@endphp Sci-Tech
Ultrasound irradiation shows potential to improve domestic wastewater quality

Ultrasound irradiation shows potential to improve domestic wastewater quality

04/11/2026
The application of low-frequency ultrasound irradiation to domestic wastewater has demonstrated its potential to reduce organic matter and microbial counts in experimental samples, according to a study by Hoang Duc An, Huynh Thi Minh Thanh, and Vo Thi Hong Phuong of the Faculty of Natural Sciences, Quy Nhon University. The findings also indicate that treatment performance depends on operating conditions and influent wastewater quality, suggesting that ultrasound could serve as a supplementary step in wastewater treatment processes.
  • Mapping agricultural drought in the Dong Nai river basin with Google Earth Engine

    Mapping agricultural drought in the Dong Nai river basin with Google Earth Engine

    By integrating Landsat 8 satellite imagery with the NDVI, LST, and VTCI indices on the Google Earth Engine platform, researchers from the Southern Institute of Water Resources Planning have developed an agricultural drought-zoning map for the Dong Nai River Basin for 2014–2024. Comparisons with reference drought indices and field survey findings suggest that the approach has potential for identifying drought-prone areas, particularly agricultural areas outside the service areas of irrigation infrastructure.
  • Science and technology for climate change adaptation in Vietnamese agriculture

    Science and technology for climate change adaptation in Vietnamese agriculture

    Selecting technologies suited to specific agroecological zones and producers’ capacity is an approach proposed by Nguyen Trong Tuan Anh, MSc, to strengthen agricultural resilience, improve resource-use efficiency, and advance green and circular production.
  • Mapping Arabica coffee potential on sloping land in Dien Bien

    Mapping Arabica coffee potential on sloping land in Dien Bien

    Using remote sensing data, geographic information systems (GIS), and the Analytic Hierarchy Process (AHP), Vietnamese scientists have developed a map of the potential for Arabica coffee cultivation on sloping land in Dien Bien Province. The findings identify areas with suitable natural conditions and provide a scientific basis for cultivation-zone planning, crop restructuring, and more efficient use of land and water resources in a mountainous province in northwestern Viet Nam.
  • Monitoring land surface temperature changes in Ho Chi Minh city during 2020–2025 using remote sensing data

    Monitoring land surface temperature changes in Ho Chi Minh city during 2020–2025 using remote sensing data

    Against the backdrop of climate change and rapid urbanization, land surface temperature (LST) in major cities tends to increase, thereby intensifying the urban heat island (UHI) effect. A study by Tran Van Trong, Nguyen Huy Anh, Tran Phuong Binh, and Bach Van Luong of Ho Chi Minh City University of Natural Resources and Environment aims to develop a workflow for monitoring and assessing LST variation in Ho Chi Minh City during 2020–2025 through the integration of remote sensing data and geographic information systems (GIS).
  • Radar imagery helps detect surface water in rice paddy fields in An Giang

    Radar imagery helps detect surface water in rice paddy fields in An Giang

    Whether rice paddy fields are inundated or dry produces distinct signatures in radar imagery. Building on this characteristic, researchers from the Southern Institute of Water Resources Research and the Vietnam National Space Center, Viet Nam Academy of Science and Technology, tested a method for detecting inundation in rice paddy fields in An Giang Province, providing an additional source of data for monitoring water regimes and estimating methane emissions from rice cultivation.
  • Enriching and cleaning the land database: VBDLIS application in Nghe An province

    Enriching and cleaning the land database: VBDLIS application in Nghe An province

    A land database can fully realize its value only when its data are accurate, complete, clean, up to date, and capable of being connected to and shared across the state management system. A study by Nguyen Dinh Trung of Vietnam National University of Agriculture and Nguyen Quang Thi of Thai Nguyen University of Agriculture and Forestry shows that applying VBDLIS in Nghe An province provided substantial support for organizing, reviewing, supplementing, synchronizing, and utilizing land data during the campaign to enrich and clean the national land database.
  • Identifying mangrove species composition in Xuan Thuy through multi-sensor remote sensing and machine learning

