Rapid Adsorption of Copper(II) and Lead(II) by Rice Straw/Fe3O4 Nanocomposite: Optimization, Equilibrium Isotherms, and Adsorption Kinetics Study

Khandanlou, Roshanak; Ahmad, Mansor Bin; Masoumi, Hamid Reza Fard; Shameli, Kamyar; Basri, Mahiran; Kalantari, Katayoon

doi:10.1371/journal.pone.0120264

Cited by 55 publications

(30 citation statements)

References 39 publications

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“…It was considered that the increase of the ions concentration could restrict the number of adsorption sites in the CT and CTH hydrogel composites. So, at lower initial concentrations of the metal ions, sufficient adsorption sites were remained for the sorption of heavy metal ions, while increasing metal ion concentration provided decreased percentage. It indicated a decrease in the percentage for the removal of each ion.…”

Section: Resultsmentioning

confidence: 99%

“…The bigger the ionic radius, the stronger the adsorption of the ion was since the hydration capacity of that ion is smaller, resulting in weaker binding of the ion and water phase. Also, the preference adsorption exhibited for Pb(II) over Cd(II) and Cu(II) ion may due to the difference hydrated energy as was found in the order of −1481, −1807, and −2100 kJ/mol for Pb(II), Cd(II), and Cu(II), respectively …”

Section: Resultsmentioning

confidence: 99%

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Chitin‐halloysite nanoclay hydrogel composite adsorbent to aqueous heavy metal ions

Nguyen

Trang

Kobayashi

2018

J of Applied Polymer Sci

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Halloysite nanoclay (HNC) was mixed with Chitin hydrogel film by phase inversion in water vapor atmosphere at room temperature. In the preparation, Chitin was dissolved in N,N‐dimethyl acetamine/lithium chloride (DMAc/LiCl) and different amounts of HCN was dispersed well for the gelation process. The resultant Chitin‐Halloysite nanoclay (CTH) hydrogel films containing HCN at 0, 0.1, 0.5, 1, and 4 wt % were used for the adsorbents of heavy metal ions. As the results, the tensile strength of the hydrogel composite was enhanced from 0.34 to 0.71 N/mm2 while the elongation decreased from 66.43% to 49.93% with the increment of HNC concentration from 0 to 4 wt %. A reduction in the water content and the increment in the modulus confirmed the formation of highly dispersed nano‐composites with improved interfacial interactions between nano‐fillers and matrix. In the adsorption experiments of the ternary ion of Pb2+, Cu2+, and Cd2+, the removal capacity of Pb(II) was highly retained by the CTH hydrogel film relative to Cd(II) and Cu(II), shown Langmuir model with the maximum binding amount on the hydrogel composites were followed as order Pb (8.2 mg/g), Cu (4.2 mg/g), and Cd (2.1 mg/g). © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47207.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Chitin‐halloysite nanoclay hydrogel composite adsorbent to aqueous heavy metal ions

Nguyen

Trang

Kobayashi

2018

J of Applied Polymer Sci

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“…Through recent years, heavy metal ion, such as copper, present in the environment, particularly in water resources, was becoming as one of the major concerns because of their toxicity, tendency to accumulate in living organisms, wide spread presence and nonbiodegradability [2], [3]. Heavy metals as distinguished as carcinogens that are effective towards humans by the International Agency for Research in Cancer and the U.S. Environmental Protection Agency can easily enter the food chain in so many ways that can cause harmful effects over their life span with gradual accumulation in living organisms [4]. In particular, lead pollution can cause anemia, chronic headaches, diarrhea, cancer, mental retardation, kidney diseases and can damage the nervous system and reproductive.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the excess amount of copper intake will result to growth in the liver and will create gastro-intestinal [5]. Therefore, before disposing the heavy metals in aquatic environments, it is necessary to remove it first [4].…”

Section: Introductionmentioning

confidence: 99%

The removal of copper (II) and lead (II) from aqueous solution using Fuller’s earth and Fuller’s earth-immobilized nanoscale zero valent iron (FE-NZVI) by adsorption

et al. 2019

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The present study investigates the propensity of Fuller's Earth, a diatomaceous earth that is cheap and abundant in several locations whose application is yet to be fully ventured, and Fuller's Earth-Immobilized Nanoscale Zero Valent Iron in removing heavy metal contaminants, particularly Pb 2+ and Cu 2+ , from aqueous solutions through adsorption method. FE-nZVI were synthesized through the borohydride reduction method and subsequently characterized through SEM, FTIR, and XRD. The SEM analysis shows an increase in the agglomeration of the nZVI on the immobilized Fullers' Earth with an increase in the loading of Fe0. Tests were conducted on various samples in order to determine the effect of three parameters on the efficiency of the adsorbent which includes the initial concentration of the heavy metal, adsorbent dosage and pH with respect to time. The results show that the FE-nZVI can be used as a new adsorbent for the sole application of heavy metal remediation in aqueous systems due to its efficiency in removing the contaminants that would allow individuals to conform to the stringent requirements dictated by environmental laws.

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“…Secondly, appropriate equations, methods and theories are used to generate adsorption isotherms that are then matched with the experimental data, to provide a mathematical representation of the adsorption results. Once acceptable isotherms derived from a theory or an empirical correlation [3,[11][12][13] for both pure and binary gas systems are obtained, and parametrised the adsorbed gas mole profiles with corresponding pressure are used in a simulator to predict a long term gas concentration profile.…”

Section: Research Objectivesmentioning

confidence: 99%

Predicting long term coal seam gas concentrations from multi-component sorption

Shwe¹

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During a last decade also, the coal seam gas (CSG) industry in Australia, particular in Queensland has grown rapidly due to large export-oriented LNG projects. Consequently, many CSG fields were developed to meet the necessary gas demand for these LNG plants as well as to supply domestic need. A key requirement in gas supply from the CSG reservoirs, important for conditioning the feed and operating conditions of the LNG plants is the correct forecasting of the gas quality variation with time. In particular, CO2 concentration in the produced gas is likely to trend upwards in the long term. The impact of this dictates the LNG plant gas preconditioning and may also raise environmental concerns. Because of these I acknowledge that an electronic copy of my thesis must be lodged with the University Library and, subject to the policy and procedures of The University of Queensland, the thesis be made available for research and study in accordance with the Copyright Act 1968 unless a period of embargo has been approved by the Dean of the Graduate School.

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Rapid Adsorption of Copper(II) and Lead(II) by Rice Straw/Fe3O4 Nanocomposite: Optimization, Equilibrium Isotherms, and Adsorption Kinetics Study

Cited by 55 publications

References 39 publications

Chitin‐halloysite nanoclay hydrogel composite adsorbent to aqueous heavy metal ions

Chitin‐halloysite nanoclay hydrogel composite adsorbent to aqueous heavy metal ions

The removal of copper (II) and lead (II) from aqueous solution using Fuller’s earth and Fuller’s earth-immobilized nanoscale zero valent iron (FE-NZVI) by adsorption

Predicting long term coal seam gas concentrations from multi-component sorption

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