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arsenic; arsenites; biocompatible materials; colorimetry; electrochemistry; guidelines; oligonucleotides; oxidation; risk; transportation; well water; China
Abstract:
... Approximately 94 to 220 million people worldwide are at risk of drinking well water containing arsenic > 10 µg/L, the WHO guideline value. To identify non-compliant domestic wells, assess health risks and reduce exposure, accurate and rapid on-site inorganic arsenic screening methods are desirable because all domestic wells worldwide need to be tested. Here, the principles, advantages and limitati ...
... Scorodite (FeAsO₄·H₂O) is a common arsenic-bearing (As-bearing) iron mineral in near-surface environments that could immobilize or store As in a bound state. In flooded soils, microbe induced Fe(III) or As(V) reduction can increase the mobility and bioavailability of As. Additionally, humic substances can act as electron shuttles to promote this process. The dynamics of As release and diversity of ...
Bacillus (bacteria); arsenic; genes; groundwater; oxidoreductases; prokaryotic cells; China
Abstract:
... Many investigations suggest that dissimilatory arsenate-respiring prokaryotes (DARPs) play a key role in stimulating reductive mobilization of As from solid phase into groundwater, but it is not clear how environmental Mn(II) affects the DARPs-mediated reductive mobilization of arsenic. To resolve this issue, we collected soil samples from a realgar tailings-affected area. We found that there were ...
... The crisis of arsenic (As) accumulation in rhizomes threatens the quality and safety of Panax notoginseng (Burk.) F.H. Chen, which is a well-known traditional Chinese herb with a long clinical history. The uptake of arsenate (AsV) could be suppressed by supplying phosphate (Pi), in which Pi transporters play important roles in the uptake of Pi and AsV. Herein, the P . notoginseng Pi transporter-en ...
... Metals, many of which are potentially toxic, are present in the aquatic environment originated from both natural and anthropogenic sources. In these ecosystems, these elements are mostly deposited in the sediment, followed by water dissolution, potentially contaminating resident biota. Among several aquatic animals, crustaceans are considered excellent bioindicators, as they live in close contact ...
air temperature; arsenic; chlorides; dissolved oxygen; electrical conductivity; environment; freshwater; models; oxygen; regression analysis; river water; rivers; sulfates; water pollution; water quality; water temperature
Abstract:
... Water quality is a concern in most river basins worldwide due to the widespread release of pollutants which impacts the freshwater ecosystems. Exploring the relationships between drivers and water quality parameters at the regional scale is key in the identification of appropriate actions for the reduction of water pollution. Regional models are the appropriate tool to achieve this, though their d ...
... Elevated sediment-bound trace elements and iron-bearing minerals in intertidal habitats have been drawing more attention, but there is rarely a comparative study assessing these features between halophyte plants habitat and mudflats. In this paper, sediment samples were collected in S. alterniflora and the corresponding mudflat at 7 typical intertidal habitats (Chongming, Xiapu, Yueqing, Yunxiao, ...
Daniel Beene; Philip Collender; Andres Cardenas; Charles Harvey; Linden Huhmann; Yan Lin; Johnnye Lewis; Nancy LoIacono; Ana Navas-Acien; Anne Nigra; Craig Steinmaus; Alexander van Geen
... Unless a toxicant builds up in a deep compartment, intake by the human body must on average balance the amount that is lost. We apply this idea to assess arsenic (As) exposure misclassification in three previously studied populations in rural Bangladesh (n=11,224), Navajo Nation in the Southwestern United States (n=619), and northern Chile (n=630), under varying assumptions about As sources. Relat ...
aquifers; arsenic; atmospheric precipitation; environment; geostatistics; groundwater; hydrogeochemistry; kriging; probability; probability analysis; risk management; water management; Italy
Abstract:
... The concept of natural background level (NBL) aims at distinguishing the natural and anthropogenic contributions to concentrations of specific contaminants, as groundwater management and protection tools. This is usually defined as a unique value at a regional scale, even when the hydrogeological and geochemical features of a certain territory are far from homogeneous. The concentration of target ...
... Iron-manganese binary oxides (Fe-Mn oxides) have the potential to immobilize arsenite/arsenate [As(III/V)] in situ in natural environments. However, the As(III/V) immobilization performances of Fe-Mn oxides in the presence of indigenous metal-reducing bacteria in reducing groundwater systems have received limited attention. Here, As(III/V) immobilization by Fe-Mn oxides and the interactions of Fe ...
