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Environmental Geochemistry and Health

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https://www.readbyqxmd.com/read/28623427/blood-concentrations-of-lead-cadmium-mercury-and-their-association-with-biomarkers-of-dna-oxidative-damage-in-preschool-children-living-in-an-e-waste-recycling-area
#1
Xijin Xu, Weitang Liao, Yucong Lin, Yifeng Dai, Zhihua Shi, Xia Huo
Reactive oxygen species (ROS)-induced DNA damage occurs in heavy metal exposure, but the simultaneous effect on DNA repair is unknown. We investigated the influence of co-exposure of lead (Pb), cadmium (Cd), and mercury (Hg) on 8-hydroxydeoxyguanosine (8-OHdG) and human repair enzyme 8-oxoguanine DNA glycosylase (hOGG1) mRNA levels in exposed children to evaluate the imbalance of DNA damage and repair. Children within the age range of 3-6 years from a primitive electronic waste (e-waste) recycling town were chosen as participants to represent a heavy metal-exposed population...
June 16, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28620817/effect-of-biosolid-hydrochar-on-toxicity-to-earthworms-and-brine-shrimp
#2
Tatiane Medeiros Melo, Michael Bottlinger, Elke Schulz, Wilson Mozena Leandro, Adelmo Menezes de Aguiar Filho, Yong Sik Ok, Jörg Rinklebe
The hydrothermal carbonization of sewage sludge has been studied as an alternative technique for the conversion of sewage sludge into value-added products, such as soil amendments. We tested the toxicity of biosolid hydrochar (Sewchar) to earthworms. Additionally, the toxicity of Sewchar process water filtrate with and without pH adjustment was assessed, using brine shrimps as a model organism. For a Sewchar application of 40 Mg ha(-1), the earthworms significantly preferred the side of the vessel with the reference soil (control) over side of the vessel with the Sewchar treatments...
June 15, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28620816/bioaccessibility-of-as-cu-pb-and-zn-in-mine-waste-urban-soil-and-road-dust-in-the-historical-mining-village-of-ka%C3%A5-k-czech-republic
#3
Petr Drahota, Karel Raus, Eva Rychlíková, Jan Rohovec
Historical mining activities in the village of Kaňk (in the northern part of the Kutná Hora ore district, Czech Republic) produced large amounts of mine wastes which contain significant amounts of metal(loid) contaminants such as As, Cu, Pb, and Zn. Given the proximity of residential communities to these mining residues, we investigated samples of mine waste (n = 5), urban soil (n = 6), and road dust (n = 5) with a special focus on the solid speciation of As, Cu, Pb, and Zn using a combination of methods (XRD, SEM/EDS, oxalate extractions), as well as on in vitro bioaccessibility in simulated gastric and lung fluids to assess the potential exposure risks for humans...
June 15, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28612322/integrative-assessment-of-sediment-quality-in-lower-basin-affected-by-former-mining-in-brazil
#4
Estefanía Bonnail, Lucas M Buruaem, Lucas G Morais, Giuliana S Araujo, Denis M S Abessa, Aguasanta M Sarmiento, T Ángel DelValls
The Ribeira de Iguape River (Southeast Brazil) is metal contaminated by mining activities. Despite it has been cataloged as "in via of restoration" by the literature, this basin is still a sink of pollution in some segments of the fluvial system. This study aimed to assess the sediment quality in the lower part of the RIR basin. The employed approach was based on biological responses of the freshwater clam Corbicula fluminea after 7-day exposure bioassays using as the reference site the Perequê Ecological Park...
June 13, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28600727/evaluation-of-acidity-in-late-permian-outcrop-coals-and-its-association-with-endemic-fluorosis-in-the-border-area-of-yunnan-guizhou-and-sichuan-in-china
#5
Xiuping Hong, Handong Liang, Yufa Zhang
The junction area of Yunnan, Guizhou, and Sichuan provinces is the heaviest coal-burning endemic fluorosis zones in China. To better understand the pathogenicity of endemic fluorosis in this area, 87 coal samples from the late Permian outcrop or semi-outcrop coal seams were collected in eight counties of the junction area of Yunnan, Guizhou, and Sichuan provinces. The total fluorine and sulfate content, etc. in the coal was determined using combustion-hydrolysis/fluoride-ion-selective electrode method and ion chromatography, respectively...
