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https://www.readbyqxmd.com/read/28922748/cesium-uptake-by-rice-roots-largely-depends-upon-a-single-gene-hak1-which-encodes-a-potassium-transporter
#1
Hiroki Rai, Saki Yokoyama, Namiko Satoh-Nagasawa, Jun Furukawa, Takiko Nomi, Yasuka Ito, Shigeto Fujimura, Hidekazu Takahashi, Ryuichiro Suzuki, ELMannai Yousra, Akitoshi Goto, Shinichi Fuji, Shin-Ichi Nakamura, Takuro Shinano, Nobuhiro Nagasawa, Hiroetsu Wabiko, Hiroyuki Hattori
Incidents at the Fukushima and Chernobyl nuclear power stations have resulted in widespread environmental contamination by radioactive nuclides. Among them, 137cesium has a 30 year half-life, and its persistence in soil raises serious food security issues. It is therefore important to prevent plants, especially crop plants, from absorbing radiocesium. In Arabidopsis thaliana, cesium ions are transported into root cells by several different potassium transporters such as high-affinity K+ transporter 5 (AtHAK5)...
September 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28920758/occurrence-and-source-apportionment-of-polycyclic-aromatic-hydrocarbons-in-soils-and-sediment-from-hanfeng-lake-three-gorges-china
#2
Jing Cai, Shutao Gao, Like Zhu, Xuwei Jia, Xiangying Zeng, Zhiqiang Yu
This study was conducted to investigate the pollutant status and the retention mechanism of polycyclic aromatic hydrocarbons (PAHs) in soils and sediment from bank-water-level-fluctuating zone (WLFZ)-water systems in Hanfeng Lake, Three Gorges, China. The concentrations of the 16 PAHs ranged from 21.8 to 1324 ng g(-1) dry wt for all 20 soil and sediment samples. These concentration levels were remarkably lower than those in soils and sediment collected domestically and worldwide. PAHs with two and three rings were found to be dominant in all the samples, with phenanthrene being most abundant...
September 18, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28920403/comparison-of-bacterial-communities-in-leachate-from-decomposing-bovine-carcasses
#3
Seung-Hak Yang, Hee Kwon Ahn, Bong Soo Kim, Sun Sik Chang, Ki Yong Chung, Eun Mi Lee, Kwang Seok Ki, Eung Gi Kwon
Objective: Burial is associated with environmental effects such as the contamination of ground or surface water with biological materials generated during the decomposition process. Therefore, bacterial communities in leachates originating from the decomposing bovine carcasses were investigated. Methods: To understand the process of bovine (Hanwoo) carcass decomposition, we simulated burial using a lab-scale reactor with a volume of 5.15 m3. Leachate samples from 3 carcasses were collected using a peristaltic pump once a month for a period of 5 months, and bacterial communities in samples were identified by pyrosequencing of the 16S rRNA gene...
September 18, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28919889/dehalococcoides-as-a-potential-biomarker-evidence-for-uncharacterized-organohalides-in-environmental-samples
#4
Qihong Lu, Ling Yu, Zhiwei Liang, Qingyun Yan, Zhili He, Tiangang Luan, Dawei Liang, Shanquan Wang
The massive production and improper disposal of organohalides resulted in worldwide contamination in soil and water. However, their environmental survey based on chromatographic methods was hindered by challenges in testing the extremely wide variety of organohalides. Dehalococcoides as obligate organohalide-respiring bacteria exclusively use organohalides as electron acceptors to support their growth, of which the presence could be coupled with organohalides and, therefore, could be employed as a biomarker of the organohalide pollution...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28918574/fecal-sludge-management-in-developing-urban-centers-a-review-on-the-collection-treatment-and-composting
#5
Emmanuel Alepu Odey, Zifu Li, Xiaoqin Zhou, Loissi Kalakodio
The problems posed by fecal sludge (FS) are multidimensional because most cities rapidly urbanize, which results in the increase in population, urban settlement, and waste generation. Issues concerning health and waste treatment have continued to create alarming situations. These issues had indeed interfered with the proper steps in managing FS, which contaminates the environment. FS can be used in agriculture as fertilizer because it is an excellent source of nutrients. The recent decline in crop production due to loss of soil organic component, erosion, and nutrient runoff has generated interest in the recycling of FS into soil nutrients through stabilization and composting...
