环境科学与工程:B最新文献_第10页

Evaluation of Partial Sand Replacement by Coffee Husks in Concrete Production 咖啡壳在混凝土生产中部分替代砂的评价

环境科学与工程:B Pub Date : 2019-04-28 DOI: 10.17265/2162-5263/2019.04.001

Alan Carlos de Almeida, Matheus Alves Lima da Silva, Queren Cabral de Abreu, Adriana Lau da Silva Martins, S. Ribeiro, C. S. S. Pereira

{"title":"Evaluation of Partial Sand Replacement by Coffee Husks in Concrete Production","authors":"Alan Carlos de Almeida, Matheus Alves Lima da Silva, Queren Cabral de Abreu, Adriana Lau da Silva Martins, S. Ribeiro, C. S. S. Pereira","doi":"10.17265/2162-5263/2019.04.001","DOIUrl":"https://doi.org/10.17265/2162-5263/2019.04.001","url":null,"abstract":"Waste production in the industrial sector generates environmental impacts. Thus, it is necessary to search for means to reduce and reuse these residues. Brazil is the largest coffee producer and exporter worldwide, with this being one of the main products in the consumer market, at a production of 30 million sacks per year. Coffee production generates large amounts of by-products, such as husks. Therefore, the reuse of this residue is a good alternative for its disposal. In view of this fact, partial sand substitution by coffee husks in concrete production was evaluated, in order to reduce sand use in concrete manufacturing. For specimen production, traits were formulated by replacing sand by coffee husks at 5%. A 0.5:0.5:1:0.5 (gravel:sand:cement:water) ratio was considered for specimen preparation. To evaluate mechanical compressive strength, assays were performed after 7, 14, 21 and 28 days, using a hydraulic press with 80 MPa capacity. Partial sand substitution by the coffee residue was considered satisfactory, obtaining a compressive strength of ± 20 MPa, higher than the resistance obtained for the concrete produced without sand replacement. Coffee husk use did not compromise material resistance.","PeriodicalId":58493,"journal":{"name":"环境科学与工程:B","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42566197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Assessing Livelihood Vulnerability to Salinity Intrusion and Climate Variability A Case Study in Coastal Provinces of the Mekong River Delta of Vietnam 生计对盐度入侵和气候变率的脆弱性评估——以越南湄公河三角洲沿海省份为例

环境科学与工程:B Pub Date : 2019-04-28 DOI: 10.17265/2162-5263/2019.04.004

N. Can

引用次数: 3

Research on the Reliability Level of Backhoe Loaders 反铲装载机可靠性水平研究

环境科学与工程:B Pub Date : 2019-04-28 DOI: 10.17265/2162-5263/2019.04.002

Svetozar Madzhov

引用次数: 1

Environment and Bioeconomics: An Analysis of the Brazilian Ecosystem in Bioproducts Development 环境与生物经济学：巴西生物产品开发生态系统分析

环境科学与工程:B Pub Date : 2019-04-28 DOI: 10.17265/2162-5263/2019.04.005

T. A. Baptista, R. L. Grando, W. Jablonka, R. Angeli

{"title":"Environment and Bioeconomics: An Analysis of the Brazilian Ecosystem in Bioproducts Development","authors":"T. A. Baptista, R. L. Grando, W. Jablonka, R. Angeli","doi":"10.17265/2162-5263/2019.04.005","DOIUrl":"https://doi.org/10.17265/2162-5263/2019.04.005","url":null,"abstract":"This paper is part of an interdisciplinary and interinstitutional study involving biology, biotechnology and humanities researchers with the aim of examining the gaps as well as the opportunities that bioeconomics macrosegment offers to Brazil. For this, it adopted an action-research methodology based on interviews with stakeholders that work directly in the sector. Eighteen actors were contacted among researchers, experts and entrepreneurs, of which ten gave face-to-face interviews, with open questionnaires, semi-structured. From the analysis of these data, and from a vast theoretical framework, the article delimits biomass as a pillar of bioeconomics and points out the emerging trends of this science such as “green chemistry” and biotechnology. This is a field that condenses an important economic potential and a great capacity to develop mechanisms for the environment’s preservation. By analyzing the production chain and its interfaces, the article reveals that Brazil, although it has an undeniable capacity to emerge as a world protagonist in sustainable production, still lacks well-defined public policies that invest in innovation, in addition to the consumer culture’s transformation, production and economic development focused on non-renewable products.","PeriodicalId":58493,"journal":{"name":"环境科学与工程:B","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49639210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Collembola of North Forests of Iran, List of Genera and Species 标题伊朗北部森林的弹线虫属和种表

环境科学与工程:B Pub Date : 2019-04-28 DOI: 10.17265/2162-5263/2019.04.003

M. Shayanmehr, Elliyeh Yahyapour

引用次数: 2

Diagnosis of Machines in the Forestry Systems 林业系统中机器的诊断

环境科学与工程:B Pub Date : 2019-03-28 DOI: 10.17265/2162-5263/2019.03.003

Svetozar Madzhov

引用次数: 0

Vegetation Biomass of Sargassum Meadows in An Chan Coastal Waters, Phu Yen Province, Vietnam Derived from PlanetScope Image 来自PlanetScope图像的越南富颜省安禅沿海水域马尾藻草甸植被生物量

