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Environmental Geochemistry and Health

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https://www.readbyqxmd.com/read/30022342/risk-assessment-and-copper-geochemistry-of-an-orchard-irrigated-with-mine-water-a-case-study-in-the-semiarid-region-of-brazil
#1
Daniel P Oliveira, Gabriel N Nóbrega, Francisco Ruiz, Fábio Perlatti, Arlete A Soares, Xosé L Otero, Tiago O Ferreira
This study aimed to evaluate mine water reuse, elucidating the potential problems related to trace metal biogeochemistry focusing on Cu dynamics in water, soil, and plants. Water samples were collected from a Cu mine and a reservoir used to store mine water. Additional samples were taken from soils from an uncultivated area and a banana orchard (irrigated with mine water for at least 10 years) and plant from the irrigated area. The following parameters were analyzed: pH, redox potential, dissolved ions in water samples (e...
July 18, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/30019202/reactive-transport-of-arsenic-enriched-geothermal-spring-water-into-a-sedimentary-aquifer
#2
Chen-Wuing Liu
The movement of high-arsenic (As)-concentration Beitou geothermal spring water up to 4600 μg/L from the upstream area may affect the downstream Guandu plain and Guandu wetland. The major As pathway is via the subsurface flow. The study assesses the fate and transport of As-enriched geothermal spring water in the Beitou-Guandu area. The groundwater head and flow field velocity are first simulated by using HYDROGEOCHEM-fluid flow model. The steady state flow field is well-calibrated with root mean square error 1...
July 17, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/30006853/spatiotemporal-distribution-and-dynamic-modeling-of-atmospheric-gaseous-polycyclic-aromatic-hydrocarbons-in-a-rapidly-urbanizing-city-nanjing-china
#3
Baojie Li, Shaohua Wu, Shenglu Zhou, Teng Wang, Chunhui Wang
Multiple studies have evaluated the concentration and lung cancer risk of polycyclic aromatic hydrocarbons (PAHs). However, the monitoring and dynamic modeling of PAHs with a high resolution were relatively insufficient. We investigated the spatiotemporal distribution of gaseous PAH concentrations using passive air samplers with high sampling density in an industrial city of Nanjing, China (January and October 2015) and found that the gaseous PAH concentrations in western Nanjing were higher than those in eastern Nanjing, mainly because of emission source distribution and wind action...
July 13, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/30003448/distribution-and-assessment-of-mercury-hg-in-surface-sediments-of-futian-mangrove-forest-china
#4
Zhiyuan Niu, Ye Cao, Wenli Zhao, Ruili Li
To investigate the distribution of mercury (Hg) in Futian mangrove wetland, surface sediments from land to sea were collected, including Kandelia obovata, Avicennia marina, Sonneratia caseolaris, and mud flat. The ecological risks of Hg in sediments were also assessed. The results showed that mangrove forests acidified sediments and promoted the accumulation of salinity and organic matter in sediments. Hg concentrations in both mangrove forests (154.7-218.4 ng g-1 ) and mud flat sediments (226.3-251.9 ng g-1 ) surpassed the background level (71...
July 12, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29995192/salar-del-hombre-muerto-source-of-lithium-tolerant-bacteria
#5
Fabiana Lilian Martínez, Ingrid Georgina Orce, Verónica Beatriz Rajal, Verónica Patricia Irazusta
The Salar del Hombre Muerto is a flat salt with great microbial activity despite the existing extreme conditions like high altitude, lack of water, low level of oxygen, high radiation and high concentration of sodium and lithium chloride. Despite these unfavorable conditions, we found microbial diversity with the presence of fungi, algae, and bacteria. From aqueous solutions and soil samples, a total of 238 bacteria were isolated and 186 of them were able to grow in the presence of salt. About 30% of the strains showed the ability to grow in solid medium proximally to a LiCl solution close to saturation (636 g/L)...
