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Thermal cracking of waste printed wiring boards for mechanical recycling by using residual steam preprocessing

Yao CHEN, Jinhui LI, Huabo DUAN, Zhishi WANG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 167-174 doi: 10.1007/s11783-011-0308-4

Abstract: A thermal-crack method using residual steam as the heating medium has been developed to pre-treat wastemechanical strength in order to improve the recovery rate of valuable materials in subsequent mechanical recyclingThe changes of the PWBs’ macro-mechanical properties were studied to evaluate thermal expansion impactsThe results showed that thermal cracking with steam at the temperature of 500 K can effectively attenuateThermal expansion can also facilitate the separation of copper from glass fiber by reducing peel resistance

Keywords： waste printed wiring board (PWB)     residue steam     thermal-crack     mechanical properties    

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Copper fractal growth during recycling from waste printed circuit boards by slurry electrolysis

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1405-7

Abstract:

• Copper fractal growth was observed during WPCBs recycling by slurry

Keywords： Dendritic copper     Fractal growth     WPCBs     Slurry electrolysis    

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EXPLORING THE RECYCLING OF MANURE FROM URBAN LIVESTOCK FARMS: A CASE STUDY IN ETHIOPIA

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1,

Abstract: intensification, and (4) improved technology, on food-protein self-sufficiency, manure nitrogen (N) recycling

Costs of waste recycling were high and indicate the need for government incentives.

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Assessing the potential of crop residue recycling in China and technology options based on a bottom-up

Lili QU,Tianzhu ZHANG,Wei LU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 4,   Pages 570-579 doi: 10.1007/s11783-013-0604-2

Abstract: analysis method, and the constraint optimization method to establish the potential of crop residue recyclingpotential and selecting key crop residue recycling technologies for operation between 2010 and 2030.Market mechanisms are also improving the development of the crop residue recycling industry.The economic benefit of crop residue recycling is expected to be worth 132 billion CNY in 2030 accordingKey crop residue recycling technologies preferred such as liquefaction, amination, silo, co-firing straw

Keywords： China     crop residue     recycling potential     technology options    

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Benzene removal by nano magnetic particles under continuous condition from aqueous solutions

Amin Mohammad Mehdi,Bina Bijan,Majd Amir Masoud Samani,Pourzamani Hamidreza

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 3,   Pages 345-356 doi: 10.1007/s11783-013-0574-4

Abstract: Benzene removal from aqueous solutions was evaluated using Fe O nano magnetic particles (NM) in continuous condition. A 4 factorial design including initial benzene concentration, NM dose, contact time and pH was investigated in 16 experiments (Taguchi OA design). The results indicated that all factors were significant and the optimum condition was: pH 8, NM dose of 2000 mg·L , benzene concentrations of 100 mg·L and contact time of 14 min. The maximum benzene uptake and distribution ratio in the optimum situation were 49.4 mg·g and 38.4 L·g , respectively. The nano particles were shown to capture 98.7% of the benzene in optimum batch condition and 94.5% in continuous condition. The isotherm data proved that the Brunauer-Emmett-Teller model fit more closely and produced an isotherm constant (b) less than one, indicating favorable adsorption. Regeneration studies verified that the benzene adsorbed by the NM could be easily desorbed by temperature, and thereby, NM can be employed repeatedly in water and wastewater management.

Keywords： benzene     experimental design     Fe3O4     continues condition     thermal recycling    

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Resources Recycling

Qiu Dingfan

Strategic Study of CAE 2002, Volume 4, Issue 10,   Pages 31-35

Abstract: natural resources (minerals) unlimitedly, but make full use of them repeatedly and establish resources recyclingResources recycling is a kind of science that studies how to build the recycling system for making fullResources recycling is a law, and also an only road for human being living in harmony with nature andSocializing resources recycling as early as possible may completely solve the problems of resource shortageBuilding a society of resources recycling is a system engineering.

