Heavy metal removal using hydroxypropyl cellulose and polyacrylamide gels, kinetical study

Zamarripa–Cerón, José Luis; García‐Cruz, Juan Carlos; Martínez–Arellano, Alfredo Carlos; Castro-Guerrero, Carlos Fernando; Martín, M.E. Angeles‐San; Morales‐Cepeda, Ana Beatriz

doi:10.1002/app.43285

Cited by 17 publications

(3 citation statements)

References 42 publications

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“…Hence, in order to improve the effectiveness of polyacrylamide hydrogel, many efforts have been made. 13,14 In this study, polyacrylamide hydrogel composites with different weight ratios (i.e., 1%, 3% and 5 %) of biochar were synthesized for the removal of Cd from aqueous solutions. The influence of biochar dosage was compared and discussed.…”

Section: Introductionmentioning

confidence: 99%

Using hydrogel-biochar composites for enhanced cadmium removal from aqueous media

Li¹,

Chen²

2018

MSEIJ

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Cadmium (Cd) is a common heavy metal and is often released into aquatic environment during mining activities and metallurgical processes. At high concentrations, Cd is highly toxic to most organisms and can be accumulated in organisms before entering human body through food chains. Many technologies have been developed to remediate Cd contamination, among which biochar is one of the most sustainable and promising. However, high pricing of biochar today is plaguing its large-scale applications. Therefore, in this study, inexpensive acrylamide was used to synthesize polyacrylamide hydrogel-biochar composites with the dosages of 1, 3 and 5% weight ratios of biochar. The swelling ratio significantly increased from 818% for untreated hydrogel to 1220, 1349 and 1506% for composites with increasing dosages of biochar, respectively. According to the isotherm experiment results, modeling simulations indicated that the maximum adsorption capacities (qmax) of the composites were 30.63, 59.21 and 63.58 mg/g for the three composites with increasing biochar dosages, respectively. In comparison, the untreated hydrogel had a much lower qmax of 24.72 mg/g. Besides the greater water swelling capacity, the significantly improved ability of hydrogel-biochar composites to entrap Cd from aqueous media was hypothetically attributed to the formation of ionic attraction fields around scattered biochar particles. It was recommended that 3% of biochar be the optimal dosage because further improvement became insignificant at higher dosages. The use of hydrogel-biochar composites for Cd contamination issues is a cost-effective approach.

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Section: Introductionmentioning

confidence: 99%

Using hydrogel-biochar composites for enhanced cadmium removal from aqueous media

Li¹,

Chen²

2018

MSEIJ

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“…A hydrogel made with hydroxypropyl cellulose (HPC) and polyacrylamide (PAAm) was utilized for the removal of Pb, Ni and Cu ions. The hydrogel successfully removed these metals, as shown by the results of atomic absorption spectroscopy where the polymer has removed 53% of Pb, 52% of Ni and 51% of Cu [15]. The aim of the present work is at the incorporation of Iraqi white Kaolin into polyamide to improve its mechanical properties such as tensile and impact strength, hardness and permeability and utilizing the produced composite for the removal of nickel by adsorption from water solution.…”

Section: Introductionmentioning

confidence: 90%

Preparation, Characterization and Utilization of Polyacrylamid-Kaolin Composite in the Removal of Nickel Ions From Water

Barbooti¹,

Hilal²,

Al-Dabbagh³

2018

ETJ

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A composite material of polymeric matrix Polyacrylamid (PAM) that is reinforced by a certified clay mineral of the Iraqi kaolinite at several weight ratios (10, 20, 30, 40 and 50%) was prepared by mixing the polymer water solution with the clay followed by hand molding method. Some of the mechanical properties of the prepared composite such as tensile strength, impact and hardness Shore A were studied to improve the mechanical capability to be as a sorbent for the removal of heavy metals from water.The results showed an improvement in the mechanical properties as the kaolin content was increased. The powdered material was evaluated as a sorbent for nickel ions from aqueous solution using batch conditions. Experimental design (Box-Wilson) system was applied to determine the optimum working conditions such as composite amount, pH and contact time. Results proved reasonable adsorption efficiency and relatively high adsorption capacity of the composite towards the Ni ions removal of from water. The optimum conditions were sorbent amount of 10.0 g/l, pH = 7, and contact time of 100 min.

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“…Cellulose nanocrystals (CNCs) is a material that has the ability to form liquid crystals and exhibiting a self-ordering behavior [1][2][3][4]. This behavior is due to the rod-like shape of the CNCs, and has also been found in other rod-like materials [1].…”

Section: Introductionmentioning

confidence: 99%

Self-ordered cellulose nanocrystals and microscopic investigations

Castro-Guerrero

Morales‐Cepeda

Díaz-Guillén

et al. 2020

Materials Science-Poland

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Cellulose nanocrystals were extracted from cotton. The cellulose nanocrystals made a self-assembly structure when dried under slow conditions, as it was revealed by the characterization made to the material. The AFM images of the nanocrystals showed that they had a changing local orientation, pointing in a preferred direction that underwent a periodic change. This periodic change resembles the orientation of a chiral nematic phase. The TEM images showed that the nanocrystals had a rod-like appearance with average length size of 98.5 nm and a diameter of 4.7 nm. The TEM characterization showed the nanocrystals with more details than AFM. In this paper, the self-assembling of CNC was observed by AFM, and further investigations were done by TEM, deconvoluting the process of CNC nanorods aggregation.

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Heavy metal removal using hydroxypropyl cellulose and polyacrylamide gels, kinetical study

Cited by 17 publications

References 42 publications

Using hydrogel-biochar composites for enhanced cadmium removal from aqueous media

Using hydrogel-biochar composites for enhanced cadmium removal from aqueous media

Preparation, Characterization and Utilization of Polyacrylamid-Kaolin Composite in the Removal of Nickel Ions From Water

Self-ordered cellulose nanocrystals and microscopic investigations

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