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https://www.readbyqxmd.com/read/28454053/source-identification-and-exchangeability-of-heavy-metals-accumulated-in-vegetable-soils-in-the-coastal-plain-of-eastern-zhejiang-province-china
#1
Xu Qiutong, Zhang Mingkui
Vegetable production in China is suffering increasingly heavy metal damages from various pollution sources including agricultural, industrial and other activities. It is of practical significance to understand the effects of human activities on the accumulation and exchangeability of soil heavy metals in vegetable fields. In this study, seventy-two arable layer samples of vegetable soils were collected from the Shaoxing coastal plain, a representative region of the coastal plain of eastern Zhejiang province, China for characterizing the effects of fertilization methods on accumulation and exchangeable heavy metals in soils (Exchangeable heavy metals in the soil samples were extracted by 0...
April 25, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28454040/the-role-of-dissimilatory-arsenate-reducing-bacteria-in-the-biogeochemical-cycle-of-arsenic-based-on-the-physiological-and-functional-analysis-of-aeromonas-sp-o23a
#2
Witold Uhrynowski, Klaudia Debiec, Aleksandra Sklodowska, Lukasz Drewniak
Dissimilatory arsenate reducing bacteria (DARB) are known to contribute to the mobilization of arsenic and other elements from minerals. Despite this, metabolic capabilities of only a few DARB strains have been thoroughly investigated so far, and the influence of these bacteria on the bioavailability of arsenic in the environment is still a topic for discussion. In this study, Aeromonas sp. O23A, one of the dominant DARB strains found in the Zloty Stok mine (SW Poland), was subjected to a detailed physiological and functional analysis aimed to identify the actual environmental impact of this strain...
April 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28454018/chemical-characteristic-of-pm2-5-emission-and-inhalational-carcinogenic-risk-of-domestic-chinese-cooking
#3
Nan Zhang, Bin Han, Fei He, Jia Xu, Ruojie Zhao, Yujuan Zhang, Zhipeng Bai
To illustrate chemical characteristic of PM2.5 emission and assess inhalational carcinogenic risk of domestic Chinese cooking, 5 sets of duplicate cooking samples were collected, using the most used 5 types of oil. The mass abundance of 14 elements, 5 water-soluble ions, organic carbon (OC), elemental carbon (EC) and 11 polycyclic aromatic hydrocarbons (PAHs) were calculated; the signature and diagnostic ratio of cooking in the domestic kitchen were analyzed; and carcinogenic risks of heavy metals and PAHs via inhalation were assessed in two scenarios...
April 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28453515/reliable-reference-genes-for-normalization-of-gene-expression-data-in-tea-plants-camellia-sinensis-exposed-to-metal-stresses
#4
Ming-Le Wang, Qing-Hui Li, Hua-Hong Xin, Xuan Chen, Xu-Jun Zhu, Xing-Hui Li
Tea plants [Camellia sinensis (L.) O. Kuntze] are an important leaf-type crop that are widely used for the production of non-alcoholic beverages in the world. Exposure to excessive amounts of heavy metals adversely affects the quality and yield of tea leaves. To analyze the molecular responses of tea plants to heavy metals, a reliable quantification of gene expression is important and of major importance herein is the normalization of the measured expression levels for the target genes. Ideally, stably expressed reference genes should be evaluated in all experimental systems...
