Synthesis and characterization of poly(hydroxamic acid) chelating resin from poly(methyl acrylate)-grafted sago starch

Lutfor, M. R.; Sidik, S.; Yunus, Wan Md Zin Wan; Rahman, Mohamad Zaki Ab.; Monshi, Ahmad; Haron, Md. Jelas

doi:10.1002/1097-4628(20010214)79:7<1256::aid-app130>3.0.co;2-g

Cited by 53 publications

(39 citation statements)

References 17 publications

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“…The trend in the curve showed that the adsorption of the metal ions increased with increasing pH. Thus, the synthesized Khaya cellulosebased poly(amidoxime) ligand functioned as an adsorbent, forming complexes with the metal ions that prompted their subsequent removal from wastewater (Lutfor et al 2001;Yong et al 2012;Awual et al 2013;Lutfor et al 2014).…”

Section: Effect Of Ph On the Removal Of Various Transition Metal Ionsmentioning

confidence: 98%

“…The pH was adjusted to 11 by the addition of NaOH. Thus, the prepared hydroxylamine solution was added to the flask containing poly(acrylonitrile)-grafted Khaya cellulose (9.0 g), and the reaction was maintained at 70 °C for 6 h (Lutfor et al 2001;Yong et al 2012). After the reaction was run to completion, the mixture was filtered to separate out the chelated polymeric ligand and washed with methanol/water (4:1) solution.…”

Section: Synthesis Of Poly(amidoxime) Ligandmentioning

confidence: 99%

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Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Rahman¹,

Sarkar²,

Yusoff³

et al. 2016

BioResources

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A free radical chain initiation reaction was exploited to prepare poly(acrylonitrile)-grafted Khaya cellulose. The synthesis of the poly(amidoxime) ligand was also performed using oximation reactions. Transition metal cations formed some complexes with the polymeric ligand. The pH of the solution played an important role in the optical detection of Cu 2+ ions. The highest absorbance (approximately 94%) of the [Cu-ligand] n+ complex was at pH 6. The sorption quantity increased with increasing Cu 2+ ion concentration, which was reflected by a broad peak at 600 nm that was attributed to the charge transfer (- transition) process. The equilibrium sorption capacity of 282 mg/g, with faster adsorption rates (t1/2 = 8 min), suggested that copper possessed excellent adsorption capacity compared with the other cations (Fe 3+ , Co 3+ , Cr 3+ , Ni 2+ , and Zn 2+ ). The sorption data for all of the cations followed the Freundlich isotherm model, with a high coefficient of determination, reflecting a heterogeneous sorption process by the cellulose-based, poly(amidoxime) adsorbent. The feasibility for recycling of adsorbent was evaluated by the sorption/ desorption study, and the results suggest that a new type adsorbent can be reused in seven cycles without any significant loss in its original sensing and removal performances.

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Section: Effect Of Ph On the Removal Of Various Transition Metal Ionsmentioning

confidence: 98%

Section: Synthesis Of Poly(amidoxime) Ligandmentioning

confidence: 99%

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Rahman¹,

Sarkar²,

Yusoff³

et al. 2016

BioResources

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“…Hydroxamic acid contains the bidentate groups, which meets all the requirements necessary for the formation of metal complexes. Complexes are usually formed via the substitution of a hydrogen atom of hydroxylamine by a metal cation and ring closure via the carbonyl oxygen atom [15]. The hydroxamate anion is serving as a bidentate ligand which forms a complex with metal ion bound by both the oxygen by chelation [16].…”

Section: Chelating Mechanism Of Hydroxamic Acid and Amidoxime Ligandsmentioning

confidence: 99%

Efficient removal of heavy metals from electroplating wastewater using polymer ligands

Rahman

Sarkar

Yusoff

2015

Front. Environ. Sci. Eng.

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Poly(hydroxamic acid)-poly(amidoxime) chelating ligands were synthesized from poly(methyl acrylate-co-acrylonitrile) grafted acacia cellulose for removing toxic metal ions from industrial wastewaters. These ligands showed higher adsorption capacity to copper (2.80 mmol•g -1 ) at pH 6. In addition, sorption capacities to other metal ions such as iron, zinc, chromium, and nickel were also found high at pH 6. The metal ions sorption rate (t 1/2 ) was very fast. The rate of adsorption of copper, iron, zinc, chromium, nickel, cobalt, cadmium and lead were 4, 5, 7, 5, 5, 8, 9 and 11 min, respectively. Therefore, these ligands have an advantage to the metal ions removal using the column technique. We have successfully investigated the known concentration of metal ions using various parameters, which is essential for designing a fixed bed column with ligands. The wastewater from electroplating plants used in this study, having chromium, zinc, nickel, copper and iron, etc. For chromium wastewater, ICP analysis showed that the Cr removal was 99.8% and other metal ions such as Cu, Ni, Fe, Zn, Cd, Pb, Co and Mn removal were 94.7%, 99.2%, 99.9%, 99.9%, 99.5%, 99.9%, 95.6% and 97.6%, respectively. In case of cyanide wastewater, the metal removal, especially Ni and Zn removal were 96.5 and 95.2% at higher initial concentration. For acid/alkali wastewater, metal ions removing for Cd, Cr and Fe were 99.2%, 99.5% and 99.9%, respectively. Overall, these ligands are useful for metal removal by column method from industrial wastewater especially plating wastewater.

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“…The increase in temperature led to an increase in decomposition rate of H 2 O 2 /Fe 2+ . This produced more hydroxyl radicals, which then reacted with the lignocellulosic backbone to produce more radicals on it [28]. In addition, the reactivity of the monomer was also increased, thus producing more grafted product.…”

Section: Effect Of Reaction Temperaturementioning

confidence: 99%

Effect of reaction conditions on the thermal stability of polystyrene grafted oil palm empty fruit bunch (OPEFB) fiber

Jamarosliza¹,

Hasan

Hassan³

et al. 2014

Journal of Polymer Engineering

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Polystyrene was grafted onto oil palm empty fruit bunch (OPEFB) fiber in aqueous medium by using the H 2 O 2 /Fe 2+ system as an initiator. Optimization of the reaction conditions was carried out by varying the reaction period, temperature, amounts of the monomer, initiator and co-catalyst. The presence of the peaks around 3026 cm -1 , 698 cm -1 and 755 cm -1 in the Fourier transform infrared (FTIR) spectra of the grafted product and the presence of polystyrene on the surface of grafted OPEFB in the scanning electron micrograph provided strong evidence of the grafting. The maximum percentage of grafting (about 200%) was achieved when the reaction was carried on for 4 h at a temperature of 65°C, using 52.27 mmol monomer, 6.00 mmol initiator and 0.26 mmol co-catalyst. The thermal stability of the grafted OPEFB was found to be better than that of the ungrafted fiber, as seen from thermogravimetric analysis (TGA).

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Synthesis and characterization of poly(hydroxamic acid) chelating resin from poly(methyl acrylate)-grafted sago starch

Cited by 53 publications

References 17 publications

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Efficient removal of heavy metals from electroplating wastewater using polymer ligands

Effect of reaction conditions on the thermal stability of polystyrene grafted oil palm empty fruit bunch (OPEFB) fiber

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