keyword
https://read.qxmd.com/read/36133949/meso-and-macroporous-silica-based-arsenic-adsorbents-effect-of-pore-size-nature-of-the-active-phase-and-silicon-release
#21
JOURNAL ARTICLE
Marco Sanna Angotzi, Valentina Mameli, Claudio Cara, Konstantin B L Borchert, Christine Steinbach, Regine Boldt, Dana Schwarz, Carla Cannas
Arsenic pollution in ground and drinking water is a major problem worldwide due to the natural abundance of arsenic by dissolution from ground sediment or mining activities from anthropogenic activities. To overcome this issue, iron oxides as low-cost and non-toxic materials, have been widely studied as efficient adsorbents for arsenic removal, including when dispersed within porous silica supports. In this study, two head-to-head comparisons were developed to highlight the As(v)-adsorptive ability of meso- and macrostructured silica-based adsorbents...
October 27, 2021: Nanoscale advances
https://read.qxmd.com/read/35976585/health-risk-assessment-and-geospatial-analysis-of-arsenic-contamination-in-shallow-aquifer-along-ravi-river-lahore-pakistan
#22
JOURNAL ARTICLE
Syed Umair Shahid, Naeem Akhtar Abbasi, Areej Tahir, Sajjad Ahmad, Sajid Rashid Ahmad
The exposure variation of arsenic from different ground and surface water sources has remained unpredictable which may cause severe human health problems. The current study is, therefore, designed to analyze the spatial variability of arsenic contamination in shallow aquifer and assess the potential human health risks. For this purpose, a total of 55 groundwater, 10 drain water, 4 river water, and 6 sediment samples were collected along zero to 5 km stretch of the River Ravi, Lahore. All water samples were tested for As, pH, and total dissolved solids (TDS), whereas sediments were only tested for As...
August 17, 2022: Environmental Science and Pollution Research International
https://read.qxmd.com/read/35974925/an-insight-into-efflux-mediated-arsenic-resistance-and-biotransformation-potential-of-enterobacter-cloacae-rsc3-from-arsenic-polluted-area
#23
JOURNAL ARTICLE
Reeta Bhati, Smitha Mony Sreedharan, Asfa Rizvi, Mohammad Saghir Khan, Rajni Singh
Indiscriminate discharge of heavy metals/metalloids from different sources into the sustainable agro-ecosystem is a major global concern for food security and human health. Arsenic (As), categorized as group one human carcinogen is a quintessential toxic metalloid that alters the microbial compositions and functions, induce physiological and metabolic changes in plants and contaminate surface/ground water. The management of arsenic toxicity, therefore, becomes imminent. Acknowledging the arsenic threat, the study was aimed at identifying arsenic resistant bacteria and evaluating its arsenic removal/detoxification potential...
September 2022: Indian Journal of Microbiology
https://read.qxmd.com/read/35956672/development-of-adsorptive-membranes-for-selective-removal-of-contaminants-in-water
#24
JOURNAL ARTICLE
Priyalatha M Kirisenage, Syed M Zulqarnain, Jordan L Myers, Bradley D Fahlman, Anja Mueller, Itzel Marquez
The presence of arsenic and ammonia in ground and surface waters has resulted in severe adverse effects to human health and the environment. Removal technologies for these contaminants include adsorption and membrane processes. However, materials with high selectivity and pressure stability still need to be developed. In this work, adsorbents and adsorptive membranes were prepared using nanostructured graphitic carbon nitride decorated with molecularly imprinted acrylate polymers templated for arsenate and ammonia...
August 2, 2022: Polymers
https://read.qxmd.com/read/35899623/controls-of-geochemical-and-hydrogeochemical-factors-on-arsenic-mobility-in-the-hetao-basin-china
#25
JOURNAL ARTICLE
Zhuo Zhang, Huaming Guo, Shuangbao Han, Zhipeng Gao, Xiaotong Niu
High arsenic (As) groundwater is frequently found in inland basins, but little is known about As pools in sediments and their influences on aqueous As distributions. The Hetao Basin is a typical inland basin, where groundwater As concentrations generally increase from alluvial fans to flat plain. Two sites are only 1700 m apart, but groundwater As concentrations at the depth range of 15-80 m are quite different, ranging from 7.0 to 31.7 μg/L at site B1 and from 5.2 to 99.8 μg/L at site B2. Sediment geochemistry and groundwater hydrochemistry at two sites were characterized...
