Ongoing progress on novel nanocomposite membranes for the separation of heavy metals from contaminated water

Castro‐Muñoz, Roberto; González-Melgoza, Luisa Loreti; García‐Depraect, Octavio

doi:10.1016/j.chemosphere.2020.129421

Cited by 150 publications

(46 citation statements)

References 174 publications

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“…For instance, a stronger inhibitory effect has been demonstrated at lower pH, such inhibitory effect decreases as the pH increases, and this is attributed to the neutralization of the -NH 2 groups in the alkaline medium [16,20]. CS can also act as a chelator for metal ions (e.g., nickel, zinc, cobalt, iron, magnesium, and copper) [21], and some studies promote its addition to modify the ionic strength [16], however divalent ions have been shown to attenuate the inhibitory activity of CS [22]. Regarding the antimicrobial effect of CS, Table 1 lists some of the pathogens that have been inhibited by CS.…”

Section: Bioactivity Of Chitosanmentioning

confidence: 99%

Trends in Chitosan as a Primary Biopolymer for Functional Films and Coatings Manufacture for Food and Natural Products

Díaz‐Montes

Castro-Muñoz

2021

Polymers

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Some of the current challenges faced by the food industry deal with the natural ripening process and the short shelf-life of fresh and minimally processed products. The loss of vitamins and minerals, lipid oxidation, enzymatic browning, and growth of microorganisms have been the main issues for many years within the innovation and improvement of food packaging, which seeks to preserve and protect the product until its consumption. Most of the conventional packaging are petroleum-derived plastics, which after product consumption becomes a major concern due to environmental damage provoked by their difficult degradation. In this sense, many researchers have shown interest in edible films and coatings, which represent an environmentally friendly alternative for food packaging. To date, chitosan (CS) is among the most common materials in the formulation of these biodegradable packaging together with polysaccharides, proteins, and lipids. The good film-forming and biological properties (i.e., antimicrobial, antifungal, and antiviral) of CS have fostered its usage in food packaging. Therefore, the goal of this paper is to collect and discuss the latest development works (over the last five years) aimed at using CS in the manufacture of edible films and coatings for food preservation. Particular attention has been devoted to relevant findings in the field, together with the novel preparation protocols of such biodegradable packaging. Finally, recent trends in new concepts of composite films and coatings are also addressed.

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Section: Bioactivity Of Chitosanmentioning

confidence: 99%

Trends in Chitosan as a Primary Biopolymer for Functional Films and Coatings Manufacture for Food and Natural Products

Díaz‐Montes

Castro-Muñoz

2021

Polymers

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“…A novel nanocomposite membrane was developed for the removal of heavy metals, and its performance was compared to the polymeric membranes. It was concluded that while the polymeric membranes can exhibit a rejection from 77 up to 99%, the nanocomposite membranes can completely reject heavy metals (up to 100%) [96]. Table 3 summarizes the recent literature of various NF membranes used for heavy metal removal and their performance.…”

Section: Nanofiltration For the Removal Of Heavy Metals From Wastewatermentioning

confidence: 99%

Pressure-Driven Membrane Process: A Review of Advanced Technique for Heavy Metals Remediation

et al. 2021

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Pressure-driven processes have come a long way since they were introduced. These processes, namely Ultra-Filtration (UF), Nano-Filtration (NF), and Reverse-Osmosis (RO), aim to enhance the efficiency of wastewater treatment, thereby aiming at a cleaner production. Membranes may be polymeric, ceramic, metallic, or organo-mineral, and the filtration techniques differ in pore size from dense to porous membrane. The applied pressure varies according to the method used. These are being utilized in many exciting applications in, for example, the food industry, the pharmaceutical industry, and wastewater treatment. This paper attempts to comprehensively review the principle behind the different pressure-driven membrane technologies and their use in the removal of heavy metals from wastewater. The transport mechanism has been elaborated, which helps in the predictive modeling of the membrane system. Fouling of the membrane is perhaps the only barrier to the emergence of membrane technology and its full acceptance. However, with the use of innovative techniques of fabrication, this can be overcome. This review is concluded with perspective recommendations that can be incorporated by researchers worldwide as a new problem statement for their work.

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“…As the main separation element of membrane-based processes, membranes have attracted great attention from researchers in many water treatment applications such as wastewater treatment, water purification, water disinfection, toxic and non-toxic chemical molecules, and heavy metals [ 191 ]. Compared with the original ultrafiltration membrane, nanocomposite materials can increase the surface roughness and the number of pores with decreased pore size, improving the ultrafiltration performance by increasing the selectivity and permeability of the membrane [ 192 ].…”

Section: Nanotechnology-based Heavy Metal Removal In Food and Watermentioning

confidence: 99%

Application of Nanotechnology in Analysis and Removal of Heavy Metals in Food and Water Resources

et al. 2021

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Toxic heavy metal contamination in food and water from environmental pollution is a significant public health issue. Heavy metals do not biodegrade easily yet can be enriched hundreds of times by biological magnification, where toxic substances move up the food chain and eventually enter the human body. Nanotechnology as an emerging field has provided significant improvement in heavy metal analysis and removal from complex matrices. Various techniques have been adapted based on nanomaterials for heavy metal analysis, such as electrochemical, colorimetric, fluorescent, and biosensing technology. Multiple categories of nanomaterials have been utilized for heavy metal removal, such as metal oxide nanoparticles, magnetic nanoparticles, graphene and derivatives, and carbon nanotubes. Nanotechnology-based heavy metal analysis and removal from food and water resources has the advantages of wide linear range, low detection and quantification limits, high sensitivity, and good selectivity. There is a need for easy and safe field application of nanomaterial-based approaches.

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Ongoing progress on novel nanocomposite membranes for the separation of heavy metals from contaminated water

Cited by 150 publications

References 174 publications

Trends in Chitosan as a Primary Biopolymer for Functional Films and Coatings Manufacture for Food and Natural Products

Trends in Chitosan as a Primary Biopolymer for Functional Films and Coatings Manufacture for Food and Natural Products

Pressure-Driven Membrane Process: A Review of Advanced Technique for Heavy Metals Remediation

Application of Nanotechnology in Analysis and Removal of Heavy Metals in Food and Water Resources

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