    Identifying mangrove species composition in Xuan Thuy through multi-sensor remote sensing and machine learning

    A study conducted in Xuan Thuy National Park combined field survey data with Sentinel-1 and Sentinel-2 remote sensing data and machine learning algorithms to identify and model the spatial distribution of mangrove species composition across the forest area. The results showed that Kandelia obovata (Trang) and assemblages containing K. obovata accounted for most of the mangrove forest area, while demonstrating the potential of multi-sensor remote sensing data for monitoring species distribution.
  • Viet Nam leverages GIS and AI for planning governance: A new model for digital government in Vinh Long

    Viet Nam leverages GIS and AI for planning governance: A new model for digital government in Vinh Long

    As digital transformation becomes a new driver of development, Vietnamese researchers have proposed a planning information system model that applies Geographic Information Systems (GIS) and artificial intelligence (AI) in Vinh Long Province. The research contributes to modernizing planning administration while introducing a new approach to digital government and data-driven governance in Viet Nam.
  • Vietnamese researchers develop fully recycled composite material from footwear waste

    Vietnamese researchers develop fully recycled composite material from footwear waste

    Using waste ethylene-vinyl acetate (EVA) shoe soles and vulcanized rubber—materials traditionally considered difficult to recycle—a research team from the School of Materials Science and Engineering at Hanoi University of Science and Technology has successfully developed a fully recycled composite material, creating potential new applications in green manufacturing and sustainable industrial production. The study not only contributes to addressing industrial waste challenges but also highlights Vietnam’s growing research and innovation capacity in sustainable materials and the circular economy.
  • Remote sensing, GIS, and AHP-based suitability mapping for Arabica coffee cultivation in Dien Bien province, Viet Nam

    Remote sensing, GIS, and AHP-based suitability mapping for Arabica coffee cultivation in Dien Bien province, Viet Nam

    The research project entitled “Development of a suitability map for Arabica coffee cultivation on sloping land in Dien Bien province using remote sensing data, GIS technology, and the analytic hierarchy process (AHP)” conducted by Dinh Xuan Hung, Bui Tuan Hai, and Nguyen Ngoc Sang of the Institute of Water Resources Planning represents a scientifically and practically significant study in the context of ongoing agricultural restructuring toward sustainable production systems that are better adapted to natural conditions and capable of utilizing land resources more efficiently in Viet Nam’s Northern midlands and mountainous region.
  • Fishing net materials for treating wastewater from intensive shrimp ponds

    Fishing net materials for treating wastewater from intensive shrimp ponds

    Intensive shrimp farming generates substantial economic benefits but also exerts increasing pressure on aquatic environments, particularly through wastewater rich in organic matter and toxic byproducts generated during farming operations. In the context where many shrimp farms still lack appropriate wastewater treatment systems, a research team from Can Tho University and Toan Viet Technological Environment Company Limited conducted an experimental study to assess the potential use of fishing nets—a readily available, low-cost material—as a filter material for biological treatment of wastewater from intensive shrimp ponds.
  • Flood forecasting and early warning communication as a tool for disaster risk management in Quang Tri province

    Flood forecasting and early warning communication as a tool for disaster risk management in Quang Tri province

    As floods become increasingly complex and extreme in Viet Nam’s North Central region, the demand for an early warning system that is reliable, fast to operate, and suitable for local-level application has become more urgent than ever. A research team from the Vietnam Academy for Water Resources—including Nguyen Thanh Hung, Vu Dinh Cuong, Trieu Quang Quan, and Nguyen Anh Hung—has developed an integrated technological solution that combines flood and inundation forecasting with modern communication tools. The study aims not only to enhance forecasting capacity but also to ensure that warning information reaches the right people at the right time under emergency flood conditions.
  • Treating pesticide wastewater: Performance and limits of the H₂O₂/UV system in an Isoprothiolane case study

