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Five years after the Brumadinho dam collapse: Evaluation of water quality based on combined analysis of land use and environmental data

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Science of the Total Environment 2024年 957卷 177619页

作者： Mello, Caio C.S. Leão, Monica M.D. Amorim, Camila C. Postgraduate Program in Sanitation Environment and Water Resources Federal University of Minas Gerais MG Belo Horizonte Brazil Department of Sanitary and Environmental Engineering Federal University of Minas Gerais MG Belo Horizonte Brazil

The collapse of the dam in the Paraopeba River watershed in 2019 triggered significant concerns regarding water quality in the region. This study aimed to assess, five years after the disaster, the effects on water quality and understand the underlying factors of environmental pressure contributing to the observed changes. To perform the evaluation, the study utilized surface water quality data pre-disaster (2012–2018) and post-disaster (2019–2023), environmental data regarding the identification of high-polluting potential industries operating in the region of interest, and land use for the watershed as a combined evaluation. Nonparametric statistical tests Kruskal-Wallis, complemented by Dunn's, were employed to assess the significance of changes in water quality parameters post-collapse. The results indicate a relatively stable baseline scenario of land use dominated by agriculture and pasture, with minor changes observed in forest cover and urban development. However, post-collapse assessments showed significant variations in water quality parameters, with turbidity exceeding conformity levels by up to 68 % (over 100 NTU), dissolved iron (Fe) by up to 70 % (over 0.3 mg.L–1), manganese (Mn) by up to 91 % (over 0.1 mg.L–1), dissolved aluminum (Al) by up to 83 % (over 0.01 mg.L–1), and lead (Pb) by up to 26 % (over 0.01 mg.L–1). Statistical tests suggested possible effects of the dam collapse on turbidity, pH, dissolved Fe, Mn, and dissolved Al. Temporal analysis showed constant effects on water quality, with notable increases in dissolved Fe and Mn concentrations observed upstream post-disaster and persistent impacts downstream. New mining activities licensed after 2019 may have contributed to the deterioration of water quality, highlighting the relevant relationship of anthropogenic activities and the environmental disaster in the Paraopeba River watershed. © 2024 Elsevier B.V.

关键词： Rivers

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How will climate change affect the sources of global irrigation water withdrawal?

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Science Bulletin 2024年第21期69卷 3361-3364页

作者： Zhipin Ai Xin Zhao Julien Boulange Fadong Li Rashid Mahmood Qiuying Zhang Yonghui Yang Jun Xia Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 101408China Earth System Division National Institute for Environmental StudiesTsukuba 305-8506Japan United Graduate School of Agricultural Science Tokyo University of Agriculture and TechnologyTokyo 183-8509Japan Water Engineering and Management Asian Institute of TechnologyPathumthani 12120Thailand Chinese Research Academy of Environmental Sciences Beijing 100012China Center for Agricultural Resources Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021China State Key Laboratory of Water Resources Engineering and Management Wuhan UniversityWuhan 430072China

Irrigation plays a vital role in global food production,contributing approximately 40%of the total production[1],although the contribution varies by crop type[2,3].However,irrigation water withdrawal constitutes 65%–70%of total global anthropogenic water withdrawal[4,5],making it the largest water-use sector *** irrigation water demand,sources,and availability,particularly in the context of climate change,is crucial for identifying potential threats to crop production and ensuring future global food *** studies have focused extensively on the impacts of climate change on irrigation water demand and withdrawal[6–9];however,it remains unclear how climate change will affect the sources of irrigation water withdrawal.

关键词： irrigation withdrawal sources

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Drought propagation in an Andean basin in South America: a spatio-temporal analysis approach with monitoring indices

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Arabian Journal of Geosciences 2025年第3期18卷 1-21页

作者： Ocampo-Marulanda, Camilo Mera-Franco, Julián David Lizcano, Víctor Augusto Carvajal-Escobar, Yesid Canchala, Teresita Zorrilla-Millan, Daniel Felipe Caicedo-Bravo, Eduardo Water Resources Engineering and Soil Research Group (IREHISA) School of Natural Resources and Environmental Engineering Universidad del Valle Cali Colombia Graduate Program in Biometrics and Applied Statistics Department of Statistics and Informatics Federal Rural University of Pernambuco Recife Brazil School of Exact Sciences and Engineering Universidad Sergio Arboleda Bogotá Colombia Programa de Ingeniería Ambiental Facultad de Ingeniería Universidad Mariana Pasto Colombia School of Electrical and Electronic Engineering Universidad del Valle Cali Colombia

