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Functional Capsules Encapsulating Molecular-Recognizable Nanogels for Facile Removal of Organic Micro-Pollutants Article

Wen-Ying Liu, Xiao-Jie Ju, Xing-Qun Pu, Quan-Wei Cai, Yu-Qiong Liu, Zhuang Liu, Wei Wang, Rui Xie, Liang-Yin Chu

Engineering 2021, Volume 7, Issue 5,   Pages 636-646 doi: 10.1016/j.eng.2021.02.007

Abstract:

A novel method has been successfully developed for the facile and efficient removal of organic micropollutants (OMP) from water based on novel functional capsules encapsulating molecular-recognizable nanogels. The functional capsules are composed of ultrathin calcium alginate (Ca-Alg) hydrogel shells as semipermeable membranes and encapsulated poly(N-isopropylacrylamide-co-acrylic acid-g-mono-
(6-ethanediamine-6-deoxy)-β-cyclodextrin) (PNCD) nanogels with β-cyclodextrin (CD) moieties as OMP capturers. The semipermeable membranes of the capsules enable the free transfer of OMP and water molecules across the capsule shells, but confine the encapsulated PNCD nanogels within the capsules. Bisphenol A (BPA), an endocrine-disrupting chemical that is released from many plastic water containers, was chosen as a model OMP molecule in this study. Based on the host–guest recognition complexation, the CD moieties in the PNCD nanogels can efficiently capture BPA molecules. Thus, the facile and efficient removal of BPA from water can be achieved by immersing the proposed functional capsules into BPAcontaining aqueous solutions and then simply removing them, which is easily done due to the capsules’ characteristically large size of up to several millimeters. The kinetics of adsorption of BPA molecules by the capsules is well described by a pseudo-second-order kinetic model, and the isothermal adsorption thermodynamics align well with the Freundlich and Langmuir isothermal adsorption models. The regeneration of capsules can be achieved simply by washing them with water at temperatures above the volume phase transition temperature of the PNCD nanogels. Thus, the proposed functional capsules encapsulating molecular-recognizable nanogels provide a novel strategy for the facile and efficient removal of OMP from water.

Keywords： Functional capsules     Molecular-recognizable nanogels     Organic micro-pollutants     Host–guest complexation    

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Research on the Strategies for Safe Management of Drinking Water in the Yangtze River Delta

Chu Wenhai , Yang Xu , Xiao Rong , Jin Wei

Strategic Study of CAE 2022, Volume 24, Issue 5,   Pages 19-25 doi: 10.15302/J-SSCAE-2022.05.003

Abstract:

The safety of drinking water is related to the national economy and the people's livelihood. The Chinese government has always attached great importance to the safety guarantee of drinking water. Since the reform and opening up, in the Yangtze River Delta area with active economic development and high population density, water environmental pollution has brought great challenges to the safety of drinking water. After more than ten years of development, the overall level of drinking water safety assurance in the Yangtze River Delta region has been significantly improved, which has effectively promoted the coordinated and sustainable development of the region. However, the people's requirements for water quality safety and health are also gradually improving, and the drinking water safety assurance work of the Yangtze River Delta Megalopolis is still facing many challenges. This article takes the typical source water quality in the Yangtze Delta region as a starting point for further analysis, and summarized the achievement of urban drinking water safety assurance of this area. The current situation of further improving drinking water quality was analyzed from the two dimensions of management and technology, as well as the three aspects of water source, water plant and pipe network (secondary water supply). On this basis, several suggestion and strategies has been proposed, which includes improving the ecological compensation mechanism, collaboratively revising the water environment quality standards, developing green and efficient water treatment technologies, and innovating the water supply management model. These strategies can give reference for the safety of drinking water in the Yangtze Delta and the development of regional integration.

