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https://www.readbyqxmd.com/read/28346909/bioaugmentaton-in-technosols-created-in-abandoned-pyritic-tailings-can-contribute-to-enhance-soil-c-sequestration-and-plant-colonization
#1
Raúl Zornoza, Melisa Gómez-Garrido, Silvia Martínez-Martínez, María Dolores Gómez-López, Ángel Faz
Creation of Technosols in combination with phytostabilization may be a sustainable strategy to minimize the environmental and human health hazards derived from mine tailings. Bioaugmentation can facilitate plant establishment and growth for efficient phytostabilization. In order to assess if bioaugmentation can increase soil quality and fertility, decrease metal(loid) mobility and accelerate plant colonization, a one-year field experiment was designed with creation of Technosols in two tailings ponds with different pH (acidic (AT) and neutral (NT)), with addition of marble waste (MaW) and two organic materials (pig manure (PM) and sewage sludge (SS), without or with inoculation of effective microorganisms (EM) at three rates...
March 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28346347/biosynthesis-of-%C3%AE-glucosidase-inhibitors-by-a-newly-isolated-bacterium-paenibacillus-sp-tku042-and-its-effect-on-reducing-plasma-glucose-in-a-mouse-model
#2
Van Bon Nguyen, Anh Dzung Nguyen, Yao-Haur Kuo, San-Lang Wang
Paenibacillus sp. TKU042, a bacterium isolated from Taiwanese soil, produced α-glucosidase inhibitors (aGIs) in the culture supernatant when commercial nutrient broth (NB) was used as the medium for fermentation. The supernatant of fermented NB (FNB) showed stronger inhibitory activities than acarbose, a commercial anti-diabetic drug. The IC50 and maximum α-glucosidase inhibitory activities (aGIA) of FNB and acarbose against α-glucosidase were 81 μg/mL, 92% and 1395 μg/mL, 63%, respectively. FNB was found to be strongly thermostable, retaining 95% of its relative activity, even after heating at 100 °C for 30 min...
March 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28345874/delivery-of-pesticides-to-plant-parasitic-nematodes-using-tobacco-mild-green-mosaic-virus-as-a-nanocarrier
#3
Paul L Chariou, Nicole F Steinmetz
Plant parasitic nematodes are a major burden to the global agricultural industry, causing a $157 billion loss each year in crop production worldwide. Effective treatment requires large doses of nematicides to be applied, putting the environment and human health at risk. Challenges are to treat nematodes that are located deep within the soil, feeding on the roots of plants. To attack the problem at its roots, we propose the use of tobacco mild green mosaic virus (TMGMV), an EPA-approved herbicide as a carrier to deliver nematicides...
March 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28345666/members-of-gammaproteobacteria-as-indicator-species-of-healthy-banana-plants-on-fusarium-wilt-infested-fields-in-central-america
#4
Martina Köberl, Miguel Dita, Alfonso Martinuz, Charles Staver, Gabriele Berg
Culminating in the 1950's, bananas, the world's most extensive perennial monoculture, suffered one of the most devastating disease epidemics in history. In Latin America and the Caribbean, Fusarium wilt (FW) caused by the soil-borne fungus Fusarium oxysporum f. sp. cubense (FOC), forced the abandonment of the Gros Michel-based export banana industry. Comparative microbiome analyses performed between healthy and diseased Gros Michel plants on FW-infested farms in Nicaragua and Costa Rica revealed significant shifts in the gammaproteobacterial microbiome...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28343716/transformation-of-zinc-concentrate-in-surface-and-subsurface-environments-implications-for-assessing-zinc-mobility-toxicity-and%C3%A2-choosing-an-optimal-remediation-strategy
#5
Man Jae Kwon, Maxim I Boyanov, Jung-Seok Yang, Seunghak Lee, Yun Ho Hwang, Ju Yeon Lee, Bhoopesh Mishra, Kenneth M Kemner
Zinc contamination in near- and sub-surface environments is a serious threat to many ecosystems and to public health. Sufficient understanding of Zn speciation and transport mechanisms is therefore critical to evaluating its risk to the environment and to developing remediation strategies. The geochemical and mineralogical characteristics of contaminated soils in the vicinity of a Zn ore transportation route were thoroughly investigated using a variety of analytical techniques (sequential extraction, XRF, XRD, SEM, and XAFS)...