    Treating pesticide wastewater: Performance and limits of the H₂O₂/UV system in an Isoprothiolane case study

    The use of pesticides is an integral part of modern intensive agriculture. Alongside their effectiveness in controlling pests and diseases, however, comes the risk of environmental pollution from wastewater generated during the production, formulation, and application of chemical active ingredients. Of particular concern is the fact that many pesticide compounds are poorly biodegradable, persistent in the environment, and prone to bioaccumulation, posing major challenges for wastewater treatment.
  • Mapping rainfall-induced soil erosion in Son La: Evidence from GIS-based analysis

    Mapping rainfall-induced soil erosion in Son La: Evidence from GIS-based analysis

    Steep terrain, concentrated heavy rainfall, and the increasingly evident impacts of climate change are placing Son La province’s land resources under growing pressure from soil erosion. By applying Geographic Information Systems (GIS) and the Revised Universal Soil Loss Equation (RUSLE), a research team comprising Tran Xuan Bien, Nguyen Van Huong, Luu Thuy Duong, and Tran Xuan Mien from the Hanoi University of Natural Resources and Environment and the Hanoi University of Mining and Geology has conducted a comprehensive study to assess the extent, severity, and spatial distribution of rainfall-induced soil erosion across the province. The findings offer an important scientific basis for land resource management and the formulation of sustainable development solutions in Son La.
  • Turning hillside soil and coal ash into tunnel-kiln bricks: A sustainable shift for the building materials industry

    Turning hillside soil and coal ash into tunnel-kiln bricks: A sustainable shift for the building materials industry

    As demand for construction materials continues to rise while conventional natural resources are gradually depleted, the search for sustainable, environmentally friendly production solutions has become increasingly urgent. Two scientific studies conducted by Dr. Pham Van Chung of Hanoi University of Natural Resources and Environment have identified a promising new pathway: the use of hillside soil, coal ash, and industrial by-products as raw materials for tunnel-kiln brick production within a circular economy framework.
  • Digitizing habitats of Cinnamomum parthenoxylon: Cloud-based modeling maps climate-adaptive areas in Vietnam’s Central Highlands

    Digitizing habitats of Cinnamomum parthenoxylon: Cloud-based modeling maps climate-adaptive areas in Vietnam’s Central Highlands

    Cinnamomum parthenoxylon, an endangered tree species of the Lauraceae family, is facing rapid habitat contraction under the combined pressures of climate change and forest degradation in Vietnam’s Central Highlands. A research team consisting of Pham Mai Phuong, Nguyen Thi Thu Nga, Nguyen Quoc Khanh, Nguyen Duy Liem, and Vu Dinh Duy employed the cloud-based Google Earth Engine (GEE) platform and the MaxEnt algorithm to develop habitat suitability maps for both current and projected future climates. This study marks the first application of a multi-scenario climate projection framework to assess the species’ adaptive potential toward the end of the 21st century. The findings provide an important scientific basis for the conservation, restoration, and sustainable planning of C. parthenoxylon in key provinces such as Lam Dong and Dak Nong (now part of the newly established Lam Dong Pprovince).
  • Vietnam’s cassava production reveals deep water inefficiencies across regions

    Vietnam’s cassava production reveals deep water inefficiencies across regions

    Amid accelerating climate change and shrinking water resources that are reshaping global food security, a new study by Trinh Phuong Ngoc, Nguyen Thu Thu Huong, Nguyen Tien Dat, and Dinh Quang Hung from Tan Trao University and the Institute of Environmental Science and Technology (Hanoi University of Science and Technology) provides the first systematic quantification of the water footprint of cassava production in Vietnam. The findings reveal stark regional disparities—some areas rely on thousands of cubic meters of supplemental irrigation to maintain yields, while others require almost no irrigation at all thanks to abundant rainfall and natural water availability. These results underscore an urgent need to restructure cassava-growing regions and promote more sustainable water use in agriculture.