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... Selenium (Se) contamination due to industrial activities has received increasing concerns. Phytoremediation has been suggested to be an efficient and feasible way to remove Se from Se-contaminated environment. Recently, an arsenic (As) hyperaccumulator Pteris vittata L. (Chinese Brake fern) was found to be a Se accumulator. This study was carried out to investigate Se accumulation mechanisms conce ...
... The effects of 'alperujo' compost on trace element availability and on microbial activity of two contaminated soils, a calcareous soil (S1) with high contents of Pb and Zn, and an acidic soil (S2) with a substantial amount of Al, As, Pb and Zn, were assessed. Additionally, the growth and capacity for contaminant phytoextraction of five Brassica species were studied. Compost amendment did not affec ...
antioxidant activity; apoptosis; arsenic; calcium; drinking water; green tea; in vivo studies; medicinal properties; myocardium; oxidative stress; polyphenols; rats; toxicology; ultrastructure
Abstract:
... Chronic arsenic exposure in drinking water is associated with the abnormalities of cardiac tissue. Excessive generation of ROS induced by arsenic has a central role in arsenic-induced cardiotoxicity. (-)-Epigallocatechin-3-gallate (EGCG), the most abundant polyphenol in green tea, possesses a potent antioxidant capacity and exhibits extensive pharmacological activities. This study was aim to evalu ...
Citrus; arsenic; cytotoxicity; enzyme inhibitors; epithelial cells; genes; human diseases; lungs; mitogen-activated protein kinase; oxidative stress; pathogenesis; phosphatidylinositol 3-kinase; polymethoxyflavones; protein kinase C; sodium; toxic substances; ubiquitination
Abstract:
... Exogenous toxicants (e.g. arsenic, cigarette smoke), trigger oxidative stress, and initiate the pathogenesis of many human diseases. Induction of nuclear factor E2-related factor 2 (Nrf2) counteract exogenous toxicant-induced oxidative insults. Using a high-throughput screen, we firstly identified a citrus polymethoxyflavone, (2S)-5,6,7,3',4'-pentamethoxyflavanone (PMF), to be an Nrf2 activator, a ...
arsenic; chemical bonding; fluorine; germanium; hydrobromic acid; phosphine; polar compounds; polymers; silicon; tin
Abstract:
... Transphosphination reactions of (Me₃M)₃P and Me₃MPH₂ compounds (M = Si, Ge, Sn; Me = CH₃) using HE(CF₃)₂ or H₂ECF₃ (E = P, As) yield derivatives of the types Me₃ME(CF₃)₂, Me₃ME(H)CF₃, and (Me₃M)₂ECF₃, respectively. The reactivity of the different systems depends on M (Si < Ge < Sn), E (P < As), and the phosphine [Me₃MPH₂ < (Me₃M)₂PH < (Me₃M)₃P]. Me₃ME(H)CF₃ compounds undergo dismutation forming (M ...
... A series of paramagnetic (S = 3/2) chromium half-sandwiches of the type CpCrX₂D (D = donor) were synthesized by starting from [CpCrX₂]₂, Cp₂Cr, CpCrCl₂(THF), and Cp*Cr(CH₃)₂[P(CH₃)₃]. Besides the parent cyclopentadienyl (Cp) the alkylated derivatives CH₃C₅H₄, (CH₃)₅C₅ (Cp*), and C₂H₅(CH₃)₄C₅ were bound to chromium. The electronegative substituent was X = F, Cl, Br, I, and triflate, while the donor ...
... Biochar is a promising immobilizing agent of trace elements (TEs) in contaminated soils. However, several contradictory results have been reported regarding the potential of biochar to immobilize arsenic (As), chromium (Cr), and nickel (Ni) in contaminated soils. We conducted a meta-analysis on the published papers since 2006 until 2019 to examine the effects of biochar on the chemical (im)mobiliz ...