September 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28918290/in-situ-arsenic-oxidation-and-sorption-by-a-fe-mn-binary-oxide-waste-in-soil
#6
Clare M McCann, Caroline L Peacock, Karen A Hudson-Edwards, Thomas Shrimpton, Neil D Gray, Karen L Johnson
The ability of a Fe-Mn binary oxide waste to adsorb arsenic (As) in a historically contaminated soil was investigated. Initial laboratory sorption experiments indicated that arsenite [As(III)] was oxidized to arsenate [As(V)] by the Mn oxide component, with concurrent As(V) sorption to the Fe oxide. The binary oxide waste had As(III) and As(V) adsorption capacities of 70mgg(-1) and 32mgg(-1) respectively. X-ray Absorption Near-Edge Structure and Extended X-ray Absorption Fine Structure at the As K-edge confirmed that all binary oxide waste surface complexes were As(V) sorbed by mononuclear bidentate corner-sharing, with 2 Fe at ∼3...
September 14, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28918276/phytoremediation-of-soil-co-contaminated-with-cd-and-bde-209-using-hyperaccumulator-enhanced-by-am-fungi-and-surfactant
#7
Hui Li, Xing Li, Lei Xiang, Hai Ming Zhao, Yan Wen Li, Quan Ying Cai, Li Zhu, Ce Hui Mo, Ming Hung Wong
Pot experiments were conducted to investigate the uptake and translocation of both Cd and decabromodiphenyl ether (BDE-209) in Solanum nigrum, under the treatments of two arbuscular mycorrhizal fungi [AMF, Funneliformis mosseae (FM) and Rhizophagus intraradices (RI)] and surfactant β-cyclodextrin (β-CD). Results showed that S. nigrum treated with either FM or β-CD significantly elevated shoot biomass and Cd concentrations and contents in shoots. The concentrations of BDE-209 in shoots and the dissipation and debromination efficiencies of BDE-209 in soil were significantly enhanced in S...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28918084/uranium-isotopes-in-tree-bark-as-a-spatial-tracer-of-environmental-contamination-near-former-uranium-processing-facilities-in-southwest-ohio
#8
Elise Conte, Elisabeth Widom, David Kuentz
Inappropriate handling of radioactive waste at nuclear facilities can introduce non-natural uranium (U) into the environment via the air or groundwater, leading to anthropogenic increases in U concentrations. Uranium isotopic analyses of natural materials (e.g. soil, plants or water) provide a means to distinguish between natural and anthropogenic U in areas near sources of radionuclides to the environment. This study examines the utility of two different tree bark transects for resolving the areal extent of U atmospheric contamination using several locations in southwest Ohio that historically processed U...
September 14, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28917315/protective-and-risk-factors-associated-with-the-presence-of-toxocara-spp-eggs-in-dog-hair
#9
Yslla Fernanda Fitz Balo Merigueti, Vamilton Alvares Santarém, Lívia Magosso Ramires, Aline da Silveira Batista, Layron Vinícus da Costa Beserra, Amábyle Lopes Nuci, Talita Mirella de Paula Esposte
Toxocariasis is one of the most prevalent parasitic zoonoses in the world. The disease is principally caused by the nematode Toxocara canis, whose definitive host is the dog. The transmission of toxocariasis to humans is mainly caused by accidental ingestion of embryonated eggs of the parasite, present in the soil. Studies have shown that dog hair has the capacity to harbor eggs of the parasite and represents a risk for transmission of the zoonosis. The objective of the present study was to evaluate the frequency and factors associated with the contamination of dog hair by Toxocara spp...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28917174/potential-effects-of-changes-in-climate-and-emissions-on-distribution-and-fate-of-perfluorooctane-sulfonate-in-the-bohai-rim-china
#10
Chao Su, Shuai Song, Yonglong Lu, Shijie Liu, John P Giesy, Deliang Chen, Alan Jenkins, Andrew J Sweetman, Baninla Yvette
Climate change and emissions rates of contaminants are expected to affect distribution and fate of Persistent Organic Pollutants (POPs) in the environment, however, studies on these combined factors are rare. In this study, Perfluorooctane Sulfonate (PFOS) is used as an example to assess how those two factors synthetically affect fate and disposition of POPs in the Bohai Rim of China by using the Berkeley-Trent-Urban-Rural (BETR-Urban-Rural) model. We set up three climate change scenarios and four emission scenarios to conduct the simulations...