June 9, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28600726/the-influence-of-physicochemical-parameters-on-bioaccessibility-adjusted-hazard-quotients-for-copper-lead-and-zinc-in-different-grain-size-fractions-of-urban-street-dusts-and-soils
#6
Sharareh Dehghani, Farid Moore, Luba Vasiluk, Beverley A Hale
When the hazard quotient for ingestion (HQI) of a trace element in soil and dust particles is adjusted for the element's bioaccessibility, the HQI is typically reduced as compared to its calculation using pseudo-total element concentration. However, those studies have mostly used bulk particles (<2 mm or <250 µm), and the reduction in HQI when expressed as bioaccessible metal may not be similar among particle size fractions, the possibility probed by the present study of street dusts and soils collected in Tehran...
June 9, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28584978/review-of-total-suspended-particles-tsp-and-pm2-5-concentration-variations-in-asia-during-the-years-of-1998-2015
#7
Guor-Cheng Fang, Yuan-Jie Zhuang, Meng-Hsien Cho, Chao-Yang Huang, You-Fu Xiao, Kai-Hsiang Tsai
In Asian countries such as China, Malaysia, Pakistan, India, Taiwan, Korea, Japan and Hong Kong, ambient air total suspended particulates and PM2.5 concentration data were collected and discussed during the years of 1998-2015 in this study. The aim of the present study was to (1) investigate and collect ambient air total suspended particulates (TSP) and PM2.5 concentrations for Asian countries during the past two decades. (2) Discuss, analyze and compare those particulates (TSP and PM2.5) annual concentration distribution trends among those Asian countries during the past two decades...
June 5, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28578479/vulnerability-associated-with-symptoms-similar-to-those-of-mercury-poisoning-in-communities-from-xingu-river-amazon-basin
#8
Flávio Mnaoel Rodrigues Da Silva-Junior, Ritta M Oleinski, Antonia E S Azevedo, Kátia C M C Monroe, Marina Dos Santos, Tatiane Britto Da Silveira, Adrianne Maria Netto De Oliveira, Maria Cristina Flores Soares, Tatiana Da Silva Pereira
The Brazilian Amazon is known to be a region with high levels of mercury (Hg) in the environment and studies point to an association between high levels of natural mercury in the mother rock and the vast number of clandestine gold mines. Other studies already report the contamination of fish in this region, as well as high levels of Hg in biological material from environmentally exposed populations. On the other hand, this is one of the least developed regions of the planet and it is necessary to understand the vulnerability factors in these populations that may be intoxicated by this element...
June 3, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28577063/indoor-and-outdoor-radon-measurements-at-lung-cancer-patients-homes-in-the-dwellings-of-rize-province-in-turkey
#9
Songül Akbulut Özen, Necati Celik, Emrehan Dursun, Halim Taskın
In this study, indoor and outdoor radon ((222)Rn) surveys were carried out in the summer and winter seasons in homes of one hundred lung cancer patients in the year 2013-2014. The aim was to investigate the relationship between radon and cancer patients. Lung cancer patients completed a questionnaire concerning their living environment, various physical parameters and living habits. Pearson correlation and t tests revealed no meaningful results between radon concentrations, on one hand, and environmental and personal living habits, on the other hand...
June 2, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28573332/a-new-comprehensive-ecological-risk-index-for-risk-assessment-on-luanhe-river-china
#10
Kun Bao, Jing-Ling Liu, Xiao-Guang You, Xuan Shi, Bo Meng
With the enhancement of human activities which influence the physical and chemical integrity of ecosystem, it was bound to increase ecological risk to the ecosystem, and the risk assessment of small scale, single pollutant, or only on water quality have been not satisfied the demand of sustainable development of basin water environment. Based on the response relationship between environmental flow requirements guarantee ratio (GEF) and river ecological risk index (ERI), the Sediment Quality Guideline Quotient index (SQG-Q), and the Biotic Index (BI), we construct a new comprehensive ecological risk index (CERI) to evaluate the ecological risk of Luanhe River, China...