Drought is a climatic phenomenon that has increased in severity over time. This study analyzed drought spread in the Alto Patía basin (13,047 km2) in South America, applying the Standardized Precipitation Index (SPI), Vegetation Health Index (VHI), and Streamflow Drought Index (SDI) to assess meteorological, agricultural, and hydrological drought, respectively. Synchronous and asynchronous correlations were estimated, and Wavelet analysis was conducted to verify relationships among drought types. Results show that the lag between drought types varies based on the intensity, temporal continuity, and spatial extent of meteorological drought. A lag of zero months (1–2 months) was observed between meteorological and hydrological drought when moderate (severe) meteorological drought partially (fully) covers the basin. Agricultural drought, however, does not always correspond to meteorological drought during isolated rainfall events. As the first study in Colombia to systematically connect these drought types, this research addresses a gap in understanding how drought impacts progress across systems in regions with complex rainfall patterns. These findings offer critical insights into the interdependencies among drought types, supporting enhanced drought monitoring and early warning systems in similar climatic regions. By identifying specific lags between meteorological and hydrological droughts, this study provides practical guidance for land management, water conservation, and crop planning, offering a foundation for future research on drought resilience strategies.

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Cover crops,crop rotation,and gypsum,as conservation practices,impact Mehlich-3 extractable plant nutrients and trace metals

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International Soil and water Conservation Research 2024年第3期12卷 650-662页

作者： Javier M.Gonzalez Warren A.Dick Khandakar R.Islam Dexter B.Watts Norman R.Fausey Dennis C.Flanagan Marvin T.Batte Tara T.VanToai Randall C.Reeder Vinayak S.Shedekar National Soil Erosion Research Laboratory USDA-ARSWest LafayetteIN 47904USA School of Environment and Natural Resources The Ohio State UnivWoosterOH 44691USA CFAES-South Centers SoilWater&Bioenergy Resources ProgramThe Ohio State Univ.PiketonOH 45661USA National Soil Dynamics Laboratory USDA-ARSAuburnAL 36832USA Soil Drainage Research Unit USDA-ARSColumbusOH 43210USA Department of Agricultural Environmental and Development EconomicsThe Ohio State UnivColumbusOH 43210USA Department of Food Agricultural and Biological EngineeringThe Ohio State Univ.ColumbusOHUSA

Conservation practices are encouraged to improve soil health and sustain agronomic crop ***-3 is often used as a multi-nutrient extractant to determine soil fertility status.A study inves-tigated the impacts of the conservation practices of gypsum,cover crops,and crop rotation on 28 Mehlich-3 extractable elements,of which 11 were considered plant nutrients,from soil at three mid-western US *** was collected from 0 to 15 and 15-30 cm depths 5 years after implementing the conservation *** consisted of(1)with and without cereal rye(Secale cereale L.)winter cover,(2)continuous soybean[Glycine max(L.)Merr.]***-corn(Zea mays L.)rotation,and(3)annual gypsum application(0,1.1,and 2.2 Mg ha-1).Differences were observed by site,depth,and conservation practice depending on the element *** interactive effects were observed among *** most consistent effect was observed for crop rotation across *** only affected the site with the greatest clay content,where more Ca and S were retained,and Mg and Mn *** crop only affected elements at this high clay site,where different elements were positively or negatively *** suggest that not one practice fits all,and optimum conservation practices must be tailored for the site.

