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Jianbo Wang - One of the best experts on this subject based on the ideXlab platform.

  • identifying extraction technology of gold from solid waste in terms of Environmental Friendliness
    ACS Sustainable Chemistry & Engineering, 2019
    Co-Authors: Jianbo Wang
    Abstract:

    The demand for gold in the field of national storage, jewelry, and electronics has never been higher. However, gold extraction is not always welcomed by local residents because of the resulting Environmental contamination. For more than a century, cyanide and aqua reiga were dominantly used for gold mining because of their low costs, high efficiencies, and easy operations. In this article, an improved chlorination process, a traditional cyanidation process, and a traditional aqua regia process were quantitatively analyzed and compared from the perspective of Environmental impact. The Biwer-Heinzle method is employed. The results showed that the improved chlorination process had the lowest Environmental hazard. The values of General Environmental Indices computed for the Inputs and Outputs were quite small, closing to the minimum values of 0 and 1, respectively, depending on the calculation approach used, via arithmetic average or via multiplication. The results also revealed that the aqua regia process ha...

Honglou Ji - One of the best experts on this subject based on the ideXlab platform.

Lei Wang - One of the best experts on this subject based on the ideXlab platform.

  • superior green electrode materials for secondary batteries through the footprint family indicators to analyze their Environmental Friendliness
    Environmental Science and Pollution Research, 2019
    Co-Authors: Yuan Gong, Kai Huang, Lei Wang
    Abstract:

    As secondary batteries are becoming the popular production of industry, especial for lithium ion batteries (LIBs), the degree of Environmental Friendliness will gather increasing attention to their products of the whole life cycle. The research combines the life cycle assessment (LCA) and footprint family definition to establish a framework to calculate the footprint family of secondary battery materials. Through the method, we calculated the values of carbon footprint, water footprint, and ecological footprint about this eight kinds of secondary cathode battery materials with Ni-MH, Li1.2Ni0.2Mn0.6O2/C, LiNi1/3Co1/3Mn1/3O2/C, LiNi0.8Co0.2O2/C, LiFePO4/C, LiFe0.98Mn0.02PO4/C, FeF3(H2O)3/C, and NaFePO4/C. When comparing and analyzing their values in each footprint, it can summarize the evaluation method for some secondary batteries by footprint indicators and construct the evaluation system. Through the comprehensive evaluation of footprint family system, the NaFePO4/C battery gets the best performance of three main footprints when combining 1 kg of cathode materials, while Ni-MH is opposite. Hence, among these eight batteries Environmental impacts evaluation, the NaFePO4/C battery is regarded as the superior "green" battery, albeit the current application is restricted because of the synthesis limitation on large scale and energy density of storage. In LIBs comparison, the FeF3(H2O)3 material shows its characteristics of Environmental Friendliness, which is expected to be a greener battery material of LIB. In conventional LIBs, the iron-containing cathode materials show lower Environmental burden than ternary cathode materials. We can reduce Environmental impacts through developing new advanced materials and reducing the content of high sensitivity element in raw materials.

  • an efficient condensation of substituted salicylaldehyde and malononitrile catalyzed by lipase under microwave irradiation
    RSC Advances, 2015
    Co-Authors: Fengjuan Yang, Haoran Wang, Zhi Wang, Chunyu Wang, Lei Wang
    Abstract:

    The present work illustrates the condensation of substituted salicylaldehyde and malononitrile catalyzed by lipase under microwave irradiation. The reaction obtains two different products by a delicate control of the substrate molar ratio and reaction time. This protocol has the advantages of high yield, short reaction time and Environmental Friendliness.

  • a green and one pot synthesis of benzo g chromene derivatives through a multi component reaction catalyzed by lipase
    RSC Advances, 2015
    Co-Authors: Fengjuan Yang, Haoran Wang, Liyan Jiang, Hong Yue, Hong Zhang, Zhi Wang, Lei Wang
    Abstract:

    The synthesis of benzo[g]chromene derivatives through a multi-component reaction catalyzed by lipase is reported for the first time. This novel efficient method has the advantages of Environmental Friendliness, high yield and simple work-up. Moreover, this protocol extends the phenomenon of enzyme promiscuity.

Wenhu Dua - One of the best experts on this subject based on the ideXlab platform.

Manish Sharma - One of the best experts on this subject based on the ideXlab platform.

  • profitability and Environmental Friendliness of a closed loop supply chain for pet components a case study of the mexican automobile market
    Resources Conservation and Recycling, 2017
    Co-Authors: Ricardo Chavez, Manish Sharma
    Abstract:

    Abstract Each year, a high number of automobiles need to be disposed of in Mexico; leading to a high amount of automotive thermoplastic polymer waste. This situation makes Mexico an interesting country to deploy a closed-loop supply chain (CLSC) for the chemical recycling of this kind of waste. Despite being an interesting case, no study has been carried out until now evaluating the potential of a CLSC under the umbrella of the Mexican automobile market. This study is the first one that evaluates the profitability and Environmental Friendliness (energy consumed and CO2 generated) of a closed-loop supply chain (CLSC) for the chemical recycling　of Polyethylene terephthalate (PET) seats within the Mexican automobile market. The originality of this study also relies on being the first one that considers at the same time, the influence of Mexico’s current political, social, legal, and technological conditions on the CLSC’s profitability and Environmental Friendliness, as well as, on being the first that quantifies this influence in costs, CO2 footprint, and consumed energy terms. This approach allows the easy identification of the CLSC’s profitability and Environmental Friendliness key drivers; making possible the design of effective strategies to improve the CLSC’s performance. The study uses stakeholder mapping, as well as, Political, Economic, Social, Technological, Legal and Environmental Analysis (PESTLE) as data analysis tools. It shows that the studied CLSC is profitable under the umbrella of Mexico’s current infrastructure, political, and legal frameworks. Regarding Environmental Friendliness, the studied CLSC consumes 79% less energy and generates 73% less CO2 than those associated with the production of PET using a forward supply chain. Keeping in mind this study’s results, it provides evidence about CLSCs being both profitable and Environmentally friendly under the umbrella of emerging economies, such as Mexico.