September 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28915454/assessing-the-potential-contributions-of-additional-retention-processes-to-pfas-retardation-in-the-subsurface
#11
Mark L Brusseau
A comprehensive understanding of the transport and fate of per- and poly-fluoroalkyl substances (PFAS) in the subsurface is critical for accurate risk assessments and design of effective remedial actions. A multi-process retention model is proposed to account for potential additional sources of retardation for PFAS transport in source zones. These include partitioning to the soil atmosphere, adsorption at air-water interfaces, partitioning to trapped organic liquids (NAPL), and adsorption at NAPL-water interfaces...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28915412/aspergillus-section-flavi-community-structure-in-zambia-influences-aflatoxin-contamination-of-maize-and-groundnut
#12
Paul W Kachapulula, Juliet Akello, Ranajit Bandyopadhyay, Peter J Cotty
Aflatoxins are cancer-causing, immuno-suppressive mycotoxins that frequently contaminate important staples in Zambia including maize and groundnut. Several species within Aspergillus section Flavi have been implicated as causal agents of aflatoxin contamination in Africa. However, Aspergillus populations associated with aflatoxin contamination in Zambia have not been adequately detailed. Most of Zambia's arable land is non-cultivated and Aspergillus communities in crops may originate in non-cultivated soil...
August 19, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28914778/screening-for-autochthonous-phytoextractors-in-a-heavy-metal-contaminated-coal-mining-area
#13
Kuangjia Li, Zijian Lun, Lin Zhao, Qilong Zhu, Yansheng Gu, Manzhou Li
In order to protect public health and crops from soil heavy metal (HM) contamination at a coal mining area in Henan, central China, HM pollution investigation and screening of autochthonous HM phytoextractors were conducted. The concentrations of cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) in surface soils exceeded the corresponding local background values and the China National Standard (CNS). The maximum potential ecological risk (RI) was 627.30, indicating very high ecological risk. The monomial risk of Cd contributed the most to the RI, varying from 85...
September 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28914413/study-of-the-mechanism-of-remediation-of-cd-contaminated-soil-by-novel-biochars
#14
Zhongxin Tan, Yuanhang Wang, Limei Zhang, Qiaoyun Huang
This article used novel non-magnetized and magnetized biochars prepared under a CO2 atmosphere returned to Cd-contaminated soil and compared these to the effects of conventional biochars prepared under a N2 atmosphere with regard to Cd-contaminated soil remediation. A pot experiment with lettuce (Lactuca sativa) was conducted to investigate the relative soil remediation effects of these biochars. The soil used for the pot experiment was spiked with 20 mg kg(-1) Cd and amended with 5% of a biochar before sowing...
September 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28914181/remediation-approach-for-organic-compounds-and-arsenic-co-contaminated-soil-using-pressurized-hot-water-extraction-process
#15
Mohammad Nazrul Islam, Young-Tae Jo, Yeon-Jae Jeong, Jeong-Hun Park
Successful remediation of soil with co-existing organics contaminants and arsenic (As) is a challenge as the chemical and remediation technologies are different for each group of pollutants. In this study, the treatment effectiveness of pressurized hot water (PHW) extraction process was investigated for remediation of soil co-contaminated with phenol, crude oil, polycyclic aromatic hydrocarbons (PAHs) and As. An elimination percentage of about 99% was achieved for phenol, and in the range of 63-100% was observed for the PAHs at 260 °C for 90 min operation...
