Fabrication and Characterization of Xanthan Gum-cl-poly(acrylamide-co-alginic acid) Hydrogel for Adsorption of Cadmium Ions from Aqueous Medium

Sharma, Gaurav; Kumar, Amit; Ghfar, Ayman A.; García‐Peñas, Alberto; Naushad, Mu.; Stadler, Florian J.

doi:10.3390/gels8010023

Cited by 26 publications

(13 citation statements)

References 55 publications

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“…However, the BET model cannot converge to all the adsorption data, so the adsorption of Pb(II) onto AHC0.1 and SSHC was supposed to be monolayer. Hence, the adsorption is less likely to be governed by physisorption [ 34 ]. Considering the result of the mechanism study mentioned below, the adsorption process is prone to be governed by chemisorption, but physisorption also exists.…”

Section: Resultsmentioning

confidence: 99%

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Preparation of Citric Acid-Sewage Sludge Hydrochar and Its Adsorption Performance for Pb(II) in Aqueous Solution

Huang

Wang

2022

Polymers

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In order to seek the value-added utilization method of sewage sludge and develop low-cost and high-efficient adsorbents, a hydrochar was prepared by the co-hydrothermal carbonization of sewage sludge and citric acid and then characterized. The differences in Pb(II) adsorption performance between the citric acid–sewage sludge hydrochars (AHC) and the hydrochar prepared solely from sewage sludge (SSHC) were also investigated. When citric acid dose ratio (mass ratio of citric acid to dry sewage sludge) is 0.1, the obtained hydrohcar (AHC0.1) has the highest specific surface area (59.95 m2·g−1), the most abundant oxygen-containing functional groups, the lowest pHpzc (5.43), and the highest equilibrium adsorption capacity for Pb(II). The maximum adsorption capacity of AHC0.1 for Pb(II) is 60.88 mg·g−1 (298 K), which is approximately 1.3 times that of SSHC. The potential mechanisms can be electrostatic attraction, co-precipitation, complexation, and cation-π interaction. It was demonstrated that by incorporating citric acid into the hydrothermal carbonization, resource utilization of sewage sludge can be accomplished effectively.

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Section: Resultsmentioning

confidence: 99%

“…BET isotherm model, as a multilayer adsorption isotherm model, was also considered to simulate the data of Pb(II) adsorption by AHC0.1 and SSHC [ 34 , 35 ]:

where C s stands for monolayer saturation concentration, mg·L −1 , C BET denotes BET constants, L·mg −1 , q s represents isotherm saturation capacity, mg·g −1 .…”

Section: Methodsmentioning

confidence: 99%

Preparation of Citric Acid-Sewage Sludge Hydrochar and Its Adsorption Performance for Pb(II) in Aqueous Solution

Huang

Wang

2022

Polymers

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“…As the reaction processed, residual Sb decreased in the first 24 hours, which is probably due to the high accessibility of free or active adsorbent sites. In the following 96 hours, it did not change seriously due to the partial saturation of accessible active sites (Sharma et al 2022). When 0.03, 0.05, 0.09, and 0.15 g iron was added, dissolved Sb in solution at the end of experiment was 15.33, 13.39, 12.02 and 10.41 mg/L, respectively.…”

Section: Sb(iii) Removal Ability Of Active Iob-lmentioning

confidence: 96%

Influence of different iron sources on Sb(III) removal from water by active iron-oxidizing bacteria and its mechanism

Liu

et al. 2022

Water Science and Technology

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Iron-oxidizing bacteria played an important role in the treatment of Sb-containing wastewater. In this study, effect of different iron sources on Sb(III) removal ability by isolated iron-oxidizing bacteria (named as IOB-L) was conducted systemically in batch experiment. Moreover, ferrous lactate and zero-valent iron were chosen as iron sources for IOB-L. The results showed that after inoculation of 2% volume of IOB-L, Sb(III) concentration in water decreased from initial 18 mg/L to 4.1 mg/L at optimal pH of 7.0. There was no reaction between Sb(III) and ferrous lactate, whereas corrosion product of iron can adsorb certain amount of Sb. When active IOB-L cultivated in ferrous lactate, a better removal rate of Sb(III) can be reached with a longer stagnate phase for bacteria. However, Sb(III) removal ability of IOB-L using zero-valent iron as iron source was lower. SEM-EDS, FTIR, and XPS analysis further indicated that ferrous lactate was oxidized by IOB-L and precipitated as biogenic iron oxides which had strong adsorption ability towards Sb(III), whereas zero-valent iron was not a good iron source.

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“…Many biopolymers are being implemented in different coating materials due to their excellent properties in terms of degradability and compatibility; these biopolymers include gums, starch, proteins cellulose, lipids, and their derivatives [ 77 , 78 , 79 , 80 , 81 , 82 , 83 ]. In this sense, chitosan is a promising material for that purpose due to several reasons associated with its biocompatibility and abundance [ 84 , 85 ].…”

Section: Applications Of Chitosan For Sustainable Developmentmentioning

confidence: 99%

Chitosan as a Tool for Sustainable Development: A Mini Review

et al. 2022

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New developments require innovative ecofriendly materials defined by their biocompatibility, biodegradability, and versatility. For that reason, the scientific society is focused on biopolymers such as chitosan, which is the second most abundant in the world after cellulose. These new materials should show good properties in terms of sustainability, circularity, and energy consumption during industrial applications. The idea is to replace traditional raw materials with new ecofriendly materials which contribute to keeping a high production rate but also reducing its environmental impact and the costs. The chitosan shows interesting and unique properties, thus it can be used for different purposes which contributes to the design and development of sustainable novel materials. This helps in promoting sustainability through the use of chitosan and diverse materials based on it. For example, it is a good sustainable alternative for food packaging or it can be used for sustainable agriculture. The chitosan can also reduce the pollution of other industrial processes such as paper production. This mini review collects some of the most important advances for the sustainable use of chitosan for promoting circular economy. Hence, the present review focuses on different aspects of chitosan from its synthesis to multiple applications.

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Fabrication and Characterization of Xanthan Gum-cl-poly(acrylamide-co-alginic acid) Hydrogel for Adsorption of Cadmium Ions from Aqueous Medium

Cited by 26 publications

References 55 publications

Preparation of Citric Acid-Sewage Sludge Hydrochar and Its Adsorption Performance for Pb(II) in Aqueous Solution

Preparation of Citric Acid-Sewage Sludge Hydrochar and Its Adsorption Performance for Pb(II) in Aqueous Solution

Influence of different iron sources on Sb(III) removal from water by active iron-oxidizing bacteria and its mechanism

Chitosan as a Tool for Sustainable Development: A Mini Review

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