July 28, 2022: Ground Water
https://read.qxmd.com/read/35896478/aquifer-storage-and-recovery-asr-for-ecosystem-restoration-kissimmee-river-asr-system-florida
#26
June E Mirecki
Aquifer storage and recovery (ASR) is a major water storage and management component in the Comprehensive Everglades Restoration Plan (CERP). In south Florida, the high permeabilities of Eocene and Oligocene marine limestones, with a thick overlying confining unit are a well-suited for ASR. The Kissimmee River ASR (KRASR) system, located at the confluence of the Kissimmee River and Lake Okeechobee, was a CERP "pilot system" to evaluate ASR feasibility at interior locations. Four recharge-storage-recovery cycles of increasing duration and volume were completed between 2009 and 2013...
September 2022: Ground Water
https://read.qxmd.com/read/35788945/acid-water-ground-nano-realgar-is-superior-to-crude-realgar-in-promoting-apoptosis-of-mcf-7-breast-cancer-cells
#27
JOURNAL ARTICLE
Juan Xi, Jia-Hui Fang, Xiao-Mei Xiong, Chun Gui, Yu-Xue Wang, Xiu-Qiao Zhang
OBJECTIVE: Realgar is a traditional mineral Chinese medicine with antitumor effects, but it has high toxicity and low efficacy in its crude form. The purpose of this study was to optimize realgar to increase its efficacy and therapeutic potential. METHODS: Crude realgar (CR) was mechanically ground to obtain nano-realgar (NR), and then nano-realgar processed products (NRPPs) were obtained using three different traditional Chinese medicine processing methods: grinding in water, acid water, and alkali water, respectively...
August 2022: Current Medical Science
https://read.qxmd.com/read/35705549/plant-tissue-characteristics-of-miscanthus-x-giganteus
#28
JOURNAL ARTICLE
Oliva Pisani, Dan Liebert, Timothy C Strickland, Alisa W Coffin
As part of a study identifying relationships between environmental variables and insect distributions within a bioenergy crop, giant miscanthus (Miscanthus x giganteus) samples were collected in October 2016 at 33 locations within a field in southeast Georgia, USA. At each location, one plant sample was collected every 3 to 4 m along a 15 m transect, resulting in 5 replicates per sampling location. The plant samples were separated into leaves and stems, dried, and ground. The chemical composition of the ground material was assessed by measuring total carbon and nitrogen, total macro- and micronutrients (aluminum, arsenic, boron, calcium, cadmium, cobalt, chromium, copper, iron, potassium, magnesium, manganese, molybdenum, sodium, nickel, phosphorus, lead, sulfur, selenium, silicon, titanium, vanadium, and zinc) using Inductively Coupled Plasma with Optical Emission Spectroscopy (ICP-OES), and optical characteristics of the water extractable organic matter (WEOM) using UV-Visible and Fluorescence Excitation Emission Matrix (EEM) spectroscopy...
June 15, 2022: Scientific Data
https://read.qxmd.com/read/35674977/heavy-metal-contamination-in-river-water-sediment-groundwater-and-human-blood-from-kanpur-uttar-pradesh-india
#29
JOURNAL ARTICLE
Varsha Gupta, Dinesh Kumar, Anamika Dwivedi, Umesh Vishwakarma, D S Malik, Seema Paroha, Narendra Mohan, Neelima Gupta
Exponential industrialization and anthropogenic activities have resulted in water contamination by various heavy metals in Kanpur city, India. Heavy metal pollution, an issue of great concern, is not only affecting river water, but contamination of groundwater is creating health issues and worries. In the present investigation, blood samples were collected from selected volunteers, water and sediment samples from four sites of river Ganga and drinking groundwater samples from 23 locations of Kanpur city. Heavy metals analysis in river water, sediment, and human blood, was done by inductively coupled plasma optical emission spectroscopy (ICP-OES) and atomic absorption spectroscopy (AAS) was used for groundwater samples...
June 8, 2022: Environmental Geochemistry and Health
https://read.qxmd.com/read/35551993/sex-differences-in-antioxidant-gene-expression-in-response-to-chronic-arsenic-exposure
#30
JOURNAL ARTICLE
Savannah R Berry, Sara R Dresler, Catherine R Propper, Robert S Kellar, Tinna Traustadóttir
Inorganic arsenic is highly toxic metalloid considered a water contaminant that is naturally occurring through geological formations where it leaches into ground water sources and is anthropogenically sourced through pollution and found in surface water as a contaminant. Acute and chronic arsenic exposure can stimulate the production of reactive oxygen species and increase systemic oxidative stress. The aim of the present study was to investigate sex differences in the redox response induced by chronic arsenic exposure in a murine model...