July 11, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29992452/sediment-quality-elemental-bioaccumulation-and-antimicrobial-properties-of-mangroves-of-indian-sundarban
#6
Madhurima Bakshi, Somdeep Ghosh, S S Ram, M Sudarshan, Anindita Chakraborty, Jayanta Kumar Biswas, Sabry M Shaheen, Nabeel Khan Niazi, Jörg Rinklebe, Punarbasu Chaudhuri
Mangroves have wide applications in traditional medicines due to their several therapeutic properties. Potentially toxic elements (PTEs), in mangrove habitats, need serious concern because of their toxicity, bioaccumulation capacity and ecotoxicological risks. In the current study, we aimed to examine sediment quality and bioaccumulation of PTEs in a mangrove-dominated habitat of Sundarban, India, and their relation with antimicrobial property of ten mangrove species of the region. Antimicrobial activity of different solvent fractions of mangrove leaves was assessed against seven microorganisms...
July 10, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29987496/interactive-effects-of-single-binary-and-trinary-trace-metals-lead-zinc-and-copper-on-the-physiological-responses-of-kandelia-obovata-seedlings
#7
Xiaoxue Shen, Ruili Li, Minwei Chai, Shanshan Cheng, Zhiyuan Niu, Guo Yu Qiu
Heavy metals are considered important environmental contaminants, and their mixture toxicity on plants has complex mutual interactions. The interactive effects of heavy metals on growth, photosynthetic parameters, lipid peroxidation and compatible osmolytes were studied in Kandelia obovata grown for 5 months in sediment treated with combinations of lead (Pb), zinc (Zn) and copper (Cu). The results showed no significant reduction of biomass under heavy metal stresses, except for decreased root biomass under higher Pb + Cu treatment, indicating high tolerance of K...
July 9, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29987495/inhalation-exposure-and-potential-health-risk-estimation-of-lanthanides-elements-in-pm-2-5-associated-with-rare-earth-mining-areas-a-case-of-baotou-city-northern-china
#8
Kexin Li, Tao Liang, Lingqing Wang, Shuhan Tian
Particulate pollution, especially PM2.5 (particles with an aerodynamic equivalent diameter of 2.5 μm or less), has received increased attention in China recently. In this study, PM2.5 samples were collected in August 2013 and April 2014 from different regions of Baotou, the largest rare earth elements (REEs) processing city in northern China. The concentrations and distribution patterns of REEs in PM2.5 were analyzed, and the inhalation exposure to REEs associated with PM2.5 was assessed. The results showed that the REEs levels were 56...
July 9, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29982907/application-of-enrichment-factor-geoaccumulation-index-and-ecological-risk-index-in-assessing-the-elemental-pollution-status-of-surface-sediments
#9
Ley Juen Looi, Ahmad Zaharin Aris, Fatimah Md Yusoff, Noorain Mohd Isa, Hazzeman Haris
Sediment can accumulate trace elements in the environment. This study profiled the magnitude of As, Ba, Cd, Co, Cu, Cr, Ni, Pb, Se, and Zn pollution in surface sediments of the west coast of Peninsular Malaysia. Trace elements were digested using aqua regia and were analyzed using the inductively coupled plasma-mass spectrometry. The extent of elemental pollution was evaluated using with the enrichment factor (EF) and geoaccumulation index (Igeo ). This study found that the elemental distribution in the sediment in descending order was Zn > Ba > Cr > Pb > Cu > As > Ni > Co > Se > Cd...
July 7, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29982906/factors-controlling-organic-matter-composition-and-trophic-state-in-seven-tropical-estuaries-along-the-west-coast-of-india
#10
M Nageswar Rao, Anirudh Ram, U K Pradhan, V Siddaiah
To understand the organic matter (OM) sources and trophic states, spatial and seasonal (post-monsoon and pre-monsoon) variation in sedimentary OM compositions was investigated in seven tropical estuaries of the state of Maharashtra along the central west coast of India. Based on the result of cluster analysis, estuaries were segregated into two distinct groups: Northern Maharashtra and Southern Maharashtra owing to dissimilarity in OM characteristics potentially constrained by geomorphology and catchment properties...
