A hybrid bionanocomposite for Pb (II) ion removal from water: synthesis, characterization and adsorption kinetics studies

2022 ◽  
Author(s):  
Maya Sharma ◽  
Shweta Chouksey ◽  
Laxmi Gond ◽  
Anjali Bajpai
Keyword(s):  
Adsorption Kinetics ◽  
Ion Removal ◽  
Kinetics Studies

scholarly journals Removal of As3+, As5+, Sb3+, and Hg2+ ions from aqueous solutions by pure and co-precipitated akaganeite nanoparticles: adsorption kinetics studies

RSC Advances ◽  
2020 ◽  
Vol 10 (70) ◽  
pp. 42688-42698
Author(s):  
Verónica Villacorta ◽  
César Augusto Barrero ◽  
María-Belén Turrión ◽  
Francisco Lafuente ◽  
Jean-Marc Greneche ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Kinetics ◽  
Kinetics Studies

Morphologically-modified akaganeite nanoparticles adsorbed As3+, As5+, Sb3+ and Hg2+. Sb3+ was the better adsorbed pollutant, whereas Hg2+ was the least.

Adorption and Kinetics Studies of Baritite on Cr (VI) from Aqueous Solutions

2011 ◽  
Vol 347-353 ◽  
pp. 281-284
Author(s):  
Peng Ge ◽  
Li Juan Wan ◽  
Ya Jing Xu
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Natural Zeolite ◽  
Second Order ◽  
Order Model ◽  
Kinetics Studies ◽  
Pseudo Second Order ◽  
Kinetics Of

Among the investigated clays and minerals (kaolinite, natural zeolite, manual zeolite, bentonite, sepiolite, sepiolite amianthus, tremolite amianthus, vermiculite and baritite), the baritite clay was selected as the optimal adsorbent for aqueous Cr (VI). The Cr (VI) adsorption capacity on baritite clay reached as high as 39.01 mg∙g−1 at 20°C. Then the adsorption kinetics of Cr (VI) by the baritite clay were investigated in details. Results showed that the pseudo-second-order model was a suitable description for the adsorption kinetics and fitted well with the experimental data.

Adsorption of Congo Red from Aqueous Solution onto Chitosan/Rectorite Composite

2013 ◽  
Vol 690-693 ◽  
pp. 438-441 ◽  
Author(s):  
Tao Feng ◽  
Lei Xu
Keyword(s):  
Aqueous Solution ◽  
Adsorption Kinetics ◽  
Congo Red ◽  
Adsorption Process ◽  
Order Equation ◽  
Interlayer Distance ◽  
Kinetics Studies ◽  
Pseudo Second Order ◽  
Cr Concentration ◽  
Cr Uptake

The chitosan/rectorite composite was prepared and characterized by XRD. The interlayer distance of rectorite was enlarged from 2.53 nm to 3.01 nm. Congo red (CR) was selected as a model anionic dye and the adsorption tests of CR onto chitosan/rectorite composite were carried out. The results showed that the CR adsorption process is dependent on pH and initial CR concentration and temperature. The maximal CR uptake by chitosan/rectorite composite was 73.8 mg g-1 in the test. Adsorption kinetics studies indicated that the sorption processes were better fitted by pseudo-second order equation.

Adsorption Kinetics Studies on the Double‐Chain Surfactants AOT and NaDEHP

2005 ◽  
Vol 26 (6) ◽  
pp. 683-687
Author(s):  
Yuxia Luan ◽  
Guiying Xu ◽  
Xia Xin ◽  
Yiming Li ◽  
Fang Wang
Keyword(s):  
Adsorption Kinetics ◽  
Double Chain ◽  
Kinetics Studies

The removal of Cu(II) and Pb(II) ions from aqueous solutions by temperature-sensitive hydrogels based on N-isopropylacrylamide and itaconic acid

2021 ◽  
pp. 1-19
Author(s):  
Bengi Özkahraman ◽  
Eren Yıldırım ◽  
Serkan Emik ◽  
Işıl Acar
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Kinetics ◽  
Itaconic Acid ◽  
Competitive Adsorption ◽  
Adsorption Properties ◽  
Temperature Sensitive ◽  
Order Model ◽  
Ion Removal ◽  
Adsorption Capacities ◽  
Pseudo Second Order