2017: PloS One
https://www.readbyqxmd.com/read/28448918/erosion-of-the-alberta-badlands-produces-highly-variable-and-elevated-heavy-metal-concentrations-in-the-red-deer-river-alberta
#5
Jason G Kerr, Colin A Cooke
Erosion is important in the transport of heavy metals from terrestrial to fluvial environments. In this study, we investigated riverine heavy metal (Cd, Cu, Hg and Pb) dynamics in the Red Deer River (RDR) watershed at sites upstream (n=2) and downstream (n=7) of the Alberta badlands, an area of naturally high erosion. At sites draining the badlands, total water column Cd, Cu, Hg and Pb concentrations frequently exceeded guidelines for the protection of freshwater biota. Furthermore, peak concentrations of total Cd (9...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448909/changes-in-heavy-metal-mobility-and-availability-from-contaminated-wetland-soil-remediated-with-combined-biochar-compost
#6
Jie Liang, Zhaoxue Yang, Lin Tang, Guangming Zeng, Man Yu, Xiaodong Li, Haipeng Wu, Yingying Qian, Xuemei Li, Yuan Luo
The combination of biochar and compost has been proven to be effective in heavy metals contaminated wetland soil restoration. However, the influence of different proportions between biochar and compost on immobilization of heavy metals in soil has been less studied up to date. Therefore, we investigated the effect of different ratios of biochar-compost mixtures on availability and speciation distribution of heavy metals (Cd, Zn and Cu) in wetland soil. The results showed that applying all amendment combinations into wetland soil increased gradually the total organic carbon (TOC) and water-extract organic carbon (WEOC) as the compost percentage rose in biochar-composts...
April 24, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448907/characterization-of-typical-metal-particles-during-haze-episodes-in-shanghai-china
#7
Rui Li, Xin Yang, Hongbo Fu, Qingqing Hu, Liwu Zhang, Jianmin Chen
Aerosol particles were collected during three heavy haze episodes at Shanghai in the winter of 2013. Transmission electron microscopy (TEM) coupled with energy dispersive X-ray spectroscopy was used to study the morphology and speciation of typical metal particles at a single-particle level. In addition, time-of-flight aerosol mass spectrometry (ATOFMS) was applied to identify the speciation of the Fe-containing particles. TEM analysis indicated that various metal-containing particles were hosted by sulfates, nitrates, and oxides...
April 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448811/effect-of-addition-of-sewage-sludge-and-coal-sludge-on-bioavailability-of-selected-metals-in-the-waste-from-the-zinc-and-lead-industry
#8
Jolanta Sobik-Szołtysek, Katarzyna Wystalska, Anna Grobelak
This study evaluated the content of bioavailable forms of selected heavy metals present in the waste from Zn and Pb processing that can potentially have an effect on the observed difficulties in reclamation of landfills with this waste. The particular focus of the study was on iron because its potential excess or deficiency may be one of the causes of the failure in biological reclamation. The study confirmed that despite high content of total iron in waste (mean value of 200.975gkg(-1)), this metal is present in the forms not available to plants (mean: 0...
April 24, 2017: Environmental Research
https://www.readbyqxmd.com/read/28448168/management-of-textile-wastewater-for-improving-growth-and-yield-of-field-mustard-brassica-campestris-l
#9
Muhammad Yaseen, Muhammad Zahir Aziz, Aqleema Komal, Muhammad Naveed
Disposal of industrial wastewater is a current issue of urbanization. However, this problem can be sorted by using wastewater as alternate source of irrigation after the addition of some amendment. In this way, the problem of disposal of wastewater not only will be resolved but also scarcity of irrigation water can be kept off in future. Current research study was performed to evaluate the influence of different concentration of wastewater along with canal water for enhancing growth and yield of field mustard...
April 27, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28448110/heavy-metals-induce-decline-of-derivatives-of-5-methycytosine-in-both-dna-and-rna-of-stem-cells
#10
Jun Xiong, Xiaona Liu, Qing-Yun Cheng, Shan Xiao, Lai-Xin Xia, Bifeng Yuan, Yu-Qi Feng
Toxic heavy metals have been considered to be harmful environmental contaminations. The molecular mechanisms of heavy metals-induced cytotoxicity and carcinogenicity are still not well elucidated. Previous reports showed exposures to toxic heavy metals can cause change of DNA cytosine methylation (5-methylcytosine, 5-mC). However, it is still not clear whether heavy metals have effects on the recently identified new epigenetic marks in both DNA and RNA, i.e., 5-hydroxymethylcytosine (5-hmC), 5-formylcytosine (5-foC), and 5-carboxylcytosine (5-caC)...
