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All Journal Environmental and Toxicology Management (ETM)
Ratnasari, Anisa
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Environmental Science Public Health

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Environmental factors influencing construction implementation from contractors’ perspective Maelissa, Nelda; Prihartanto, Eko; Ratnasari, Anisa
Environmental and Toxicology Management Vol. 3 No. 1 (2023): Environmental factors and their impacts
Publisher : Universitas Nahdlatul Ulama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33086/etm.v3i1.4145

Abstract

To achieve the project’s goal, both internal and external organization influencing factors (construction industry) should be aware, particularly at the construction implementation level. The objective of this research is to identify the environmental factors that influence construction implementation from the contractor’s perspective as the main actors in the implementation of construction. The methodology used in this research was library research and surveys using questionnaires as data instruments. The analytical method used is principal component analysis, supported by the SPSS program. Based on the analysis results of the environmental factors that influence the construction implementation level using principle component analysis, the total class produced 15 main components and was capable of explaining the various data with a cumulative percentage of 85.672%. From the study results, it can be concluded that the company resource factor was the most influential factor compared with other factors.
Antimicrobial textile modified with silver nanoparticles in-situ synthesized using weed leaves extract Ratnasari, Anisa
Environmental and Toxicology Management Vol. 1 No. 3 (2021): Green engineering principles and application
Publisher : Universitas Nahdlatul Ulama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (435.053 KB) | DOI: 10.33086/etm.v1i3.2502

Abstract

Silver nanoparticles (AgNPs) presence has considerable impact on microbial growth. In this paper, AgNPs was deposited on surface of four textiles to enhance the anti-microbial properties using immersion technique. Immersion technique was selected since it was simple, no need high energies, and no additional equipment required. In addition, AgNPs was synthesized using in situ-bio technique which is non-toxic, harmless and eco-friendly approach. Four textiles were evaluated, such as TA, TB, TC and TD. The finding projected that antifungal ability was correlated to the type of the textiles. TC textile has the significant antimicrobial activity with 12.33 ± 2.08 of inhibition zone which followed by TD (16.00 ± 3.46), TB (17.67 ± 7.09), and TA (17.67 ± 6.65). In addition, the surface bonding AgNPs on textile was possibility caused by the -OH group. It has a lone pair of electrons on the O atom that can interact with AgNPs to form –OAg bonds.
Potential of rainwater harvesting in wilayah persekutuan Malaysia Ratnasari, Anisa; Bhaskara Adiprabowo, Arya; Gilang Al Afgani, Andhika; Widiyanti, Atik; Oktavia, Lily
Environmental and Toxicology Management Vol. 2 No. 2 (2022): Environmental flows and natural resources management
Publisher : Universitas Nahdlatul Ulama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (308.966 KB) | DOI: 10.33086/etm.v2i2.3410

Abstract

Although Malaysia has abundant water resources, some parts of Malaysia are currently facing water shortage problems. The increasing demand for water has sparked initiatives to seek alternative water supplies. Rainwater harvesting has been proposed by governments as part of the solution to alleviate the problem of water scarcity. Literature related to rainwater harvesting is available from a variety of sources. In this study, rainfall was analysed as a crucial factor affecting RWHS efficiency, rainwater potential at different zones for residential, industrial, and commercial. In addition, the study evaluated the rainwater quality that obtain fresh rainfall and roof rainfall. Furthermore, potential of treatment technology for rainwater was suggested to optimate rainwater harvesting.
Co-Authors Atik Widiyanti Bhaskara Adiprabowo, Arya Eko Prihartanto, Eko Gilang Al Afgani, Andhika Lily Oktavia Maelissa, Nelda