... In the Mezquital valley, untreated wastewater (45 m³ s⁻¹) from Mexico City is used for the irrigation of around 900 km²of agricultural soil. High concentrations of metals including methylmercury (3.8 ± 2.5 ng l⁻¹) and lead (0.16 ± 0.05 mg l⁻¹) were measured in anoxic wastewater canals. Downstream, dissolved, and particulate polymetallic (Hg, Pb, Cr…) concentrations decreased by factors 10 to 1,000 ...
arsenic; bioavailability; chemical analysis; chemical speciation; ferrihydrite; fluorescence; goethite; iron; iron hydroxides; mine tailings; mining; particle size; prediction; sorption; spectral analysis; spectroscopy; toxicity; weathering; California
Abstract:
... The chemical speciation and distribution of potentially toxic metal(loid)s in mine wastes is critical to assessing the risks posed by these wastes and predicting the potential bioavailability of the metal(loid)s present. Of additional potential importance is the role of particle size in the fate, transport, and toxicity of contaminated mining materials. Spectroscopic analyses of size-separated min ...
arsenic; chemical communication; chemical compounds; chemical reactions; materials; phosphorus
Abstract:
... The complexes [Cp*E{W(CO)₅}₂] (E = P, As; Cp* = C₅Me₅) react with 1,2-diphosphinobenzene to give 1,2,3-triphosphole and 2-arsa-1,3-diphosphole derivatives as reactive intermediates that dimerise to polycyclic phosphorous and arsenic containing cage compounds. ...
... Lead slags from two different metallurgical technologies (primary slag from Pb-ore processing and secondary slag from car battery recycling) were submitted to 12-year batch leaching at a L/S ratio of 10 and the leaching data were compared with the previously obtained results from a ⩽1-year leaching test. In the long-term, the Pb release is efficiently controlled by the precipitation of cerussite ( ...
air; aluminum; arsenic; coal; environmental law; governance; hydrochemistry; nickel; pH; rivers; soil pollution; total nitrogen; water; water pollution; water quality; zinc
Abstract:
... Ineffective environmental regulation of effluent discharged from an underground coal mine operation has enabled water pollution within two highly valued Australian rivers. This study investigated the impacts on water chemistry of the Bargo and Nepean rivers as a result of the continuous disposal of mine effluent from Tahmoor Colliery over a 14-month period. Coal mine effluent was saline (2180 μS/c ...
... To gain an in-depth insight into the diversity and the distribution of genes under the particular evolutionary pressure of an arsenic-rich acid mine drainage (AMD), the genes involved in bacterial arsenic detoxification (arsB, ACR3) and arsenite oxidation (aioA) were investigated in sediment from Carnoulès (France), in parallel to the diversity and global distribution of the metabolically active b ...
... Concentrations of aluminium, arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, tin and zinc were determined in samples from the 1997 UK Total Diet Study and used to estimate dietary exposures of the general UK population. Population average dietary exposures to aluminium (3.4 mg/day), arsenic (0.065 mg/day), cadmium (0.012 mg/day), chromium (0.10 mg/day), copper (1.2 mg/day), me ...
arsenic; nuclear magnetic resonance spectroscopy; protons; spectral analysis
Abstract:
... ¹H NMR spectral data of 2-diphenylamino-[1,3,2]oxathiaarsolane are presented and discussed. The protons of the CH₂-groups form an AKPX-spin system. The vicinal H-C-C-H coupling constants indicate a twist-envelope conformation. A rapid inversion at arsenic does not take place. ...
arsenic; cesium; coastal sediments; coasts; copper; highlands; hydrology; lead; mining; models; plutonium; radionuclides; salt marshes; upland soils; watersheds; zinc; Irish Sea; Isle of Man
Abstract:
... The Isle of Man, situated in the central Irish Sea, was a significant centre for Pb and Zn mineral extraction during the Industrial Revolution. Comminuted mining debris from the East Snaefell and North Laxey mining areas was transported, through hydrological action, from upland catchments to the coast. This study focuses on an eastern coastal sediment sink and a salt marsh sediment sequence from P ...
air quality; antimony; arsenic; bismuth; carbon; combustion; copper; emissions; filters; human health; lead; mining; models; particulates; pyrite; toxicity; traffic; water solubility; zinc; Spain
Abstract:
... This study is the first to perform a chemical characterization and source contribution of particulate matter (PM₁₀) occurring through the abandonment and reopening of a historical sulphide mine. This long-range analysis covers the period 2009–2017 in the Riotinto mining district (Iberian Pyrite Belt, Southwestern Spain), which is a mining district of world-class importance. This mine represents a ...
aerosols; air; air pollution; aluminum; arsenic; biomass; burning; cadmium; calcium; chromium; cobalt; copper; fractionation; humans; iron; lead; magnesium; manganese; models; nickel; potassium; respiratory system; risk; risk estimate; selenium; smoke; toxicity; zinc; South East Asia
Abstract:
... Recurring biomass burning-induced smoke haze is a serious regional air pollution problem in Southeast Asia (SEA). The June 2013 haze episode was one of the worst air pollution events in SEA. Size segregated particulate samples (2.5–1.0 μm; 1.0–0.5 μm; 0.5– 0.2 μm; and <0.2 μm) were collected during the June 2013 haze episode. PM₂.₅ concentrations were elevated (up to 329 μg/m³) during the haze epi ...