March 24, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28343040/the-influence-of-lead-content-in-drinking-water-household-dust-soil-and-paint-on-blood-lead-levels-of-children-in-flin-flon-manitoba-and-creighton-saskatchewan
#6
Adam M Safruk, Erin McGregor, Melissa L Whitfield Aslund, Paul H Cheung, Celine Pinsent, Blair J Jackson, Alan T Hair, Murray Lee, Elliot A Sigal
Lead exposure continues to be an important health issue despite the general removal of lead sources in commercial and industrial applications. Low levels of lead exposure have been found to produce adverse neurodevelopmental effects in children with no evidence that a threshold exists for this critical endpoint. Blood lead levels (BLLs) were measured in children (n=118) under the age of 7years in the northern Canadian smelter community of Flin Flon, Manitoba and Creighton, Saskatchewan. An environmental sampling component was included to examine the relationship between lead content in outdoor soil, household dust, tap water, and paint within a given household and the corresponding BLLs in participating children...
March 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28342960/geophagy-during-pregnancy-is-there-a-health-risk-for-infants
#7
Claudia Gundacker, Ruth Kutalek, Rosina Glaunach, Coloman Deweis, Markus Hengstschläger, Armin Prinz
Prenatal lead exposure is a public health concern. Geophagy, the practice of soil eating, is documented for pregnant women of sub-Saharan Africa to treat pregnancy-related malaise. The soils however can contain substantial amounts of lead. In an exploratory study on 48 mother-child pairs in the Democratic Republic of Congo, we found striking site-specific differences in prenatal lead exposure, i.e., higher lead levels at Kisangani than at Isiro. Kisangani women consumed 1/ more often soil during the first trimester of pregnancy as well as 2/ a different type of soil compared to Isiro women (P<0...
March 23, 2017: Environmental Research
https://www.readbyqxmd.com/read/28342888/effect-of-exogenous-tgf-%C3%AE-1-on-the-cadmium-induced-nephrotoxicity-by-inhibiting-apoptosis-of-proximal-tubular-cells-through-pi3k-akt-mtor-signaling-pathway
#8
Minyi Huang, Li Su, Limin Yang, Liangliang Zhu, Zhaowen Liu, Renyan Duan
Heavy metal polluted soils have been a serious problem for the global ecological balance and people's health. Cadmium (Cd), one of the heavy metals, could induce apoptosis of proximal tubular cells in many experimental models and lead to damage the human kidney. Here, we reported a potent chemokine TGF-β1 which could ameliorate cadmium-induced nephrotoxicity. Interestingly, western blotting and TUNEL staining assays indicated that PI3K-AKT-mTOR signaling pathway was involved in the protective mechanism of TGF-β1 in vitro and in vivo...
March 22, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28342453/ionizing-radiation-biomarkers-in-epidemiological-studies-an-update
#9
REVIEW
Janet Hall, Penny A Jeggo, Catharine West, Maria Gomolka, Roel Quintens, Christophe Badie, Olivier Laurent, An Aerts, Nataša Anastasov, Omid Azimzadeh, Tamara Azizova, Sarah Baatout, Bjorn Baselet, Mohammed A Benotmane, Eric Blanchardon, Yann Guéguen, Siamak Haghdoost, Mats Harms-Ringhdahl, Julia Hess, Michaela Kreuzer, Dominique Laurier, Ellina Macaeva, Grainne Manning, Eileen Pernot, Jean-Luc Ravanat, Laure Sabatier, Karine Tack, Soile Tapio, Horst Zitzelsberger, Elisabeth Cardis
Recent epidemiology studies highlighted the detrimental health effects of exposure to low dose and low dose rate ionizing radiation (IR): nuclear industry workers studies have shown increased leukaemia and solid tumour risks following cumulative doses of <100mSv and dose rates of <10mGy per year; paediatric patients studies have reported increased leukaemia and brain tumours risks after doses of 30-60mGy from computed tomography scans. Questions arise, however, about the impact of even lower doses and dose rates where classical epidemiological studies have limited power but where subsets within the large cohorts are expected to have an increased risk...
January 2017: Mutation Research
https://www.readbyqxmd.com/read/28342080/heavy-metals-bioconcentration-from-soil-to-vegetables-and-appraisal-of-health-risk-in-koka-and-wonji-farms-ethiopia
#10
Temesgen Eliku, Seyoum Leta
Heavy metal accumulation in agricultural crops has grown a major concern globally as a result of a significant health impact on human. The quantification of heavy metals (Cd, Pb, Cr, Zn, Cu, and Ni) in the soil and vegetables at two sites (Koka and Wonji Gefersa) was done using flame atomic absorption spectrophotometer. The mean concentrations of heavy metals in vegetable fields' soil samples obtained from Koka were higher for Pb, Cr, Zn, Cu, and Ni. The overall results of soil samples ranged 0.52-0.93, 13...