环境科学与工程:B Pub Date : 2019-03-28 DOI: 10.17265/2162-5263/2019.03.001

N. Hang, N. T. Hoa, T. Son, L. Nguyen-Ngoc

{"title":"Vegetation Biomass of Sargassum Meadows in An Chan Coastal Waters, Phu Yen Province, Vietnam Derived from PlanetScope Image","authors":"N. Hang, N. T. Hoa, T. Son, L. Nguyen-Ngoc","doi":"10.17265/2162-5263/2019.03.001","DOIUrl":"https://doi.org/10.17265/2162-5263/2019.03.001","url":null,"abstract":"SW (Seaweed) is a valuable coastal resource for its use in food, cosmetics, medicine and other items. In this study, PS (PlanetScope) imagery was combined with field sampling to demonstrate the capability of mapping of SAV (Submerge Aquatic Vegetation) (including both SW and SG (Seagrass) beds) and biomass mapping of Sargassum meadows in An Chan coastal waters, Tuy An district, Phu Yen province, Vietnam. In term of SAV and Sargassum mapping, authors proposed an improved remote sensing technique based on Sagawa’s BRI (Bottom Reflectance Index) algorithm with attention to Tassan’s concept in discrimination of light attenuation coefficient Kd between shallow and deep waters. Authors’ results showed high accuracy in mapping of SAV and Sargassum distribution with overall accuracy and Kappa coefficient of 92.52% and 0.8957, respectively. The classified class of SW (i.e. Sargassum sp.) then was separated absolutely from other classes in SAV map for estimation of Sargassum biomass. The red and green spectral pre-processed BRI channels (i.e. BRI3 and BRI2) of PS were used to estimate the Sargassum biomass using a multiple 2nd order polynomial regression model with very high accuracy (R = 0.9707; RMSE =  109.21 g/m). The average total Sargassum biomass was 897.8 g/m with total Sargassum yield in whole region reaching a value of 449.57 tons in cover area of 50.32 ha of Sargassum meadows. This result opens the great potential of biomass and yield estimation of Sargassum and other SW meadows in coastal waters (including enough optically deep waters) by remote sensing techniques based on PS imagery.","PeriodicalId":58493,"journal":{"name":"环境科学与工程:B","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44978964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Evaluation of Potency and Mineral Reserve Balance for Sustainable Mining Management Case Study: Central Java Province of Indonesia 可持续采矿管理的潜力和矿产储量平衡评估——以印度尼西亚中爪哇省为例

环境科学与工程:B Pub Date : 2019-03-28 DOI: 10.17265/2162-5263/2019.03.005

W. S. Bargawa, H. Oetomo, Yeremia Permana Jurianta Sembiring

{"title":"Evaluation of Potency and Mineral Reserve Balance for Sustainable Mining Management Case Study: Central Java Province of Indonesia","authors":"W. S. Bargawa, H. Oetomo, Yeremia Permana Jurianta Sembiring","doi":"10.17265/2162-5263/2019.03.005","DOIUrl":"https://doi.org/10.17265/2162-5263/2019.03.005","url":null,"abstract":"The level of availability and scarcity of resources gives an indication of how to manage scarce resources. Good mining practice supports sustainability and minimizes environmental degradation. One alternative to support the development of potential mineral resources is the study of mineral resource balances. The research objectives are: (a) to evaluate the potential of mineral resources and reserves, (b) to evaluate the production data of mineral commodities, (c) to calculate mineral reserve balance. Research methodology includes an inventory of data in the Department of Energy and Mineral Resources. Compilation of mineral resource balance adjusted to the applicable regulations. The study was conducted in the Central Java Province of Indonesia. Based on the evaluation results there were 26 mineral commodities, but there were only 12 commodities developed during 2016-2018. These resources are andesite, limestone, basalt, fill-dirt, sandstone, trass, feldspar, quartz-sand, marble, diorite stone, talk and claystone. The mineral reserve supports the construction of highways, airports and other infrastructure projects in Central Java Province of Indonesia.","PeriodicalId":58493,"journal":{"name":"环境科学与工程:B","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48672161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Impact of Forage Programme on Cattle Body Condition Score of Smallholder Farmers in Cambodia 饲料计划对柬埔寨小农牛体状况评分的影响

环境科学与工程:B Pub Date : 2019-03-28 DOI: 10.17265/2162-5263/2019.03.002

T. Kouch, Pen Miranda, S. Chetra, K. Kroesna, Seng Mom

引用次数: 2

How Has the Wine Sector Incorporated the Premises of Circular Economy? 葡萄酒行业如何融入循环经济的前提?

环境科学与工程:B Pub Date : 2019-03-28 DOI: 10.17265/2162-5263/2019.03.004

P. Berardi, J. Dias

{"title":"How Has the Wine Sector Incorporated the Premises of Circular Economy?","authors":"P. Berardi, J. Dias","doi":"10.17265/2162-5263/2019.03.004","DOIUrl":"https://doi.org/10.17265/2162-5263/2019.03.004","url":null,"abstract":": Much has been done in the wine production sector to promote sustainable development. Given its relevance in the economy and in society, it is fundamental to align its activities with the optimal use of resources and the regeneration and restoration of the natural system in agreement with the premises set by the Circular Economy (CE). The main interest of this work was, through a systematic literature review, to identify in the revised studies how the wine sector has incorporated the premises of CE in its activities. Six topics define the concerns addressed: water, solid waste, energy, chemical use, land use and ecosystems, in different parts of the chain: viticulture, winemaking and distribution. From the evaluation of 41 selected empirical studies, no clear definition regarding CE was found; however, the detailed analysis reveals aspects which incorporate CE practices such as the reduction of waste disposal by its treatment and recovery, the best use of resources at all stages of the process chain and the need to rethink and redesign current practices. The specific subjects identified were waste recovery, alternative energy sources such as biofuels production and water quality improvement. Land use, ecosystem impacts, and use of agrochemicals were not considered.","PeriodicalId":58493,"journal":{"name":"环境科学与工程:B","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48314615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4