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Efficient Approaches Towards Removal of Pollutants From Water.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Efficient Approaches Towards Removal of Pollutants From Water./
作者:	Batool, Asma.
面頁冊數:	1 online resource (235 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-04, Section: A.
Contained By:	Dissertations Abstracts International84-04A.
標題:	Disadvantages. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29352412click for full text (PQDT)
ISBN:	9798352684870

Efficient Approaches Towards Removal of Pollutants From Water.
Batool, Asma.

Efficient Approaches Towards Removal of Pollutants From Water. - 1 online resource (235 pages)

Source: Dissertations Abstracts International, Volume: 84-04, Section: A.

Thesis (Ph.D.)--National University of Singapore (Singapore), 2022.

Includes bibliographical references

In recent times, dyes and man-made 'plastic' has penetrated every aspect of human life. Water scarcity due to contamination with polymer products, organic dyes and toxic metal ions represent a serious worldwide problem in the 21st century. Most of the dyes are causing severe public health concerns, contaminating underground water resources, and inhibiting the photosynthesis process by decreasing light permeability. Likewise, water soluble dyes, dissolved nature of heavy metals make them to be absorbed by living organisms and open a path to enter the food chain and thus start to accumulate in human body. Along with dissolved pollutants, plastic contamination is a major environmental problem around the world owing to ubiquitous distribution in large quantities and persistent presence in the environment due to slow degradation. Plastic waste materials include articles with different size ranges (micro to nanoscale), varying composition and show different degradation or stability patterns. Smaller particles of plastics enter the environment through various channels, which include release from plastic industries, day-to-day usage of plastic articles and as an additive in personal care products. Often, MPs are too small to be seen and are unevenly distributed in the environment due to differences in shape, size, and density, rendering them difficult to find and quantify in environmental samples. In short, both dissolved (i.e., dyes and heavy metals) and dispersed (plastic particle) pollutants are causing a significant impact on the environment. The purpose of this research was to generate effective adsorbent and an incisive understanding of the quantitative distribution, detection, analysis, and removal of soluble contaminants and synthetic nanoplastic from the water.In chapter 1, a brief literature survey on the different routes/technologies/systems to mitigate the emerging contaminants was provided. Furthermore, functionalization and applications of cellulose-based adsorbents were also discussed.The preparation, detailed characterization and adsorption studies of silicacoated soya waste was reported in chapter 2. This silica coating increases the active functionalities (i.e., Si-O-Si and Si-O-C etc.) on the surface of the biomass, hence, resulting in the fast and effective (≥98%) adsorption of organic dyes with cationic properties. Such modifications are useful towards developing the potential adsorbents for various pollutants in the future from waste resources.In chapter 3, the cellulosic network was prepared by crosslinking hydroxyl group of cellulose backbone and amino group of the polyethyleneimine molecules via glutar aldehyde crosslinker. The detailed structural characterization, comparison of properties of both unmodified and modified fibers were discussed. Incorporation of amino groups resulted in different physicochemical properties and mechanical strength of the fibers. Such functionalization not only facilitated the extraction of multiple pollutants with different structural and chemical properties but also significantly enhanced the recyclability. Furthermore, the amount adsorbed onto the synthesized adsorbent (PEI/CE) was much higher than the related reported systems. This chapter offers a simple synthetic strategy for the development of scalable, biocompatible, and recyclable systems which could be useful for the removal of several pollutants simultaneously.More importantly, the amino-functionalized cellulose fibers helped to extract the smaller sized (≤100 nm) plastic particulates efficiently (Chapter 4, ≥98 %). The detailed quantitative analysis and characterization of the adsorbent before and after polymer particles removal was also provided.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798352684870Subjects--Topical Terms:

3684692
Disadvantages.
Index Terms--Genre/Form:

542853
Electronic books.

Efficient Approaches Towards Removal of Pollutants From Water.
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520 $a In recent times, dyes and man-made 'plastic' has penetrated every aspect of human life. Water scarcity due to contamination with polymer products, organic dyes and toxic metal ions represent a serious worldwide problem in the 21st century. Most of the dyes are causing severe public health concerns, contaminating underground water resources, and inhibiting the photosynthesis process by decreasing light permeability. Likewise, water soluble dyes, dissolved nature of heavy metals make them to be absorbed by living organisms and open a path to enter the food chain and thus start to accumulate in human body. Along with dissolved pollutants, plastic contamination is a major environmental problem around the world owing to ubiquitous distribution in large quantities and persistent presence in the environment due to slow degradation. Plastic waste materials include articles with different size ranges (micro to nanoscale), varying composition and show different degradation or stability patterns. Smaller particles of plastics enter the environment through various channels, which include release from plastic industries, day-to-day usage of plastic articles and as an additive in personal care products. Often, MPs are too small to be seen and are unevenly distributed in the environment due to differences in shape, size, and density, rendering them difficult to find and quantify in environmental samples. In short, both dissolved (i.e., dyes and heavy metals) and dispersed (plastic particle) pollutants are causing a significant impact on the environment. The purpose of this research was to generate effective adsorbent and an incisive understanding of the quantitative distribution, detection, analysis, and removal of soluble contaminants and synthetic nanoplastic from the water.In chapter 1, a brief literature survey on the different routes/technologies/systems to mitigate the emerging contaminants was provided. Furthermore, functionalization and applications of cellulose-based adsorbents were also discussed.The preparation, detailed characterization and adsorption studies of silicacoated soya waste was reported in chapter 2. This silica coating increases the active functionalities (i.e., Si-O-Si and Si-O-C etc.) on the surface of the biomass, hence, resulting in the fast and effective (≥98%) adsorption of organic dyes with cationic properties. Such modifications are useful towards developing the potential adsorbents for various pollutants in the future from waste resources.In chapter 3, the cellulosic network was prepared by crosslinking hydroxyl group of cellulose backbone and amino group of the polyethyleneimine molecules via glutar aldehyde crosslinker. The detailed structural characterization, comparison of properties of both unmodified and modified fibers were discussed. Incorporation of amino groups resulted in different physicochemical properties and mechanical strength of the fibers. Such functionalization not only facilitated the extraction of multiple pollutants with different structural and chemical properties but also significantly enhanced the recyclability. Furthermore, the amount adsorbed onto the synthesized adsorbent (PEI/CE) was much higher than the related reported systems. This chapter offers a simple synthetic strategy for the development of scalable, biocompatible, and recyclable systems which could be useful for the removal of several pollutants simultaneously.More importantly, the amino-functionalized cellulose fibers helped to extract the smaller sized (≤100 nm) plastic particulates efficiently (Chapter 4, ≥98 %). The detailed quantitative analysis and characterization of the adsorbent before and after polymer particles removal was also provided.
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