March 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28342052/arsenic-concentrations-in-local-aromatic-and-high-yielding-hybrid-rice-cultivars-and-the-potential-health-risk-a-study-in-an-arsenic-hotspot
#11
Arifin Sandhi, Maria Greger, Tommy Landberg, Gunnar Jacks, Prosun Bhattacharya
The presence of high levels of arsenic (As) in rice fields has negative effects on the health of those consuming rice as their subsistence food. This study determined the variation in total As concentration in local aromatic rice (LAR) (kalijira) and two high-yielding varieties (HYVs) (BRRI dhan 32 and BRRI dhan 28) grown in paddy fields in Matlab, Bangladesh, an As hotspot with elevated As levels in groundwater. Mature rice grain samples and soil samples were collected from different paddy fields, and the As concentrations in both the de-husked grains and the husks of the three rice cultivars were analysed to identify the safest of the three cultivars for human consumption...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28340462/assessment-of-arsenic-and-fluorine-in-surface-soil-to-determine-environmental-and-health-risk-factors-in-the-comarca-lagunera-mexico
#12
Yareli A Sariñana-Ruiz, Jorge Vazquez-Arenas, Fabiola S Sosa-Rodríguez, Israel Labastida, Ma Aurora Armienta, Antonio Aragón-Piña, Miguel A Escobedo-Bretado, Laura S González-Valdez, Patricia Ponce-Peña, Hugo Ramírez-Aldaba, René H Lara
Total, bioaccessible and mobile concentrations of arsenic and fluorine are determined in polluted surface soil within the Comarca Lagunera region using standardized protocols to obtain a full description of the environmental behavior for these elements. The composition of mineral phases associated with them is evaluated with microscopic and spectroscopic techniques. Mineralogical characterizations indicate that ultra-fine particles (<1-5 μm) including mimetite-vanadite (Pb5(AsO4)3Cl, Pb5(AsO4, VO4)3Cl)-like, lead arseniate (Pb3(AsO4)2)-like and complex arsenic-bearing compounds are main arsenic-bearing phases, while fluorite (CaF2) is the only fluorine-bearing phase...
March 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28337621/metal-contaminated-potato-crops-and-potential-human-health-risk-in-bolivian-mining-highlands
#13
Alan E Garrido, William H J Strosnider, Robin Taylor Wilson, Janette Condori, Robert W Nairn
This study assessed metals in irrigation water, soil and potato crops impacted by mining discharges, as well as potential human health risk in the high desert near the historic mining center of Potosí, Bolivia. Metal concentrations were compared with international concentration limit guidelines. In addition, an ingested average daily dose and minimum risk level were used to determine the hazard quotient from potato consumption for adults and children. Irrigation water maximum concentrations of Cd, Pb and Zn in mining-impacted sites were elevated 20- to 1100-fold above international concentration limit guidelines...
March 23, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28336973/microbial-community-composition-is-related-to-soil-biological-and-chemical-properties-and-bacterial-wilt-outbreak
#14
Rui Wang, Hongchun Zhang, Liguang Sun, Gaofu Qi, Shu Chen, Xiuyun Zhao
Soil microbes play important roles in plant growth and health. Little is known about the differences of soil microbes between healthy and bacterial wilt infected soils with Ralstonia solanacearum. By Illumina-MiSeq sequencing of 16S rRNA and 18S rRNA gene amplicons, we found the soil microbial composition and diversity were distinct between healthy and bacterial wilt infected soils. Soil microbial community varied at different plant growth stages due to changes of root exudates composition and soil pH. Healthy soils exhibited higher microbial diversity than the bacterial wilt infected soils...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336966/an-integrated-h-g-scheme-identifying-areas-for-soil-remediation-and-primary-heavy-metal-contributors-a-risk-perspective
#15
Bin Zou, Xiaolu Jiang, Xiaoli Duan, Xiuge Zhao, Jing Zhang, Jingwen Tang, Guoqing Sun
Traditional sampling for soil pollution evaluation is cost intensive and has limited representativeness. Therefore, developing methods that can accurately and rapidly identify at-risk areas and the contributing pollutants is imperative for soil remediation. In this study, we propose an innovative integrated H-G scheme combining human health risk assessment and geographical detector methods that was based on geographical information system technology and validated its feasibility in a renewable resource industrial park in mainland China...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28335450/assessment-of-radioactive-materials-and-heavy-metals-in-the-surface-soil-around-the-bayanwula-prospective-uranium-mining-area-in-china
#16
Haribala Bai, Bitao Hu, Chengguo Wang, Shanhu Bao, Gerilemandahu Sai, Xiao Xu, Shuai Zhang, Yuhong Li
The present work is the first systematic and large scale study on radioactive materials and heavy metals in surface soil around the Bayanwula prospective uranium mining area in China. In this work, both natural and anthropogenic radionuclides and heavy metals in 48 surface soil samples were analyzed using High Purity Germanium (HPGe) γ spectrometry and inductively coupled plasma-mass spectrometry (ICP-MS). The obtained mean activity concentrations of (238)U, (226)Ra, (232)Th, (40)K, and (137)Cs were 25.81 ± 9...