Keywords： resources     resources recycling     resources exploitation     society of resources recycling    

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Suggestions on Speeding up Recycling of Power Battery for New Energy Vehicles in China

Zhao Shijia,Xu Nan,Qiao Yingjun and Yang Bo

Strategic Study of CAE 2018, Volume 20, Issue 1,   Pages 144-148 doi: 10.15302/J-SSCAE-2018.01.021

Abstract: The ensuing battery recycling problem of the new energy vehicle has become a major issue.Power batteries without effective recycling will result in serious environmental pollution and a wasteThe United States, Germany, Japan, and other developed countries have planned for power battery recyclingAfter extensively analyzing the existing problems of power battery recycling, concrete suggestions for

Keywords： new energy vehicle     power battery     recycling    

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Thermal degradation characteristics and products obtained after pyrolysis of specific polymers found

Evangelia C. Vouvoudi, Aristea T. Rousi, Dimitris S. Achilias

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0996-5

Abstract: Modern societies strongly support the recycling practices over simple waste accumulation due to environmentalIn the framework of sustainable recycling of plastics from WEEE, pyrolysis is proposed here as a meansThe aim of this study was to investigate the thermal degradation and the products obtained after pyrolysisconclusion from this investigation is that pyrolysis could be an effective method for the sustainable recyclingchemicals with varying composition but being excellent to be used as fuel retrieved from secondary recycling

Keywords： Pyrolysis     WEEE recycling     ABS     HIPS     PC     Py-GC/MS     TGA    

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Optimal Timing and Recycling Operation Mode for Electro-Mechanical Products Active Remanufacturing

Wang Gao,Tao Li,Shi-tong Peng,Liang Wang,Hong-chao Zhang

Frontiers of Engineering Management 2016, Volume 3, Issue 2,   Pages 115-122 doi: 10.15302/J-FEM-2016019

Abstract: explores the economic efficiency and corresponding operation mode of electro-mechanical products when recycling

Keywords： electro-mechanical products     active remanufacturing     optimal timing     reverse logistics     recycling mode    

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Recycling Materials from Waste Electrical and Electronic Equipment

Jinhui Li

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-1001-z

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The Building of Papermaking Enterprise’s Recycling Economy Evaluation Index System Based on Value Flow

Zhi-fang Zhou,Jing Ou,Sha-sha Wang,Xiao-hong Chen

Frontiers of Engineering Management 2016, Volume 3, Issue 1,   Pages 9-17 doi: 10.15302/J-FEM-2016009

Abstract: At present, the research on circular economy has made a lot of substantive results both at home and abroad. But for the papermaking enterprise, which is the representative of the light industry, few studies have analyzed the evaluation index system of circular economy. Since the current material flow analyses have limitations that the researchers cannot calculate materials with different units. The authors take advantage of the intrinsic correlation between the basic principle of value flow analysis and circular economy, and then analyze the dynamic changes of material flow and value flow through enterprises internal production process. Considering the resource output, the authors set up the layered structure of the evaluation index system, and then preliminarily determine the index form. Next, the authors use the frequency statistics analysis method to adjust indicators, forming a preliminary index system. After that, the principal component analysis and independent analysis are applied for screening. Finally, the authors build a circular economy evaluation index system for papermaking enterprise to provide scientific guidance for the process of circular economy.

Keywords： circular economy     the papermaking enterprise     material flow analysis     value flow analysis     evaluation index system    

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Multi-Component Resource Recycling from Waste Light-Emitting Diode Under Hydrothermal Condition: Plastic

Yongliang Zhang,Lu Zhan,Zhenming Xu,

Engineering doi: 10.1016/j.eng.2023.04.008

Abstract: In previous studies, LED recycling focused on recovering precious and strategic metals while ignoringEnvironmental impact assessment revealed that the proposed recycling route for waste LED could significantlyFurthermore, this research provides a theoretical basis and a promising method for recycling other plastic-packaged

Keywords： Waste LED     Hydrothermal treatment     Recycling     Plastic PPA degradation     Packaging materials    

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Research on the key technologies of waste asphalt material recycling

