Potassium fulvate-functionalized graft copolymer of polyacrylic acid from cellulose as a promising selective chelating sorbent

Essawy, Hisham; Mohamed, Mohamed Mokhtar; Ammar, Nabila S.; Ibrahim, Hanan S.

doi:10.1039/c7ra02646c

Cited by 13 publications

(11 citation statements)

References 28 publications

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“…The humic acid precipitate at 40 ͦ Cobtain concentrated and having a pH 2 adjusted to a pH of 6 for the application (Munawar and Wanti, 2016). Humic acid extracted (at pH 4) contained 46.2% total organic carbon, 4.33% N, 0.41% K and 0.38% P. Fulvic acid extracted (at pH 4) contained 45.7% total organic carbon, 3.54% N, 0.29% K and 0.25% P. Potassium fulvate (KF, 9.15% K 2 O) and potassium humate (KH, 10.2% K 2 O) solutions were prepared by re-dissolving fulvic and/or humicacid in KOH solution (8% K 2 O) and purified by passage through activated charcoal and transferred to a membrane filter (Essawy et al, 2017).…”

Section: Extraction Of Fulvate and Humate Solutions From The Compostmentioning

confidence: 99%

Studying the Effect of Magnetized Fulvate and Humate Solutions on Phosphorus Availability in Sandy Soil Cultivated by Faba Bean (Vicia Faba L.)

Mohamed

2020

Egypt.J. Soil Sci.

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T WO FIELD experiments were carried out in sandy soil at the Ismailia Agricultural Research Station during winter seasons of 2017/2018-2018/2019. The aim is to study the effect of magnetized aqueous solutions (0.5% v/v) of potassium fulvate (KF) and/or potassium humate (KH) sprayed in presence of soil applied rock phosphate (RP) and/or super phosphate (SP) fertilizers (16.09 Kg P ha-1 application rate) on faba been (Vicia faba L.) plant. Spraying of solutions was applied four times 30, 50, 70 and 90 days after sowing. Control treatments (0 additions), magnetized (KFM and/or KHM) and non-magnetized (mixed with tab water, KFT and/or KHT) treatments were distributed in a complete randomized block design. Cultivation was performed as recommended by the Ministry of Agriculture. At maturity stage and after harvest, yield (Mg ha-1) and some yield components, percentage (%) of N, P, and K available in soil and total in plant, pH and EC were estimated. Results showedthe magnetic treatments KFM and KHM resulted in the most significant increase of the available P (mg kg-1) in soil for RP and SP treatments and the available N for RP. The increase in the available K in soil was non-significant. Magnetic solutions of KFM and KHM also exhibited a significant increase in the seed weight and dry weight of pods (g plant-1) but the increase in the yield of seeds and straw (Mg ha-1) was non-significant. Foliar application of magnetic fulvate and humate solutions may enhance the efficiency of phosphorus fertilization under sandy soil conditions.

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Section: Extraction Of Fulvate and Humate Solutions From The Compostmentioning

confidence: 99%

Studying the Effect of Magnetized Fulvate and Humate Solutions on Phosphorus Availability in Sandy Soil Cultivated by Faba Bean (Vicia Faba L.)

Mohamed

2020

Egypt.J. Soil Sci.

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“…The proposed mechanism for synthesizing straw-biopolymer-based hydrogel is shown in Figure 2 . Firstly, the hydrogen atoms derived from the hydroxyl groups of lignin, hemicellulose, and cellulose were captured by the redox initiator system (NH 4 ) 2 S 2 O 8 –Na 2 SO 3 , consequently generating free radicals as active sites, and acrylic acid was grafted to the chains of lignin, hemicellulose, and cellulose, and this has been proved in previous studies [ 6 , 17 , 30 ]. After the N , N′ -methylenebisacrylamide was added, a three-dimensional network structure hydrogel was formed because the cross-linker could react with two active sites.…”