... Iron species that occur in natural surface water could affect the photochemical behavior of pollutants. Complexation between iron species and polycarboxylate or heavy metals has been widely reported, where the ligands could be oxidized via ligand-to-metal charge transfer (LMCT) by light inducement. Such complexation and photochemical reactions might also occur for low valance metal-containing orga ...
... Arsenic in acid mine drainage (AMD) is commonly associated with the bioleaching of arsenic sulfide minerals. Orpiment is iron free and one of the most common arsenic sulfide minerals, but no studies are involved with the relationship between the iron free bioleaching of orpiment and the generation of arsenic-containing AMD. In this study, the iron free bioleaching experiments with Acidithiobacillu ...
... Restoring homeostasis following proteostatic stress hinges on a stress-specific transcriptional signature. How these signatures are regulated is unknown. We use functional genomics to uncover how activating transcription factor 6 (ATF6), a central factor in the unfolded protein response, regulates its target genes in response to toxicant induced and physiological stress in the liver. We identified ...
... Adsorption is a widely used arsenic remediation technique due to its high efficacy, economic value, ease in operation and maintenance, and other multiple factors. However, the proper management of arsenic-laden spent media is one of the major challenges, which affects the sustainability of this treatment technique in field-scale implementations. This review summarizes the various adsorbents and th ...
adsorption; ambient temperature; arsenic; desorption; energy; tin
Abstract:
... The sensing performance of tin arsenic (SnAs) monolayer with adsorption of different gas molecules at room temperature was systematically investigated by the first-principle calculations. The interaction of all studied gas molecules with SnAs monolayer shows physisorption nature. The moderate adsorption energy (− 0.76 eV) and large charge transfer (0.21 e) results demonstrated that the SnAs monola ...
... Up to now, information about biogeochemistry of many trace elements is scarce. Meanwhile, all the elements are always present in soil and plants. It may be suggested that the trace elements also play certain role in the biogeochemical processes. The aim of the research was to study bioaccumulation of poorly investigated trace elements (scandium, cerium, europium, hafnium, and tantalum) and well-kn ...
acidity; adsorption; antimony; arsenic; iron oxyhydroxides; spectroscopy
Abstract:
... Coexisting antimony (Sb) and arsenic (As) have raised worldwide concerns, but the factors controlling the mobilization of Sb and As in sediments near mining areas are not fully understood. Herein, multiple leaching methods and complementary spectroscopic analyses were used to investigate the mobility of Sb and As and its controlling factors in sediments around the Xikuangshan tailings pond over a ...
... In order to explore the utilization of Eucalyptus sawdust (C) and develop its remediation potential in cadmium and arsenic contaminated soil, Eucalyptus sawdust were modified by FeCl₃ and NaOH coprecipitation (MC). Characterization technology and pot experiment were used to explore the adsorption mechanism of cadmium and arsenic by MC and the effect of soil remediation. The results showed that iro ...
... Fe–Mn binary oxide (FMBO) is a promising adsorbent for As(III) removal through combined adsorption and oxidation. The calcined oyster shell‐supported Fe–Mn binary oxide (FMBO/OS) adsorbent was synthesized by the co‐precipitation method. Results indicated that the calcined oyster shell, as a carrier, improved the stability of FMBO and its adsorption capacity for As(III). The maximum adsorption capa ...
arsenic; average daily intake; cadmium; diet recall; food composition; heavy metals; infant formulas; lead; markets; mercury; toxicity
Abstract:
... Heavy metals are compounds which exist in many food products that we consume daily, and they show a toxic effect in certain concentrations. In this study, firstly, lead, cadmium, arsenic and mercury levels in 36 samples of infant formula were determined with ICP-MS. Then, infant formula consumption data of 268 babies within the age range of 0–24 months were acquired with 24 h dietary recall method ...
... Toxic metals were identified from soil and different edible and non edible parts of Allium cepa and Daucus Carota. Results showed that there is significant metal movement from soil to vegetables. Different vegetables have different mechanism of metal sorption and uptake. Levels of heavy metals in soil were in the order of Zn>Cu>Ni>Sb>Co>Mn>As>Cd>Pb>Cr before the cultivation of vegetables i.e. Alli ...
