Water impact investigations

In this study, the objective was to employ experimental design in order to optimize the efficiency of diesel oil removal from water using activated carbon sourced from rambutan peel. A central composite design was utilized to investigate the impact of contact time, adsorbent dosage, initial oil concentration, and pH on both the removal efficiency and oil adsorption capacity across 30 different experimental designs.

12p vijaychest 24-04-2024 6 2   Download

The study aims to investigate potential instabilities in the dike's soil structure. The findings of the research indicate that using the SLOPE/W module of the GEOSTUDIO software with GLEM provides the recommended factor of safety (FOS).

7p visergey 02-04-2024 4 1   Download

Ebook "Impact of urbanization on water shortage in face of climatic aberrations" gives a brief introduction to the study. It introduces to the reader the need and importance of the present investigation and describes the methodology adopted and the tools and concepts utilized. Gives an overview of multi-criteria decision-making. The working procedure, two examples and their applications to solve real-life problems in water resources are discussed.

105p tudohanhtau1006 29-03-2024 6 1   Download

This study investigates the impact of climate change (CC) on water resources in Phu Yen province, Vietnam by assessing historical trends of temperature, rainfall and flood simulation scenarios from a report of Vietnam of the Ministry of Natural Resources and Environment in 2020. The method for assessing the impacts on water resources was provided in the report of the Intergovernmental Panel on Climate Change (IPCC) in 2007.

14p viironman 02-06-2023 10 3   Download

The Red river system is a typical example of Southeast Asian rivers that is strongly impacted by human and climatic conditions, especially in the recent period. In this paper, we aim to investigate the longitudinal variation of the water quality of the Red river, in the section from Hanoi city to the Ba Lat estuary.

8p vicaptainmarvel 21-04-2023 4 3   Download

This thesis investigates the SPH capability available in the commercial Finite Element (FE) code LS-DYNA®, for water impact problems. Experiments have been conducted on rigid wedges impacting water, which were then simulated with the SPH method. Although certain limitations were experienced with the experimental results, a positive correlation was observed with the numerical technique, thus establishing SPH as a promising method for crashworthiness design.

176p runthenight07 01-03-2023 4 2   Download

The aim of this research was to investigate the formation of hydrogen sulphide for different sewage characteristics and flow rates. An experimental set-up was developed to simulate a section of a gravity sewer pipe, the set-up comprised of a pipe of 2 m long and 155 mm inside diameter, referred to in this thesis as a laboratory sewer pipe. The first stage of the experimental program involved developing a biological growth rich in sulphate-reducing bacteria inside the laboratory sewer pipe using synthetic sewage.

131p runthenight07 01-03-2023 4 2   Download

Adsorption of carbon dioxide on elastic layered metal-organic frameworks (ELMs) was investigated during and after exposure to water. Two ELM variants, ELM-11 and ELM-12, were contacted with water vapor and the impact of cyclical exposure on the CO2 capacity of the adsorbents was observed.

7p vironald 15-12-2022 6 2   Download

This study aimed to investigate the independent and combined effects of climate and land-use/cover changes on water and sediment dynamics in the Tokoro River Basin

12p thebadguys 15-01-2022 10 0   Download

Drag reduction in fully developed turbulent pipe flow with 4 concentrations (200 to 500 wppm or mg/kg) of low molecular weight sodium carboxymethylcellulose (CMC) in aqueous solutions was investigated experimentally. Drag reduction was determined by pressure drop measurements. Maximum drag reduction achieved was 22% using 500 wppm CMC solution. To observe the impact of the presence of CMC on the flow, ultrasound Doppler velocimetry (UDV) was employed to monitor the instantaneous velocity distributions.

10p langthannam 29-12-2021 7 0   Download

In this work, the degradation of Basic Red 29 (BR29), an azo dye, was investigated using a high-frequency ultrasonic reactor (300 kHz). The influence of several parameters such as initial substrate concentration (5–200 mg L−1 ), pH (3–10.1), ultrasonic power (20–80 W), and nature of the dissolved gas (Ar, air, and N2) on the degradation of BR29 was assessed. Additionally, the impact of natural matrices (seawater and natural and river waters) on the degradation rate of BR29 was clarified.

