Author: Casey ChingPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Towards a Mechanistic Understanding of Development and Design of Cyclodextrin Polymers as Emerging Adsorbents to Remove Per- and Polyfluoroalkyl Substances from Water
Exploring the Factors that Determine the Adsorption of Per- and Polyfluoroalkyl Substances on Conventional Adsorbents and Novel Cyclodextrin Polymers with Different Surface Properties
Author: Ri WangPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
As the concerns over the ubiquity and toxicity of per- and polyfluoroalkyl substances (PFASs) grow, research has focused on finding both technically and financially efficient PFAS remediation technologies. When evaluating certain technologies, research has focused on the removal of perfluoroalkyl acids from water, but contaminated groundwater often contains complex mixtures of diverse groups of PFASs. Utilizing a more comprehensive method to evaluate the performance of different PFAS treatment technologies involving the consideration of environmental matrix complexity can bring more useful insights into practical application. Adsorption-based processes are among the most promising technologies available for PFAS removal from water. The conventional adsorbents including activated carbon (AC) and anion exchange (AE) resins have been implemented in pilot or full-scale processes targeting PFAS removal from water. Emerging adsorbents, including novel β-cyclodextrin polymers (CDPs), have also exhibited potential for PFAS removal from water. The efficacy of CDPs on PFAS removal and the importance of varying surface properties of different CDPs on determining the affinity and selectivity to contaminants have been demonstrated. However, the mechanisms by which adsorbates bind to CDPs remains poorly understood. More research is needed to elucidate the mechanisms about the relative contributions of hydrophobic and electrostatic interactions for the adsorption of PFASs on CDPs.Two studies were designed to systematically explore the potential of conventional adsorbents and novel CDPs to remove mixtures of PFASs from contaminated groundwater and probe the adsorption binding mechanisms for anionic PFAS removal on CDPs. The first study aimed to evaluate the performance of five adsorbents including one AC, one AE resin and three different CDPs with varying surface charges to remove 68 PFASs in contaminated groundwater integrating a suspect screening approach. The PFAS removal performance of the adsorbents was evaluated with respect to adsorption affinity, kinetics, and selectivity. This evaluation provided insights on the factors that determine PFASs adsorption, which can be associated with the increasing length of the perfluorinated tail or could be more strongly related to properties of the head group. The second study aimed to evaluate the relative contributions of hydrophobic and electrostatic interactions on the adsorption of anionic PFASs by CDPs under controlled experimental conditions in nanopure water and different salt-amended nanopure water matrices. This study provided new insights into the adsorption binding mechanisms between anionic PFASs and CDPs as a function of chain length, and revealed the effects of different types and concentrations of inorganic constituents on the adsorption mechanisms. Together, the research described in this thesis furthers the understanding of different PFAS removal patterns by different adsorbents, and the understanding of anionic PFAS adsorption mechanisms on CDPs. These findings can serve as guidance and knowledge support on the future development and practical application of CDPs for different PFAS species under a range of environmental conditions.
Characterization and Evaluation of Cyclodextrin Polymers as Alternative Adsorbents to Activated Carbon for Micropollutant Removal During Water and Wastewater Treatment
Author: Yuhan LingInnovative Polymeric Adsorbents
Author: Kyoichi SaitoPublisher: Springer
ISBN: 9811085633
Category : Technology & Engineering
Languages : en
Pages : 193
Book Description
This book presents the reader with a story-based narrative of discovery and development of radiation-induced graft polymerization. The report presented here accomplishes this by relating the inspiring account of research and development based on long-term collaboration among a professor, an engineer, and an entrepreneur. Their goal, ultimately successful, was to come up with a method for grafting functional polymer chains onto existing trunk polymers. The desired outcome was to produce feasible forms for practical use as adsorbents such as porous hollow-fiber membranes, porous sheets, nonwoven fabrics, and fibers. Adsorbents that specifically and efficiently bind to target ions and molecules are essential for capturing uranium species in seawater and antibody drugs in biological fluids and for removing metal ions from ultrapure water and radioactive cesium ions from contaminated water. This unique volume, with its clearly written text and many illustrative figures and diagrams, demonstrates the advantages of the high-adsorption capacity and rate and the easy handling of new polymeric adsorbents over conventional adsorbents. The dynamic behavior of graft chains as described here is certain to appeal especially to chemists, physicists, and material scientists as well as to other readers with an interest in this valuable subject.
