المؤلفون: LI Xufeng, WANG Shaopo, ZHOU Yao, CHANG Jing, LI Rongguang

المصدر: Gongye shui chuli, Vol 44, Iss 5, Pp 132-140 (2024)

مصطلحات موضوعية: pre-ozone, ozone-activated carbon, advanced treatment, yangtze river water, bromate salt, Environmental technology. Sanitary engineering, TD1-1066

الوصف: The main water source of a water purification plant in Tianjin is Yangtze River water from Mid-route of South-to-North Water Transfer Project. On the basis of conventional processes, the plant has added pre-ozone, post-ozone and activated carbon enhancement processes to improve the quality of effluent. In this study, a small-scale experimental device was set up to investigate the effect of each process in enhancing of the conventional processes for treating Yangtze River water. The results indicated that the optimal dosages of flocculants PAC and FeCl3 were both 17 mg/L. The addition of pre- or post-ozone process to the conventional process could effectively enhance the removal of organic matter. The addition of activated carbon process could enhance the removal of turbidity and organic matter at the same time. The addition of post-ozone and activated carbon process could significantly enhance the removal of turbidity and organic matter. The optimum dosage for both pre- and post-ozone both were 1.0 mg/L. When the concentration of bromine ion in the raw water was up to 150 μ/L, the dosage of ozone in the conventional-post-ozone process and pre-ozone-conventional-post ozone process should be adjusted to ≤0.5 mg/L.

وصف الملف: electronic resource

العلاقة: https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-0401Test; https://doaj.org/toc/1005-829XTest

الوصول الحر: https://doaj.org/article/f3d014398df4456e9a9d5fa55a55a043Test

المؤلفون: Tien Zubaidah, Sulaiman Hamzani, Arifin Arifin

المصدر: Jurnal Kesehatan Lingkungan, Vol 16, Iss 2, Pp 181-189 (2024)

مصطلحات موضوعية: banjar regency, river water quality, human health, water usage, dissolved organic components, Environmental technology. Sanitary engineering, TD1-1066, Environmental pollution, TD172-193.5

الوصف: Introduction: Environmental contamination, especially water quality, is a global issue. The association between river water quality and human health is explored in Banjar Regency, rich in natural resources and essential rivers, utilizing dissolved organic components concentration as an indicator. Methods: A mixed-methods study in Banjar District, South Kalimantan, Indonesia, examined the impact of river water quality on human health, using dissolved forganic components as a primary indicator. Water quality assessments, nutrient content measurements, consumption surveys, and water-related disease epidemiology provided data. The statistical studies revealed key correlations and patterns. Results and Discussion: Water quality metrics varied among sampling locations. The dissolved fish feed negatively correlated with dissolved oxygen, while nutrient content weakly correlated with gastrointestinal disorders. High water temperatures increased respiratory illnesses. Drinking water from sources with high dissolved fish feed content caused digestive and respiratory problems. The study confirms previous research linking water quality parameters to health effects. The complex relationship between water quality and health is location-dependent, illustrating how environmental factors, especially water quality, shape illness trends. Conclusion: The study illuminates the complex links between river water quality, human health, and water usage in Banjar District. Dissolved fish feed content affects digestive and respiratory disorders, emphasizing the need of water quality management for regional health. These findings guide Banjar District water resource management and public health measures and help solve worldwide environmental pollution issues.

وصف الملف: electronic resource

العلاقة: https://e-journal.unair.ac.id/JKL/article/view/49709Test; https://doaj.org/toc/1829-7285Test; https://doaj.org/toc/2540-881XTest

الوصول الحر: https://doaj.org/article/ea5d584ab4b14a8789c31578382caddaTest

المؤلفون: Firaol Bedada Kopesa, Miliyon Dida Feye, Ashenafi Dechasa, Mezgebu Geme Worku, Oftau Sorsa

المصدر: Journal of Water and Climate Change, Vol 15, Iss 4, Pp 1933-1944 (2024)

مصطلحات موضوعية: river water, rural community, sodis, water quality, woliso area, Environmental technology. Sanitary engineering, TD1-1066, Environmental sciences, GE1-350

الوصف: The solar sterilization treatment innovation method can be implemented within households to address water pollution, especially those contaminants caused by microorganisms that may lead to waterborne illnesses. During review, water sources in the local area were assessed for turbidity and microbial quality. It was found that river water had turbidity levels of less than 30 NTU (Nephelometric Turbidity Units) during the dry season and typically up to 50 NTU during the wet season. This review aimed to understand the impact of these findings on the local area and its technological context. This study researched the utilization of sun-based radiation to clean the microbial mass tracked down in untreated water. Temperature and length of the openness are the two normal factors that were distinguished. The first water with a microbial heap of 40–55 (CFU) was presented to solar radiation at a temperature of above 44.5 °C outcome 0 (CFU) at the openness season of 6 h. The size and kind of materials utilized for this process were PET bottles of 1.5 L capacity with a half-dark tone. The factual examination at a 95% certainty information stretch has a p-value of

