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Current scenario and challenges of plastic pollution in Bangladesh: a focus on farmlands and terrestrial

《环境科学与工程前沿（英文）》 2023年 第17卷 第6期 doi: 10.1007/s11783-023-1666-4

摘要：

● A global snapshot of plastic waste generation and disposal is analysed.

关键词： Plastic waste     Farmlands     Terrestrial ecosystem     Marine life    

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Microplastics pollution and reduction strategies

Wei-Min Wu,Jun Yang,Craig S. Criddle

《环境科学与工程前沿（英文）》 2017年 第11卷 第1期 doi: 10.1007/s11783-017-0897-7

摘要： Microplastic particles smaller than 5 mm in size are of increasing concern, especially in aquatic environments, such as the ocean. Primary source is microbeads (<1 mm) used in cosmetics and cleaning agents and fiber fragments from washing of clothes, and secondary source such as broken down plastic litter and debris. These particles are mostly made from polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET) and polyesters. They are ingested by diverse marine fauna, including zooplanktons, mussel, oyster, shrimp, fish etc. and can enter human food chains via several pathways. Strategy for control of microplastics pollution should primarily focus on source reduction and subsequently on the development of cost-effective clean up and remediation technologies. Recent research results on biodegradation of plastics have revealed a potential for microbial biodegradation and bioremediation of plastic pollutants, such as PE, PS and PET under appropriate conditions.

关键词： microplastics     plastic microbeads     environmental pollution     biodegradation    

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A critical review of the emerging research on the detection and assessment of microplastics pollution

《环境科学与工程前沿（英文）》 2022年 第16卷 第10期 doi: 10.1007/s11783-022-1563-2

摘要：

● Coastal and marine regions are the most studied for microplastic pollution.

关键词： Plastic pollution     Waste management     Global south     Sustainability     Marine pollution    

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Sustainable Plasticulture in Chinese Agriculture: a Review of Challenges and Routes to Achieving Long-term Food and Ecosecurity

《农业科学与工程前沿（英文）》 doi: 10.15302/J-FASE-2023508

摘要：

● Macro-, micro- and nanoplastic pollution in agricultural soils threaten long-term crop production and environmental health in China.

关键词： circular plastics economy     crop production     food security     plastic pollution     sustainable plasticulture    

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我国废弃塑料污染防治战略研究

王琪,瞿金平,石碧,陈宁,聂敏,杨双桥

《中国工程科学》 2021年 第23卷 第1期   页码 160-166 doi: 10.15302/J-SSCAE-2021.01.020

摘要：

废弃塑料污染防治是国家战略的重要组成部分。本文全面深入分析我国废弃塑料的来源、回收利用及回收利用技术的现状。在塑料全生命周期评价基础上，提出了我国塑料污染防治全链条解决方案：在技术层面，必须从塑料合成、加工、应用和处理等各环节全方位全链条防治废弃塑料污染，包括塑料制品源头减量，塑料原料及替代产品的开发，塑料制品循环利用的设计，高性能长服役期塑料制品的加工，废弃塑料清洁高效规模化回收利用，终极塑料垃圾的安全处理等；在政府层面，建议加强政府政策引导，落实行政监管；在企业层面，建立有效回收机制，明确生产者、经营者、消费者的回收责任，为废弃塑料污染防治提供政策及技术建议；在公众层面，提高公民环保意识，全民参与治理。采用上述提出的我国塑料污染防治全链条解决方案，可以促进我国塑料工业和国民经济绿色可持续发展。

关键词： 废弃塑料     环境污染     防治措施     回收利用     全链条治理    

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Resource utilization of typical biomass wastes as biochars in removing plasticizer diethyl phthalate from water: characterization and adsorption mechanisms

《环境科学与工程前沿（英文）》 2023年 第17卷 第1期 doi: 10.1007/s11783-023-1605-4

摘要：

● Six largely produced agricultural biomass wastes were pyrolyzed into biochars.

关键词： Plastic pollution     Phthalic acid esters     Designed biochar     Wetland plant     Adsorption    

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农用地膜污染防治战略研究

许咏梅, 房世杰, 马晓鹏, 朱倩倩

《中国工程科学》 2018年 第20卷 第5期   页码 96-102 doi: 10.15302/J-SSCAE-2018.05.015

摘要：

本文在分析我国农用地膜覆盖面积与使用量逐年加大、使用区域由西部向东部急速扩张特征的基础上，探讨了残膜污染态势、残膜造成的土壤理化性质恶化程度以及生态环境恶化风险。从普通聚乙烯地膜降解难且产品质量标准不达标、地膜回收困难再利用效率低、可降解地膜工艺不成熟、尚无可替代产品以及地膜污染缺乏监管机制四个方面梳理了地膜污染的成因。在此基础上，提出了加强地膜标准化生产控制，严格执行地膜厚度≥0.01 mm 的国家标准；优化地膜田间科学合理使用，开展作物适时揭膜技术推广；改进提高残膜回收机效能，努力实现地膜零残留；加大可降解地膜研发力度，推广可降解地膜田间应用的农用地膜防治战略，为我国农用地膜合理利用提供参考。

