Novel and highly efficient functionalized bentonite for elimination of Cu2+ and Cd2+ from aqueous wastes

Malsawmdawngzela, Ralte; Lalhmunsiama,; Tiwari, Diwakar

doi:10.4491/eer.2021.355

Cited by 5 publications

(7 citation statements)

References 79 publications

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“…Additionally, due to their negatively charged surfaces, high surface area, swelling capacity (particularly the bentonite and montmorillonite clays), cation exchange capacity, and strong adsorption/absorption properties, clays find a huge application in the field of environmental remediation [91,92]. They can also be simply functionalized by varying their surface hydrophilicity/hydrophobicity and adsorption properties [93,94].…”

Section: System Preparation Methods Filtration Process Pollutant Trea...mentioning

confidence: 99%

Development of Functional Hybrid Polymers and Gel Materials for Sustainable Membrane-Based Water Treatment Technology: How to Combine Greener and Cleaner Approaches

Rando

Sfameni

Plutino

2022

Gels

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Water quality and disposability are among the main challenges that governments and societies will outside during the next years due to their close relationship to population growth and urbanization and their direct influence on the environment and socio-economic development. Potable water suitable for human consumption is a key resource that, unfortunately, is strongly limited by anthropogenic pollution and climate change. In this regard, new groups of compounds, referred to as emerging contaminants, represent a risk to human health and living species; they have already been identified in water bodies as a result of increased industrialization. Pesticides, cosmetics, personal care products, pharmaceuticals, organic dyes, and other man-made chemicals indispensable for modern society are among the emerging pollutants of difficult remediation by traditional methods of wastewater treatment. However, the majority of the currently used waste management and remediation techniques require significant amounts of energy and chemicals, which can themselves be sources of secondary pollution. Therefore, this review reported newly advanced, efficient, and sustainable techniques and approaches for water purification. In particular, new advancements in sustainable membrane-based filtration technologies are discussed, together with their modification through a rational safe-by-design to modulate their hydrophilicity, porosity, surface characteristics, and adsorption performances. Thus, their preparation by the use of biopolymer-based gels is described, as well as their blending with functional cross-linkers or nanofillers or by advanced and innovative approaches, such as electrospinning.

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Section: System Preparation Methods Filtration Process Pollutant Trea...mentioning

confidence: 99%

Development of Functional Hybrid Polymers and Gel Materials for Sustainable Membrane-Based Water Treatment Technology: How to Combine Greener and Cleaner Approaches

Rando

Sfameni

Plutino

2022

Gels

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“…The International Agency for Research on Cancer (IARC 2012) has categorized inorganic As (iAs) as a Group I carcinogen for causing skin cancer, kidney cancer, and bladder cancer. Generally, water contaminated with As contains more than 10 µg/L As (WHO guideline value) [4], and, in some regions, these levels can Water 2024, 16, 940 2 of 12 reach as high as 1480 µg/L. Therefore, proper remediation techniques must be developed for the removal of iAs from water in order to reduce the human health risks associated with As.…”

Section: Introductionmentioning

confidence: 99%

“…Phosphate (PO 4 3− ), a chemical analog of arsenate, has been documented to significantly influence the absorption and biotransformation of iAs V in algae [10]. Once inside the cell, iAs V has the capacity to act as a substitute for PO 4 3− in various biochemical reactions, some of which lead to the toxic effects of As. For instance, iAs V substituted for PO 4 3− interferes with ATP and nucleic acid synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Once inside the cell, iAs V has the capacity to act as a substitute for PO 4 3− in various biochemical reactions, some of which lead to the toxic effects of As. For instance, iAs V substituted for PO 4 3− interferes with ATP and nucleic acid synthesis. Phosphate, a crucial chemical known to limit growth in numerous eutrophic freshwater environments [11], has the potential to promote the proliferation of undesirable organisms, leading to ecological dominance.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Phosphate and Arsenate on As Metabolism in Microcystis aeruginosa at Different Growth Phases