June 1, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28555279/mercury-uptake-by-halophytes-in-response-to-a-long-term-contamination-in-coastal-wetland-salt-marshes-northern-adriatic-sea
#11
E Pellegrini, E Petranich, A Acquavita, J Canário, A Emili, S Covelli
Mercury (Hg) distribution in saltmarsh sediments and in three selected halophytes (Limonium narbonense, Sarcocornia fruticosa and Atriplex portulacoides) of a wetland system (Marano and Grado Lagoon, Italy) following a contamination gradient in sediments was investigated. The Hg uptake was evaluated at the root system level by calculating the enrichment factor (EF) and in the aboveground tissues by means of the translocation factor (TF). The related methylmercury (MeHg) concentrations in the halophytes were also investigated with regard to the location of the sites and their degree of contamination...
May 29, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28551883/chemical-fractionation-and-mobility-of-traffic-related-elements-in-road-environments
#12
Ewa Adamiec
Due to considerable progress in exhaust control emission technology and extensive regulatory work regarding this issue, non-exhaust sources of air pollution have become a growing concern. This research involved studying three types of road environment samples such as road dust, sludge from storm drains and roadside soil collected from heavily congested and polluted cities in Poland (Krakow, Warszawa, Opole and Wroclaw). Particles below 20 µm were examined since it was previously estimated that this fine fraction of road dust is polluted mostly by metals derived from non-exhaust sources of pollution such as brake linings wear...
May 27, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28551882/medical-geology-of-endemic-goiter-in-kalutara-sri-lanka-distribution-and-possible-causes
#13
G W A R Fernando, P L C L Liyanage, Anushka Upamali Rajapaksha, Meththika Vithanage
This study assesses the distribution of goiter in the Kalutara District, Sri Lanka in order to find causative factors for the occurrence of goiter even after the salt iodization. A questionnaire survey was conducted at the household level and at the same time iodine and selenium levels of the water sources were analyzed. Questionnaire survey results indicated the highest numbers of goiter patients in the northern part where the lowest were found in the southern sector which may be due to the presence of acid sulfate soils...
May 27, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28551881/abundance-and-distribution-of-antibiotic-resistance-genes-in-a-full-scale-anaerobic-aerobic-system-alternately-treating-ribostamycin-spiramycin-and-paromomycin-production-wastewater
#14
Mei Tang, Xiaomin Dou, Chunyan Wang, Zhe Tian, Min Yang, Yu Zhang
The occurrence of antibiotic-resistant bacteria and antibiotic resistance genes (ARGs) has been intensively investigated for wastewater treatment systems treating single class of antibiotic in recent years. However, the impacts of alternately occurring antibiotics in antibiotic production wastewater on the behavior of ARGs in biological treatment systems were not well understood yet. Herein, techniques including high-capacity quantitative PCR and quantitative PCR (qPCR) were used to investigate the behavior of ARGs in an anaerobic-aerobic full-scale system...
May 27, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28550602/optimizing-the-modification-of-wood-waste-biochar-via-metal-oxides-to-remove-and-recover-phosphate-from-human-urine
#15
Kangning Xu, Chuke Zhang, Xiaomin Dou, Weifang Ma, Chengwen Wang
The recovery of phosphate from human urine has been considered as one of the most attractive benefits of urine source separation because P is an essential but limited macronutrient. This study investigated the approach to modify wood waste biochar via metal oxides aiming to recover phosphate from human urine to produce a value-added biochar. Results showed the phosphate removal ability was enhanced for the modified biochar pre-treated in modification solutions of MgCl2, AlCl3, CaCl2 and FeCl3, respectively, while natural biochar released phosphate to urine...