وصف الملف: electronic resource

العلاقة: http://jwcc.iwaponline.com/content/15/4/1933Test; https://doaj.org/toc/2040-2244Test; https://doaj.org/toc/2408-9354Test

الوصول الحر: https://doaj.org/article/103b96fb131e4fdc9f8745d77dea68d6Test

المؤلفون: Diana A. Stavreva, Lyuba Varticovski, Razi Raziuddin, Gianluca Pegoraro, R. Louis Schiltz, Gordon L. Hager

المصدر: Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)

مصطلحات موضوعية: Biological activity, Hormones, Screening, River water, Medicine, Science

الوصف: Abstract Progesterone receptor (PR)-interacting compounds in the environment are associated with serious health hazards. However, methods for their detection in environmental samples are cumbersome. We report a sensitive activity-based biosensor for rapid and reliable screening of progesterone receptor (PR)-interacting endocrine disrupting chemicals (EDCs). The biosensor is a cell line which expresses nuclear mCherry-NF1 and a green fluorescent protein (GFP)-tagged chimera of glucocorticoid receptor (GR) N terminus fused to the ligand binding domain (LBD) of PR (GFP-GR-PR). As this LBD is shared by the PRA and PRB, the biosensor reports on the activation of both PR isoforms. This GFP-GR-PR chimera is cytoplasmic in the absence of hormone and translocates rapidly to the nucleus in response to PR agonists or antagonists in concentration- and time-dependent manner. In live cells, presence of nuclear NF1 label eliminates cell fixation and nuclear staining resulting in efficient screening. The assay can be used in screens for novel PR ligands and PR-interacting contaminants in environmental samples. A limited screen of river water samples indicated a widespread, low-level contamination with PR-interacting contaminants in all tested samples.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2045-2322Test

الوصول الحر: https://doaj.org/article/22d46109ab134ab3baf024db0dc843bdTest

المؤلفون: Hadi Norouzi, Jalal Bazargan

المصدر: Applied Water Science, Vol 14, Iss 4, Pp 1-9 (2024)

مصطلحات موضوعية: Advection–dispersion equations, River water pollution, Linear Muskingum method, Particle swarm optimization (PSO) algorithm, Water supply for domestic and industrial purposes, TD201-500

الوصف: Abstract River water pollution is one of the most important environmental issues. Advection–dispersion equations are used to study the temporal changes in pollutant concentration along the study river reach. The use of advection–dispersion equations in investigating how the concentration of pollution is transformed requires a lot of data including river cross-section characteristics, dispersion coefficient, and upstream and downstream boundary conditions, etc. therefore, the corresponding calculations are very costly, difficult and time-consuming. In the present study, instead of using the mentioned equations, the linear Muskingum method (used in previous studies for flood routing) and the particle swarm optimization (PSO) algorithm was used for the first time to calculate the temporal changes in pollution concentration at different stream locations. The presented solution in the presented study is very accurate and only requires the temporal changes in concentration in the upstream and downstream of the study river reach and for this reason, it is very low-cost and easy to use and requires less time to collect data and perform calculations. In the proposed method, the parameters (X, K, ∆t) of the linear Muskingum method were optimized using the PSO algorithm, and by dividing the temporal changes in the input concentration into three areas of the beginning (the input concentration is greater than the output concentration), the peak (the maximum input and output concentrations) and the end (the output concentration is greater than the input concentration) areas, the accuracy of the calculations increased. The mentioned method was studied for different lengths (first case of x = 50 m (up) and x = 75 m (down), second case of x = 50 m (up) and x = 100 m (down), third case of x = 75 m (up) and x = 100 m (down)) and the mean relative error (MRE) of the total, peak area and the relative error of the maximum concentration using constant parameters for the first case were calculated as 7.08, 1.02, and 2.34 percent, for the second case as 7.41, 11.06 and 6.69 percent, and for the third case as 6.75, 3.59 and 5.42 percent, respectively. If three parameters of (X, K, ∆t) are used, the mentioned values improved by 31.3, 63.7 and 65.5 percent, respectively compared to the case of using constant parameters.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2190-5487Test; https://doaj.org/toc/2190-5495Test