July 7, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29981015/source-patterns-and-contamination-level-of-polycyclic-aromatic-hydrocarbons-pahs-in-urban-and-rural-areas-of-southern-italian-soils
#11
Matar Thiombane, Stefano Albanese, Marcello Di Bonito, Annamaria Lima, Daniela Zuzolo, Roberto Rolandi, Shihua Qi, Benedetto De Vivo
Polycyclic aromatic hydrocarbons (PAHs) are a group of persistent organic pollutants. They have been identified as a type of carcinogenic substance and are relatively widespread in environment media such as air, water and soils, constituting a significant hazard for human health. In many parts of the world, PAHs are still found in high concentrations despite improved legislation and monitoring, and it is therefore vital defining their profiles, and assessing their potential sources. This study focused on a large region of the south of Italy, where concentration levels, profiles, possible sources and toxicity equivalent quantity (TEQ) level of sixteen PAHs were investigated...
July 6, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29981014/toxicity-effects-and-biomarkers-of-tebufenozide-exposure-in-yuukianura-szeptyckii-collembola-neanuridae
#12
Yun-Sik Lee, Sung-Eun Lee, Jino Son, Yongeun Kim, June Wee, Kijong Cho
Tebufenozide is an insect growth regulator used to control pest caterpillar populations. As an ecdysone agonist, tebufenozide is equally toxic to several non-target arthropod species, binding the receptor sites of the molting hormone 20-hydroxyecdysone and causing premature and lethal molting. In this study, the toxic effects of tebufenozide were assessed, and biomarkers of tebufenozide exposure were identified, in the non-target soil collembolan species Yuukianura szeptyckii. Adult mortality and reproduction in Y...
July 6, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29936672/effects-of-conversion-of-mangroves-into-gei-wai-ponds-on-accumulation-speciation-and-risk-of-heavy-metals-in-intertidal-sediments
#13
Rongyu Li, Guo Yu Qiu, Minwei Chai, Xiaoxue Shen, Qijie Zan
Mangroves are often converted into gei wai ponds for aquaculture, but how such conversion affects the accumulation and behavior of heavy metals in sediments is not clear. The present study aims to quantify the concentration and speciation of heavy metals in sediments in different habitats, including gei wai pond, mangrove marsh dominated by Avicennia marina and bare mudflat, in a mangrove nature reserve in South China. The results showed that gei wai pond acidified the sediment and reduced its electronic conductivity and total organic carbon (TOC) when compared to A...
June 23, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29936671/fertilizer-usage-and-cadmium-in-soils-crops-and-food
#14
M W C Dharma-Wardana
Phosphate fertilizers were first implicated by Schroeder and Balassa (Science 140(3568):819-820, 1963) for increasing the Cd concentration in cultivated soils and crops. This suggestion has become a part of the accepted paradigm on soil toxicity. Consequently, stringent fertilizer control programs to monitor Cd have been launched. Attempts to link Cd toxicity and fertilizers to chronic diseases, sometimes with good evidence, but mostly on less certain data are frequent. A re-assessment of this "accepted" paradigm is timely, given the larger body of data available today...
June 23, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29934779/characterizing-the-composition-and-evolution-of-firework-related-components-in-air-aerosols-during-the-spring-festival
#15
Keying Wu, Ming Duan, Hefan Liu, Zihang Zhou, Ye Deng, Danlin Song, Qinwen Tan
To examine the impacts of fireworks, size-resolved PM samples were collected using a single-particle aerosol mass spectrometer before, during and after the Spring Festival in a megacity in Chengdu, China. Chemical composition and atmospheric behavior of urban particles were studied. Ten major single particle types were resolved with ART-2a algorithm including elemental and organic carbon (ECOC), EC, OC, levoglucosan (LEV), high molecular weight organic molecules (HOM), hard metal (HM), K rich, Na rich and SiO3 - ...
