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https://www.readbyqxmd.com/read/29352640/recent-advancements-in-bioremediation-of-dye-current-status-and-challenges
#1
REVIEW
Kumar Vikrant, Balendu Shekhar Giri, Nadeem Raza, Kangkan Roy, Ki-Hyun Kim, Birendra Nath Rai, Ram Sharan Singh
The rampant industrialization and unchecked growth of modern textile production facilities coupled with the lack of proper treatment facilities have proliferated the discharge of effluents enriched with toxic, baleful, and carcinogenic pollutants including dyes, heavy metals, volatile organic compounds, odorants, and other hazardous materials. Therefore, the development of cost-effective and efficient control measures against such pollution is imperative to safeguard ecosystems and natural resources. In this regard, recent advances in biotechnology and microbiology have propelled bioremediation as a prospective alternative to traditional treatment methods...
January 8, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29352397/bio-prospectus-of-cadmium-bioadsorption-by-lactic-acid-bacteria-to-mitigate-health-and-environmental-impacts
#2
REVIEW
Narendra Kumar, Vandna Kumari, Chand Ram, Kiran Thakur, Sudhir Kumar Tomar
Foodstuffs and water are the key sources of cadmium biomagnifiaction. The available strategies to mitigate this problem are unproductive and expensive for practical large-scale use. Biological decontamination of metals through environmental microbes has been known since long time, whereas lactic acid bacteria (LAB) have not been extensively studied for this purpose. The LAB are known for maintaining homeostasis and suppression of pathogens in humans and animals. They also play a vital role in bioremediation of certain heavy metals...
January 19, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29352203/advanced-modified-polyacrylonitrile-membrane-with-enhanced-adsorption-property-for-heavy-metal-ions
#3
Xinfeng Zhang, Shujing Yang, Bing Yu, Qinglong Tan, Xiaoyan Zhang, Hailin Cong
Advanced modified polyacrylonitrile (PAN) membrane with high adsorption property for heavy metal ions was designed and fabricated for the first time. The introduced diazoresin-ethylenediaminetetraacetic acid (DR-EDTA) layer could effectively absorb the metal ion, such as Cu2+, Pb2+, Hg2+ in the waste water. The effects of layers, metal ion concentration, pH, temperature and cycle time were investigated. The results showed that the adsorption isotherms for Cu2+ were well fitted by Langmuir model. The maximum adsorption capacity of the modified membrane for Cu2+ was approximately 47...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352200/meta-analysis-of-soil-mercury-accumulation-by-vegetables
#4
Haixin Yu, Jing Li, Yaning Luan
Mercury pollution in soil poses serious risks to human health through consumption of contaminated vegetables. We used a meta-analysis to examine the mercury enrichment ability of different vegetables and the main factors affecting mercury uptake. We drew the following conclusions. (1) Plants with a lower bioconcentration factor (BCF) include cowpea, long bean, and radish, whereas plants with a higher BCF include green pepper, spinach, cabbage, and Chinese cabbage. (2) Leaf and cucurbit have the highest and lowest capacity, respectively, for mercury enrichment...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352079/identification-and-validation-of-a-new-source-of-low-grain-cadmium-accumulation-in-durum-wheat
#5
Atena Oladzad Abbasabadi, Ajay Kumar, Seyed Pirseyedi, Evan Salsman, Marina Dobrydina, Roshan Sharma Poudel, Wesam A AbuHammad, Shiaoman Chao, Justin D Faris, Elias M Elias
Cadmium (Cd) is a heavy metal that has no known biological function and is toxic for many living organisms. The maximum level of Cd concentration allowed in the international market for wheat grain is 0.2 mg kg-1. Because phenotyping for Cd uptake is expensive and time consuming, molecular markers associated with genes conferring low Cd uptake would expedite selection and lead to the development of durum cultivars with reduced Cd concentrations. Here, we identified single nucleotide polymorphisms (SNPs) associated with a novel low Cd uptake locus in the durum experimental line D041735, which has hexaploid common wheat in its pedigree...
