An effective and recyclable adsorbent for the removal of heavy metal ions from aqueous system: Magnetic chitosan/cellulose microspheres

Luo, Xiaogang; Zeng, Jian; Liu, Shilin; Zhang, Lina

doi:10.1016/j.biortech.2015.07.044

Cited by 217 publications

(61 citation statements)

References 18 publications

(10 reference statements)

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“…Compounds containing chromium, nickel, copper, and other metal ions have been used in a variety of industrial processes, such as electroplating and leather tanning. Furthermore, these biopolymer–metal complexes have found extensive applications in various fields of human interest, such as waste treatment , biomedical applications , and catalysts . One of the well‐known applications of starch is based on its ability to strongly coordinate to metal ions (similar to the examples cited above).…”

Section: Introductionmentioning

confidence: 99%

Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution

2016

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The complexation ability of amylopectin (starch polymer) treated with ultrasound in DMSO/ H 2 O solution was investigated with respect to several metal ions, with the assistance of a factorial design (experimental planning), in order to establish and optimize the best complexation conditions. Acetate, chloride, and nitrate were counter-ions in the metal salts. The effects of temperature, time, and salt amount were evaluated during the complexation reactions using multivariate analysis, a set of mathematic methods capable of evaluating all system variables at once and, through this, temperature was found to be the most influential variable. Results for pH and conductivity provided evidence of complex formation between amylopectin and metal ions. In addition, small shifts in the vibrational frequency between the pure biopolymer and its metal complexes were detected using principal component analysis by interval (i-PCA, a multivariate analysis method), supporting the formation of complexes. The complexes formed with Cu II and Cr III ions presented the best complexation yield (40.0 and 55.4%, respectively) with the biopolymer.

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Section: Introductionmentioning

confidence: 99%

Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution

2016

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“…The dimensionless constant separation factor (R L ) could be used to judge whether the adsorption process was favorable for the Model L. The R L calculating equation was as follows (Equation (6)) [25]: The value of R L was calculated to range from 0.001 to 0.022 (Table S3). As listed above, proving porous structure contributed to adsorption because the R L was not only in the range of 0-1 but also much less than 1.…”

Section: Adsorption Isothermmentioning

confidence: 99%

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confidence: 99%

Adsorption and Desorption Performance and Mechanism of Tetracycline Hydrochloride by Activated Carbon-Based Adsorbents Derived from Sugar Cane Bagasse Activated with ZnCl2

Cai

Tian

et al. 2019

Molecules

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Adsorption and desorption behaviors of tetracycline hydrochloride by activated carbon-based adsorbents derived from sugar cane bagasse modified with ZnCl 2 were investigated. The activated carbon was tested by SEM, EDX, BET, XRD, FTIR, and XPS. This activated carbon exhibited a high BET surface area of 831 m 2 g −1 with the average pore diameter and pore volume reaching 2.52 nm and 0.45 m 3 g −1 , respectively. The batch experimental results can be described by Freundlich equation, pseudo-second-order kinetics, and the intraparticle diffusion model, while the maximum adsorption capacity reached 239.6 mg g −1 under 318 K. The effects of flow rate, bed height, initial concentration, and temperature were studied in fixed bed adsorption experiments, and adsorption data were fitted with six dynamic adsorption models. The results of characterizations and the batch experiments were analyzed to study the adsorption and desorption mechanisms. Tetracycline hydrochloride and activated carbon were bonded together by π-π interactions and cation-π bonds. Ethanol was used as an eluent which bonded with 10 hydrogen bond acceptors on tetracycline hydrochloride to form a complex by hydrogen bonding to achieve recycling.Molecules 2019, 24, 4534 2 of 17 has numerous -OH groups, some of which remain in the pyrolysis, while other parts forms new chemically-reactive oxygen functional groups [6]. AC contains not only a benzene ring but also many chemically reactive oxygen functional groups (-OH, -COOH, etc.), which can be used for chemical modification [7]. The -NH 2 group in the TCH can form a π-π interaction and a cation-π bond with the benzene ring on the ZnCl 2 activated bagasse-based activated carbon (ZBAC). During the pyrolysis process, cellulose and hemicellulose in bagasse (about 50 wt% cellulose and 25 wt% hemicellulose) are decomposed at 202 • C to produce levoglucosan (LGA) and anhydrosugar polymers. The isomerization reaction occurs after LGA dehydration which forms other anhydrosugars and furans [8]. The pyrolysis product is polymerized to form activated carbon at 600 • C. The activated carbon produced by direct the pyrolysis of bagasse has a small specific surface area (S BET was about 376.08 m 2 g −1 ), and ZnCl 2 helps to form more porous structures during pyrolysis (S BET was about 831.23 m 2 g −1 ) because ZnCl 2 catalyzes the Scholl condensation reaction during pyrolysis. The above-mentioned macromolecular polycyclic compounds in bagasse form porous structures during pyrolysis at high temperatures [9].However, how activated carbon's effect on the fate of tetracycline hydrochloride (TCH) in water has become a question demanding a quick solution, and few reports have paid attention to the adsorption and desorption behavior and mechanism. Desorption behavior influences not only the fate of TCH in the environment, which is still a primary concern, but also the efficient recycling of the adsorbent [10]. The structure-activity relationship of adsorbents plays a significant component in the adsorption and desorption process....