March 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28335439/mercury-levels-in-human-hair-and-farmed-fish-near-artisanal-and-small-scale-gold-mining-communities-in-the-madre-de-dios-river-basin-peru
#17
Aubrey L Langeland, Rebecca D Hardin, Richard L Neitzel
Artisanal and small-scale gold mining (ASGM) has been an important source of income for communities in the Madre de Dios River Basin in Peru for hundreds of years. However, in recent decades, the scale of ASGM activities in the region has increased dramatically, and exposures to a variety of occupational and environmental hazards related to ASGM, including mercury, are becoming more widespread. The aims of our study were to: (1) examine patterns in the total hair mercury level of human participants in several communities in the region and compare these results to the 2...
March 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28334674/organochlorine-pesticides-in-soil-air-and-vegetation-at-and-around-a-contaminated-site-in-southwestern-china-concentration-transmission-and-risk-evaluation
#18
Yanyan Fang, Zhiqiang Nie, Qingqi Die, Yajun Tian, Feng Liu, Jie He, Qifei Huang
Remediation and management of contaminated sites have become a prevalent problem under the current situation in China. The present study was conducted to investigate the concentration, transmission, and health risk of organochlorine pesticides (OCPs) in soil, air, and vegetation at and around a typical pesticide-contaminated site located in southwestern China. Exchange flux between soil and air was calculated to investigate the transmission of OCPs. Hexachlorocyclohexane (ΣHCHs, top soil: 19.1 mg/kg d.w., air: 52...
March 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28334670/spatial-distribution-emission-source-and-health-risk-of-parent-pahs-and-derivatives-in-surface-soils-from-the-yangtze-river-delta-eastern-china
#19
ChuanYang Cai, JingYa Li, Di Wu, XiLong Wang, Daniel C W Tsang, XiangDong Li, JianTeng Sun, LiZhong Zhu, HuiZhong Shen, Shu Tao, WenXin Liu
243 surface soil samples were collected from the Yangtze River Delta (YRD) region, and the concentration distributions and compositional profiles of 27 parent PAHs (PPAHs), nitro- and oxy-derivatives (NPAHs and OPAHs), respectively, and health risk of 16 PPAHs were determined. Atmospheric samples were collected at two sites with high topsoil concentrations of PAHs to assist in identifying the emission sources of PPAHs. The total concentrations of PPAHs, NPAHs and OPAHs fell in the ranges of 21.0-3563.2 ng/g, 0...
March 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28334619/investigation-on-metal-tolerance-and-phytoremoval-activity-in-the-poplar-hybrid-clone-monviso-under-cu-spiked-water-potential-use-for-wastewater-treatment
#20
Fabrizio Pietrini, Daniela Di Baccio, Valentina Iori, Sofia Veliksar, Natalia Lemanova, Liudvika Juškaitė, Audrius Maruška, Massimo Zacchini
A serious concern for the environmental and human health is represented by the increasing copper (Cu) occurrence in agricultural soils and waters, because of the possible food contamination and bioaugmentation along the trophic chain. The request for the decontamination of different matrices with an environmentally sustainable technology as the phytoremediation should be addressed by selecting plant materials with improved pollutant tolerance and removal capability. With this purpose, plants of the hybrid poplar clone "Monviso" (Populus×generosa A...
March 20, 2017: Science of the Total Environment
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