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.

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.

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.

Synthesis, characterization and adsorption capacity of magnetic carbon composites activated by CO2: implication for the catalytic mechanisms of iron salts

2016 ◽  
Vol 4 (48) ◽  
pp. 18942-18951 ◽  
Author(s):  
Feng Qian ◽  
Xiangdong Zhu ◽  
Yuchen Liu ◽  
Shilai Hao ◽  
Zhiyong Jason Ren ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Organic Pollutants ◽  
Carbon Composites ◽  
Iron Salts ◽  
Catalytic Mechanisms ◽  
Magnetic Carbon ◽  
Maximum Removal

The production of novel magnetic carbon composites for maximum removal performance of organic pollutants from the environment.

Adsorption of Organic Pollutants by Ferric Oxide Modified Montmorillonite

2014 ◽  
Vol 955-959 ◽  
pp. 80-83 ◽  
Author(s):  
Xiao Long Hu ◽  
Ying Ping Huang ◽  
Ai Qing Zhang ◽  
Xiao Rong Zhao
Keyword(s):  
Adsorption Capacity ◽  
Organic Pollutants ◽  
Ferric Oxide ◽  
Adsorption Process ◽  
Acidic Solution ◽  
Freundlich Isotherm ◽  
Adsorbent Dosage ◽  
Modified Montmorillonite ◽  
Pseudo Second Order

Ferric oxide modified montmorillonite (Fe2O3@M) was prepared with the method of microwave-assisted ion-exchange and in-situ precipitation, with Fe2O3 nanoparticles intercalated into the interlayer of montmorillonite. Rhodamine B (RhB) was employed as a probe compound to study the adsorption characteristics of organic pollutants with Fe2O3@M as the adsorbent. The effect of pH and adsorbent dosage were investigated and the results showed that the maximum of adsorption capacity for RhB was 58.8 mg g-1. The adsorption capacity of Fe2O3@M for RhB was augmented along with the increase of adsorbent dosage. The Fe2O3 modified montmorillonite exhibits a much better adsorption capacity in an acidic solution than that in an alkaline solution. The adsorption process was well fitted the Langmuir and Freundlich isotherm model, respectively, and the adsorption reaction kinetics complied with a pseudo second-order kinetics model.

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.

Utilization of Waste of Enzymes Biomass as Biosorbent for the Removal of Dyes from Aqueous Solution in Batch and Fluidized Bed Column

2020 ◽  
Vol 71 (1) ◽  
pp. 1-12
Author(s):  
Salman H. Abbas ◽  
Younis M. Younis ◽  
Mohammed K. Hussain ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Particle Size ◽  
Adsorption Capacity ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Fungal Biomass ◽  
Solution Flow Rate ◽  
Maximum Adsorption Capacity ◽  
Solution Flow

The biosorption performance of both batch and liquid-solid fluidized bed operations of dead fungal biomass type (Agaricusbisporus ) for removal of methylene blue from aqueous solution was investigated. In batch system, the adsorption capacity and removal efficiency of dead fungal biomass were evaluated. In fluidized bed system, the experiments were conducted to study the effects of important parameters such as particle size (701-1400�m), initial dye concentration(10-100 mg/L), bed depth (5-15 cm) and solution flow rate (5-20 ml/min) on breakthrough curves. In batch method, the experimental data was modeled using several models (Langmuir,Freundlich, Temkin and Dubinin-Radushkviechmodels) to study equilibrium isotherms, the experimental data followed Langmuir model and the results showed that the maximum adsorption capacity obtained was (28.90, 24.15, 21.23 mg/g) at mean particle size (0.786, 0.935, 1.280 mm) respectively. In Fluidized-bed method, the results show that the total ion uptake and the overall capacity will be decreased with increasing flow rate and increased with increasing initial concentrations, bed depth and decreasing particle size.

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