May 2022: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://read.qxmd.com/read/35453374/arsenic-toxicity-on-metabolism-and-autophagy-in-adipose-and-muscle-tissues
#31
REVIEW
Seung-Hyun Ro, Jiyoung Bae, Yura Jang, Jacob F Myers, Soonkyu Chung, Jiujiu Yu, Sathish Kumar Natarajan, Rodrigo Franco, Hyun-Seob Song
Arsenic, a naturally occurring metalloid derived from the environment, has been studied worldwide for its causative effects in various cancers. However, the effects of arsenic toxicity on the development and progression of metabolic syndrome, including obesity and diabetes, has received less attention. Many studies suggest that metabolic dysfunction and autophagy dysregulation of adipose and muscle tissues are closely related to the development of metabolic disease. In the USA, arsenic contamination has been reported in some ground water, soil and grain samples in major agricultural regions, but the effects on adipose and muscle tissue metabolism and autophagy have not been investigated much...
March 31, 2022: Antioxidants (Basel, Switzerland)
https://read.qxmd.com/read/35407779/improved-on-site-characterization-of-arsenic-in-gypsum-from-waste-plasterboards-using-smart-devices
#32
JOURNAL ARTICLE
Masamoto Tafu, Juna Nakamura, Momoka Tanii, Saori Takamatsu, Atsushi Manaka
The impurities in waste plasterboards, a product of ethical demolition, are a serious problem for their recycling. Plasterboards, the wall materials used in old buildings, are often recycled into gypsum powder for various applications, including ground stabilization. However, this powder contains various chemical impurities from the original production process of the gypsum itself, and such impurities pose a risk of polluting the surrounding soil. Here, we present a simple method for verifying the presence of arsenic, a harmful element in recycled gypsum that is suitable for use at demolition sites...
March 26, 2022: Materials
https://read.qxmd.com/read/35364042/new-insights-in-factors-affecting-ground-water-quality-with-focus-on-health-risk-assessment-and-remediation-techniques
#33
JOURNAL ARTICLE
Vidhi Kayastha, Jimit Patel, Niraj Kathrani, Sunita Varjani, Muhammad Bilal, Pau Loke Show, Sang-Hyoun Kim, Elza Bontempi, Shashi Kant Bhatia, Xuan-Thanh Bui
Groundwater is considered as the primary source of water for the majority of the world's population. The preponderance of the nation's drinking water, as well as agricultural and industrial water, comes from groundwater. Groundwater level is becoming increasingly challenging to replenish due to climate change. Fertilizer application and improper processing of industrial waste are the two major anthropogenic drivers of groundwater pollution. Arsenic and cadmium are two of the principal heavy metal pollutants that have affected groundwater quality by human activity...
March 29, 2022: Environmental Research
https://read.qxmd.com/read/35101806/factors-influencing-sorption-of-trace-elements-in-contaminated-waters-onto-ground-nut-shells
#34
JOURNAL ARTICLE
Paula Figueira, Carlos Vale, Eduarda Pereira
Biosorbent materials such as nut shells has been considered a promising alternative to the classic methods to remove potentially toxic elements from contaminated waters, improving water quality for other uses. The present study evaluated the sorption capacity of almond, hazelnut, pistachio and walnut shells for the single and simultaneous removal of As, Cd, Co, Hg, Ni, Pb and Zn from contaminated waters. The influence of key parameters such as sorbent dose, ionic strength (ultrapure water vs. mineral water), element competition (mono-vs...
January 28, 2022: Journal of Environmental Management
https://read.qxmd.com/read/34951475/mapped-predictions-of-manganese-and-arsenic-in-an-alluvial-aquifer-using-boosted-regression-trees
#35
JOURNAL ARTICLE
Katherine J Knierim, James A Kingsbury, Kenneth Belitz, Paul E Stackelberg, Burke J Minsley, J R Rigby
Manganese (Mn) concentrations and the probability of arsenic (As) exceeding the drinking-water standard of 10 μg/L were predicted in the Mississippi River Valley alluvial aquifer (MRVA) using boosted regression trees (BRT). BRT, a type of ensemble-tree machine-learning model, were created using predictor variables that affect Mn and As distribution in groundwater. These variables included iron (Fe) concentrations and specific conductance predicted from previously developed BRT models, groundwater flux and age estimates from MODFLOW, and hydrologic characteristics...