... The present study analysed the levels of potentially toxic elements along with physico-chemical properties of agricultural soil samples (n = 59) collected from fields situated along the path of river Ganga in the middle Gangetic floodplain in two districts, Ballia and Ghazipur. Arsenic (As), chromium (Cr), copper (Cu), nickel (Ni), zinc (Zn), lead (Pb), iron (Fe) and manganese (Mn) levels were ana ...
... As the different properties of conventional copper anode slime and scrap copper anode slime (SCAS), the disposal of arsenic before the extraction process is very important. There was simultaneous leaching of As and Sn when the hydrometallurgical process or the sulfation roasting-leaching was applied to treat arsenic in the SCAS. It was difficult to achieve the effective separation of arsenic and t ...
... This study comprehensively investigated arsenic's enrichment, distribution, and characteristics in tailings. XRD and SEM-EDS characterized the phase and morphology of tailings from various smelting processes. At the same time, the embedding characteristics of arsenic in the ore phase were analyzed by EPMA. The differences between arsenic's leading ore phase carriers in different recovery processes ...
... Urban venues frequented by children, such as playgrounds, are potentially important sources of exposure to anthropogenic metal(loids). Environmental quality of outdoor playgrounds is mainly assessed through direct geochemical monitoring, which is time-consuming and expensive. In this study we adapted a multidisciplinary approach combining magnetic measurements, geochemical analyses, particle-based ...
arsenic; databases; environment; lead; manganese; maximum contaminant level; public health; toxicity; well water; North Carolina
Abstract:
... Private well users are particularly vulnerable to metal exposure as they are not protected by the Safe Drinking Water Act. In North Carolina (NC), approximately 2.4 million individuals rely on private well water. In the present study, we constructed the NCWELL database: a comprehensive database of 117,960 geocoded well water tests over twenty-years in NC inclusive of 28 metals/metalloids. The NCWE ...
... The presence of heavy metal ions in the biosphere is of grave concern, as these are toxic and impact living organisms. Lack of pure drinking water can spread waterborne diseases like cholera, dysentery, typhoid, etc. The presence of heavy metals like arsenic and radioactive materials can cause cancer. The detection and removal of these heavy metals are important for sustaining life. Herein, MXene ...
... Plants detoxify toxic metal(loid)s by accumulating diverse metabolites. Beside scavenging excess reactive oxygen species (ROS) induced by metal(loid)s, some metabolites chelate metal(loid) ions. Classically, thiol-containing compounds, especially glutathione (GSH) and phytochelatins (PCs) are thought to be the major chelators that conjugate with metal(loid)s in the cytoplasm followed by transport ...
... The environmental behavior of antimony (Sb) has recently received greater attention due to the increasing global use of Sb in a range of industrial applications. Although present at trace levels in most natural systems, elevated Sb concentrations in aquatic and terrestrial environments may result from anthropogenic activities. The mobility and toxicity of Sb largely depend on its speciation, which ...
Oryza sativa; arsenic; cultivars; field experimentation; leaves; photosynthesis; reactive oxygen species; rice; silicon; thiourea; toxicity; ultrastructure; India
Abstract:
... Thiourea (TU) is a chemo-priming agent and non-physiological reactive oxygen species (ROS) scavenger whose application has been found to reduce As accumulation in rice grains along with improved growth and yield. The present field study explored TU-mediated mechanistic changes in silicon (Si) assimilation in root/shoot, biochemical and molecular mechanisms of arsenic (As) stress amelioration in ri ...
... Among the contaminants found in groundwater, arsenic poses a great threat to human health and the ecosystem. Therefore, it is vital to eliminate arsenic from water sources. This study utilizes one of the most efficient and emerging decontamination techniques known as the sono-electrocoagulation method. In recent years, sono-electrocoagulation has attracted many scientists due to its unique feature ...
... This study aimed to determine the transfer of metals (Cd, Pb and Zn) and As to a Mediterranean forest close to five tailings ponds in Cartagena-La Union mining district (SE Spain). In addition, the effect of the rhizosphere of two native plant species, Olea europaea (OE) and Pistacia lentiscus (PL), on soil properties and chemical speciation of metal(oid)s was evaluated. Results showed there was n ...