January 19, 2018: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29351883/titanium-dioxide-nanoparticle-exposure-reduces-algal-biomass-and-alters-algal-assemblage-composition-in-wastewater-effluent-dominated-stream-mesocosms
#6
Moncie V Wright, Cole W Matson, Leanne S Baker, Benjamin T Castellon, Preston S Watkins, Ryan S King
A 5-week mesocosm experiment was conducted to investigate the toxicity of titanium dioxide nanoparticles (TiO2NPs) to periphytic algae in an environmentally-realistic scenario. We used outdoor experimental streams to simulate the characteristics of central Texas streams receiving large discharges of wastewater treatment plant effluent during prolonged periods of drought. The streams were continually dosed and maintained at two concentrations. The first represents an environmentally relevant concentration of 0...
January 16, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29351606/analysis-of-metal-tolerance-in-rhizobium-leguminosarum-strains-isolated-from-an-ultramafic-soil
#7
Laura Rubio-Sanz, Belén Brito, Jose Palacios
Natural habitats containing high amounts of heavy metals provide a valuable source of bacteria adapted to deal with metal toxicity. A functional analysis of the population of legume endosymbiotic bacteria in an ultramafic soil was undertaken by studying a collection of Rhizobium leguminosarum bv viciae (Rlv) isolates obtained using pea as trap plant. One of the isolates, Rlv UPM1137, was selected on the basis of its higher tolerance to nickel and cobalt and presence of inducible mechanisms for such tolerance...
January 17, 2018: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29350354/magnetic-geochemical-characterization-and-health-risk-assessment-of-road-dust-in-xuanwei-and-fuyuan-china
#8
Zhengying Tan, Senlin Lu, Hui Zhao, Xiao Kai, Peng Jiaxian, Myat Sandar Win, Shang Yu, Shinich Yonemochi, Qingyue Wang
As an accumulation of solid organic and inorganic pollutant particles on outdoor ground surfaces, road dust is an important carrier of heavy metal contaminants and can be a valuable medium for characterizing urban environmental quality. Because the dusts can be an important source of atmospheric particles and take impact on human health, the aim of this study described in detail the mineralogical characteristics, morphology, and heavy metal content of road dust from Xuanwei and Fuyuan, locations with high lung cancer incidence...
January 19, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29349943/environmental-and-body-concentrations-of-heavy-metals-at-sites-near-and-distant-from-industrial-complexes-in-ulsan-korea
#9
Joo Hyun Sung, Inbo Oh, Ahra Kim, Jiho Lee, Chang Sun Sim, Cheolin Yoo, Sang Jin Park, Geun Bae Kim, Yangho Kim
BACKGROUND: Industrial pollution may affect the heavy metal body burden of people living near industrial complexes. We determined the average concentrations of atmospheric heavy metals in areas close to and distant from industrial complexes in Korea, and the body concentrations of these heavy metals in residents living near and distant from these facilities. METHODS: The atmospheric data of heavy metals (lead and cadmium) were from the Regional Air Monitoring Network in Ulsan...
January 29, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29349918/dual-drug-backboned-shattering-polymeric-theranostic-nanomedicine-for-synergistic-eradication-of-patient-derived-lung-cancer
#10
Yuwei Cong, Haihua Xiao, Hejian Xiong, Zigui Wang, Jianxun Ding, Chan Li, Xuesi Chen, Xing-Jie Liang, Dongfang Zhou, Yubin Huang
Most of the current nanoparticle-based therapeutics worldwide failing in clinical trials face three major challenges: (i) lack of an optimum drug delivery platform with precise composition, (ii) lack of a method of directly monitoring the fate of a specific drug rather than using any other labelling molecules as a compromise, and (iii) lack of reliable cancer models with high fidelity for drug screen and evaluation. Here, starting from a PP2A inhibitor demethylcantharidin (DMC) and cisplatin, the design of a dual sensitive dual drug backboned shattering polymer (DDBSP) with exact composition at a fixed DMC/Pt ratio for precise nanomedicine is shown...
