Aging Processes of Polyethylene Mulch Films and Preparation of Microplastics with Environmental Characteristics

2020 ◽  
Author(s):  
Ting Wang ◽  
Yini Ma ◽  
Rong Ji
Keyword(s):  
Environmental Characteristics ◽  
Mulch Films ◽  
Polyethylene Mulch

scholarly journals Effects of Mulch Types and Concentrations of 1,3-Dichloropropene plus Chloropicrin on Fumigant Retention and Nutsedge Control

2006 ◽  
Vol 16 (4) ◽  
pp. 637-640 ◽  
Author(s):  
Bielinski M. Santos ◽  
James P. Gilreath ◽  
Timothy N. Motis ◽  
Marcel von Hulten ◽  
Myriam N. Siham
Keyword(s):  
Correlation Analysis ◽  
High Density Polyethylene ◽  
Field Trials ◽  
Herbicidal Activity ◽  
Cyperus Rotundus ◽  
Purple Nutsedge ◽  
Weed Density ◽  
Mulch Films ◽  
Polyethylene Mulch ◽  
Over Time

Field trials were conducted to: 1) determine the effect of mulch types and applied concentrations of 1,3-dichloropropene + chloropicrin (1,3-D + Pic) on fumigant retention; and 2) examine the influence of mulch films and 1,3-D + Pic concentrations on purple nutsedge (Cyperus rotundus) control. 1,3-D + Pic concentrations were 0, 600, 1000, and 1400 ppm, and mulch types were white on black high-density polyethylene mulch (HDPE), white on black virtually impermeable film (VIF-WB), silver on white metalized mulch, and green VIF (VIF-G). Regardless of the initial 1,3-D + Pic concentrations and mulch types, fumigant retention exponentially decreased over time. When 1400 ppm of 1,3-D + Pic were injected into the soil, 1,3-D + Pic dissipation reached 200 ppm at 3.2, 2.9, 2.2, and 1.5 days after treatment (DAT) under VIF-G, VIF-WB, metalized, and HDPE mulches, respectively. At 5 weeks after treatment (WAT), HDPE mulch had the highest purple nutsedge densities among all films. The treatments covered with VIF-G had purple nutsedge densities <5 plants/ft2, regardless of the applied fumigant concentration, while VIF-WB and metalized mulch reached this weed density with 696 ppm of the fumigant. In contrast, 1186 ppm of 1,3-D + Pic were needed to reach this weed density with HDPE mulch. Correlation analysis showed that mulch fumigant retention readings at 3 DAT effectively predict purple nutsedge densities at 5 WAT (r ≤ –0.94). These findings proved that 1,3-D + Pic activity on purple nutsedge can be improved with the use of more retentive films, which cause longer fumigant retention, thus improving efficacy. Growers might elect reducing 1,3-D + Pic rates to compensate for the relatively higher cost of fumigant-retentive mulches, without losing herbicidal activity.

scholarly journals DIFFERENTIAL PURPLE NUTSEDGE (Cyperus rotundus) PENETRATION THROUGH MULCH FILMS

HortScience ◽  
2005 ◽  
Vol 40 (3) ◽  
pp. 889c-889
Author(s):  
Bielinski M. Santos ◽  
James P. Gilreath
Keyword(s):  
Physical Properties ◽  
Field Trials ◽  
Cyperus Rotundus ◽  
Purple Nutsedge ◽  
Mulch Films ◽  
Polyethylene Mulch

Purple nutsedge can easily penetrate polyethylene mulch films. However, there are no reports on possible differences among mulch films. Because of this situation, field trials were conducted in Ruskin and Bradenton, Fla., during 2002 and 2003. In Spring 2002, the treatments were a) no mulch, b) black Pliant High Barrier mulch, and c) green Klerk's Virtually Impermeable Film (VIF). In Spring 2002, the films were a) black Pliant High Barrier, b) black IPM Bromostop, c) metallized Pliant, and d) green Klerk's VIF. The number of nutsedge emerged through the films was determined. No fumigants or herbicides were applied. Results indicated that the Klerk's VIF had the lowest nutsedge densities. No nutsedge control differences were found between the IPM Bromostop and the metallized Pliant films. These differences might be due to the physical properties of the films, including stretching and thickness.