Section: Resultsmentioning

confidence: 94%

High-Performance Hydrogel Adsorbent Based on Cellulose, Hemicellulose, and Lignin for Copper(II) Ion Removal

et al. 2021

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Cellulose, hemicellulose, and lignin are three kinds of biopolymer in lignocellulosic biomass, and the utilization of the three biopolymers to synthesize hydrogel adsorbent could protect the environment and enhance the economic value of the biomass. A novel hydrogel adsorbent was prepared using cellulose, lignin, and hemicellulose of wheat straw by a one-pot method, and the adsorbent showed excellent adsorption performance for copper(II) ions. Scanning electron microscopy and Fourier transform infrared spectroscopy analysis showed that the prepared straw-biopolymer-based hydrogel had porous structure, and cellulose fibrils had crosslinked with lignin and hemicellulose by poly(acrylic acid) chains. The effects of contact time, initial concentration, and temperature on the copper(II) ion removal using the prepared hydrogels were investigated, and the obtained results indicated that the adsorption kinetics conformed to the pseudo-second-order and Elovich equation models and the adsorption isotherm was in accord with the Freundlich model. The adsorption thermodynamics study indicated that the adsorption process was spontaneous and accompanied by heat. X-ray photoelectron spectroscopy analysis revealed that the adsorption behavior resulted from ion exchange. The prepared hydrogel based on cellulose, hemicellulose, and lignin could be used for water treatment and soil remediation because of its high performances of excellent heavy metal ion removal and water retention.

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“…Among them, polyvinyl pyrrolidone (PVP) was added as capping agent during the course of coprecipitation of cobalt ferrite [21] . Essawy and co-workers [26][27][28] used fulvic acid in the preparation of polymeric superabsorbents to pass on reinforcement and functionalization to the resulting structures. This provoked elevation of the chemical activity especially the chelation potential [26] .…”

Section: Introductionmentioning

confidence: 99%

“…Essawy and co-workers [26][27][28] used fulvic acid in the preparation of polymeric superabsorbents to pass on reinforcement and functionalization to the resulting structures. This provoked elevation of the chemical activity especially the chelation potential [26] . The high functionality and elevated binding capacity of fulvic acid to metal ions allowed their role as templates through the synthesis of metal oxides starting from nitrate precursors via coprecipitation [7,8] .…”

Section: Introductionmentioning

confidence: 99%

“…This progresses via initial coprecipitation in the form of metal hydroxides in existence of fulvic acid and the desired oxides are finally obtainedby calcination at high temperatures. Grouping a number of precursors of metal ions in presence of fulvic acid would be expected to result in homogenous metal oxides exhibiting variation in their composition and characteristics [26][27][28] .…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Cobalt Ferrite Nanoparticles Using Fulvic Acid as A Capping Agent and Its Effect on Catalytic Activity

Li¹,

Badawy²,

Du³

et al. 2020

Res. Appl. Mater. Sci.

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Cobalt ferrite was prepared by co-precipitation from cobalt and iron soluble precursors in presence of fulvic acid at different pH values, namely, 6 and 8 and compared with the same preparation in absence of fulvic acid. The presence of fulvic acid is expected to bind metal ions through bridging before co-precipitation and mineralization. The extent of binding is determined according to the pH of the process. This influences the mineralization of the resulting cobalt ferrite and the crystallization/ordering of its lattice. In addition, the extent of residual ferric oxide is also a function of the efficiency of binding process. This route of modification for the co-precipitation process was found to be accompanied by enhanced surface area and total pore volume for most of the prepared samples. The involvement of these oxides as catalysts in the photo-catalytic degradation of phenol from wastewater was found to contribute very efficiently and the removal reached about 88% in some cases, which can be attributed to olation and oxolation process of the formed nanoparticles.

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Potassium fulvate-functionalized graft copolymer of polyacrylic acid from cellulose as a promising selective chelating sorbent

Abstract: (Cell-g-PAA)/KF is a promising selective chelating graft copolymer for heavy metal ions from aqueous solutions.

Cited by 13 publications

References 28 publications

Studying the Effect of Magnetized Fulvate and Humate Solutions on Phosphorus Availability in Sandy Soil Cultivated by Faba Bean (Vicia Faba L.)

Studying the Effect of Magnetized Fulvate and Humate Solutions on Phosphorus Availability in Sandy Soil Cultivated by Faba Bean (Vicia Faba L.)

High-Performance Hydrogel Adsorbent Based on Cellulose, Hemicellulose, and Lignin for Copper(II) Ion Removal

Preparation of Cobalt Ferrite Nanoparticles Using Fulvic Acid as A Capping Agent and Its Effect on Catalytic Activity

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