![](images/graphics/blank.gif)
Water samples
-
Part 2 of ebook "Entropy theory and its application in environmental and water engineering" provides readers with contents including: parameter estimation; spatial entropy; inverse spatial entropy; entropy spectral analyses; minimum cross entropy spectral analysis; evaluation and design of sampling and measurement networks; election of variables and models;...
332p
mothoiphong
28-06-2024
2
1
Download
-
In this study, the simultaneous determination of Co, Cd, Ni, Cu, and Pb was carried out as a color complex with 4-(2-pyridylazo) resorcinol in an aqueous solution under the assesting of machine learning. A partial least-squares multivariate linear regression and artificial neuron network for the analysis of mixtures of metals were developed. MATLAB is a powerful software machine learning program that was used to support matrix calculations and displays.
8p
visergeyne
18-06-2024
0
0
Download
-
In this study, having used graphene additive and three main components, including ammonium polyphosphate acidifying agent, pentaerythritol carbonizing agent, and melamine blowing agent, we successfully research and manufacture a water-based fire retardant coating mixture for pine wood. After being manufactured, the mixture is coated on pine wood samples.
8p
visergeyne
18-06-2024
1
0
Download
-
In ebook "Nanoparticles in the water cycle: Properties, analysis and environmental relevance" the first section deals with basic aspects of nanoparticles and their function in air, water, soil and water treatment. The second part contains examples for the application of advanced instrumentation for quantification and characterisation of nanoparticles with special respect to aqueous samples.
243p
giangdongdinh
28-05-2024
1
1
Download
-
This study presents the adsorption process of methylene blue and other organic pigments in water samples using synthetic materials derived from agricultural waste combined with Fe3O4. The properties of the materials were determined through Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and nitrogen adsorption-desorption isotherm.
10p
dianmotminh02
03-05-2024
3
1
Download
-
In this study, we evaluated and compared the effectiveness of four different protocols (D, MJ, MA, and S) for separating MPs from water of different types (brackish, marine, and river). Known combinations of MP particles (polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS) and polyvinyl chloride (PVC) with size ranging between 150 μm and 700 μm were spiked into water samples. Our results showed that the average recovery effectiveness of microplastics using four studied methods ranged from 53% to 86%.
10p
dianmotminh02
03-05-2024
2
1
Download
-
The studies involving water bugs (Hemiptera) biodiversity and ecology are very few and have mainly focused on taxonomy. We conducted research and evaluation of diversity indexes of water bugs (Hemiptera) in different landscapes including forest habitats, agricultural lands, ponds, streams from 16 sampling sites in Bac Kan, Lao Cai, Ninh Binh and Ha Tinh provinces. As a result, a total of 43 species of 23 genera of 10 families were recorded.
14p
dianmotminh02
03-05-2024
3
1
Download
-
In this work, TiO2-doped carbon aerogel (TiO2/CA) was synthesized from sugarcane bagasse hydrothermal, freezedrying, and carbonization methods. The effects of the calcination temperatures of 400, 500, 600, 700, and 800 oC were also evaluated. The obtained TiO2/CA exhibits an ultralow density (0.021-0.032 g/cm3 ) and porosity of more than 97 %. The asprepared TiO2/CA was applied in photodegradation of methylene blue (MB) with the effects of dose sample and pH were also investigated.
11p
dianmotminh02
03-05-2024
2
1
Download
-
In this paper, a thin stearic acid (SA) film was deposited onto the polyurethane (PU) coatings with different concentrations of stearic acid in the ethanol (1 wt.%, 2 wt.% and 3 wt.%) by centrifuged technique. Fourier transform infrared spectra (FTIR) and water contact angle (WCA) method were performed to characterize and evaluate the hydrophobic layer formed on the surface of the samples.
9p
dianmotminh02
03-05-2024
3
2
Download
-
This study aims at determining the mass concentrations of PM and health risks on pollution event days (episodes) in Ha Noi. Semi-daily samples (daytime and night-time) of PM2.5 and PM0.1 were collected at Hanoi University of Science and Technology, in December 2021. The daily PM2.5 concentrations were in the range of 39 - 204 µg/m3 (average of 119 µg/m3).