Natural Polymers–Based Green Adsorbents for Water Treatment
Author: Susheel KaliaPublisher: Elsevier
ISBN: 0128205423
Category : Technology & Engineering
Languages : en
Pages : 358
Book Description
Natural Polymers-Based Green Adsorbents for Water Treatment focuses on the recent development of novel polymeric adsorbents that are green and eco-friendly or biodegradable in nature. The book reviews the synthesis, properties and adsorption applications of natural and green polymer-based adsorbents. It discusses adsorption processes in biopolymer systems, remediation technologies developed to remove environmental pollutants, the usage of natural polymer-based cost-effective and green novel adsorbent materials for the removal of organic and inorganic contaminants, and the efficiency of functionalized polymers, nanosorbents, hydrogels, composites, graft copolymers in the sorption of various pollutants from the environment as well as from the industrial effluents. Researchers working on environmental remediation need a single book, where all data on natural and green adsorbents for water treatment are discussed comprehensively. Natural Polymers-Based Green Adsorbents for Water Treatment addresses this need by providing world-wide leading experts’ observations and research. So, this book is a valuable reference for early-career scientist, academic researchers and graduate students in chemical engineering and material science. Presents step-by-step review of processing and modification of natural polymers and their applications in water remediation Analyzes data on natural and green adsorbents for water treatment, meanwhile provides world-wide experts’ knowledge to pave the way for further research Includes extensive tables, graphs, figures, bibliographies and references to enhance key concepts
Developing Cost-effective Specialty Adsorbents to Meet Emerging Challenges of Pollutant Removal in Surface Water Systems
Author: Diana L. OrdonezPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The production of clean water is emphasized under the United Nations goals for sustainable development (SDGs), enlightening the acute need of developing new sustainable technologies in all disciplines. SDGs have urged all engineers in the 21st century to mitigate pollution of drinking water sources and prevent all receiving waterbodies from the impact of agriculture discharge, wastewater effluent, and stormwater runoff. Current water matrix constituents of concern include traditional pollutants (i.e., total nitrogen and total phosphate), natural organic matters (i.e., total organic carbon (TOC), tannic acid), heavy metals (i.e., copper, calcium), and harmful algae toxins (i.e., microcystin), as well as contaminants of emerging concern (i.e., Per- and polyfluoroalkyl substances (PFAS), pharmaceuticals, endocrine disrupting chemicals, personal care products). This study presents the most recent development of a suite of in situ cost-effective, scalable, and fit-for-purpose specialty adsorbents to simultaneously remove PFAS, TOC, total nitrogen, total phosphate, and microcystin through synergistic effect of different specialty ingredients. It is also aimed to clarify physiochemical removal mechanisms for the removal of color (tannic acid), nutrients (phosphate and nitrate), contaminants of emerging concern (PFAS) and algal toxins (Microcystin LR). The originality of these specialty adsorbents with chemical, molecular, and even microbial insights falls within the sustainable nature of specialty ingredients and wide availability tailored for scalable applications in any landscape.
DEVELOPMENT OF NOVEL ADSORBENTS FOR THE REMOVAL OF EMERGING CONTAMINANTS FROM WATER AND WASTEWATER
Author: Bikash BhattaraiDevelopment of Novel Adsorbents for the Removal of Emerging Contaminants from Water
Author: Bikash BhattaraiTuning Host-guest Chemistry in the Development of Adsorbents for Remediation of Organic Pollutants
Author: leilei xiaoCyclodextrin Chemistry
Author: Zheng-Yu JinPublisher: World Scientific
ISBN: 9814436801
Category : Science
Languages : en
Pages : 290
Book Description
Cyclodextrin Chemistry covers the preparation of cyclodextrins and cyclodextrin derivatives (CDs), and their applications in industrial and non-industrial areas. An overall theme in the book is the screening of cyclodextrin glycosyltransferase (CGTase), the preparation of sugar-branched cyclodextrins and CDs, and the use of CDs for reconstructing various supermolecule systems. The specific content also includes preparation methods, spectroscopy techniques for CDs analysis, and potential applications in food packaging, nutrient fortification, medicine, cosmetics, textiles, chemicals, feed, agriculture, and environment. It summarizes the research merit of CDs in the past twenty years and also emphasizes hot topics and important areas of cyclodextrin chemistry in the future. Contents: Introduction (Jun-Rong Huang, Hai-Ning Zhuang and Zheng-Yu Jin); Enzymes in Preparing Cyclodextrins (Sheng-Jun Wu, Xiu-Ting Hu, Jin-Moon Kim and Jing Chen); Preparation and Analysis of Cyclodextrin (An-Wei Cheng, Jin-Peng Wang and Zheng-Yu Jin); Preparation of Branched-Cyclodextrins (Xing Zhou, Yao-Qi Tian and Zheng-Yu Jin); Preparation and Analysis of Cyclodextrin Derivatives (Chao Yuan, Yu-Xiang Bai and Zheng-Yu Jin); Basic Application of Cyclodextrins in Supermolecule Chemistry (Tao Feng, Ai-Quan Jiao and Zheng-Yu Jin); Use of Cyclodextrins in Food, Pharmaceutical and Cosmetic Industries (Yao-Qi Tian, Xing Zhou and Zheng-Yu Jin); Application of Cyclodextrins in Non-industrial Areas (Xue-Hong Li and Zheng-Yu Jin). Readership: Researchers and technicians in food, pharmaceutical, cosmetic and chemical industries, as well as in non-industry areas such as agriculture and environmental engineering, supermolecule and analytical chemistry.