... In this study, the effect of 24-Epibrassinolide (EBL) on antioxidant system in Arabidopsis thaliana were investigated under arsenate [As(V)] stress. The enzyme activity of superoxide dismutase (SOD) and catalase (CAT), total antioxidant status, malondialdehyde (MDA) level and free proline content, as well as the expression levels of SOD isoforms (Cu-ZnSODs, FeSODs and MnSOD), CAT isoforms (CAT1, C ...
... There is an increasing demand for efficient energy storage systems in our modern mobile society for a wide range of applications such as smart grids, portable electronic devices, and electric vehicles. The performance of advanced batteries in terms of energy density, power density, cyclability, and safety is mainly determined by the primary functional components, particularly by the electrode mate ...
... Arsenic (As) is a potent environmental toxicant and chronic exposure to it results in various malignancies in humans. Oxidative stress has been implicated in the etiopathogenesis of As‐induced toxicity. This investigated the protective effect of plant antioxidant 3,4‐dihydroxybenzaldehyde (DHB) on sodium meta‐arsenite (SA), an As‐(III) compound, induced oxidative damage in human red blood cells (R ...
... Room-temperature Mössbauer spectra are reported for μ₃-RP-bridged heterometallic iron clusters of the type μ₃-RP-(C₅H₅(CO)₂Mn)Fe₂(CO)₆Lₙ. The Mössbauer parameters of these clusters show that the structures are in agreement with the lattice constants of low-spin hetero manganese-iron clusters ...
... A century of heavy metal mining in the western United States has left a legacy of abandoned mines. While large operations have left a visible reminder, smaller one and two-man operations have been overgrown and largely forgotten. We revisited an area of northern Idaho that has not had active mining since at least 1932 and probably since 1910. At three sites along each of 10 mountain streams we sam ...
... PURPOSE: Kutná Hora was a centre of medieval mining and remains an important contamination source in the present day. Surprisingly, very little attention has been paid to the associated contamination. Although some studies have been performed, the majority of information regarding contamination is only accessible in the archives and no overview has been published. The purpose of this study is to p ...
air; arsenic; cadmium; chromium; data collection; human health; humans; monsoon season; particulates; pollution; seasonal variation; toxic substances; toxicity; China
Abstract:
... Toxic elements in the atmosphere can enter and accumulate in the human body, seriously impacting human health. In this study, we analyzed a 14-year (1995–2008) measurement of three toxic elements (As, Cd and Cr) in PM₁₀ in Hong Kong, China. The pollution of these toxic elements in Hong Kong was not serious. The trend analysis showed that As and Cr in PM₁₀ increased at a statistically significant l ...
Khanghyun Lee; Changhee Han; Sang-Bum Hong; Seong-Joon Jun; Yeongcheol Han; Cunde Xiao; Zhiheng Du; Soon Do Hur; Jong Ik Lee; Claude F. Boutron; Sungmin Hong
air pollution; arsenic; coal; combustion; ice; snow; technology; toxicity; China; Europe; Greenland; North America
Abstract:
... We report the first high-resolution record of arsenic (As) observed in Greenland snow and ice for the periods 1711–1970 and 2003–2009 AD. The results show well-defined large-scale atmospheric pollution by this toxic element in the northern hemisphere, beginning as early as the 18th century. The most striking feature is an abrupt, unprecedented enrichment factor (EF) peak in the late 1890s, with an ...
air pollution; anthropogenic activities; archaeology; arsenic; bogs; copper; geochemistry; land use change; lead; mercury; metallurgy; mining; organic matter; principal component analysis; sulfur; zinc; Scotland
Abstract:
... There is now a plethora of records of atmospheric metal deposition across Europe based on total concentrations and calculated enrichment factors. However, to place such records into an archaeological context and to identify anthropogenic contamination signals more accurately, it is important to separate the signals derived from anthropogenic activities from those of a natural origin. This study pr ...
