commercially available pollution removal systems.

Removal of uranium(vi) from aqueous solution by magnetic yolk–shell iron oxide@magnesium silicate microspheres

RSC Advances ◽  
2014 ◽  
Vol 4 (10) ◽  
pp. 5021 ◽  
Author(s):  
Meiyi Zeng ◽  
Yongshun Huang ◽  
Shouwei Zhang ◽  
Shengxian Qin ◽  
Jiaxing Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Iron Oxide ◽  
Magnesium Silicate

TEM observation of iron oxide pillars in montmorillonite

1990 ◽  
Vol 48 (4) ◽  
pp. 882-883
Author(s):  
H. Mori ◽  
Y. Murata ◽  
H. Yoneyama ◽  
H. Fujita
Keyword(s):  
Aqueous Solution ◽  
Iron Oxide ◽  
Fine Particles ◽  
Aqueous Suspension ◽  
Volume Ratio ◽  
Exchange Capacity ◽  
Nano Composites ◽  
Pillared Montmorillonite ◽  
Topographic Features ◽  
Transmission Electron

Recently, a new sort of nano-composites has been prepared by incorporating such fine particles as metal oxide microcrystallites and organic polymers into the interlayer space of montmorillonite. Owing to their extremely large specific surface area, the nano-composites are finding wide application[1∼3]. However, the topographic features of the microstructures have not been elucidated as yet In the present work, the microstructures of iron oxide-pillared montmorillonite have been investigated by high-resolution transmission electron microscopy.Iron oxide-pillared montmorillonite was prepared through the procedure essentially the same as that reported by Yamanaka et al. Firstly, 0.125 M aqueous solution of trinuclear acetato-hydroxo iron(III) nitrate, [Fe3(OCOCH3)7 OH.2H2O]NO3, was prepared and then the solution was mixed with an aqueous suspension of 1 wt% clay by continuously stirring at 308 K. The final volume ratio of the latter aqueous solution to the former was 0.4. The clay used was sodium montmorillonite (Kunimine Industrial Co.), having a cation exchange capacity of 100 mequiv/100g. The montmorillonite in the mixed suspension was then centrifuged, followed by washing with deionized water. The washed samples were spread on glass plates, air dried, and then annealed at 673 K for 72 ks in air. The resultant film products were approximately 20 μm in thickness and brown in color.

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