关键词： Gypsum Cover crops Crop rotation Mehlich-3 Plant nutrients Trace metals

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Molecular insight of dissolved organic matter and chlorinated disinfection by-products in reclaimed water during chlorination with permanganate preoxidation

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Chemosphere 2024年 349卷 140807页

作者： Hu, Wei Niu, Xi-Zhi Chen, Huan Ye, Bei Liang, Jun-Kun Guan, Yun-Tao Wu, Qian-Yuan Environmental Protection Key Laboratory of Microorganism Application and Risk Control Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety Institute of Environment and Ecology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Environmental Engineering and Science Program Department of Chemical and Environmental Engineering University of Cincinnati CincinnatiOH45221 United States Department of Environmental Engineering and Earth Science Clemson University SC29634 United States

Permanganate is a common preoxidant applied in water treatment to remove organic pollutants and to reduce the formation of disinfection by-products. However, the effect of permanganate preoxidation on the transformation of dissolved effluent organic matter (dEfOM) and on the formation of unknown chlorinated disinfection by-products (Cl-DBPs) during chlorination remains unknown at molecular level. In this work, the molecular changes of dEfOM during permanganate preoxidation and subsequent chlorination were characterized using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Permanganate preoxidation was found to decrease the DBE (double bond equivalent) and AImod (modified aromaticity index) of the dEfOM. The identity and fate of over 400 unknown Cl-DBPs during KMnO4-chlorine treatment were investigated. Most Cl-DBPs and the precursors were found to be highly unsaturated aliphatic and phenolic compounds. The Cl-DBPs precursors with lower H/C and lower O/C were preferentially removed by permanganate preoxidation. Additionally, permanganate preoxidation decreased the number of unknown Cl-DBPs by 30% and intensity of unknown Cl-DBPs by 25%. One-chlorine-containing DBPs were the major Cl-DBPs and had more CH2 groups and higher DBEw than Cl-DBPs containing two and three chlorine atoms. 60% of the Cl-DBPs formation was attributed to substitution reactions (i.e., +Cl–H, +2Cl–2H, +3Cl–3H, +ClO–H, +Cl2O3–2H). This work provides detailed molecular level information on the efficacy of permanganate preoxidation on the control of overall Cl-DBPs formation during chlorination. © 2023 Elsevier Ltd

关键词： Chlorination

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Acid-catalyzed hydrothermal treatment of sewage sludge: effects of reaction temperature and acid concentration on the production of hydrolysis by-products

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Biomass Conversion and Biorefinery 2023年第9期13卷 7533-7546页

作者： Pham, Van Toi Guan, Chung-Yu Han, Po-Chun Matsagar, Babasaheb M. Wu, Kevin C. W. Ahamad, Tansir Chang, Ching-Yuan Yu, Chang-Ping Graduate Institute of Environmental Engineering National Taiwan University Taipei106 Taiwan Faculty of Environmental Engineering National University of Civil Engineering 55 Giai Phong Hai Ba Trung Hanoi100000 Viet Nam Department of Environmental Engineering National Ilan University Yilan260 Taiwan Ph.D. Program of Green Materials and Precision Devices National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia Water Innovation Low Carbon and Environmental Sustainability Research Center National Taiwan University Taipei106 Taiwan

Sewage sludge (SS) is an organic biomass from wastewater treatment plants, but the use of SS to produce bio-based chemicals under acid-catalyzed hydrolysis (ACH) processes is not well investigated. In this study, ACH processes were performed at 120, 150, and 180 °C using sulfuric acid (H2SO4) with concentrations of 0–0.5 M within a reaction time of 90–180 min to produce bio-based chemicals from SS. The results showed that the reaction temperature, reaction time, and concentrations of H2SO4 affected the yields of sugars, levulinic acid (LA), and 5-hydroxymethylfurfural (HMF). The highest xylose and glucose yields were 7.69 mol% and 5.22 mol% at 120 °C with 0.5 M H2SO4 during the 180 min of reaction time, respectively. Besides, under the ACH process at 180 °C and 180 min, the yield of LA reached a maximum value of 0.48 mol% at 0.5 M H2SO4, and the highest yield of HMF was 1.66 mol% at 0.1 M H2SO4. The data obtained also indicated that the ACH process led to an increase in soluble chemical oxygen demand, dissolved organic carbon, and total dissolved nitrogen. Fluorescence excitation-emission matrix of dissolved organic matter and thermogravimetric analysis of the treated SS further supported the enhanced solubilization of SS after ACH process, especially under higher reaction temperature and concentrations of H2SO4. Although the lower yields of bio-based chemicals might restrict the downstream recovery of the target products, the largely improved SS solubilization by ACH suggests that acid-catalyzed hydrothermal hydrolysis process has potential as an alternative pretreatment method of SS. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Sewage sludge

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Leveraging historical datasets to quantify the recovery of an impaired stream entering Yellowstone National Park