... This study sought to use concentration-time-response surfaces to show the effects of exposure to toxic (semi-)metals on peroxidase activity in higher plants as a function of exposure-concentration and exposure-time. Maize (Zea mays L.) seedlings (i.e., leaves and roots) were exposed to arsenic (as As³⁺) or aluminium (as Al³⁺) under hydroponic conditions, and their biomass and peroxidase enzyme res ...
... 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 ...
Wolfe-Simon, Felisa; Blum, Jodi Switzer; Kulp, Thomas R.; Gordon, Gwyneth W.; Hoeft, Shelley E.; Pett-Ridge, Jennifer; Stolz, John F.; Webb, Samuel M.; Weber, Peter K.; Davies, Paul C.W.; Anbar, Ariel D.; Oremland, Ronald S.
... Life is mostly composed of the elements carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Although these six elements make up nucleic acids, proteins, and lipids and thus the bulk of living matter, it is theoretically possible that some other elements in the periodic table could serve the same functions. Here, we describe a bacterium, strain GFAJ-1 of the Halomonadaceae, isolated from Mo ...
risk; mercury; body weight; probabilistic risk assessment; arsenic; uncertainty; surveys; exposure assessment; children; databases; United States; Spain
Abstract:
... A Bayesian risk assessment of the exposure of children up to 6 years of age to trace elements in the sandy substrate of municipal playgrounds in Madrid, Spain was carried out. As a first step, exposure variables and parameters were borrowed from US Environmental Protection Agency (EPA) databases. However, the use of these non-site-specific exposure data introduced a high arbitrariness in the assum ...
adolescents; adults; arsenic; children; cities; exposure models; fish consumption; human health; ingestion; refining; simulation models; temporal variation; Taiwan
Abstract:
... In the present study, a stage-classified exposure model is developed to better characterize long-term arsenic (As) accumulation of both genders of children, adolescents, and adults through tilapia consumption in Taiwan. Ingestion rate as well as elimination rate of As are treated dynamically and are used to parameterize the stage-classified accumulation model. Model simulations are carried out to ...
... • Enzymatic reduction of arsenate to arsenite is the first step in arsenate metabolism in all organisms studied. The rice genome contains two ACR2‐like genes, OsACR2.1 and OsACR2.2, which may be involved in regulating arsenic metabolism in rice. • Here, we cloned both OsACR2 genes and expressed them in an Escherichia coli strain in which the arsC gene was deleted and in a yeast (Saccharomyces cere ...
World Health Organization; X-radiation; arsenic; case studies; cooking; drinking; drinking water; gold; heavy metals; lead; mass spectrometry; mercury; mining; pollution; river water; rivers; sediments; traditional technology; water supply; Indonesia
Abstract:
... Bone River, which is located in the eastern part of Gorontalo, Indonesia, has an issue of contamination by heavy metals due to artisanal small-scale gold mine (ASGM) activities. This river is used as a source of water by inhabitants living along the river, due to the lack of another clean water supply. The purpose of this study is to investigate the concentration of As from the mining site alongsi ...
... Lunularia cruciata occupies a very basal position in the phylogenetic tree of liverworts, which in turn have been recognized as a very early clade of land plants. It would therefore seem appropriate to take L. cruciata as the startingpoint for investigating character evolution in plants’ metal(loid) response. One of the strongest evolutionary pressures for land colonization by plants has come from ...
arsenic; cadmium; paddy soils; pollution; remediation; rice; toxicology; water management; China
Abstract:
... The combined pollution of arsenic (As) and cadmium (Cd) are quite common in the polymetallic mining areas located in southern China. In the present study, field experiments were established for the purpose of exploring a simultaneous remediation strategy of rice variety-water management-contaminant immobilization on the As and Cd contamination in paddy soil. The obtained results revealed that the ...
... This study examined the levels of selected micronutrients and associated biochemical changes in rats exposed to Baygon® insecticide. Arsenic is a toxic metalloid commonly used in insecticides manufacture but unheralded. Fifteen rats, divided into three equal groups: Group I (control); group II (administered 2.5 mg/kg sodium arsenite (SA) on alternate days for four weeks); group III (exposed to 14. ...
... Inorganic and organic forms of arsenic (As), as well as omega-3 fatty acids were measured in 578 fish/seafood samples that belong to 15 species of commonly consumed seafood in Kuwait. Arsenic speciation data, with the toxicological profile of inorganic arsenic (iAs) and fish consumption rates were applied in a probabilistic risk assessment to estimate the risk from exposure to iAs. The nutritional ...