الوصول الحر: https://doaj.org/article/c997b6c4828846049371118736acad78Test

المؤلفون: Oleg G. Savichev

المصدر: Мелиорация и гидротехника, Vol 14, Iss 1, Pp 188-204 (2024)

مصطلحات موضوعية: river water levels, rivers of the tomsk region, coastline, flooding and underflooding zones, Hydraulic engineering, TC1-978

الوصف: Purpose: to develop the methodology of physical and geographical control of the validity of determining the boundaries of rivers and their special zones in the territory of Tomsk region. Materials and methods. The initial materials were the materials of the regime hydrological (Roshydromet) and hydrogeological (Gidrospetzgeology) observations, the results of engineering surveys and examinations. The main objects are the Tom river at Tomsk city, the Vasyugan river at New Vasyugan settlement, the Iksa river at Plotnikovo village, the Klyutch river at Polynyanka village. Additionally, data on the Ob and Parabel rivers and other tributaries of the Ob river were used. Results. The calculations of the position of the coastline and the boundaries of flood and underflooding zones of a number of river valleys in Tomsk region were carried out. A comparison of the characteristic levels of river waters with the hydrogeological, geomorphological and geobotanical conditions of river valleys (also underflooding conditions with the prevailing channel process types) was carried out. The physicogeographical methodology of validity control of estimating the coastline, protection, flooding and underflooding zones boundaries are proposed. Conclusions. It is shown that estimating the position of the river coastal line in Tomsk region can be carried out according to the data not only on the average daily water levels for the period of the free channel, but also the average monthly levels of river waters of the spring-summer flood and summer-autumn low water season. It was established that the average maximum level and the maximum level of 1 % occurrence relate to the relief, groundwater levels and the vegetation cover of the river valleys. It was revealed that the probability of the river valley underflooding increases in the case of floodplain anabranching and free meandering and decreases with the pre-dominance of limit meandering.

وصف الملف: electronic resource

العلاقة: https://rosniipm-sm.ru/article?n=1432Test; https://doaj.org/toc/2712-9357Test

الوصول الحر: https://doaj.org/article/9cf6c3923dbd4ae88db39fb2d5b7b004Test

المؤلفون: Adewale Olalemi, ADEDOTUN ADEUSI, Michael Bayode

المصدر: Microbes and Infectious Diseases, Vol 5, Iss 1, Pp 127-138 (2024)

مصطلحات موضوعية: faecal pollution, hepatitis a virus, human health, microbial risk assessment, river water, Infectious and parasitic diseases, RC109-216

الوصف: Background: The pollution of water bodies is a serious concern in most rural areas in low- and middle-income countries due to anthropogenic activities which pose the greatest risk of human hepatitis viruses to public health. The aim of the study was to determine the probability of hepatitis A virus (HAV) infection associated with human consumption of water from River Owena, Nigeria. Methods: Water samples were collected from points with intense anthropogenic activities during dry and wet periods. Loads of enteric bacteria and HAV were determined using culture-based method and molecular technique. Risks of HAV infection was estimated using dose-response model, and probabilities of clinical illness and mortality were also determined. Results: Results revealed that the levels E. coli and faecal coliforms were greater during the wet period than the dry period (p< 0.05). Concentration of HAV was greater during the dry period than the wet period (p< 0.05). Risks of HAV infection were higher during the dry period than the wet period, and were all above the US EPA acceptable risk limit. Risk of clinical illness and mortality due to HAV were higher during the dry period than the wet period. Conclusions: Ingestion of water from the river may result into liver inflammation, morbidity or death. Development of active water management plans to reduce pollutant fluxes and address contamination threats must be established.

وصف الملف: electronic resource

العلاقة: https://mid.journals.ekb.eg/article_310670_1df506a644fe1ef996426107e3ad8884.pdfTest; https://doaj.org/toc/2682-4132Test; https://doaj.org/toc/2682-4140Test

الوصول الحر: https://doaj.org/article/e6932310dcfc4c53b8be742807da971fTest

المؤلفون: Sudarno Sudarno, Mochamad Agung Wibowo, Pertiwi Andarini, Dionisius Veda Priya Kurniatama, Natasya Ghinna Humaira

المصدر: Ecological Engineering & Environmental Technology, Vol 25, Iss 2, Pp 311-323 (2024)

مصطلحات موضوعية: water quality, river water, water parameter, Ecology, QH540-549.5