December 24, 2021: Ground Water
https://read.qxmd.com/read/34810009/nanomaterials-as-adsorbents-for-as-iii-and-as-v-removal-from-water-a-review
#36
JOURNAL ARTICLE
Melvin S Samuel, E Selvarajan, Ankur Sarswat, Harshiny Muthukumar, Jaya Mary Jacob, Malavika Mukesh, Arivalagan Pugazhendhi
Freshwater demand will rise in the next couple of decades, with an increase in worldwide population growth and industrial development. The development activities, on one side, have increased the freshwater demand. However, the ground water has been degraded. Among the various organic and inorganic contaminants, arsenic is one of the most toxic elements. Arsenic contamination in ground waters is a major issue worldwide, especially in South and Southeast Asia. Various methods have been applied to provide a remedy to arsenic contamination, including adsorption, ion exchange, oxidation, coagulation-precipitation and filtration, and membrane filtration...
October 23, 2021: Journal of Hazardous Materials
https://read.qxmd.com/read/34801310/mechanochemically-synthesized-fe-mn-binary-oxides-for-efficient-as-iii-removal-insight-into-the-origin-of-synergy-action-from-mutual-fe-and-mn-doping
#37
JOURNAL ARTICLE
Huimin Hu, Qiwu Zhang, Chao Wang, Min Chen, Mengfei Chen
Iron manganese oxide resources are widely derived from the geological structure, and their combinations play an important role in the migration and transformation of arsenic. Iron oxide and manganese oxide exist generally in a mixed state in Fe-Mn oxides synthesized via the well studied co-precipitation methods using potassium permanganate and manganese/iron sulfates. Herein, a newly designed Fe-Mn-O compositing oxide with Fe-MnO2 , Mn-Fe2 O3 , (Fe0.67 Mn0.33 )OOH solid solution and FeOOH as the main components, simply through solvent-free mechanical ball milling pyrolusite (MnO2 ) and ferrihydrite (FeOOH) together has been reported...
November 10, 2021: Journal of Hazardous Materials
https://read.qxmd.com/read/34713399/arsenic-biotransformation-and-mobilization-the-role-of-bacterial-strains-and-other-environmental-variables
#38
REVIEW
Aminu Darma, Jianjun Yang, Elke Bloem, Katarzyna Możdżen, Peiman Zandi
Over several decades, arsenic (As) toxicity in the biosphere has affected different flora, fauna, and other environmental components. The majority of these problems are linked with As mobilization due to bacterial dissolution of As-bearing minerals and its transformation in other reservoirs such as soil, sediments, and ground water. Understanding the process, mechanism, and various bacterial species involved in these processes under the influence of some ecological variables greatly contributes to a better understanding of the fate and implications of As mobilization into the environments...
October 28, 2021: Environmental Science and Pollution Research International
https://read.qxmd.com/read/34601037/biochar-composite-with-microbes-enhanced-arsenic-biosorption-and-phytoextraction-by-typha-latifolia-in-hybrid-vertical-subsurface-flow-constructed-wetland
#39
JOURNAL ARTICLE
Sana Irshad, Zuoming Xie, Muhammad Kamran, Asad Nawaz, Faheem, Sajid Mehmood, Huma Gulzar, Muhammad Hamzah Saleem, Muhammad Rizwan, Zaffar Malik, Aasma Parveen, Shafaqat Ali
Arsenic contamination of ground water is a worldwide issue, causing a number of ailments in humans. As an engineered and integrated solution, a hybrid vertical subsurface flow constructed wetland (VSSF-CW) amended with BCXZM composite (Bacillus XZM immobilized on rice husk biochar), was found effective for the bioremediation of arsenic contaminated water. Biological filter was prepared by amending top 3 cm of VSSF-CW bed with BCXZM. This filter scavenged ∼64% of total arsenic and removal efficiency of ∼95% was achieved by amended and planted (As + P + B) VSSF-CW, while non-amended (As + P) VSSF-CW showed a removal efficiency of ∼55%...
September 30, 2021: Environmental Pollution
https://read.qxmd.com/read/34474375/a-comprehensive-review-of-adaptations-in-plants-under-arsenic-toxicity-physiological-metabolic-and-molecular-interventions
#40
REVIEW
Aarifa Nabi, M Naeem, Tariq Aftab, M Masroor A Khan, Parvaiz Ahmad
Arsenic (As) is recognized as a toxic metalloid and a severe threat to biodiversity due to its contamination. Soil and groundwater contamination with this metalloid has become a major concern. Large fractions of cultivable lands are becoming infertile gradually due to the irrigation of As contaminated water released from various sources. The toxicity of As causes the generation of free radicals, which are harmful to cellular metabolism and functions of plants. It alters the growth, metabolic, physiological, and molecular functions of the plants due to oxidative burst...
August 23, 2021: Environmental Pollution
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