June 22, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29934778/cytotoxicity-induced-by-the-mixture-components-of-nickel-and-poly-aromatic-hydrocarbons
#16
Injeong Kim, Yeseul Lee, Sang Don Kim
Although particulate matter (PM) is composed of various chemicals, investigations regarding the toxicity that results from mixing the substances in PM are insufficient. In this study, the effects of low levels of three PAHs (benz[a]anthracene, benzo[a]pyrene, and dibenz[a,h]anthracene) on Ni toxicity were investigated to assess the combined effect of Ni-PAHs on the environment. We compared the difference in cell mortality and total glutathione (tGSH) reduction between single Ni and Ni-PAHs co-exposure using A549 (human alveolar carcinoma)...
June 22, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29923136/risk-assessment-of-high-concentrations-of-molybdenum-in-forage
#17
U Axelson, M Söderström, A Jonsson
Molybdenum is toxic to ruminants when present in high levels in forage, causing physiological copper deficiency. A critical level for ruminants is 3-10 mg Mo kg-1 dry matter. The average Mo level varies considerably between different arable soils, depending mainly on soil parent material. This study investigated the possibility of using various existing sources of geospatial information (geophysical, biogeochemical and soil chemical) to develop a geography-based risk assessment system. Forage samples (n = 173) were collected in 2006-2007...
June 19, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29909443/impact-of-a-severe-flood-on-large-scale-contamination-of-arable-soils-by-potentially-toxic-elements-serbia
#18
Svetlana Antić-Mladenović, Mirjana Kresović, Dragan Čakmak, Veljko Perović, Elmira Saljnikov, Vlado Ličina, Jörg Rinklebe
Extreme flooding in May, 2014 affected the sub-catchments of six major rivers in Serbia. The goal of the study was to evaluate the contents of potentially toxic elements (PTEs) As, Cd, Pb, Cr, Ni, Cu, and Zn in flood sediments and arable soils within the affected sub-catchments using regulatory guidelines and background levels. The sub-catchment of West Morava was selected to assess the degree of sediments and soils contamination and environmental risk [using the Pollution index (Pi ), Enrichment factor, Geo-accumulation index, and Potential ecological risk index (PERI)] as well as to identify main PTEs sources by Principal component (PCA) and cluster analysis...
June 16, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29909442/evaluation-of-multiple-water-quality-indices-for-drinking-and-irrigation-purposes-for-the-karoon-river-iran
#19
Milad Mirzaei Aminiyan, Jacqueline Aitkenhead-Peterson, Farzad Mirzaei Aminiyan
The main purpose of this study was to evaluate the water quality of the Karoon river, which is a main river in Iran country. For this purpose, hydrochemical analyses of a database that maintained by the Water Resources Authority of Khuzestan Province, Iran's Ministry of Energy, were carried out. These data were compared with the maximum permissible limit values recommended by World Health Organization and Food and Agriculture Organization water standards for drinking and agricultural purposes, respectively...
June 16, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29948539/magnetic-chitosan-sodium-alginate-gel-bead-as-a-novel-composite-adsorbent-for-cu-ii-removal-from-aqueous-solution
#20
Hu-Chun Tao, Shuo Li, Li-Juan Zhang, Yi-Zhen Chen, Li-Ping Deng
Using sodium alginate hydrogel as skeleton, in combination with chitosan and magnetic Fe3 O4 , a new type of magnetic chitosan/sodium alginate gel bead (MCSB) was prepared. Adsorptive removal of Cu(II) from aqueous solutions was studied by using the MCSB as a promising candidate in environmental application. Different kinetics and isotherm models were employed to investigate the adsorption process. Based on Fourier transform infrared spectroscopy, field-emission scanning electron microscope, CHNS/O elements analysis, vibration magnetometer, and various means of characterization, a comprehensive analysis of the adsorption mechanism was conducted...
June 14, 2018: Environmental Geochemistry and Health
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