الوصف: Clean water quality is a problem, especially for developing countries in Asia. Their efforts to maximize various sectors to become a developed country, for example in industrial activities, result in negative environmental impacts, especially for water quality. Wastewater that is directly discharged into river bodies without any treatment causes river water quality to become increasingly worse. The Water Quality Index (WQI) is one of the tools used to assess river water quality. There have been many studies that examine river water quality in Asia, but there are still few studies that discuss river water quality as a whole in Asia, especially for developing countries where industrial activities are massive. This study discusses trends in river water quality in developing countries in Asia. The results obtained show that most river water quality in Asia falls into the medium to poor category, even poor in some situations, especially areas with dense populations in areas around rivers which are full of domestic and industrial activities. For this reason, there is a need for a more advanced WQI assessment which is carried out using scientific analysis using fuzzy logic so that the WQI value can be more accurate and QGIS can provide broader information. There needs to be cooperation and good relations between the community, stakeholders and the government in an effort to overcome river pollution which will become even worse by providing stricter regulations, establishing proper water treatment so that industrial or domestic waste water does not directly enter water bodies, and create appropriate policies. Therefore, it is important to be able to develop a river water quality assessment system such as WQI to be more accurate so that these actions can be carried out.

وصف الملف: electronic resource

العلاقة: http://www.ecoeet.com/Methods-for-Determining-theTest-Water-Quality-Index-in-Developing-Asian-Countries-A-Review,176709,0,2.html; https://doaj.org/toc/2719-7050Test

الوصول الحر: https://doaj.org/article/c63bf384647540b9807bc1535b6aadfaTest

المؤلفون: Shahad Fadhil ALRubaye, Naseer A. Al Haboubi, Hussein A. Al-Amili, Aiman H. Al-Allaq, Dhuha Ahmed Mohammed

المصدر: Journal of Engineering and Sustainable Development, Vol 28, Iss 4 (2024)

مصطلحات موضوعية: Aluminum, electrocoagulation, Hardness, Reverse osmosis rejected water, River water, Engineering (General). Civil engineering (General), TA1-2040

الوصف: The present study focuses on the technique of hardness removal by using a novel reactor performing an electrocoagulation (EC) process. The variation of alkalinity is also recorded. Continuous flow experiments were conducted for Total Hardness (TH) removal using a transparent plastic reactor using aluminum plate electrodes that have holes so that the water flows through the plates in a zigzag way. The influence of various operating parameters such as the number of plates (two and four), flow rate (600, 1000 L/h), and water type (Tigris River & rejected water from Reverse Osmosis system RO) was investigated. The results showed that an increase in the number of electrodes led to an increase in the total hardness removal efficiency. In addition, the increase in the flow rate led to a decrease in the removal efficiency. For the rejected RO water type, the highest hardness removal rate was 16.16% for 4 plates electrodes and 600 L/h flow rate while for the river water was 29% for 4 plates electrodes and 1000 L/h.

وصف الملف: electronic resource

العلاقة: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/2309Test; https://doaj.org/toc/2520-0917Test; https://doaj.org/toc/2520-0925Test

الوصول الحر: https://doaj.org/article/d8befd860d0842988222a42f2b2c1009Test

المؤلفون: Tian, Run, 1994, Posselt, Malte, 1987, Fenner, Kathrin, McLachlan, Michael S.

المصدر: Environmental Science and Technology Letters. 10(1):40-45

مصطلحات موضوعية: biodegradation, river water, sediment, micropollutants, OECD 309

الوصف: The environmental relevance of standard biodegradation tests such as OECD 309 has been questioned. Challenges include the interpretation of changing degradation kinetics over the 60–90 incubation days and the effects of chemical spiking on the microbial community. To ameliorate these weaknesses, we evaluated a modified OECD 309 test using water and sediment from three Swedish rivers. For each river, we had three treatments (no spiking, 0.5 μg L–1 spiking, and 5 μg L–1 spiking). The dissipation of a mixture of 56–80 spiked chemicals was followed over 14 days. Changes in dissipation kinetics during the incubation were interpreted as a departure of the microbial community from its initial (natural) state. The biodegradation kinetics were first-order throughout the incubation in the no spiking and 0.5 μg L–1 spiking treatments for almost all chemicals, but for the 5 μg L–1 treatment, more chemicals showed changes in kinetics. The rate constants in the no spiking and 0.5 μg L–1 treatments agreed within a factor of 2 for 35 of 37 cases. We conclude that the environmental relevance of OECD 309 is improved by considering only the initial biodegradation phase and that it is not compromised by spiking multiple chemicals at 0.5 μg L–1.

وصف الملف: print

الوصول الحر: https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-213123Test
https://doi.org/10.1021/acs.estlett.2c00811Test