Keywords： drinking water     Yangtze Delta     safety guarantee     micro-pollutants     emerging contaminants     green development    

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Multiple Pollutants from Crop and Livestock Production in the Yangtze River: Status and Challenges

Frontiers of Agricultural Science and Engineering doi: 10.15302/J-FASE-2023511

Abstract:

● Cash crops and livestock production in Yangtze River Basin has grown rapidly.

Keywords： Agriculture Green Development     crop production     livestock production     multi-pollutant models     multiple pollutants    

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The R&D of Flue Gas Pollutants Deep-Removal Technology for Coal-fired Power Plants

Xiao-lu Zhang

Frontiers of Engineering Management 2015, Volume 2, Issue 4,   Pages 359-363 doi: 10.15302/J-FEM-2015057

Abstract: The flue gas pollutants deep-removal technology (DRT) focusing on PM removal is the prime method offurther reducing pollutants emission from coal-fired power plants.

Keywords： coal-fired power plant     pollutants emission reduction     PM2.5     flue gas pollutants     deep-removal    

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Multimedia distribution and health risk assessment of typical organic pollutants in a retired industrial

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1742-9

Abstract:

● A fine portrayal of organic pollutants in a retired industrial park

Keywords： Organic pollutants     Retired industrial park     Spatial correlation     Health risk assessment    

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Characteristics of pollutants behavior in a stormwater constructed wetland during dry days

Jianghua YU, Kisoo PARK, Youngchul KIM

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 649-657 doi: 10.1007/s11783-012-0426-7

Abstract: A stormwater wetland treating non-point source pollution (NPS) from a 64 ha agricultural watershed was monitored over a period of five months. The results indicated that pH and dissolved oxygen (DO) were increased in the wetland due to the algal growth. The highest total suspended solids (TSS) concentration was observed in the aeration pond due to the resuspension of solids, decreased in the wetland. The respective decreases in total nitrogen (TN) and total kjeldahl nitrogen (TKN) were 15.9% and 28.7% on passing through the wetland. The nitrate and ammonia were increased by 45.4% and decreased by 79.9%, respectively. These variations provided strong evidence for the existence of nitrification. The total phosphorus (TP) and phosphate had respective reductions of 52.3% and 58.2% over the wetland. The total chemical oxygen demand (TCOD) and soluble chemical oxygen demand (SCOD) were also decreased. Generally, the TN, TP and phosphate removal efficiencies were positive. These positive removal efficiencies were mainly due to microbial activities, uptake by plants, and chemical precipitation at high pH. Negative removal efficiencies can be caused by continuous rainfall activities, with short antecedent dry days (ADDs) and unstable hydraulic conditions, some other biogeochemical transformations and algal growth also being important parameters.

Keywords： constructed stormwater wetland     dry days     nitrification and denitrification     pollutants characteristic    

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Flexible micro flow sensor for micro aerial vehicles

Rong ZHU, Ruiyi QUE, Peng LIU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 4,   Pages 539-545 doi: 10.1007/s11465-017-0427-0

Abstract:

This article summarizes our studies on micro flow sensors fabricated on a flexible polyimide circuitThe micro flow sensor has merits of flexibility, structural simplicity, easy integrability with circuitsIn our study, we install the fabricated micro flow sensors on micro aerial vehicles (MAVs) to detect

Keywords： micro flow sensor     flexible sensor     surface flow sensing     aerodynamic parameter     micro aerial vehicle (MAV    

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Immobilization of laccase on organic–inorganic nanocomposites and its application in the removal of phenolic pollutants

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7,   Pages 867-879 doi: 10.1007/s11705-022-2277-5

Abstract: Immobilized laccase demonstrated excellent removal of phenolic pollutants (2,4-dichlorophenol, bisphenolthe immobilized laccase of this work may provide a practical application for the removal of phenolic pollutants

Keywords： polydopamine     pollutant removal     thermodynamic     phenolic pollutants     immobilized laccase    

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Analysis of Flue Gas Pollutants Deep-removal Technology in Coal-fired Power Plants