January 19, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29349744/alleviation-of-iron-toxicity-in-schinus-terebinthifolius-raddi-anacardiaceae-by-humic-substances
#11
Leonardo Barros Dobbss, Tamires Cruz Dos Santos, Marco Pittarello, Sávio Bastos de Souza, Alessandro Coutinho Ramos, Jader Galba Busato
One of the industrial pillars of Espírito Santo state, South East of Brazil, is iron-mining products processing. This activity brings to a high level of coastal pollution due to deposition of iron particulate on fragile ecosystems as mangroves and restinga. Schinus therebinthifolius (aroeira) is a widespread restinga species. This work tested iron toxicity alleviation by vermicompost humic substances (HS) added to aroeira seedlings in hydroponic conditions. Catalase, peroxidase, and ascorbate peroxidase are antioxidant enzymes that work as reactive oxygen species (ROS) scavengers: they increase their activity as an answer to ROS concentration rise that is the consequence of metal accumulation or humic substance stimulation...
January 19, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29349740/can-cd-translocation-in-oryza-sativa-l-be-attenuated-by-arbuscular-mycorrhizal-fungi-in-the-presence-of-edta
#12
Xiaochen Huang, Guangnan An, Shishu Zhu, Li Wang, Fang Ma
Arbuscular mycorrhizal (AM) fungi play an important role in plant tolerance of heavy metal contamination. In this study, a pot experiment was conducted to illustrate the effects of the two AM fungi species Funneliformis mosseae (Fm) and Rhizophagus irregularis (Ri) on plant growth of Oryza sativa L. either with or without ethylenediamine tetraacetate (EDTA) addition and during exposure to five Cd concentrations (in the range of 0-5 mg kg-1). The results showed that Fm inoculation achieved greater mycorrhizal colonization and mycorrhizal dependency indexes than Ri inoculation...
January 18, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29348658/novel-multifunctional-cheese-like-3d-carbon-bn-as-a-highly-efficient-adsorbent-for-water-purification
#13
Zhenya Liu, Yi Fang, Huichao Jia, Chong Wang, Qianqian Song, Lanlan Li, Jing Lin, Yang Huang, Chao Yu, Chengchun Tang
In this paper, a novel three dimensional carbon boron nitride (3D C-BN) was successfully prepared. The obtained material has porous cheese-like structure and pore size ranging from 2 nm to 100 nm. Attractively, the 3D C-BN, which combines the adsorption advantages of BN and carbon together, exhibits excellent adsorption properties for organic dyes, oils and heavy metal ions. The maximum removal capacities of 3D C-BN for methyl blue (MB) and congo red (CR) are 408 mg g-1 and 307 mg g-1, respectively...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29348058/elemental-assessment-of-vegetation-via-portable-x-ray-fluorescence-pxrf-spectrometry
#14
Candice McGladdery, David C Weindorf, Somsubhra Chakraborty, Bin Li, Laura Paulette, Dorina Podar, Delaina Pearson, Nana Yaw O Kusi, Bogdan Duda
Elemental concentrations in vegetation are of critical importance, whether establishing plant essential element concentrations (toxicity vs. deficiency) or investigating deleterious elements (e.g., heavy metals) differentially extracted from the soil by plants. Traditionally, elemental analysis of vegetation has been facilitated by acid digestion followed by quantification via inductively coupled plasma (ICP) or atomic absorption (AA) spectroscopy. Previous studies have utilized portable X-ray fluorescence (PXRF) spectroscopy to quantify elements in soils, but few have evaluated the vegetation...
January 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29346586/plasflow-predicting-plasmid-sequences-in-metagenomic-data-using-genome-signatures
#15
Pawel S Krawczyk, Leszek Lipinski, Andrzej Dziembowski
Plasmids are mobile genetics elements that play an important role in the environmental adaptation of microorganisms. Although plasmids are usually analyzed in cultured microorganisms, there is a need for methods that allow for the analysis of pools of plasmids (plasmidomes) in environmental samples. To that end, several molecular biology and bioinformatics methods have been developed; however, they are limited to environments with low diversity and cannot recover large plasmids. Here, we present PlasFlow, a novel tool based on genomic signatures that employs a neural network approach for identification of bacterial plasmid sequences in environmental samples...