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Discover Conservation 2025年第1期2卷 1-22页

作者： Ray, Andrew M. Yoder, Alysa M. Ertel, Brian D. Henderson, Tom H. Mebane, Christopher A. National Park Service Bozeman USA National Park Service Pecos USA Hydrologic Sciences Graduate Group Department of Land Air and Water Resources University of California Davis USA U.S. Geological Survey Oregon Water Science Center Bend USA National Park Service Yellowstone Center for Resources Native Fish Conservation Program Yellowstone National Park USA Montana Department of Environmental Quality Abandoned Mine Lands Program Helena USA Boise USA

environmental impacts from surface mining can extend beyond the lifetime of mining operations, persist for decades prior to formal clean-up, and span multiple jurisdictional boundaries. Using a case study from Soda Butte Creek which enters Yellowstone National Park, we demonstrate how existing datasets and longitudinal studies can be integrated to document early stages of recovery following reclamation. Nearly three decades of previous studies provided a baseline for biological and water quality impairments from a former mill and tailings site. Direct comparisons of water quality data, macroinvertebrate community summaries, and fish abundance data from references reaches and common locations pre- and post-reclamation were used to quantify whether desired ecological benchmarks were met and characterize rates of recovery. Our results indicated that response times of water quality, macroinvertebrates, and fish to reclamation were relatively rapid and measured in years rather than decades. Specifically, concentrations of total metals below the former mill and tailings site were lower than pre-reclamation levels. Five years post reclamation (2015 to 2019), median total iron concentrations were just 3% of levels measured the decade (2000 to 2010) before reclamation began. Macroinvertebrate metrics (richness and abundance of sensitive groups) below the former mill and tailing sites were formerly a fraction of reference conditions. Post-reclamation, total taxa richness and stonefly abundance estimates at the formerly impaired site were equal to the mean multi-reach proportional estimates for other mainstem reference sites. Lessons learned from Soda Butte Creek could be used to inform and support other data-driven assessment work.

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Distribution and drivers of co−hosts of antibiotic and metal(loid) resistance genes in the fresh−brackish−saline groundwater

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Chemosphere 2024年 365卷 143332页

作者： Xu, Xuming Chen, Huan Du, Lei Deng, Chunfang Ma, Ruoqi Li, Bin Li, Jiarui Liu, Shufeng Karthikeyan, Raghupathy Chen, Qian Sun, Weiling State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing100038 China College of Environmental Sciences and Engineering Key Laboratory of Water and Sediment Sciences Ministry of Education Peking University Beijing100871 China State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems Beijing100871 China Department of Environmental Engineering and Earth Sciences Clemson University SC29634 United States School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen518055 China General Institute of Water Resources & Hydropower Planning and Design Ministry of Water Resources Beijing100120 China Department of Agricultural Sciences Clemson University SC29634 United States

Groundwater is an essential source of drinking water and agricultural irrigation water, and its protection has become a global goal for public health. However, knowledge about heavy metal(loid) resistance genes (MRGs) in groundwater and the potential co−selection of antibiotic resistance genes (ARGs) have seldom been developed. Here, during the wet and dry seasons, we collected 66 groundwater samples (total dissolved solids = 93.9−9530 mg/L) adjacent to Baiyangdian Lake in Northern China, which presented the few metal(loid) and antibiotic contamination. We identified 160 MRGs whose composition exhibited significant seasonal variation, and dissolved metal(loid)s (particularly Ba) played a determinative role in promoting the MRGs proliferation though with relatively low concentrations, suggesting the relatively vulnerable groundwater ecosystems. Moreover, 27.4% of MRG−carrying metagenome−assembled genomes (MAGs) simultaneously carried ARGs, with the most frequently detected MRG types of Cu, Hg, and As, and ARG types of multidrug and bacitracin. Physicochemical variables, variables related to total dissolved solids, metal(loid)s, and antibiotics synthetically shaped the variation of MRG−ARG hosts in groundwater. We found that the increase of MRG−ARG hosts was critically responsible for the spread of MRGs and ARGs in groundwater. Our findings revealed the widespread co−occurrence of MRGs and ARGs in few−contaminated groundwater and highlighted the crucial roles of salinity in their propagation and transmission. © 2024