September 15, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28913724/use-of-phytoproductivity-data-in-the-choice-of-native-plant-species-to-restore-a-degraded-coal-mining-site-amended-with-a-stabilized-industrial-organic-sludge
#16
Claudete G Chiochetta, Hela Toumi, Renata F S Böhm, Fernanda Engel, Gabriel Poyer-Radetski, Leonardo R Rörig, Fabrizio Adani, Claudemir M Radetski
Coal mining-related activities result in a degraded landscape and sites associated with large amounts of dumped waste material. The arid soil resulting from acid mine drainage affects terrestrial and aquatic ecosystems, and thus, site remediation programs must be implemented to mitigate this sequential deleterious processes. A low-cost alternative material to counterbalance the affected physico-chemical-microbiological aspects of the degraded soil is the amendment with low contaminated and stabilized industrial organic sludge...
September 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28913678/comparison-of-point-source-pollutant-loadings-to-soil-and-groundwater-for-72-chemical-substances
#17
Soonyoung Yu, Sang-Il Hwang, Seong-Taek Yun, Gitak Chae, Dongsu Lee, Ki-Eun Kim
Fate and transport of 72 chemicals in soil and groundwater were assessed by using a multiphase compositional model (CompFlow Bio) because some of the chemicals are non-aqueous phase liquids or solids in the original form. One metric ton of chemicals were assumed to leak in a stylized facility. Scenarios of both surface spills and subsurface leaks were considered. Simulation results showed that the fate and transport of chemicals above the water table affected the fate and transport of chemicals below the water table, and vice versa...
September 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28913631/comparative-proteomic-analysis-and-characterization-of-benzo-a-pyrene-removal-by-microbacterium-sp-strain-m-csw3-under-denitrifying-conditions
#18
Wei Qin, FuQiang Fan, Yi Zhu, Yingying Wang, Xiang Liu, Aizhong Ding, Junfeng Dou
High-molecular-weight polycyclic aromatic hydrocarbons are persistent organic pollutants with great environmental and human health risks and the associated bioremediation activities have always been hampered by the lack of powerful bacterial species under redox conditions. A Microbacterium sp. strain capable of using benzo(a)pyrene as sole carbon and energy sources under denitrifying conditions was isolated. The difference in protein expression during BaP removal and removal characterization were investigated...
September 14, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28910732/degradation-of-toxic-pahs-in-water-and-soil-using-potassium-zinc-hexacyanoferrate-nanocubes
#19
Uma Shanker, Vidhisha Jassal, Manviri Rani
Polycyclic aromatic hydrocarbons (PAHs) the ubiquitous, persistent and carcinogenic environmental contaminants have raised concern worldwide. Recently, their removal methodologies are advanced after exploring nanomaterials. Therefore, degradation of selected toxic PAHs (3-5 rings) using potassium zinc hexacyanoferrate (KZnHCF) nanocubes was studied. Highly crystalline and sharp KZnHCF nanocubes (∼100 nm) were obtained by green route using sapindus mukorossi. In both water and soil, anthracene and phenanthrene were degraded to maximum extent (80-93%), whereas, the degradation of fluorene, chrysene and benzo (a) pyrene were ∼70-80%...
September 11, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28903604/remediation-of-contaminated-soils-by-biotechnology-with-nanomaterials-bio-behavior-applications-and-perspectives
#20
Xiaomin Gong, Danlian Huang, Yunguo Liu, Zhiwei Peng, Guangming Zeng, Piao Xu, Min Cheng, Rongzhong Wang, Jia Wan
Soil contamination caused by heavy metals and organic pollutants has drawn world-wide concern. Biotechnology has been applied for many years to the decontamination of soils polluted with organic and inorganic contaminants, and novel nanomaterials (NMs) has attracted much concern due to their high capacity for the removal/stabilization/degradation of pollutants. Recently, developing advanced biotechnology with NMs for the remediation of contaminated soils has become a hot research topic. Some researchers found that bioremediation efficiency of contaminated soils was enhanced by the addition of NMs, while others demonstrated that the toxicity of NMs to the organism negatively influenced the repair capacity of polluted soils...
September 13, 2017: Critical Reviews in Biotechnology
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