Hazardous ions decontamination: From the element to the material

López, Yeisy C.; Ortega, Greter A.; Reguera, E.

doi:10.1016/j.ceja.2022.100297

Cited by 16 publications

(6 citation statements)

References 189 publications

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“…Most conventional strategies used for wastewater treatment, such as chemical precipitation, membrane separation, ion exchange, and electrochemical treatments, present limitations which make their scaling up difficult, thus discouraging their application in real contexts in which large water volumes have to be treated, preferably with simple and low-cost procedures based on reusable materials, allowing for reductions in the required time and costs [9][10][11][12][13]. Chemical precipitation, for example, despite being an economical method, requires additional costs for the disposal of the large quantities of sludge produced during the purification process itself [14]. Membrane separation is a pressure treatment method whose efficacy strongly depends on the selection of the membrane, and large-scale application is complicated.…”

Section: Introductionmentioning

confidence: 99%

Cellulose-Based Hydrogels for Wastewater Treatment: A Focus on Metal Ions Removal

Persano,

Malitesta,

Mazzotta

2024

Polymers

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The rapid worldwide industrial growth in recent years has made water contamination by heavy metals a problem that requires an immediate solution. Several strategies have been proposed for the decontamination of wastewater in terms of heavy metal ions. Among these, methods utilizing adsorbent materials are preferred due to their cost-effectiveness, simplicity, effectiveness, and scalability for treating large volumes of contaminated water. In this context, heavy metal removal by hydrogels based on naturally occurring polymers is an attractive approach for industrial wastewater remediation as they offer significant advantages, such as an optimal safety profile, good biodegradability, and simple and low-cost procedures for their preparation. Hydrogels have the ability to absorb significant volumes of water, allowing for the effective removal of the dissolved pollutants. Furthermore, they can undergo surface chemical modifications which can further improve their ability to retain different environmental pollutants. This review aims to summarize recent advances in the application of hydrogels in the treatment of heavy metal-contaminated wastewater, particularly focusing on hydrogels based on cellulose and cellulose derivatives. The reported studies highlight how the adsorption properties of these materials can be widely modified, with a wide range of adsorption capacity for different heavy metal ions varying between 2.3 and 2240 mg/g. The possibility of developing new hydrogels with improved sorption performances is also discussed in the review, with the aim of improving their effective application in real scenarios, indicating future directions in the field.

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Section: Introductionmentioning

confidence: 99%

Cellulose-Based Hydrogels for Wastewater Treatment: A Focus on Metal Ions Removal

Persano,

Malitesta,

Mazzotta

2024

Polymers

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“…And is also a versatile finishing process with a wide range of applications such as nickel electroplating, engineering, and decorative (25). On the other hand, nickel is a carcinogenic metal and also causes pulmonary and reproductive toxicity with prolonged and repeated exposure (26). Chromium is one of the most essential elements for humans and animals.…”

Section: Introductionmentioning

confidence: 99%

Elimination of nickel and chromium(VI) ions from industerial wastewater by electrodialysis/characteristics/impact of parameters

2024

Global NEST Journal

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<p>Healthy water is a concern for the world due to rapid population growth and technological advancement. The entry of heavy metals into water as a result of various activities causes water pollution that has persistent effects. In this study, a specially designed electrodialysis cell was used to remove chromium (VI) and nickel ions from wastewater. The chambers were partitioned by Ionac MC 3470 cation exchange and Ionac MA 3475 anion exchange membranes. The cathode and anode were made of carbon fiber and stainless steel, respectively. The effects of voltage, initial pH, time, Na2SO4 concentration, feed flow rate and metal ion concentration on metal removal efficiency, energy consumption, current efficiency, current density and flux were investigated. Optimum values for 98.5% removal of 80 mg/L Cr(VI) ion in 90 min voltage 30 V, pH=3, addition of Na2SO4 0.5 g and feed flow rate 52. 8 ml/min, as observed. At the end of this period, concentration 1 mg/L, energy consumption 40 W/L, flow efficiency 30% and flux 12 x 10.-5 mol/m2s were calculated. Optimum values of 25 V, pH=3, addition of Na2SO4 0.2 g and Qf = 42.6 mL/min were observed for 94.3% removal of 50 mg/L Ni2+ ions in 90 min. At the end of this period, the nickel ion concentration was 4 mg/L, the energy consumption was 34 Wh/L, the flow efficiency was 96.51%, and the flux was calculated as 40×10-5 mol/m2s. This study shows that the electrodialysis method can be effectively used to elimonation chromium (VI) and nickel (II) ions from dilute wastewaters.</p>

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“…Over the past few decades, strict rules have been implemented regarding environmental protection and management. Various methods have been adopted to decontaminate industrial effluents, such as coagulation, chemical precipitation, adsorption, biosorption, ion exchange, membrane filtration, and electrochemical treatment (López et al, 2022). However, these technologies are often ineffective due to high operating and maintenance costs, as well as the requirement of highly skilled personnel to handle the management of the sludge generated during the process (Koul et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Removal of heavy metal ions from water using nanocellulose-based membranes derived from macroalgae Chara corallina

Yousif,

Hassan,

Ibraheem

2024

J. Degrade. Min. Land Manage.

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Chara corallina is a freshwater macroalgae found in aquatic-terrestrial boundary environments. Their cellulose fibers have a crystallinity and biosynthesis similar to those of terrestrial plants. The algal nanocellulose (NC) was prepared through a series of chemical treatments, including alkaline, bleaching, grinding, and acid hydrolysis. The X-ray diffraction (XRD) crystallinity index of nanocellulose was 85.64%. The cellulose nanocrystals are seen in the form of nanorods, and the specific surface area of the sample of NC found was 5.823 m2g-1. The study aimed to test the effectiveness of a nanocellulose composite membrane in removing heavy metal ions, specifically cadmium (Cd), nickel (Ni), and lead (Pb) ions, from an aqueous solution. A vacuum filtration unit was used for the experiment, where up to five filter layers of composite membranes were examined for their ability to remove heavy metal ions. The results showed that the highest removal rates of Cd2+, Ni2+, and Pb2+ ions were 98.20%, 95.15%, and 93.80%, respectively, when using five layers of membranes of NC with the adsorbent dose set at 20 ppm. Cellulose and its derivatives are essential in sustainable technology for wastewater treatment, as they demonstrate exceptional performance in removing various types of pollutants, including heavy metals, dyes, and other pollutants. Cellulose is preferred due to its low cost, biodegradability, eco-friendliness, and simple surface modification.

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Hazardous ions decontamination: From the element to the material

Cited by 16 publications

References 189 publications

Cellulose-Based Hydrogels for Wastewater Treatment: A Focus on Metal Ions Removal

Cellulose-Based Hydrogels for Wastewater Treatment: A Focus on Metal Ions Removal

Elimination of nickel and chromium(VI) ions from industerial wastewater by electrodialysis/characteristics/impact of parameters

Removal of heavy metal ions from water using nanocellulose-based membranes derived from macroalgae Chara corallina

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