Daniel Rodríguez-Martín; Antonio Murciano; Marta Herráiz; Patricia de Francisco; Francisco Amaro; Juan Carlos Gutiérrez; Ana Martín-González; Silvia Díaz
... A comparative analysis of toxicities of both arsenic forms (arsenite and arsenate) in the model eukaryotic microorganism Tetrahymena thermophila (ciliate protozoa) has shown the presence of various detoxification mechanisms and cellular effects comparable to those of animal cells under arsenic stress. In the wild type strain SB1969 arsenate is almost 2.5 times more toxic than arsenite. According t ...
... Arsenic (As) from various anthropogenic sources has accumulated in estuarine and coastal sediments of China in the past decade, but we know little about the overall situation of As pollution at a national scale. Here, we analysed the spatial-temporal distribution characteristics, source, fate, and potential risks of As from 11 provincial-level regions across coastal China based on reviewed data ex ...
... Arsenic-contaminated food including farmed fish is one of the main routes of human exposure. Fish farmed in contaminated environment accumulates arsenic in different tissues with great variability. Thus, it is utmost important to quantify the risk associated with different farmed fish species in arsenic-contaminated aquaculture systems. In the present study, arsenic content was measured in twelve ...
arsenic; drinking water; groundwater; pollutants; rice; seafoods; surface water; water pollution; Africa; Asia; Europe; North America; Pacific Ocean Islands; South America
Abstract:
... Arsenic poisoning constitutes a major threat to humans, causing various health problems. Almost everywhere across the world certain “hotspots” have been detected, putting in danger the local populations, due to the potential consumption of water or food contaminated with elevated concentrations of arsenic. According to the relevant studies, Asia shows the highest percentage of significantly contam ...
Pseudomonas mendocina; arsenates; arsenic; arsenites; genes; metal tolerance; oxidoreductases; pH; salt concentration; siderophores; soil; temperature; transporters; India
Abstract:
... An arsenic resistant bacteria SMSKVR-3 has been isolated from the rhizospheric soil of the metal-contaminated site of khetri copper mines situated in the Jhunjhunu district of Rajasthan, India. The strain showed homology with Pseudomonas mendocina strain ATCC 25411. This gram-negative isolate exhibited optimal growth in M9 minimal media with temperature and salt concentration as 30 °C and 0.25% (w ...
... Inorganic arsenic (iAs) and fluoride (iF) are the main inorganic pollutants in groundwater. The purpose of this study was to determine the iAs and iF concentrations in water available to the population to estimate the non-carcinogenic risks of iAs and iF exposure and the carcinogenic risk iAs exposure in residents of Tula de Allende municipality, Hidalgo, Mexico. Water iAs concentrations ranged fr ...
... A three-step bipolar membrane electrodialysis (BMED) system was used to remove arsenic and cation metals from copper slag (CS) generated during the copper ore hydrometallurgical process. The desorption kinetics results show that pH significantly influences metal desorption from CS. The Elovich model can be used to describe metal desorption. A high current density increased the metal desorption fro ...
arsenic; carbonates; carcinogenicity; geochemistry; groundwater; groundwater contamination; health effects assessments; heavy metals; ion exchange; iron oxyhydroxides; principal component analysis; risk; sewage; silicates; India
Abstract:
... This study reports new data characterizing the spatial distribution and associated health risk of As and other heavy metals in groundwater of the Haridwar district in India. Major ion geochemistry, geochemical facies, and the interdependence of several hydro-geochemical characteristics of groundwater has also been established, along with assessing the likely mechanism of As release in the region. ...
... The shrinkage of inland, alkaline, and saline lakes has caused the elevation of arsenic and uranium concentrations in lake water. However, the chemical reactions associated with these enrichments remain unclear. We conducted a five-year study of the water chemistry of Orog Lake (Mongolia) and the chemical and spectroscopic characteristics of the sediment to determine the geochemical behavior of ar ...
air pollution control; arsenic; bottom ash; coal; emissions factor; flue gas; flue gas desulfurization; fly ash; gypsum; pollution; power plants; research; temperature; wastewater
Abstract:
... The characteristics of arsenic emission and distribution of a typical Chinese coal-fired power plant renovated with ultra-low emission technique have been studied. The results showed that arsenic concentration in coal was 5.72 mg/kg, and the arsenic emissions in fly ash, bottom ash, gypsum, flue gas, and wastewater were 489.12 g/h, 5.15 g/h, 1.14 g/h, 0.46 g/h, and 0.03 g/h, respectively, correspo ...
