Adsorption of Pb(II) from Aqueous Solutions by Chemically Modified Zeolite supported Carbon Nanotubes: Equilibrium, Kinetic, and Thermodynamic Studies

Ramana, D.K. Venkata; Reddy, D. Harikishore Kumar; Kumar, B. Naresh; Seshaiah, K.; Rao, G. Purna Chandra; Lu, Chungsying

doi:10.1080/01496395.2012.690638

Cited by 21 publications

(7 citation statements)

References 39 publications

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“…† For example, the adsorbed Pb(II) on PE/LG-CNTs-Ni/Al 2 O 3 composite is about 3 folds higher than those of CNTs/bagasse composite (56.6 mg g À1 ) and CNTs@zeolite composite (55.74 mg g À1 ). 39,40 On the other hand, K l , the Langmuir bonding term related to interaction energies, can be employed to analyze the bonding strength between adsorbate molecular and the adsorption sites of adsorbent. According to the results in Table 2, The affinities between Pb(II) and composite can be further predicted by K l using a dimensionless separation factor R L according to the following equation (eqn (3)):…”

Section: Characteristics Of Carbon Materials-ni/al 2 O 3 Compositesmentioning

confidence: 99%

Carbon nanotubes/Al₂O₃ composite derived from catalytic reforming of the pyrolysis volatiles of the mixture of polyethylene and lignin for highly-efficient removal of Pb(ii)

et al. 2021

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Section: Characteristics Of Carbon Materials-ni/al 2 O 3 Compositesmentioning

confidence: 99%

Carbon nanotubes/Al₂O₃ composite derived from catalytic reforming of the pyrolysis volatiles of the mixture of polyethylene and lignin for highly-efficient removal of Pb(ii)

et al. 2021

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“…The usage of zeolite carbon nanotubes (ZCNTs) as a novel approach for the removal of lead (2+) ions resulted in a 55.74 mg/g adsorption capacity. This ZCNTs kinetics model fits the Langmuir isotherm model to a pseudo-second-order degree [96]. Chen et al described their work with multiwalled carbon nanotubes functionalized with KMnO 4 /H 2 SO 4 and multiwalled carbon nanotubes functionalized with HNO 3 [97].…”

Section: Adsorption Of Carbon Nanotubesmentioning

confidence: 81%

Recent Insights and Multifactorial Applications of Carbon Nanotubes

et al. 2021

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Nanotechnology has undergone significant development in recent years, particularly in the fabrication of sensors with a wide range of applications. The backbone of nanotechnology is nanostructures, which are determined on a nanoscale. Nanoparticles are abundant throughout the universe and are thought to be essential building components in the process of planet creation. Nanotechnology is generally concerned with structures that are between 1 and 100 nm in at least one dimension and involves the production of materials or electronics that are that small. Carbon nanotubes (CNTs) are carbon-based nanomaterials that have the structure of tubes. Carbon nanotubes are often referred to as the kings of nanomaterials. The diameter of carbon is determined in nanometers. They are formed from graphite sheets and are available in a variety of colors. Carbon nanotubes have a number of characteristics, including high flexibility, good thermal conductivity, low density, and chemical stability. Carbon nanotubes have played an important part in nanotechnology, semiconductors, optical and other branches of materials engineering owing to their remarkable features. Several of the applications addressed in this review have already been developed and used to benefit people worldwide. CNTs have been discussed in several domains, including industry, construction, adsorption, sensors, silicon chips, water purifiers, and biomedical uses, to show many treatments such as injecting CNTs into kidney cancers in rats, drug delivery, and directing a near-infrared laser at the cancers. With the orderly development of research in this field, additional therapeutic modalities will be identified, mainly for dispersion and densification techniques and targeted drug delivery systems for managing and curing posterior cortical atrophy. This review discusses the characteristics of carbon nanotubes as well as therapeutic applications such as medical diagnostics and drug delivery.