Xiao-lu Zhang

Frontiers of Engineering Management 2014, Volume 1, Issue 4,   Pages 336-340 doi: 10.15302/J-FEM-2014061

Abstract: Developing Flue Gas Pollutant Deep-removal Technology (DRT) for coal-fired power plants for deep-removing pollutants

Keywords： Coal-fired power plant     flue gas pollutants     deep-removal     PM2.5 removal    

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oxyiodide with highly exposed (110) facets on curved carbon nitride for the photocatalytic degradation of pollutants

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7,   Pages 1125-1138 doi: 10.1007/s11705-021-2116-0

Abstract: abundant oxygen vacancies were successfully designed to enhance the photocatalytic degradation of organic pollutants

Keywords： high-exposure (110) facet     oxygen vacancy-rich     BiOI-110/DCN heterojunction     photocatalytic degradation     visible-light-response    

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Beta-cyclodextrin adsorbents to remove water pollutants—a commentary

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 9,   Pages 1407-1423 doi: 10.1007/s11705-022-2146-2

Abstract: Beta-cyclodextrin-based adsorbent is a promising adsorbent because it has unique characteristics and able to form host-guest complexes with various organic compounds. Adsorption using beta-cyclodextrin-based adsorbent has continuously improved by various preparation strategies and crosslinking agents. This commentary aims to highlight the preparation strategies, properties, and adsorption mechanisms of beta-cyclodextrin-based adsorbents. The adsorbents can be generally classified according to the preparation methods and display high adsorption capacity especially for dyes. Particularly, composite/nanocomposite beta-cyclodextrin-based adsorbents exhibit outstanding adsorption capacity even though the surface area is lower than that of porous and magnetic beta-cyclodextrin-based adsorbents. The beta-cyclodextrin/chitosan functionalized graphene oxide hydrogel with specific surface of 17.6 m2·g–1 yields an extraordinarily maximum adsorption capacity of 1499 mg·g–1 methylene blue, while beta-cyclodextrin/chitosan modified with iron(II, III) oxide nanoparticles displays a much greater maximum adsorption capacity at 2780 mg·g–1. The hydrophobic interaction, functional groups, hydrogen bonding, and electrostatic interaction govern the adsorption to a greater capacity. Although this commentary is not exhaustive, the preparation strategies and illustrated mechanisms provide useful insights into the adsorbent–adsorbate interactions, cost-effective analysis, challenges, and future directions of beta-cyclodextrin-based adsorbents in wastewater treatment.

Keywords： beta-cyclodextrin adsorbent     adsorption     inclusion complex     mechanism     water pollutant     wastewater treatment    

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Catalytic reduction of water pollutants: knowledge gaps, lessons learned, and new opportunities

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 2, doi: 10.1007/s11783-023-1626-z

Abstract:

● Advances, challenges, and opportunities for catalytic water pollutant reduction.

Keywords： Molybdenum     Rhenium     Rhodium     Ruthenium     Catalyst Support     Bromate    

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Dependence of error sensitivity of frequency on bias voltage in force-balanced micro accelerometer

Lili CHEN, Wu ZHOU

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 146-149 doi: 10.1007/s11465-013-0260-z

Abstract:

To predict more precisely the frequency of force-balanced micro accelerometer with different biasBased on the theoretical results, micro accelerometer is fabricated and tested to study the influences

Keywords： Micro-Electro-Mechanical Systems (MEMS)     micro accelerometer     force-balanced micro accelerometer     frequency    

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Analysis of flue gas pollutants deep-removal technology for coal-fired power plant

Zhang Xiaolu

Strategic Study of CAE 2014, Volume 16, Issue 10,   Pages 47-51

Abstract: flue gas pollutant control technology is difficult to remove PM2.5, the development of the Flue Gas PollutantsTechnology (DRT) for Coal-fired Power Plant for deep-removing PM2.5, SO2, SO3, heavy metals and other pollutants

Keywords： coal-fired power plant     flue gas pollutants     deep-removal     PM2.5 removal    