关键词： 农用地膜     污染态势     防治战略措施    

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Moving policy and regulation forward for single-use plastic alternatives

《环境科学与工程前沿（英文）》 2021年 第15卷 第3期 doi: 10.1007/s11783-021-1423-5

摘要： Single-use plastics are often used once or cannot be reused for extended periods. They are widely consumed with the rapid development of social economy. The waste generated by single-use plastics threatens ecosystem health by entering the environment and ultimately restricts sustainable human development. The innovation of sustainable and environmentally friendly single-use plastic alternative materials and the joint participation of governments, enterprises and the public are promising technologies and management approaches that can solve the problem of single-use plastics wastes. The development of single-use plastic alternative products can be promoted fundamentally only by improving relevant legislation and standards, providing differentiated industrial policies, encouraging scientific and technological innovation and expanding public participation.

关键词： Single-use plastic alternatives     Policy     Regulation     Sustainable development    

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广义塑性力学及其运用

郑颖人,孔亮

《中国工程科学》 2005年 第7卷 第11期   页码 21-36

摘要：

分析了经典塑性力学用于岩土类材料的问题，它采用了3个不符合岩土材料变形机制的假设。从固体力学原理直接导出广义塑性位势理论，将经典塑性力学改造为更一般的塑性力学——广义塑性力学。广义塑性力学采用了塑性力学中的分量理论，能反映应力路径转折的影响，并避免了采用正交流动法则所引起的过大剪胀等不合理现象，也不会产生当前非关联流动法则中任意假定塑性势面引起的误差。给出了广义塑性力学的屈服面理论、硬化定律和应力-应变关系，并建立了考虑应力主轴旋转的广义塑性位势理论。屈服条件是状态参数，也是试验参数，只能由试验给出。应用表明，广义塑性力学可作为岩土材料的建模理论，还可应用于诸如极限分析等土力学的诸多领域，具有广阔的应用前景。

关键词： 岩土塑性力学     广义塑性力学     塑性势     屈服面     本构模型    

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Effects of natural zeolite and sulfate ions on the mechanical properties and microstructure of plastic

《结构与土木工程前沿（英文）》 2022年 第16卷 第1期   页码 86-98 doi: 10.1007/s11709-021-0793-x

摘要： One of the strategic materials used in earth-fill embankment dams and in modifying and preventing groundwater flow is plastic concrete (PlC). PlC is comprised of aggregates, water, cement, and bentonite. Natural zeolite (NZ) is a relatively abundant mineral resource and in this research, the microstructure, unconfined strength, triaxial behavior, and permeability of PlC made with 0%, 10%, 15%, 20%, and 25% replacement of cement by NZ were studied. Specimens of PIC-NZ were subjected to confined conditions and three different confining pressures of 200, 350, and 500 kPa were used to investigate their mechanical behavior and permeability. To study the effect of sulfate ions on the properties of PlC-NZ specimens, the specimens were cured in one of two different environments: normal condition and in the presence of sulfate ions. Results showed that increasing the zeolite content decreases the unconfined strength, elastic modulus, and peak strength of PlC-NZ specimens at the early ages of curing. However, at the later ages, increasing the zeolite content increases unconfined strength as well as the peak strength and elastic modulus. Specimens cured in the presence of sulfate ions indicated lower permeability, higher unconfined strength, elastic modulus, and peak strength due to having lower porosity.

关键词： plastic concrete     sulfate resistance     natural zeolite     triaxial compression test     SEM     permeability    

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Preventing masks from becoming the next plastic problem

《环境科学与工程前沿（英文）》 2021年 第15卷 第6期 doi: 10.1007/s11783-021-1413-7

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The road to sustainable use and waste management of plastics in Portugal

《环境科学与工程前沿（英文）》 2022年 第16卷 第1期   页码 5-5 doi: 10.1007/s11783-021-1439-x

摘要：

• Portugal recycles 34% of the 40 kg/hab year of plastic packaging waste.

