Recent trends of MnO <sub>2</sub>-derived adsorbents for water treatment: a review

Author(s): Syed M. Husnain ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Umar Asim ⁶ ^, ⁷ ^, ⁸ ^, ⁵ , Azra Yaqub ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Faisal Shahzad ⁹ ^, ¹⁰ ^, ¹¹ ^, ¹² ^, ⁵ , Naseem Abbas ⁶ ^, ⁷ ^, ⁸ ^, ⁵

Publication date (Electronic): 2020

Journal: New Journal of Chemistry

Publisher: Royal Society of Chemistry (RSC)

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Abstract

Over the years, manganese dioxide (MnO ₂) and its different allotropes have gained significant research attention in the field of wastewater treatment because of their exciting physicochemical properties. This review covers recent progress in MnO ₂based materials for wastewater remediation. The structure details of MnO ₂are summarized followed by an overview of different methods adopted for the preparation of MnO ₂and its composites. Special attention is paid to their applications in removal of metal ions and dyes. Some case studies are also presented to give insight into the potential of MnO ₂for use on a pilot scale for the removal of metal ions. At the end, future perspectives are also suggested.

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Fundamentals and Catalytic Applications of CeO2-Based Materials.

Tiziano Montini, Michele Melchionna, Matteo Monai … (2016)

Cerium dioxide (CeO2, ceria) is becoming an ubiquitous constituent in catalytic systems for a variety of applications. 2016 sees the 40(th) anniversary since ceria was first employed by Ford Motor Company as an oxygen storage component in car converters, to become in the years since its inception an irreplaceable component in three-way catalysts (TWCs). Apart from this well-established use, ceria is looming as a catalyst component for a wide range of catalytic applications. For some of these, such as fuel cells, CeO2-based materials have almost reached the market stage, while for some other catalytic reactions, such as reforming processes, photocatalysis, water-gas shift reaction, thermochemical water splitting, and organic reactions, ceria is emerging as a unique material, holding great promise for future market breakthroughs. While much knowledge about the fundamental characteristics of CeO2-based materials has already been acquired, new characterization techniques and powerful theoretical methods are deepening our understanding of these materials, helping us to predict their behavior and application potential. This review has a wide view on all those aspects related to ceria which promise to produce an important impact on our life, encompassing fundamental knowledge of CeO2 and its properties, characterization toolbox, emerging features, theoretical studies, and all the catalytic applications, organized by their degree of establishment on the market.

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Global Water Pollution and Human Health

René P Schwarzenbach, Thomas Egli, Thomas Hofstetter … (2010)

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Emerging pollutants in the environment: present and future challenges in biomonitoring, ecological risks and bioremediation.

Katerina Demnerova, Maria Gavrilescu, Fabio Fava … (2015)

Emerging pollutants reach the environment from various anthropogenic sources and are distributed throughout environmental matrices. Although great advances have been made in the detection and analysis of trace pollutants during recent decades, due to the continued development and refinement of specific techniques, a wide array of undetected contaminants of emerging environmental concern need to be identified and quantified in various environmental components and biological tissues. These pollutants may be mobile and persistent in air, water, soil, sediments and ecological receptors even at low concentrations. Robust data on their fate and behaviour in the environment, as well as on threats to ecological and human health, are still lacking. Moreover, the ecotoxicological significance of some emerging micropollutants remains largely unknown, because satisfactory data to determine their risk often do not exist. This paper discusses the fate, behaviour, (bio)monitoring, environmental and health risks associated with emerging chemical (pharmaceuticals, endocrine disruptors, hormones, toxins, among others) and biological (bacteria, viruses) micropollutants in soils, sediments, groundwater, industrial and municipal wastewaters, aquaculture effluents, and freshwater and marine ecosystems, and highlights new horizons for their (bio)removal. Our study aims to demonstrate the imperative need to boost research and innovation for new and cost-effective treatment technologies, in line with the uptake, mode of action and consequences of each emerging contaminant. We also address the topic of innovative tools for the evaluation of the effects of toxicity on human health and for the prediction of microbial availability and degradation in the environment. Additionally, we consider the development of (bio)sensors to perform environmental monitoring in real-time mode. This needs to address multiple species, along with a more effective exploitation of specialised microbes or enzymes capable of degrading endocrine disruptors and other micropollutants. In practical terms, the outcomes of these activities will build up the knowledge base and develop solutions to fill the significant innovation gap faced worldwide.

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Author and article information

Contributors

Syed M. Husnain: (View ORCID Profile)

Faisal Shahzad: (View ORCID Profile)

Journal

Journal ID (publisher-id): NJCHE5

Title: New Journal of Chemistry

Abbreviated Title: New J. Chem.

Publisher: Royal Society of Chemistry (RSC)

ISSN (Print): 1144-0546

ISSN (Electronic): 1369-9261

Publication date Created: April 27 2020

Publication date (Electronic): 2020

Volume: 44

Issue: 16

Pages: 6096-6120

Affiliations

[1 ]Chemistry Division

[2 ]Directorate of Science

[3 ]Pakistan Institute of Nuclear Science and Technology (PINSTECH)

[4 ]Islamabad

[5 ]Pakistan

[6 ]Institute of Chemical Sciences

[7 ]Bahauddin Zakariya University

[8 ]Multan 60800

[9 ]National Center for Nanotechnology

[10 ]Department of Metallurgy and Materials Engineering

[11 ]Pakistan Institute of Engineering and Applied Sciences (PIEAS)

[12 ]Islamabad 45650

Article

DOI: 10.1039/C9NJ06392G

SO-VID: b16f4076-0333-4fc4-9c14-bf903b9e484a

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http://rsc.li/journals-terms-of-use

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