11p
dianmotminh02
03-05-2024
7
3
Download
-
The main objective of this paper is to use the data-driven approach to predict and study the factors affecting the compressive strength of steel fiber concrete. Therefore, six machine learning (ML) models were evaluated against a database of 166 samples and ten input variables, including Cement content, Water content, Silica fume content, Steel fiber content, Coarse aggregate content, Sand content, Superplasticizer content, Fiber diameter, Fiber length, Fly ash content.
15p
viohoyo
25-04-2024
3
2
Download
-
Ebook "Analytical chemistry applied to emerging pollutants" addresses the highly relevant subject of emerging pollutants, which are especially alarming since most of the available treatment technologies are unable to degrade them. It discusses the sources of these pollutants and their fate in the environment, and the main tools available for their analysis. It also describes the representative environmental matrices (air, soil and water) and appropriate analytical methods for each matrix.
128p
tracanhphuonghoa1007
22-04-2024
4
2
Download
-
The study aims to assess the quality of soil and water environment in Phu My Species and Habitat Conservation Area, Kien Giang province. Water samples were collected at 16 sites in 7 different habitats (Lepironia articulata - Eleocharis dulcis habitat, Lepironia articulata - Melaleuca cajuputi habitat, Lepironia articulata - Ischaemum rugosum habitat, Eleocharis dulcis habitat,...
9p
viohoyo
25-04-2024
2
2
Download
-
This study applied principal components analysis (PCA) and cluster analysis (CA) to assess water quality and recommend sites and water parameters for water quality monitoring at Bung Binh Thien reservoir, An Giang province, Vietnam based on 11 water samples collected in the dry season.
10p
viohoyo
25-04-2024
3
2
Download
-
This paper described the methods and procedures for preparing the ILS of HUNRE Water Laboratory. Three water samples from three different locations were taken as the candidates' ILS. Those samples were passed procedures to determine the isotope composition's value and uncertainties.
7p
viohoyo
25-04-2024
3
2
Download
-
Water demand uncertainty in a water supply system (WSS) arises mainly due to the abnormal behaviors of water users and the change of network configuration when it is expanded to new consumers. In practice, this directly impacts the optimal designed WSS. This paper presents a methodology to address the issue of water demand uncertainty in the designing a WSS that combines the Latin Hypercube Sampling Technique (LHST) and a multiobjective algorithm optimization.
8p
vilarry
01-04-2024
6
1
Download
-
Study on the actual situation of domestic water of 24 military units in the Northern region in 2022. Subjects and methods: A descriptive cross-sectional study with analysis and evaluation of seven basic physical, chemical and microbiological indicators on 113 samples of domestic water collected at 24 military units stationed in the Northern Region from July to October, 2022.
4p
viohoyo
02-04-2024
3
2
Download
-
This study was designed to extract a high yield of polysaccharides from the M. smilacifolium trunk and characterize it. As a result, the maximum yield of the polysaccharides of 5.13 ± 0.05% was obtained with an extraction time of three hours, extraction temperature of 100 oC, the ratio of water to sample of 1:50 as extraction solution, extraction number of times 3, and the ratio of ethanol to extract volume 5:1 (v/v).
9p
viritesh
02-04-2024
6
1
Download
-
Ebook "Monitors of organic chemicals in the environment: Semipermeable membrane devices" will provide not only details and explanations for those scientists interested in applying SPMDs and other passive samplers, but that it also serves as a springboard for new research to expand and enhance the field of passive sampling. Also, it is important that the reader realize that many of the techniques and mathematical models presented herein apply to other passive samplers as well.
229p
manmanthanhla0201
27-02-2024
3
2
Download
-
The study was carried out to assess microplastic contamination in surface waters and beach sediments around the coastal areas of Quy Nhon city. The water and sediment samples were collected at 4 sites along Quy Nhon beach for analysis.
11p
vibego
02-02-2024
0
0
Download
CHỦ ĐỀ BẠN MUỐN TÌM
![](images/graphics/blank.gif)