关键词： Single-use plastics     Plastic packaging     Plastic waste     Waste management     Waste shipment     Lightweight plastic bags    

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Effect of RC wall on the development of plastic rotation in the beams of RC frame structures

Amar KAHIL, Aghiles NEKMOUCHE, Said BOUKAIS, Mohand HAMIZI, Naceur Eddine HANNACHI

《结构与土木工程前沿（英文）》 2018年 第12卷 第3期   页码 318-330 doi: 10.1007/s11709-017-0420-z

摘要：

The objective of this study is, to interpret the influence of reinforced concrete walls addition in reinforced concrete frame structures considering behavior laws that reflects the actual behavior of such structures, by means of Castem2000computer code (pushover analysis). A finite element model is proposed in this study, using the TAKEDA modified behavior model with Timoshenko beams elements. This model is validated initially on experimental model. Then the work has focused on the behavior of a RC frame with 3 levels and three bays to better visualize the behavior of plastic hinges. Once the plastic hinge control parameters are identified (plastic rotation, ultimate curvature), a strengthening by introduction of reinforced concrete walls (RC/wall) at the ends of the reinforced concrete frame (RC/frame) has been performed. The results show that these RC walls significantly improve the behavior, by a relocation of efforts towards the central part of the beams.

关键词： RC/frame     RC/wall     moment curvature     plastic rotation     plastic hinge     pushover analysis     global models    

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Influence of recycled polyethylene terephthalate fibres on plastic shrinkage and mechanical properties

Necat ÖZAŞIK; Özgür EREN

《结构与土木工程前沿（英文）》 2022年 第16卷 第6期   页码 792-802 doi: 10.1007/s11709-022-0849-6

摘要： Polyethylene terephthalate bottles production has drastically increased year after year due to high versatility of polyethylene terephthalate plastics and considerable consumption of beverages. In tandem with that increase, the major concern of society has been the improper disposal of this non-biodegradable material to the environment. To deal with this concern, recycled polyethylene terephthalate bottles were incorporated in concrete as fibre reinforcements in this study. The objective of this research is to evaluate the mechanical properties of recycled polyethylene terephthalate fibre reinforced concrete (RPFRC) in comparison with control concrete without fibres. polyethylene terephthalate fibres with three different diameters (0.45, 0.65, and 1.0 mm) and two lengths (20 and 30 mm) were added at various proportions (0.5%, 1.0%, 1.5% and 2.0%) by volume of concrete in order to determine the effect of fibres initially on compressive, flexural and splitting tensile strengths of concrete. The results revealed that none of the fibres have detrimental effects up to 1% volume fraction, however further addition caused slight reductions on mechanical properties in some conditions. Plastic shrinkage resistance and impact resistance tests were also performed according to related standards. Polyethylene terephthalate fibres were observed to have marked improvements on those properties. Such a good performance could be attributed primarily to the bridging effect of fibres.

关键词： recycled PET     fibre-reinforced concrete     mechanical properties     plastic shrinkage     impact energy    

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标题 作者 时间 类型 操作

Current scenario and challenges of plastic pollution in Bangladesh: a focus on farmlands and terrestrial

期刊论文

Microplastics pollution and reduction strategies

Wei-Min Wu,Jun Yang,Craig S. Criddle

期刊论文

A critical review of the emerging research on the detection and assessment of microplastics pollution

期刊论文

Sustainable Plasticulture in Chinese Agriculture: a Review of Challenges and Routes to Achieving Long-term Food and Ecosecurity

期刊论文

我国废弃塑料污染防治战略研究

王琪,瞿金平,石碧,陈宁,聂敏,杨双桥

期刊论文

Resource utilization of typical biomass wastes as biochars in removing plasticizer diethyl phthalate from water: characterization and adsorption mechanisms

期刊论文

农用地膜污染防治战略研究

许咏梅, 房世杰, 马晓鹏, 朱倩倩

期刊论文

Moving policy and regulation forward for single-use plastic alternatives

期刊论文

广义塑性力学及其运用

郑颖人,孔亮

期刊论文

Effects of natural zeolite and sulfate ions on the mechanical properties and microstructure of plastic

期刊论文

陈学庚：塑料残膜污染治理技术新发展（2019年5月6日）

陈学庚(院士)

2021年01月27日

会议视频

Preventing masks from becoming the next plastic problem

期刊论文

The road to sustainable use and waste management of plastics in Portugal

期刊论文

Effect of RC wall on the development of plastic rotation in the beams of RC frame structures

Amar KAHIL, Aghiles NEKMOUCHE, Said BOUKAIS, Mohand HAMIZI, Naceur Eddine HANNACHI

期刊论文

Influence of recycled polyethylene terephthalate fibres on plastic shrinkage and mechanical properties

Necat ÖZAŞIK; Özgür EREN

期刊论文