April 27, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28447797/signal-transductions-of-beas-2b-cells-in-response-to-carcinogenic-pm2-5-exposure-based-on-microfluidic-system
#11
Lulu Zheng, Sixiu Liu, Guoshun Zhuang, Jian Xu, Qi Liu, Xinlian Zhang, Congrui Deng, Zhigang Guo, Wang Zhao, Tingna Liu, Yiqi Wang, Yuxiao Zhang, Jing Lin, Qiongzhen Wang, Guodong Sui
PM2.5 (particulate matter less than 2.5 micrometers in diameter) is considered as a harmful carcinogen. Determining the precise relationship between the chemical constituents of PM2.5 in the air and cancer progression could aid the treatment of environment related disease and establishing risk reduction strategies. Herein, we used transcriptomics (RNA-seq) and integrated microfluidic system to identify the global gene expression and differential target proteins expression induced by ambient fine particles collected from the heavy haze in China...
April 27, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28447234/remediation-of-soils-contaminated-with-heavy-metals-with-an-emphasis-on-immobilization-technology
#12
REVIEW
Zahra Derakhshan Nejad, Myung Chae Jung, Ki-Hyun Kim
The major frequent contaminants in soil are heavy metals which may be responsible for detrimental health effects. The remediation of heavy metals in contaminated soils is considered as one of the most complicated tasks. Among different technologies, in situ immobilization of metals has received a great deal of attention and turned out to be a promising solution for soil remediation. In this review, remediation methods for removal of heavy metals in soil are explored with an emphasis on the in situ immobilization technique of metal(loid)s...
April 26, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28446841/occupation-related-chromium-toxicity-a-rare-cause-of-renal-failure-and-rhabdomyolysis
#13
Manjeera Jagannati, I Ramya, Sowmya Sathyendra
A 21-year-old gentleman, a worker in a mobile phone shop, was admitted with rhabdomyolysis, renal failure, and pulmonary edema requiring mechanical ventilation and hemodialysis. After extensive workup and ruling out other causes, heavy metal poisoning was considered. Investigations during the course of the hospital stay revealed chromium poisoning. With repeated hemodialysis, his parameters normalized and he was discharged home in a stable condition. Diagnosis of chromium toxicity needs high index of suspicion...
September 2016: Indian Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28446756/a-chemically-patterned-microfluidic-paper-based-analytical-device-c-%C3%A2%C2%B5pad-for-point-of-care-diagnostics
#14
Trinh Lam, Jasmine P Devadhasan, Ryan Howse, Jungkyu Kim
A chemically patterned microfluidic paper-based analytical device (C-µPAD) is developed to create fluidic networks by forming hydrophobic barriers using chemical vapor deposition (CVD) of trichlorosilane (TCS) on a chromatography paper. By controlling temperature, pattern size, and CVD duration, optimal conditions were determined by characterizing hydrophobicity, spreading patterns, and flow behavior on various sized fluidic patterns. With these optimal conditions, we demonstrated glucose assay, immunoassay, and heavy metal detection on well-spot C-µPAD and lateral flow C-µPAD...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28444473/contrasting-effects-of-engineered-carbon-nanotubes-on-plants-a-review
#15
Meththika Vithanage, Mihiri Seneviratne, Mahtab Ahmad, Binoy Sarkar, Yong Sik Ok
Rapid surge of interest for carbon nanotube (CNT) in the last decade has made it an imperative member of nanomaterial family. Because of the distinctive physicochemical properties, CNTs are widely used in a number of scientific applications including plant sciences. This review mainly describes the role of CNT in plant sciences. Contradictory effects of CNT on plants physiology are reported. CNT can act as plant growth inducer causing enhanced plant dry biomass and root/shoot lengths. At the same time, CNT can cause negative effects on plants by forming reactive oxygen species in plant tissues, consequently leading to cell death...
