Removal of mercuric ions by systems based on cellulose derivatives

Tashiro, Tatsuo; Shimura, Yukio

doi:10.1002/app.1982.070270235

Cited by 71 publications

(42 citation statements)

References 13 publications

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“…A later study demonstrated that thiodeoxycelluloses and hydrazinodeoxycelluloses could also remove more than 99% of mercuric ion [75]. Crosslinked diaminodeoxycelluloses were also observed to adsorb and desorb other heavy metal ions such as Cu 2 , Mn 2 , Co 2 and Ni 2 [76].…”

Section: Chemicalmentioning

confidence: 95%

Deoxycelluloses and related structures

Vigo¹,

Sachinvala²

1999

Polym. Adv. Technol.

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The syntheses of various deoxycelluloses and related structures (cellulosenes and anhydrocelluloses) from the mid‐1920s to the present are critically reviewed. General synthetic strategies to prepare deoxycelluloses include nucleophilic displacement of good leaving groups. Distinctions are made between reaction of cellulosics under homogeneous and heterogeneous conditions. Recent advances in the preparation of halodeoxycelluloses have led to high degree of substitution fluorodeoxycelluloses and bromodeoxycelluloses. Applications for the deoxycelluloses are numerous and characterized by biological, chemical or physical end uses.

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Section: Chemicalmentioning

confidence: 95%

Deoxycelluloses and related structures

Vigo¹,

Sachinvala²

1999

Polym. Adv. Technol.

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“…The modification process involved treating a solid sample of the dried mushroom (10.0 g) previously ground material with 0.1 M sodium hydroxide [61][62][63][64]. The resulting mixture was refluxed at a temperature of 80°C for three hours.…”

Section: Modification Of Both Edible and Toxic Mushroommentioning

confidence: 99%

“…The treated biomaterial was then washed with 100 ml of distilled water to bring the pH to neutral with dilute nitric acid. The solution was filtered through a sintered glass crucible and dried in a vacuum [64]. The resultant solid was dried in an oven at temperature of 80°C for two hours and then extent of modification was confirmed with FTIR and the product used for sorption experiments.…”

Section: Modification Of Both Edible and Toxic Mushroommentioning

confidence: 99%

Remediation of Some Selected Heavy Metals from Water Using Modified and Unmodified Mushrooms

Bii¹,

Mwangi²,

Wanjau³

et al. 2016

J Pollut Eff Cont

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The dispersal of toxic heavy metals by water from natural and anthropogenic is a worldwide environmental concern due to pollution. Despite some metals playing an important role in body, they are toxic when the level exceeds the tolerance limits while others such as lead have no known physiological value to human beings. Since heavy metals cannot be degraded, then their removal from drinking water is necessary. Mushrooms are readily available in Bomet County and their metal removal ability was investigated. The study aimed at removing heavy metals from water by adsorption using mushroom, as a cost-effective and sustainable method. The raw mushroom was modified with sodium hydroxide and characterization of both the parent material and its modified form was done using Fourier Transform Infrared spectrometry (FTIR). Sorption experiments were carried out using the batch adsorption method and sorption parameters including pH, contact time, adsorbent dose and initial metal ion concentration investigated. The results found out that the sorption capacity for cadmium ions ranged from 1.826-25.285 mg/g by the unmodified edible mushroom (UEM), the modified edible mushroom (EM), unmodified toxic mushroom (UTM) and modified toxic mushroom (TM). For copper ions, sorption capacity ranged from 0.002-4.097 mg/g, while that of the lead ions ranged from 1.345-2.593 mg/g by the UEM, EM, UTM and TM respectively. The sorption capacity showed improvement on modification as sorption of cadmium increased from 1.826-25.285 mg/g by the UEM, EM, UTM and TM. At a pH range of 4-6, the sorbent material was found to remove up to 90% of the metals. The sorbent material had a removal efficiency of 95% of the metals in less than 20 minutes. The UEM and UTM fitted well in Langmuir adsorption isotherm model for cadmium and lead ions. For copper ions, UEM, EM, UTM and TM fitted in the Freundlich model. TM for lead ions best fitted in the Freundlich model. The bio-sorption kinetics was determined by fitting first-order-Lagergreg and Pseudo-second-order kinetics models to the experimental data. It was found that the data for lead was better described by the pseudo-second-order model. For copper ion, the data was best described by Ho's pseudo second order for UEM and UTM, cadmium ions for all sorbents was best described by Lagergreg's first-order kinetics. The FTIR analysis suggested the possibility of the participation of carboxyl groups in metal uptake. The levels of dissolved organic carbon (DOC) were found to be 19.0 mg/L in the raw material and 2.19 mg/L after modification. It was confirmed that modification minimized secondary pollution. This indicated that mushrooms have a potential application for the remediation of metal polluted waters.

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“…Then, the effectiveness of such reaction routes has been explored by using different chemicals as precursors, with the objective of transferring this element to the cellulosic polymeric chain. A series of other reactants are available for such process, but thionyl chloride is the most effective and, consequently, is the most used 10 , followed by phosphoryl oxychloride 11 , N-chlorosuccinimide 12 and tosyl chloride 13 . The next step of the chemical modification occurs by nucleophilic attack, which is provided by organic molecules embracing basic centers to act as chelating agents in the corresponding structure, such as nitrogen, sulfur, oxygen and/or phosphorous atoms.…”

Section: Introductionmentioning

confidence: 99%

Surface cellulose modification with 2-aminomethylpyridine for copper, cobalt, nickel and zinc removal from aqueous solution

et al. 2012

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Cellulose was first modified with thionyl chloride, followed by reaction with 2-aminomethylpyridine to yield 6-(2'-aminomethylpyridine)-6-deoxycellulose. The resulting chemically-immobilized surface was characterized by elemental analysis, FTIR, 13 C NMR and thermogravimetry. From 0.28% of nitrogen incorporated in the polysaccharide backbone, the amount of 0.10 ± 0.01 mmol of the proposed molecule was anchored per gram of the chemically modified cellulose. The available basic nitrogen centers attached to the covalent pendant chain bonded to the biopolymer skeleton were investigated for copper, cobalt, nickel and zinc adsorption from aqueous solution at room temperature. The newly synthesized biopolymer gave maximum sorption capacities of 0.100 ± 0.012, 0.093 ± 0.021, 0.074 ± 0.011 and 0.071 ± 0.019 mmol.g -1 for copper, cobalt, nickel and zinc cations, respectively, using the batchwise method, whose data was fitted to different sorption models, the best fit being obtained with the Langmuir model. The results suggested the use of this anchored biopolymer for cation removal from the environment.

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Removal of mercuric ions by systems based on cellulose derivatives

Cited by 71 publications

References 13 publications

Deoxycelluloses and related structures

Deoxycelluloses and related structures

Remediation of Some Selected Heavy Metals from Water Using Modified and Unmodified Mushrooms

Surface cellulose modification with 2-aminomethylpyridine for copper, cobalt, nickel and zinc removal from aqueous solution

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