High adsorption capacity of nitrobenzene from aqueous solution using activated carbons prepared from vegetable waste

2020 ◽  
Vol 39 (6) ◽  
Author(s):  
Zoubida Kecira ◽  
Oumessaâd Benturki ◽  
Asma Benturki ◽  
Mounir Daoud ◽  
Pierre Girods
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Activated Carbons ◽  
Vegetable Waste ◽  
High Adsorption ◽  
High Adsorption Capacity

Mesoporous activated carbon from polyethyleneterephthalate (PET) waste: pollutant adsorption in aqueous solution

2018 ◽  
Vol 42 (17) ◽  
pp. 14612-14619 ◽  
Author(s):  
Cínthia Soares de Castro ◽  
Luísa Nagyidai Viau ◽  
Júlia Teixeira Andrade ◽  
Thais A. Prado Mendonça ◽  
Maraísa Gonçalves
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Activated Carbons ◽  
Large Molecule ◽  
High Adsorption ◽  
Pet Waste ◽  
Mesoporous Activated Carbon ◽  
High Adsorption Capacity

Activated carbons of high mesoporosity were prepared from PET wastes and presented high adsorption capacity, including relatively large-molecule dyes.

A green method based on electro-assisted and photo-assisted regeneration for removal of chromium(VI) from aqueous solution

2018 ◽  
Vol 2017 (3) ◽  
pp. 896-902 ◽  
Author(s):  
Jianyu Xing ◽  
Yu Shen ◽  
Bin Yang ◽  
Dongdong Feng ◽  
Wei Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Glycol ◽  
Adsorption Capacity ◽  
Filter Paper ◽  
High Adsorption ◽  
High Concentration ◽  
Green Method ◽  
Chromium Vi ◽  
Chemical Regeneration ◽  
High Adsorption Capacity

Abstract In general, spent adsorbent is regenerated using high-concentration chemicals. Although chemical regeneration is efficient, it often leads to adsorbent damage and secondary waste. To overcome these problems, electro-assisted and photo-assisted regeneration were proposed in this study for the remediation of hexavalent chromium (Cr(VI)). Filter paper was decorated with polyethylene glycol (PEG) and polypyrrole (PPy) to fabricate a FP/PEG/PPy nanocomposite, which could be used as an adsorbent for Cr(VI) with a high adsorption capacity. Moreover, it could be regenerated by electro-assisted or photo-assisted regeneration to reduce eluent use. As a result, secondary waste could be greatly reduced.

Lead Retention on an Active Carbon Prepared from Date Kernels (Daglet Nour)

2018 ◽  
Vol 39 ◽  
pp. 139-146
Author(s):  
Nora Seghairi ◽  
Fateh Barbari ◽  
Karim Mihoub
Keyword(s):  
Adsorption Capacity ◽  
Contact Time ◽  
Lead Concentration ◽  
Activated Carbons ◽  
High Adsorption ◽  
Batch Tests ◽  
Treatment Processes ◽  
Increase With Increase ◽  
Long Time ◽  
High Adsorption Capacity

Metals occur naturally in rocks, water, air and soil and are also produced by human activities, including industrial and mining activities. For the most part, these heavy metals are hardly biodegradable, they are recognized, toxic or harmful to humans and animals. The use of activated carbon has remained for a long time and to this day the most effective adsorbent due to its high adsorption capacity mainly associated to its large specific surface. But this process is very expensive.This has therefore encouraged research by orienting them towards treatment processes using less costly and widely available natural materials. The objective of our study was to develop a simple, efficient and environmentally friendly sorption depollution technique on available and inexpensive media. We have studied the adsorption of lead on activated carbons prepared from date kernels. Batch tests were carried out with synthetic lead solution in order to study different operating parameters such as the effect of contact time, pH, initial lead concentration and adsorbent dosage. The results obtained showed that the adsorption capacity of the lead ions increase with increase in time until a saturation plateau was reached. The equilibrium was reached after a time close to 120 min and a plateau was observed from 120 to 180 min. The adsorption of lead on this adsorbent obeys the laws of Freundlich and Langmuir with a maximum capacity of 16.613 mg / g. Finally, we think that the results obtained during this study at the laboratory scale, confirm the interest practical and economical use of these two materials in the field of water treatment.

Carbonized medlar-core particles as a new biosorbent for removal of Cu2+ from aqueous solution and study of its surface morphology

2016 ◽  
Vol 74 (1) ◽  
pp. 236-245 ◽  
Author(s):  
Narges Samadani Langeroodi ◽  
Elaheh Safaei
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
High Adsorption ◽  
Langmuir Adsorption ◽  
Adsorption Isotherm Models ◽  
Freundlich Adsorption Isotherm ◽  
High Adsorption Capacity ◽  
Core Particles

The objective of this study was to investigate the use of carbonized medlar-core particles as a new biosorbent to remove Cu2+ from aqueous solution. Fourier transform infrared spectroscopy and scanning electron microscopy were used to characterize the biosorbent. This paper reports the effects of adsorbent dose, pH, temperature and concentration of adsorbate. Batch isotherm studies were also performed to understand the ability of the adsorbent. The adsorption behavior of the Cu2+ was studied using Langmuir and Freundlich adsorption isotherm models. The maximum adsorption capacity determined from the Langmuir adsorption equation has been found as 43.478 mg.g−1 at 298.15 K. The adsorption of Cu2+ by medlar core in carbonized form was spontaneous and endothermic. It was also found that the biosorption of Cu2+ followed second-order kinetics. Carbonized medlar-core particles showed great potential in aqueous solution due to the high adsorption capacity.

The performance of porous hexagonal BN in high adsorption capacity towards antibiotics pollutants from aqueous solution

2017 ◽  
Vol 325 ◽  
pp. 71-79 ◽  
Author(s):  
Qianqian Song ◽  
Yi Fang ◽  
Zhenya Liu ◽  
Lanlan Li ◽  
Yiran Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
High Adsorption ◽  
High Adsorption Capacity

Functionalized and reusable polyethylene fibres for Au(iii) extraction from aqueous solution with high adsorption capacity and selectivity

RSC Advances ◽  
2016 ◽  
Vol 6 (90) ◽  
pp. 87221-87229 ◽  
Author(s):  
Li-juan Pang ◽  
Rong Li ◽  
Qian-hong Gao ◽  
Jiang-tao Hu ◽  
Zhe Xing ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Radiation Grafting ◽  
High Adsorption ◽  
High Adsorption Capacity

Functional UHMWPE fibres, used for efficient and selective Au(iii) adsorption from aqueous solutions, were successfully synthesized by a radiation grafting method.

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