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“…Figure 4a shows that the removal rate of TC increased and adsorption capacity gradually decreased with increasing La‐CNTs dosage from 0.01 to 0.06 g. The maximum TC removal rate of 90.59% was achieved with a La‐CNTs dosage of 0.05 g. The maximum adsorption capacity of 18.12 mg/L was also achieved with this dosage. This was because additional adsorption sites were obtained by increasing the La‐CNTs dosage for the adsorption reaction 37 . Therefore, the adsorption capacity decreased due to the higher number of adsorption sites.…”

Section: Resultsmentioning

confidence: 99%

“…The Weber‐Morris kinetic model is often applicable for analyzing the internal diffusion rate in reactions, and it is expressed as Equation () 53,54 :

q_{t} = k_{d} t^{\frac{true}{1}} + C,

where q t (mg/g) is the amount of TC adsorbed at time t ,

k_{d}

is the intra‐particle diffusion rate constant (mg/g/min 0.5 ), and C is a constant. If q t versus t 1/2 generates a straight line that passes through the origin, internal diffusion is controlled by a single rate 37,55 . However, if it is multi‐linear, the adsorption process is affected by two or more steps.…”

Section: Resultsmentioning

confidence: 99%

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Preparation, characterization, and adsorption properties of modified carbon nanotubes for highly effective removal of tetracycline from aquaculture wastewater

Zhang

et al. 2022

Env Prog and Sustain Energy

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In this study, the adsorption of the antibiotic compound tetracycline (TC) from aquaculture wastewater was investigated using lanthanum-modified carbon nanotubes (La-CNTs) prepared by impregnation method. The composition and morphology of La-CNTs were characterized by EDS, XRD, and BET analysis. Single-factor experiments were performed to investigate their effect on the adsorption of TC by La-CNTs. The adsorption kinetics and adsorption isotherms indicated that the pseudo-second-order kinetic model and Langmuir adsorption isotherm equation adequately described the adsorption behavior of La-CNTs. Moreover, the maximum adsorption capacity (Q m ) was 93.46 mg/g. The thermodynamics studies indicated that adsorption of TC by La-CNTs were endothermic and spontaneous respectively.Further, the adsorption force of La-CNTs on TC could be attributed to van der Waals force, π-π adsorbate-adsorbent interaction and electrostatic interaction. Based on these experimental results, this novel composite material shows good potential application value for the removal of TC from aquaculture wastewater.

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Adsorption of Pb(II) from Aqueous Solutions by Chemically Modified Zeolite supported Carbon Nanotubes: Equilibrium, Kinetic, and Thermodynamic Studies

Cited by 21 publications

References 39 publications

Carbon nanotubes/Al₂O₃ composite derived from catalytic reforming of the pyrolysis volatiles of the mixture of polyethylene and lignin for highly-efficient removal of Pb(ii)

Carbon nanotubes/Al₂O₃ composite derived from catalytic reforming of the pyrolysis volatiles of the mixture of polyethylene and lignin for highly-efficient removal of Pb(ii)

Recent Insights and Multifactorial Applications of Carbon Nanotubes

Preparation, characterization, and adsorption properties of modified carbon nanotubes for highly effective removal of tetracycline from aquaculture wastewater

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Adsorption of Pb(II) from Aqueous Solutions by Chemically Modified Zeolite supported Carbon Nanotubes: Equilibrium, Kinetic, and Thermodynamic Studies

Cited by 21 publications

References 39 publications

Carbon nanotubes/Al2O3 composite derived from catalytic reforming of the pyrolysis volatiles of the mixture of polyethylene and lignin for highly-efficient removal of Pb(ii)

Carbon nanotubes/Al2O3 composite derived from catalytic reforming of the pyrolysis volatiles of the mixture of polyethylene and lignin for highly-efficient removal of Pb(ii)

Recent Insights and Multifactorial Applications of Carbon Nanotubes

Preparation, characterization, and adsorption properties of modified carbon nanotubes for highly effective removal of tetracycline from aquaculture wastewater

Contact Info

Product

Resources

About

Carbon nanotubes/Al₂O₃ composite derived from catalytic reforming of the pyrolysis volatiles of the mixture of polyethylene and lignin for highly-efficient removal of Pb(ii)

Carbon nanotubes/Al₂O₃ composite derived from catalytic reforming of the pyrolysis volatiles of the mixture of polyethylene and lignin for highly-efficient removal of Pb(ii)