17p langthannam 29-12-2021 7 0   Download

A series of batch lab-scale experiments were performed to investigate the performance of dead phosphorylated algal biomass of Spirogyra species for the bioadsorption of Cu +2 ions from aqueous solutions. FT-IR and SEM analyses were performed to characterize the phosphorylated and raw algae. The SEM analysis indicated that the phosphorus content increases by about 5 times. The isotherm equilibrium data indicated that phosphorylation enhances the removal of Cu +2 from water by about 20%. The experimental isotherms fit well to Langmuir models with R 2 values close to 0.99.

19p langthannam 29-12-2021 9 0   Download

Salsola crassa M.B. is one of the most successful plants used against industrial pollutants. In this study, we selected young Salsola crassa M.B. plants from their natural habitats. Some plants were irrigated with industrial wastewater containing Fe, Co, Ni, Cu, Pb, and Zn, and others were irrigated with tap water for 3–4 months. Afterwards, the shoots and roots were randomly cut, separated, fixed, dyed, and observed using light microscopy. Structural changes were analyzed by stereology. There were some differences in appearance and structure between the treated and control samples.

13p tudichquannguyet 29-11-2021 13 1   Download

This study investigated the potential toxycity in vitro of biochar as well as water extract from biochar on seed germination of Oryza sativa, Brassica juncea, Vigna radiata, Solanum lycopersicum and Zea mays by Petri assay. Rice husk biochar does not affect on Oryza sativa germination (GI 97.60%) as well as has insignificant inhibition to Vigna radiata and Zea mays germination but adversely affecting on Brassica juncea and Solanum lycopersicum germination.

9p viuchinaga2711 25-10-2021 10 1   Download

A deep understanding of current and projected flood risk is need for effective flood risk management and better adaptation planning under climate change. This research aims to investigate the direct impacts of climate change on flood damage to rice under changes in water depth and flood extent induced by rainfall increase and sea-level rise.

6p vivacation2711 18-10-2021 14 0   Download

This paper aims to investigate the determinants of water demand in Kuwait and assess their impact on consumption. To do this, we applied the cointegration regression and the error correction model (ECM) on annual time series data, covering the period from 1972 to 2019. We found that the price elasticity for fresh water demand in Kuwait is negative and elastic in the long run (-1.095), which is consistent with the existing literature. Also, we found that the income elasticity for demand was positive in the long run (0.234), however, no short run effect was found for either price or income.

5p mynguyenha 21-07-2021 10 2   Download

The present investigation was conducted at ICAR- Directorate of Onion and Garlic Research, Rajgurunagar, Pune, Maharashtra, kharif, 2018-19, to examine the impact of water logging stress in onion. The experiment was conducted in pot condition to provide appropriate artificial water logging condition

10p trinhthamhodang11 27-04-2021 9 1   Download

This paper investigates the impacts of InterChannel Interference (ICI) effects on a shallow underwater acoustic (UWA) orthogonal frequency-division multiplexing (OFDM) communication system. Considering both the turbulence of the water surface and the roughness of the bottom, a stochastic geometry-based channel model utilized for a wideband transmission scenario has been exploited to derive a simulation model. Since the system bandwidth and the subcarrier spacing is very limited in the range of a few kHz, the channel capacity of a UWA system is severely suffered by the ICI effect.

8p nguaconbaynhay11 16-04-2021 17 4   Download

This study aimed at determining the effect of cooking time on nutritive characteristics of Justicia galeopsis leaves. J. galeopsis leaves were collected from cultivated farmlands located at Abobo and boiled at 100 °C respectively during 30, 45 and 60 min. Then, nutrients and antinutrients compositions were investigated using standard methods. Some molar ratios between antinutrients and mineral were also calculated and mineral bioavailability predicted.

11p chauchaungayxua10 18-03-2021 8 2   Download

Assessing the impact of technologies on yield and profitability of cultivation is an essential step before dissemination of the technologies for wider adaptation. Investigations were carried out at ICAR-Krishi Vigyan Kendra, CARD, Pathanamthitta, Kerala during September- December period of 2014 and 2015 to evaluate the impact of irrigation, fertigation and plastic mulching in bitter gourd variety Preethi.

8p gaocaolon9 22-12-2020 13 2   Download