April 25, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28443071/deletion-of-lipoteichoic-acid-synthase-impacts-expression-of-genes-encoding-cell-surface-proteins-in-lactobacillus-acidophilus
#16
Kurt Selle, Yong J Goh, Brant R Johnson, Sarah O'Flaherty, Joakim M Andersen, Rodolphe Barrangou, Todd R Klaenhammer
Lactobacillus acidophilus NCFM is a well-characterized probiotic microorganism, supported by a decade of genomic and functional phenotypic investigations. L. acidophilus deficient in lipoteichoic acid (LTA), a major immunostimulant in Gram-positive bacteria, has been shown to shift immune system responses in animal disease models. However, the pleiotropic effects of removing LTA from the cell surface in lactobacilli are unknown. In this study, we surveyed the global transcriptional and extracellular protein profiles of two strains of L...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28442201/temporal-variations-in-physiological-responses-of-kandelia-obovata-seedlings-exposed-to-multiple-heavy-metals
#17
Shanshan Cheng, Nora Fung Yee Tam, Ruili Li, Xiaoxue Shen, Zhiyuan Niu, Minwei Chai, Guo Yu Qiu
A study was conducted to quantify temporal variations in physiological responses of Kandelia obovata under multiple heavy metal stress. The results showed that plant growth was not significantly affected by multiple heavy metal stress during the 120-days experiment. At the start, levels of net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) showed effects of "low-promotion, high-inhibition", but Pn and Gs reduced with increasing heavy metal stress at the end. Temporary lipid oxidation was shown by high levels of malondialdehyde (MDA) under high heavy metal stress at the start but was unaffected at the end of the experiment...
April 22, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28441919/si-based-technologies-for-reduction-of-the-pollutant-leaching-from-landfills-and-mine-tails
#18
E Bocharnikova, V Matichenkov, J Jiang, C Yuejin
Monosilicic and polysilicic acids were shown to react with different types of the pollutants. The direction of these reactions can be managed by changing the monosilicic and polysilicic acid concentration in soil or water media. The objective of this study was to determine the effect of Si-treated calcium metallurgical slag and battery slag on the As, Se, Cd, Pb, Ni, Cr, and Hg mobility and bioavailability in mine tailings (Xikuangshan mine, Hunan, China). The results of column experiment showed that the Si-activated slags reduced leaching of As, Se, Cd, Pb, Ni, Cr, and Hg by 12 to 88% and transformed them into plant-unavailable forms...
April 25, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28441611/genotoxic-effect-of-pb-and-cd-on-in%C3%A2-vitro-cultures-of-sphagnum-palustre-an-evaluation-by-issr-markers
#19
Maria Cristina Sorrentino, Fiore Capozzi, Simonetta Giordano, Valeria Spagnuolo
In the present work, the genotoxic effect of cadmium and lead supplied in a laboratory trial, was investigated for the first time in the moss Sphagnum palustre, by ISSR molecular markers. A total of 169 reproducible bands were obtained with 12 primers, ten of which gave polymorphisms (i.e., appearance/disappearance of bands), indicating a clear genotoxic effect induced by the metals. Both metals induced a decrease of the genome template stability in a dose dependent manner. At concentration >10(-5) Cd also induced a general toxic effect in S...
April 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28441590/screening-arabidopsis-mutants-in-genes-useful-for-phytoremediation
#20
María Sanz-Fernández, María Rodríguez-Serrano, Ana Sevilla-Perea, Liliana Pena, M Dolores Mingorance, Luisa M Sandalio, María C Romero-Puertas
Emissions of heavy metals have risen over the past 200 years and significantly exceed those from natural sources. Phytoremediation strategies may be able to recover soil productivity in self-sustaining ecosystems; however, our knowledge of the molecular mechanisms involved in plant heavy-metal perception and signalling is scarce. The aim of this study was to assemble a "molecular tool box" of genes useful for phytoremediation. To identify mutants with different heavy-metal-tolerance, we first selected a medium from mixtures containing three metals based on their presence in two Spanish mining areas and then screened about 7000 lines of Arabidopsis T-DNA mutants and found 74 lines more resistant and 56 more susceptible than the wild type (WT)...
April 7, 2017: Journal of Hazardous Materials
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