Study on Location and Ecological Environmental Characteristics of Onshore Wind and Solar Generation Projects

2020 ◽  
Vol 11 (3) ◽  
pp. 145-153
Author(s):  
Yongyan Zhu ◽  
Hyunchan Sung ◽  
Yoonji Kim ◽  
Sunghoon Cha ◽  
Seongwoo Jeon
Keyword(s):  
Environmental Characteristics ◽  
Onshore Wind ◽  
Solar Generation

DEVELOPMENT OF DETERGENT RECIPE WITH IMPROVED ENVIRONMENTAL CHARACTERISTICS

2020 ◽  
Vol 5 (4) ◽  
pp. 223-229
Author(s):  
Yuliia Slyva ◽  
◽  
Oleksiy Verenikin ◽  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Synthetic Detergent ◽  
General Scheme ◽  
Practical Experience ◽  
Environmental Characteristics ◽  
Environmental Standard ◽  
Ecological Characteristics ◽  
Environmental Criteria ◽  
Environmental Properties

The research on the development of an innovative formula of a synthetic detergent with improved environmental properties, which meet the environmental standard of SOU OEM 08.002.12.065:2016 "Detergents and cleaning products. Environmental criteria for life cycle assessment" is carried out. The accumulated theoretical and practical experience is generalized, the general scheme of designing and development of new goods taking into account features of detergents with the improved ecological characteristics is created.

CARACTERIZAÇÃO GEOAMBIENTAL DO MUNICÍPIO DE MILAGRES/CE

2019 ◽  
Vol 21 (2) ◽  
pp. 925-935
Author(s):  
Thais Dos Anjos Soares ◽  
Sinara Gomes De Souza ◽  
Simone Cardoso Ribeiro
Keyword(s):  
Risk Analysis ◽  
Physical Geography ◽  
Work Place ◽  
Environmental Characteristics ◽  
Geomorphological Processes ◽  
Constituent Elements ◽  
Selection Of ◽  
Area Of Study

Para compreensão da dinâmica do espaço natural, a Geografia Física possuiu inúmeras interdisciplinaridades que a acompanham, e a caracterização geoambiental é uma delas, no propósito de reconhecimento dos elementos constituintes da paisagem. O presente trabalho foca na caracterização geoambiental do município de Milagres, município do sul cearense, e teve como metodologia, pesquisa bibliográfica e cartográfica acerca dos elementos geoambientais da área de estudo, assim como a elaboração de material cartográfico utilizando os programas ArcGis e Qgis. Partindo desse material foi realizado uma breve descrição deste município, focando fundamentalmente nas características ambientais. É essencial o estudo da área em que irá realizar pesquisas, buscando o aprofundamento dos saberes de seus aspectos geoambientais para se obter uma prévia do conhecimento do local que irá ser trabalhado.Palavras-chave: Caracterização Geoambiental; Cariri cearense; Milagres/CE. ABSTRACTFor the dynamics of the natural space, a physical geography had numerous interdisciplinarities that accompany it, and a geoenvironmental characterization is one of them, without the purpose of recognition of the constituent elements of the landscape. The process of analysis of the processes of risk analysis and analysis of the morphosculpture processes and their use in the soil and in the health and sciences / EC systems, which studies the thematic knowledge of geomorphological processes considering the knowledge about nature and values of culture and local landscape, however, the geoenvironmental characterization work of the municipality of Milagres / CE. The work had as a methodological objective, bibliographical research and the translation of the geoenvironmental elements of the study area. For this work, cartographic material was elaborated using the programs ArcGis and Qgis. Starting from this material was a detailed description of its area of study, as well as one of its environmental characteristics. What is essential for the selection of geoenvironmental data to obtain a preview of the knowledge about the work place that will be realized.Keywords: Geoenvironmental Characterization; Cariri cearense; Milagres/CE. RESUMENPara comprender la dinámica del espacio natural, la Geografía Física tiene numerosas interdisciplinarías que la acompañan, y la caracterización geoambiental es una de ellas, para reconocer los elementos constitutivos del paisaje. El presente trabajo se centra en la caracterización geoambiental del municipio de Milagres, municipio de sul cearense, y tuvo como metodología, investigación bibliográfica y cartográfica sobre los elementos geoambientales del área de estudio, así como la elaboración de material cartográfico utilizando los programas ArcGis y Qgis. A partir de este material se realizó una breve descripción de este municipio, centrándose principalmente en las características ambientales. Es esencial estudiar el área en la que realizar investigaciones, buscando profundizar el conocimiento de sus aspectos geoambientales para obtener un conocimiento previo del lugar donde se trabajará.Palabras clave: caracterización geoambiental; Cariri Ceará; Milagros / CE.

Review of the Environmental Characteristics of Fire Extinguishing Substances of Different Composition used for Fires Extinguishing of Various Classes

2019 ◽  
Vol 14 (16) ◽  
pp. 5925-5941 ◽  
Author(s):  
Valentyna Loboichenko ◽  
Victor Strelets ◽  
Maya Gurbanova ◽  
Andriy Morozov ◽  
Pavlo Kovalov ◽  
...  
Keyword(s):  
Environmental Characteristics ◽  
Fire Extinguishing
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