This study deals with the potential use of poly(N-isopropylacrylamide-co-itaconic acid) temperature-sensitive hydrogels as an adsorbent for the removal of Cu(II) and Pb(II) ions from aqueous solutions. For this aim, the adsorption properties of hydrogels were examined by adsorption capacities, adsorption isotherm, and adsorption kinetics experiments. To describe the adsorption characteristics of hydrogels, the obtained experimental data were evaluated by Langmuir, Freundlich, Redlich-Peterson, and Dubinin-Radushkevich isotherm models. Adsorption kinetics experiments were carried out not only in single systems but also in binary systems where both ions were at equal initial concentrations for competitive adsorption studies. To predict the behaviors of the competitive and non-competitive adsorption process of ions onto hydrogels, the experimental adsorption data were analyzed by the pseudo-first-order model and the pseudo-second-order model. According to non-competitive ion removal findings, the adsorption capacities followed order Cu(II) >  Pb(II) for all hydrogels, and the pseudo-second-order kinetic model explained the adsorption properties of the hydrogels. Competitive ion removal studies showed that all hydrogels were selective to Cu(II) ion. Furthermore, in the case of comparative investigations both of competitive Cu(II) and competitive Pb(II) removal by hydrogels, the metal ion removal capacity of N10 hydrogel was found as a bit higher than that of N7.5 and N5 in 48 h. That is, as the acidic group content increased in the hydrogel network, the adsorption capacity values also increased. In addition, the reusability of temperature-sensitive hydrogels seems possible without regeneration or after regenerating with acid, in case the temperature is increased above the LCST. Furthermore, even if it cannot be reused, these hydrogels that retain metal ions reach very small volumes by shrinking when the LSCT is exceeded, and thus they can be eliminated more easily than other conventional gels due to their small size. As a result, this temperature-sensitive hydrogel may propose as an alternative environmentally friendly adsorbent candidate for can be used for water purification and wastewater treatment.

Adsorption Kinetics Studies of Polymeric Nanocomposite Coagulants

2013 ◽  
Vol 21 (3) ◽  
pp. 161-170
Author(s):  
Seher Uzunsakal ◽  
Serhat Zeytinci ◽  
Ömer L. Uyanık ◽  
Nurseli Uyanık
Keyword(s):  
Adsorption Kinetics ◽  
Polymeric Nanocomposite ◽  
Kinetics Studies

Acrylic acid-grafted polyaniline fibers for nickel ion removal from water: synthesis, characterization and adsorption kinetics

2021 ◽  
Author(s):  
Sabariah Kamarudin ◽  
Zainatul Akma Abdul Rahman ◽  
Mohd Saiful Asmal Rani ◽  
Masita Mohammad ◽  
Norhasimah Mohammed ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Adsorption Kinetics ◽  
Nickel Ion ◽  
Ion Removal

Design and synthesis of novel chitosan–based nanocomposite containing mesoporous nanosilica MCM-41: Effective absorbent for the elimination of Pb (II) from aqueous solution

2020 ◽  
pp. 009524432095189
Author(s):  
Mina Maghsoudi ◽  
Mojtaba Abbasian ◽  
Khalil Farhadi
Keyword(s):  
Adsorption Process ◽  
In Situ Polymerization ◽  
Optimum Conditions ◽  
Design And Synthesis ◽  
Ion Removal ◽  
Kinetics Studies ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Mcm 41

A novel chitosan–based nanocomposite containing mesoporous nanosilica MCM-41 was synthesized, and its application as a good adsorbent for Pb (II) ions was investigated. In this context, MCM-41 was modified by 3-(Triethoxysilyl)-propylamine (3-APTES) to prepare MCM-41-NH2, and then MCM-41-NH2-graft-polyarcrylamide-co-polyacrylic acide-graft-chitosan [(MCM-41-NH2-g-poly(AAm-co-AA)-g-CS] nanocomposite was fabricated by in situ polymerization. The morphology and structure of nanocomposite were characterized by FT-IR, FE-SEM, EDS, XRD, AAS and TGA analysis. The results exhibited that active functional groups such as (-NH2) and (-COOH) on the nanocomposite surface reacted with Pb (II) ions via coordination bond. Maximum Pb (II) ion removal was seen at pH (6). The Pb (II) concentration and reaction time were 60 mg L−1 and 75 min as optimum conditions. Kinetics studies exhibited that adsorption experimental data were well adjusted to Langmuir isotherm, and the adsorption process onto polymer followed the pseudo-second order kinetics. As a result, it is expected that the synthesized nanocomposite can provide a promising prospect in the field of wastewater treatment.

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