Chemically modified kapok fiber for fast adsorption of Pb2+, Cd2+, Cu2+ from aqueous solution

Duan, Chunting; Zhao, Ning; Yu, Xiao‐Lan; Zhang, Xiaoyan; Xu, Jian

doi:10.1007/s10570-013-9875-9

Cited by 91 publications

(45 citation statements)

References 53 publications

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“…2.47 g of NH 2 OH HCl was dissolved into 60 mL of a mixed solution of methanol/water (4 : 1). 1.42 g of NaOH was added to neutralize the HCl and the precipitated NaCl was removed by ltration.…”

Section: Synthesis Of Paha-cellulosementioning

confidence: 99%

“…To eliminate heavy metal ions from aquatic streams, numerous physicochemical and biological techniques including chemical oxidation and reduction, adsorption, ion exchange, reverse osmosis, membrane separation and electrochemical treatments have been extensively applied. [1][2][3][4][5] Among these techniques, adsorption is recognized as the most effective method due to its high selectivity, easy manipulation and environmental issues.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

et al. 2017

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Amidoxime and hydroxamic acid functional groups have comparable chelating ability with synthetic resins, but the synthesis of cellulose fibers bearing amidoxime and hydroxamic acid functional groups using simple and effective strategies have yet to be developed. In this study, a poly(amidoxime-hydroxamic acid) cellulose derivative (pAHA-cellulose) was prepared via free radical polymerization followed by an oximation reaction. A series of microscopic analyses and spectral tests proved that the pAHA-cellulose was covered with uniform amidoxime and hydroxamic acid functional groups. The use of pAHAcellulose towards heavy metal ion removal was investigated and an uptake equilibrium was achieved within 60 min for Cu 2+ and Zn 2+ , and 120 min for Pb 2+ and Cr 3+, through a chelation mechanism. The adsorption behavior followed the pseudo-second-order kinetic model and Langmuir isotherm with and Zn 2+ , respectively. Regeneration of pAHA-cellulose did not significantly influence the adsorption towards metal ions for up to five sequential cycles. Considering the simple and efficient grafting process, excellent adsorbability and prominent renewability, pAHA-cellulose is believed to be a new and feasible candidate for heavy metal ion removal from aqueous solution.

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Section: Synthesis Of Paha-cellulosementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

et al. 2017

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“…In order to have pollution-free environment, the heavy metals should be removed from the waste water before its disposal. Various methods have been developed to eliminate Pb 2+ and Zn 2+ content in water, including ion exchange [3], reverse osmosis [4] and adsorption [5,6,7,8]. Among of these, adsorption process is one of the effective techniques that has been successfully employed for heavy metals removal from wastewater due to its simplicity of design, easy to operate and can work at low concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…Among of these, adsorption process is one of the effective techniques that has been successfully employed for heavy metals removal from wastewater due to its simplicity of design, easy to operate and can work at low concentrations. Activated carbon [9], polymeric material [10,6] and graphene [5] have been utilized as adsorbents. However, most of these materials are expensive although can be regenerated.…”

Section: Introductionmentioning

confidence: 99%

Competitive adsorption of Pb2+ and Zn2+ ions from aqueous solutions by modified coal fly ash

Astuti¹,

Martiani²,

Khair³

2017

AIP Conference Proceedings

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Abstract. Coal fly ash (CFA), which is a solid waste generated in large amounts worldwide, is mainly composed of some oxides having high crystallinity, including quartz (SiO2) and mullite (3Al2O3 2SiO2), and unburned carbon as a mesopore material that enables it to act as a dual site adsorbent. To decrease the crystallinity, CFA was modified by sodium hydroxide treatment. The modified fly ash (MFA) contains lower amount of Si and Al and has a higher specific surface area than the untreated fly ash (CFA).

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“…Bagasse, an abundant agricultural lignocellulosic byproduct, is a fibrous residue of cane stalks obtained after the crushing and extraction of the juice from sugarcane. Recently, bio-products derived from bagasse have been widely applied in many industrial fields, such as coating, food-packing, and painting (Duan et al 2013), paving the way to replace the fossil-based products.…”

Section: Introductionmentioning

confidence: 99%

Homogeneous Esterification Mechanism of Bagasse Modified with Phthalic Anhydride in Ionic Liquid, Part 3: Structural Transformation of Lignins

et al. 2017

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The phthalation of bagasse was investigated comparatively with the three main isolated components in 1-allyl-3-methylidazium chloride (AmimCl) to reveal the reaction behavior of bagasse. In the first two parts, the detailed changes of cellulosic and hemicellulosic components in bagasse were elucidated during phthalation. In Part 3, the phthalation of lignins was performed in AmimCl with various ratios of phthalic anhydride/lignins from 10 to 50 mmol/g. The phthalation degree ranged from 41.1% to 68.8% for the phthalated lignins. The aliphatic hydroxyls of lignins were more easily phthalated than the phenolic hydroxyls as revealed by 31 P nuclear magnetic resonance (NMR) analysis. Fourier transform infrared spectroscopy (FT-IR) and two dimensional (2D) heteronuclear single quantum correlation (HSQC) confirmed the attachment of phthaloyl group onto lignins. Severe degradation of lignin macromolecules was found at high ratios of phthalic anhydride/lignins (30 to 50 mmol/g) by gel permeation chromatography (GPC) analysis. These results provide a detailed understanding of reaction behaviors of lignins during bagasse phthalation, which are beneficial to prepare composites based on phthalated lignocellulose with better properties.

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Chemically modified kapok fiber for fast adsorption of Pb2+, Cd2+, Cu2+ from aqueous solution

Cited by 91 publications

References 53 publications

Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

Competitive adsorption of Pb2+ and Zn2+ ions from aqueous solutions by modified coal fly ash

Homogeneous Esterification Mechanism of Bagasse Modified with Phthalic Anhydride in Ionic Liquid, Part 3: Structural Transformation of Lignins

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