关键词： Lake pollution

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Impact of Shift from Snow to Rain on River Discharge: An Over 30 Years Study in Central Japan

SSRN

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SSRN 2024年

作者： Zhang, Bing Han, Jingyan Liu, Jianbo Zhao, Yong Tianjin Key Laboratory of Water Resources and Environment Tianjin Normal University Tianjin300387 China Earth and Environmental System Graduate School of Science and Engineering University of Toyama Toyama930-8555 Japan College of Water Conservancy Engineering Tianjin Agricultural University Tianjin300392 China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing100038 China

Rivers play a crucial role in the hydrological cycle and serve as essential freshwater resources for both human populations and ecosystems. Climate change significantly alters precipitation patterns and river discharge variability. However, the impact of climate change on precipitation types and river discharge in coastal zones remains inadequately understood. This study focuses on Toyama Prefecture, located along the Sea of Japan, as a representative coastal area. We analyzed over 30 years of datasets, including air temperature, rainfall, snowfall, and river runoff, to assess the effects of climate change on river dynamics. Our findings indicate a significant increase in air temperature at a rate of 0.2 °C per decade, with notable warming observed in late winter (January and February) and early spring (March). Furthermore, the concentration periods for rainfall and snowfall have shifted, delaying by 13 days and 2 days, respectively, before and after 2001. This transition from solid (snow) to liquid (rain) precipitation has altered the river discharge regime, modified the timing of peak discharge, and resulted in a 23% increase in flood occurrences. These findings underscore the urgent need to enhance awareness of climate change impacts on river flooding, freshwater resources, and coastal ecosystems. © 2024, The Authors. All rights reserved.

关键词： Rivers

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Produced water Treatment and Reuse Options: Alternatives for Sustainable water resources

Produced Water Treatment and Reuse Options: Alternatives for...

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2024 SPE water Lifecycle Management Conference and Exhibition, WLMC 2024

作者： Dawoud, Mohamed A. Sefelnasr, Ahmed Ebraheem, Abdel Azim Alnaimat, Fadi Mathew, Bobby Hamouda, Mohamed A. Aly Hassan, Ashraf Zubari, Waleed Khalil Sherif, Mohsen Environmental Agency of Abu Dhabi Abu Dhabi United Arab Emirates National Water and Energy Center United Arab Emirates University Al Ain United Arab Emirates Mechanical Engineering Department College of Engineering United Arab Emirates University Al Ain United Arab Emirates Department of Chemical and Petroleum Engineering United Arab Emirates University Al-Ain United Arab Emirates Department of Natural Resources and Environment College of Graduate Studies Arabian Gulf University Manama Bahrain Civil and Environmental Eng. Department College of Engineering United Arab Emirates University Al Ain United Arab Emirates

ISBN: (纸本)9781959025320

water conservation and sustainability are of utmost importance in the Abu Dhabi Emirate, and they are considered key areas of strategic significance for the United Arab Emirates. The escalating demand for freshwater resources, coupled with the absence of a proportional rise in surface and groundwater supplies, necessitates the exploration of other water sources. Among these potential alternatives, produced water (PW) holds significant promise. Nevertheless, there is a lack of comprehensive characterization of the amounts of the generated produced water, as well as the quality and management of such water in the Abu Dhabi Emirate. The primary aim of this research was to study the amount and quality of produced water (PW) connected with the oil and gas sector, with the goal of evaluating its potential contribution to the water budget of Abu Dhabi Emirate. PW refers to the water that is naturally occurring in subsurface formations and is extracted to the surface during oil or gas production operations. The composition of the fluid may include water sourced from the reservoir, water that has been previously injected into the formation, and any chemical substances that have been incorporated throughout the various stages of production. The majority of PW has a significantly high salinity level and may consist of a combination of mineral salts, organic compounds, hydrocarbons, organic acids, waxes, and oils. Additionally, it may include inorganic metals, other inorganic components, naturally occurring radioactive material, chemical additives, as well as other constituents and byproducts. A comprehensive investigation was conducted to explore a multitude of viable management methods and treatment technologies aimed at mitigating salinity, which is recognized as a significant constraint in the usage of produced water. Furthermore, an examination was conducted on the origins, features, and magnitude of several contaminants present in the PW. In addition to total volumes prod

关键词： water conservation

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