Arce Domingo-Relloso; Anne Bozack; Samara Kiihl; Zulema Rodriguez-Hernandez; Pilar Rentero-Garrido; J. Antonio Casasnovas; Montserrat Leon-Latre; Tamara Garcia-Barrera; J. Luis Gomez-Ariza; Belen Moreno; Ana Cenarro; Griselda de Marco; Faruque Parvez; Abu B. Siddique; Hasan Shahriar; Mohammad N. Uddin; Tariqul Islam; Ana Navas-Acien; Mary Gamble; Maria Tellez-Plaza
... Associations of arsenic (As) with the sum of 5-mC and 5-hmC levels have been reported; however, As exposure-related differences of the separated 5-mC and 5-hmC markers have rarely been studied.In this study, we evaluated the association of arsenic exposure biomarkers and 5-mC and 5-hmC in 30 healthy men (43–55 years) from the Aragon Workers Health Study (AWHS) (Spain) and 31 healthy men (31–50 yea ...
DNA replication; animal models; apoptosis; arsenic; bladder; blood serum; chronic exposure; energy; environment; glycolysis; liver; mitochondria; public health; urine; viability
Abstract:
... Exposure to inorganic or organic arsenic compounds continues to pose substantial public health concerns for hundreds of millions of people around the globe. Highly exposed individuals are susceptible to various illnesses, including impairments and cancers of the lung, liver, skin and bladder. Long-term exposure to low-dose arsenic has been identified to induce aerobic glycolysis, which contributes ...
... Impact of arsenic (As) contaminated groundwater on human health, through drinking and irrigation practices, is of grave-concern worldwide. This paper present the review of various sources, processes, health effects and treatment technologies available for the removal of As from arsenic contaminated water. Groundwater with high As concentration is detrimental to human health and incidents of As con ...
... Arsenic (As) is one of the most investigated elements worldwide due to its negative impact on the natural system. Its geochemical behavior depends on several geogenic processes, which can cause hazardous enrichment into natural waters, even in remote areas, far from anthropogenic sources. In this work the arsenic pollution issue has been addressed by studying water-rock interaction processes and a ...
... Groundwater arsenic contamination has been a global threat due to its pernicious health impacts on people. Many studies have revealed the status of severe arsenic contamination and its health hazards in many districts in Terai region of Nepal. Of the many technologies available for arsenic treatment, very few are suitable for rural terai region, and the most widely used Kanchan Arsenic Filters (KA ...
Babylonia areolata; Mactra; Mytilus galloprovincialis; Pinctada margaritifera; arsenic; carcinogenicity; health effects assessments; marine pollution; risk; seafood consumption; shellfish; South China Sea
Abstract:
... The purposes of this study were to measure the concentrations of arsenic speciation in shellfish from South China Sea and evaluate the health risk by local residents through shellfish consumption. The median concentrations (in wet weight) of arsenic speciation in shellfish samples were in the following order: AsB (16.0 mg·kg⁻¹) > DMA (1.30 mg·kg⁻¹) > AsV (0.23 mg·kg⁻¹) > AsC (0.08 mg·kg⁻¹) > AsIII ...
Oryza sativa; arsenic; bioremediation; cultivars; food chain; irrigation; metabolism; pH; paddies; phosphates; plant stress; rice; soil; water management; water pollution
Abstract:
... Arsenic (As) contamination is a major environmental issue that leads to serious health risks for living organisms. Growth, development, metabolic system, and yield of crops are drastically diminished by exposure to As. Arsenic enters into the food chain through contaminated water, soil, and food. Rice is the major dietary source of food for almost 3 billion people of the world. It contains the hig ...
... Arsenic (As) is a natural contaminant that exists naturally in the earth crust and it is toxic to plant cells. Studies involving the absorption of As by plants have already been described previously. Recently, researchers have intended to understand the molecular and physiological mechanisms that intervene and interact in As absorption. The study of the metabolome in plants under As stress makes u ...