Yang Linjiang

Strategic Study of CAE 2015, Volume 17, Issue 1,   Pages 56-61

Abstract: recycling technology， and analyzing the mechanism of asphalt?pavement aging and recycling， this essay proposed the technologies of recycling of waste asphalt mixturesIt also developed a set of effective technologies of hot recycling of asphalt pavement， to adapt to thepavement recycling， resources circulating and environment protecting in the current situation， which

Keywords： asphalt；pavement；waste material；recycling；hot?recycling?technology；reclaimed asphalt mixture    

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Region-gridding recycling of bulk organic waste: Emerging views based on coordinated urban and rural

Wenbing Tan, Dongyu Cui, Xiaohui Zhang, Beidou Xi

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1291-4

Abstract: The viewpoint proposes a region-gridding recycling management system of BOW that highlights the coordinatedtechnologies, promote the professionalization of farmers, and thus built the high-quality modern agricultural recycling

Keywords： Bulk organic waste     Recycling     Urban-rural coordination     Management system    

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A critical review on the recycling of copper and precious metals from waste printed circuit boards using

Zebing Wu, Wenyi Yuan, Jinhui Li, Xiaoyan Wang, Lili Liu, Jingwei Wang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0995-6

Abstract: electronic products are being generated due to their reduced life spans and the unavailability of suitable recyclingfurans, polybrominated organic pollutants, and polycyclic aromatic hydrocarbons, can be generated during thermalThis article reviews the recent trends and developments with regard to the recycling of precious metals

Keywords： Waste PCBs     Precious metals     Hydrometallurgy     Recycling     Leaching     Recovery    

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Title Author Date Type Operation

Thermal cracking of waste printed wiring boards for mechanical recycling by using residual steam preprocessing

Yao CHEN, Jinhui LI, Huabo DUAN, Zhishi WANG

Journal Article

Copper fractal growth during recycling from waste printed circuit boards by slurry electrolysis

Journal Article

EXPLORING THE RECYCLING OF MANURE FROM URBAN LIVESTOCK FARMS: A CASE STUDY IN ETHIOPIA

Journal Article

Assessing the potential of crop residue recycling in China and technology options based on a bottom-up

Lili QU,Tianzhu ZHANG,Wei LU

Journal Article

Benzene removal by nano magnetic particles under continuous condition from aqueous solutions

Amin Mohammad Mehdi,Bina Bijan,Majd Amir Masoud Samani,Pourzamani Hamidreza

Journal Article

Resources Recycling

Qiu Dingfan

Journal Article

Suggestions on Speeding up Recycling of Power Battery for New Energy Vehicles in China

Zhao Shijia,Xu Nan,Qiao Yingjun and Yang Bo

Journal Article

Thermal degradation characteristics and products obtained after pyrolysis of specific polymers found

Evangelia C. Vouvoudi, Aristea T. Rousi, Dimitris S. Achilias

Journal Article

Optimal Timing and Recycling Operation Mode for Electro-Mechanical Products Active Remanufacturing

Wang Gao,Tao Li,Shi-tong Peng,Liang Wang,Hong-chao Zhang

Journal Article

Recycling Materials from Waste Electrical and Electronic Equipment

Jinhui Li

Journal Article

The Building of Papermaking Enterprise’s Recycling Economy Evaluation Index System Based on Value Flow

Zhi-fang Zhou,Jing Ou,Sha-sha Wang,Xiao-hong Chen

Journal Article

Multi-Component Resource Recycling from Waste Light-Emitting Diode Under Hydrothermal Condition: Plastic

Yongliang Zhang,Lu Zhan,Zhenming Xu,

Journal Article

Research on the key technologies of waste asphalt material recycling

Yang Linjiang

Journal Article

Region-gridding recycling of bulk organic waste: Emerging views based on coordinated urban and rural

Wenbing Tan, Dongyu Cui, Xiaohui Zhang, Beidou Xi

Journal Article

A critical review on the recycling of copper and precious metals from waste printed circuit boards using

Zebing Wu, Wenyi Yuan, Jinhui Li, Xiaoyan Wang, Lili Liu, Jingwei Wang

Journal Article