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Effects of a diesel oxidation catalyst on gaseous pollutants and fine particles from an engine operating

Xiaoyan SHI, Kebin HE, Weiwei SONG, Xingtong WANG, Jihua TAN

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4,   Pages 463-469 doi: 10.1007/s11783-011-0317-3

Abstract: The effects of a diesel oxidation catalytic (DOC) converter on diesel engine emissions were investigated on a diesel bench at various loads for two steady-state speeds using diesel fuel and B20. The DOC was very effective in hydrocarbon (HC) and CO oxidation. Approximately 90%–95% reduction in CO and 36%–70% reduction in HC were realized using the DOC. Special attention was focused on the effects of the DOC on elemental carbon (EC) and organic carbon (OC) fractions in fine particles (PM ) emitted from the diesel engine. The carbonaceous compositions of PM were analyzed by the method of thermal/optical reflectance (TOR). The results showed that total carbon (TC), OC and EC emissions for PM from diesel fuel were generally reduced by the DOC. For diesel fuel, TC emissions decreased 22%–32% after the DOC depending on operating modes. The decrease in TC was attributed to 35%–97% decrease in OC and 3%–65% decrease in EC emissions. At low load, a significant increase in the OC/EC ratio of PM was observed after the DOC. The effect of the DOC on the carbonaceous compositions in PM from B20 showed different trends compared to diesel fuel. At low load, a slight increase in EC emissions and a significant decrease in OC/EC ratio of PM after DOC were observed for B20.

Keywords： diesel oxidation catalyst (DOC)     diesel particulate matters     elemental carbon (EC)     organic carbon (OC)     biodiesel    

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Title Author Date Type Operation

Functional Capsules Encapsulating Molecular-Recognizable Nanogels for Facile Removal of Organic Micro-Pollutants

Wen-Ying Liu, Xiao-Jie Ju, Xing-Qun Pu, Quan-Wei Cai, Yu-Qiong Liu, Zhuang Liu, Wei Wang, Rui Xie, Liang-Yin Chu

Journal Article

Research on the Strategies for Safe Management of Drinking Water in the Yangtze River Delta

Chu Wenhai , Yang Xu , Xiao Rong , Jin Wei

Journal Article

Multiple Pollutants from Crop and Livestock Production in the Yangtze River: Status and Challenges

Journal Article

The R&D of Flue Gas Pollutants Deep-Removal Technology for Coal-fired Power Plants

Xiao-lu Zhang

Journal Article

Multimedia distribution and health risk assessment of typical organic pollutants in a retired industrial

Journal Article

Characteristics of pollutants behavior in a stormwater constructed wetland during dry days

Jianghua YU, Kisoo PARK, Youngchul KIM

Journal Article

Flexible micro flow sensor for micro aerial vehicles

Rong ZHU, Ruiyi QUE, Peng LIU

Journal Article

Immobilization of laccase on organic–inorganic nanocomposites and its application in the removal of phenolic pollutants

Journal Article

Analysis of Flue Gas Pollutants Deep-removal Technology in Coal-fired Power Plants

Xiao-lu Zhang

Journal Article

oxyiodide with highly exposed (110) facets on curved carbon nitride for the photocatalytic degradation of pollutants

Journal Article

Beta-cyclodextrin adsorbents to remove water pollutants—a commentary

Journal Article

Catalytic reduction of water pollutants: knowledge gaps, lessons learned, and new opportunities

Journal Article

Dependence of error sensitivity of frequency on bias voltage in force-balanced micro accelerometer

Lili CHEN, Wu ZHOU

Journal Article

Analysis of flue gas pollutants deep-removal technology for coal-fired power plant

Zhang Xiaolu

Journal Article

Effects of a diesel oxidation catalyst on gaseous pollutants and fine particles from an engine operating

Xiaoyan SHI, Kebin HE, Weiwei SONG, Xingtong WANG, Jihua TAN

Journal Article