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“…There are many ways to treat wastewater containing mercury, such as chemical precipitation, evaporation, and adsorption. Among them, adsorption treatment is considered as one of the most promising techniques for mercury removal due to its simplicity, high efficiency, and operation convenience (Asl, Javadian, & Khavarpour, ; Li, Li, & Liu, ; Luo, Zeng, Liu, & Zhang, ). Various adsorbents have been investigated for mercury removal and reviewed so far (Manohar, Anoop Krishnan, & Anirudhan, ).…”

Section: Introductionmentioning

confidence: 99%

Preparation and application of bagasse‐based adsorbent for highly efficient removal of mercury ions

Ma¹,

Zeng

et al. 2019

Water Environment Research

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A high-performance bagasse-based adsorbent was prepared from agricultural waste bagasse by grafting of acrylamide and aminating with diethylenetriamine. Effects of catalyst dosage, acrylamide concentration, reaction temperature, and bath ratio on the grafting yield were investigated. The adsorption performances for mercury ions were evaluated by batch adsorption experiments and kinetic experiments. The results show that the adsorbent has high adsorption capacity for mercury in a wide range of pH values. The adsorption capacity could be as high as 813.0 mg/g, and the removal percentage for mercury ions can reach 99.9%. The kinetic adsorption experiments show it can achieve adsorption equilibrium rapidly, which implies that the adsorbent has a strong ability to capture mercury ions. Besides, the bagasse-based adsorbent showed promising regeneration performance, and its adsorption amount of regenerated adsorbent only slightly decreased after five recycling. © 2019 Water Environment Federation • Practitioner points • An amino-rich adsorbent was prepared from bagasse. • The adsorbent possesses high adsorption capacity and high removal efficiency for mercury. • The aminated bagasse adsorbs mercury rapidly. • The adsorbent functionalized with amino possesses strong affinity toward mercury.

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An effective and recyclable adsorbent for the removal of heavy metal ions from aqueous system: Magnetic chitosan/cellulose microspheres

Cited by 217 publications

References 18 publications

Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution

Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution

Adsorption and Desorption Performance and Mechanism of Tetracycline Hydrochloride by Activated Carbon-Based Adsorbents Derived from Sugar Cane Bagasse Activated with ZnCl2

Preparation and application of bagasse‐based adsorbent for highly efficient removal of mercury ions

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An effective and recyclable adsorbent for the removal of heavy metal ions from aqueous system: Magnetic chitosan/cellulose microspheres

Cited by 217 publications

References 18 publications

Study of complexes formation between transition metal ions and amylopectin in DMSO/H2O solution

Study of complexes formation between transition metal ions and amylopectin in DMSO/H2O solution

Adsorption and Desorption Performance and Mechanism of Tetracycline Hydrochloride by Activated Carbon-Based Adsorbents Derived from Sugar Cane Bagasse Activated with ZnCl2

Preparation and application of bagasse‐based adsorbent for highly efficient removal of mercury ions

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Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution

Study of complexes formation between transition metal ions and amylopectin in DMSO/H₂O solution