May 26, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28550601/potential-toxicity-of-trace-elements-and-nanomaterials-to-chinese-cabbage-in-arsenic-and-lead-contaminated-soil-amended-with-biochars
#16
Yasser Mahmoud Awad, Meththika Vithanage, Nabeel Khan Niazi, Muhammad Rizwan, Jörg Rinklebe, Jae E Yang, Yong Sik Ok, Sang Soo Lee
To our knowledge, this is the first report on exploring the interactive effects of various biochars (BCs) and nanomaterials (NMs) on plant growth and bioavailability of trace elements in soil. This study evaluated the bioavailability and toxicity of arsenic (As), lead (Pb), and NMs to cabbage plants. The BCs were produced from rice husk (RB), sewage sludge, and bamboo wood (WB). The BCs at 2.5 and 5% (w w(-1)), NMs for removing As (NMs-As) and heavy metals (NMs-HM) at 3000 mg kg(-1), and multi-walled carbon nanotubes (CNT) at 1000 mg kg(-1) were applied in bioassay and incubation experiments (40 days), along with the unamended soil as the control...
May 26, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28550600/adsorption-antagonism-and-synergy-of-arsenate-v-and-cadmium-ii-onto-fe-modified-rice-straw-biochars
#17
Youchi Zhang, Jiajun Fan, Minglai Fu, Yong Sik Ok, Yanwei Hou, Chao Cai
Arsenic-containing water poses a serious threat to human health. In this study, two types of Fe-modified rice straw biochars [(Fe-impregnated biochar (FeIm char) and pre-modified rice straw biochar (PMRS char)] were prepared, in which three ratios [1, 5, and 10% (w/w)] of Fe modification were evaluated, resulting in six different Fe-modified biochars. Then, a series of adsorption experiments, using single- and binary-metal solutions of As(V) and Cd(II), were conducted to investigate the performances of modified biochars on metal adsorption compared to pristine rice straw biochar (RS char)...
May 26, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28550599/rare-earth-elements-in-street-dust-and-associated-health-risk-in-a-municipal-industrial-base-of-central-china
#18
Guangyi Sun, Zhonggen Li, Ting Liu, Ji Chen, Tingting Wu, Xinbin Feng
The content levels, distribution characteristics, and health risks associated with 15 rare earth elements (REEs) in urban street dust from an industrial city, Zhuzhou, in central China were investigated. The total REE content (∑REE) ranged from 66.1 to 237.4 mg kg(-1), with an average of 115.9 mg kg(-1), which is lower than that of Chinese background soil and Yangtze river sediment. Average content of the individual REE in street dust decreased in the order Ce > La > Nd > Y > Pr > Sm > Gd > Dy > Er > Yb > Eu > Ho > Tb > Tm > Lu...
May 26, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28540510/modelling-the-potential-mobility-of-cd-cu-ni-pb-and-zn-in-mollic-fluvisols
#19
Thilo Rennert, Jörg Rinklebe
European floodplain soils are frequently contaminated with potentially toxic inorganic substances. We used a multi-surface model to estimate the aqueous concentrations of Cd, Cu, Ni, Pb and Zn in three Mollic Fluvisols from the Central Elbe River (Germany). The model considered complexation in solution and interactions with soil organic matter (SOM), a clay mineral and hydrous Al, Fe and Mn oxides. The amounts of reactive metals were derived from extraction with 0.43 M HNO3. Modelling was carried out as a function of pH (soil pH ± 1...
May 24, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28536963/hair-geochemical-composition-of-children-from-vilnius-kindergartens-as-an-indicator-of-environmental-conditions
#20
Ričardas Taraškevičius, Rimantė Zinkutė, Laura Gedminienė, Žilvinas Stankevičius
The research is based on analysis data of Cr, Cu, Mn, Ni, V, Zn (metals) and S in the hair of 47 girls and 63 boys from eight Vilnius kindergartens and the distribution pattern of high metal concentrations and bioavailability in snow-cover dust, also dust samples from vents of characteristic pollution sources. The kindergartens were selected according to topsoil total contamination index and dust-related indices. Significantly higher Cu, Mn, Ni and Zn concentrations in the hair of girls (means are 1.1, 1.9, 1...
May 23, 2017: Environmental Geochemistry and Health
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