... To evaluate intensively the quality of the sediments contaminated by heavy metals and metalloids in the Xiangjiang River, 52 surface sediment samples were collected at 13 sites and different combinations of empirical and theoretical sediment quality indexes, the consensus-based sediment quality guidelines, sediment toxicity degree, and equilibrium partitioning method were applied. The average cont ...
... Trees are widely used for biomonitoring and filtering air in industrial, urban, and rural areas. This research was undertaken to examine accumulation capacities of macroelements (Ca, K, Mg, Na) and trace metals (As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn) in needles and bark of Pinus sylvestris and leaves and bark of Quercus petraea growing in the vicinity of the chlor-alkali plant PCC Rokita in Brzeg ...
... Little has been published about the interactions of metals and parasites in economically important aquaculture species, particularly shellfish. Metal bioaccumulation and parasitic diseases could vary in different species depending on temperature changes and other environmental factors. Most studies conducted on endoparasites, such as acanthocephalans, cestodes, nematodes, and trematodes, indicate ...
... Transplants of the mosses Hypnum cupressiforme and Pseudoscleropodium purum used as active biomonitors of airborne trace elements were compared in a survey carried out at Trieste (NE Italy). Twelve elements were considered: Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Ti, V, Zn. Water-washed materials of H. cupressiforme and P. purum, collected in a remote area to prepare transplants, showed comparable con ...
... The need for cost-effective adsorbents of inorganic arsenic (As(III) and As(V)) stimulates the academia to synthesize and test novel materials that can be profitably applied at large-scale in most affected areas worldwide. In this study, four different layered double hydroxides (Cu-Al-, Mg-Al-, Mg-Fe- and Zn-Al-LDH), previously synthesized and studied for As(III) removal capacity, were evaluated a ...
David I. Schlipalius; Nicholas Valmas; Andrew G. Tuck; Rajeswaran Jagadeesan; Li Ma; Ramandeep Kaur; Anita Goldinger; Cameron Anderson; Jujiao Kuang; Steven Zuryn; Yosep S. Mau; Qiang Cheng; Patrick J. Collins; Manoj K. Nayak; Horst Joachim Schirra; Massimo A. Hilliard; Paul R. Ebert
... Dissecting Phosphine Resistance Worldwide populations of pest insects—such as the lesser grain borer, Rhyzopertha dominica , and the rust-red flour beetle, Tribolium castaneum —have become highly resistant to the fumigant phosphine, providing a potential threat to global food security. The nematode, Caenorhabditis elegans is vulnerable to phosphine, but phosphine-resistant strains are known. Schli ...
... Part 1 of this study summarizes data for a field investigation of contaminant concentration variability within individual, discrete soil samples (intra-sample variability) and between closely spaced, “co-located” samples (inter-sample variability). Hundreds of discrete samples were collected from three sites known respectively to be contaminated with arsenic, lead, and polychlorinated biphenyls. I ...
... The discovery of the arsenic hyperaccumulator, Pteris vittata (Chinese brake fern), has contributed to the promotion of its application as a means of phytoremediation for arsenic removal from contaminated soils and water. Understanding the mechanisms involved in arsenic tolerance and accumulation of this plant provides valuable tools to improve the phytoremediation efficiency. In this review, the ...
... This review is focused on current information of avoidable environmental pollution and occupational exposure as causes of cancer. Approximately 2% to 8% of all cancers are thought to be due to occupation. In addition, occupational and environmental cancers have their own characteristics, e.g., specific chemicals and cancers, multiple factors, multiple causation and interaction, or latency period. ...
... The efficiency of gypsum, as a dissolved organic carbon (DOC) coagulator, for the simultaneous immobilization of two heavy metals (Cd and Pb) and one metalloid (As) in agricultural soils near an abandoned mining site was examined. The agricultural soil was defined as long-term contaminated as As (1540mgkg−1), Cd (55mgkg−1) and Pb (1283mgkg−1) concentrations exceeded the Korean guideline values for ...
... Our work aimed at extending the search for the trace elements (TE) abnormalities in patients with lung cancer and in healthy controls who smoke, and also for evidence of a possible association between lung cancer and TE. The analysis of the hair from patients with Stage-IIIB non-small cell lung cancer (group 1) and healthy controls (group 2) were analyzed using the inductively coupled plasma mass ...