Zhang,

Liu,

Yang

et al. 2024

Water

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Arsenic (As) metabolism in freshwater algae at different growth phases has rarely been documented. To address this gap, this study was conducted to assess the intra- and extracellular As metabolism, along with speciation changes, in Microcystis aeruginosa across three growth phases. The treatment involved varying concentrations of As (0, 0.4, 0.6, 0.8 and 1 mg/L, in the form of arsenate, iAsV) under three phosphorus levels (0.02 mg/L as low, 0.1 mg/L as medium, and 0.5 mg/L as high P in the form of phosphate). The findings revealed that extracellular iAsV remained the dominant As species during the lag and exponential growth phases of M. aeruginosa in the growth media, while intracellular trivalent As (iAsIII) emerged as the pronounced species during the exponential growth phase, but also exhibited a significant negative correlation with the P levels. Moreover, elevated P levels had promoted the formation of intra- and extracellular dimethylarsinic acid (DMA) and monomethylarsonic acid (MMA) in the exponential growth phase. During the stationary growth phase, intracellular iAsV was found to decrease with the increasing P levels. During the whole growth phases, P had consistently reduced algal As absorption levels. The significant promotion of algal As absorption in response to iAsV was observed only during the lag growth phase. The As bioaccumulation exhibited a correlational relationship with the algal reproduction. Both low and high P levels (0.02 and 0.5 mg/L) decreased the accumulation of As in algae cells during the exponential and stationary growth phases. The transformation and release rate of As were concomitantly influenced by P, and exhibited the same trends within the growth phase. These trends differed between the exponential and stationary growth phases, with an inhibitory effect being present during the former, while a promotional effect was observed during the latter. This study provides insight into potential As hazards in freshwater lakes with algae bloom.

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“…Several attempts have been made to reduce Cu(II) from aqueous media, including electrocoagulation [8], reverse osmosis [9], filtration [10], membranes [11], electrodialysis [12], biochemical treatment [13], adsorption/biosorption [14,15], etc. Among these treatments, the adsorption process is widely accepted for its cost-effectiveness and simplicity.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of copper on iminodisuccinic acid modified attapulgite: characterization and mechanism

Zhu

Zhu²,

Meng³

et al. 2022

Environmental Engineering Research

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Heavy-metal ions are common pollutants in wastewater and are thus attracting considerable attention. Herein, an eco-friendly biodegradable adsorbent, iminodisuccinic acid (IDS) modified attapulgite (ATP) is prepared by graft-polymerization to reduce Cu(II) in water, referred as IDS-ATP. The equilibrium adsorption capacity of IDS-ATP for Cu(II) is increased by 329.5% and 272% compared with raw ATP and non-degradable chelator ethylenediaminetetraacetic acid-modified ATP (EDTA-ATP), respectively. Moreover, the adsorption capacities for Cu(II) in combined system increased by 186% compared with in single system. The structure and surface properties of IDS-ATP are characterized, demonstrating that the IDS moieties are anchored on the surface of ATP without structural damage. In the aqueous Cu(II) (64 mg /L), the best adsorption pH is 5.0, the best dosage is 800 mg/L, and the adsorption equilibrium time is 4 h. The adsorption of IDS-ATP is chemical adsorption and regenerated adsorbent still exhibits high adsorption capacity. The adsorption mechanism includes the coordination of amino groups with Cu(II), the chelation of -COOH on heavy metals (HMs), and the ion exchange. Taking Cu(II) as an example to study the process of IDS-ATP in water, it is beneficial to apply this degradable material to reduce the other HMs.

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Novel and highly efficient functionalized bentonite for elimination of Cu2+ and Cd2+ from aqueous wastes

Cited by 5 publications

References 79 publications

Development of Functional Hybrid Polymers and Gel Materials for Sustainable Membrane-Based Water Treatment Technology: How to Combine Greener and Cleaner Approaches

Development of Functional Hybrid Polymers and Gel Materials for Sustainable Membrane-Based Water Treatment Technology: How to Combine Greener and Cleaner Approaches

Effects of Phosphate and Arsenate on As Metabolism in Microcystis aeruginosa at Different Growth Phases

Adsorption of copper on iminodisuccinic acid modified attapulgite: characterization and mechanism

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