January 13, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29345546/enhanced-biosorption-of-transition-metals-by-living-chlorella-vulgaris-immobilized-in-ca-alginate-beads
#16
Ashfaq Ahmad, A H Bhat, Azizul Buang
In this study freely suspended and Ca-alginate immobilized C. vulgaris cells were used for the biosorption of Fe(II), Mn(II), and Zn(II) ions, from the aqueous solution. Experimental data showed that biosorption capacity of algal cells was strongly dependent on the operational condition such as pH, initial metal ions concentration, dosages, contact time and temperature. The maximum biosorption of Fe(II) 43.43, Mn(II) 40.98 and Zn(II) 37.43 mg/g was achieved with Ca-alginate immobilized algal cells at optimum pH of 6...
January 18, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29343726/remarkably-high-hole-mobility-metal-oxide-thin-film-transistors
#17
Cheng Wei Shih, Albert Chin, Chun Fu Lu, Wei Fang Su
High performance p-type thin-film transistor (p-TFT) was realized by a simple process of reactive sputtering from a tin (Sn) target under oxygen ambient, where remarkably high field-effect mobility (μ FE ) of 7.6 cm2/Vs, 140 mV/dec subthreshold slope, and 3 × 104 on-current/off-current were measured. In sharp contrast, the SnO formed by direct sputtering from a SnO target showed much degraded μ FE , because of the limited low process temperature of SnO and sputtering damage. From the first principle quantum-mechanical calculation, the high hole μ FE of SnO p-TFT is due to its considerably unique merit of the small effective mass and single hole band without the heavy hole band...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29342877/accumulation-of-heavy-metals-in-tea-leaves-and-potential-health-risk-assessment-a-case-study-from-puan-county-guizhou-province-china
#18
Jian Zhang, Ruidong Yang, Rong Chen, Yishu Peng, Xuefeng Wen, Lei Gao
This study features a survey of the concentrations of aluminum (Al) and heavy metals (Mn, Pb, Cd, Hg, As, Cr, Ni, Cu, and Zn) in tea leaves and the corresponding cultivation soils (0-30 cm), carried out in Puan County (Guizhou Province, China). The average concentrations of Al, Mn, Pb, Cd, Hg, As, Cr, Ni, Cu, and Zn in the soil were 106 × 10³, 214, 20.9, 0.09, 0.12, 17.5, 121, 27.8, 131.2, and 64 mg·kg-1, respectively. The heavy metals' pollution indexes in the soil can be ranked as follows: Cu > Cr > Hg > As > Ni > Zn > Pb > Mn > Cd...
January 13, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29341878/concentrations-of-arsenic-and-lead-in-rice-oryza-sativa-l-in-iran-a-systematic-review-and-carcinogenic-risk-assessment
#19
Yadolah Fakhri, Geir Bjørklund, Anoushiravan Mohseni Bandpei, Salvatore Chirumbolo, Hassan Keramati, Rokhsane Hosseini Pouya, Anvar Asadi, Nazak Amanidaz, Mansour Sarafraz, Amir Sheikhmohammadi, Zahra Baninameh, Seyed Mohsen Mohseni, Maryam Sarkhosh, Seyed Mehdi Ghasemi
Exposure to heavy metals such as arsenic (As), lead (Pb), and cadmium (Cd) in either the short or the long term can cause cancers in humans. Dietary intake and consumption of rice (Oryza sativa L.) is increasing in Iran, and several studies on the concentration of heavy metals in rice have been carried out in this country in recent years. In this perspective, the main objective of the present study was to investigate, even via a meta-analysis of the existing literature, the presence of As and Pb in rice from many geographical areas in Iran, as well as to estimate the carcinogenic risk of these heavy metals in rice consumers...
January 13, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29341631/rapid-transition-of-the-hole-rashba-effect-from-strong-field-dependence-to-saturation-in-semiconductor-nanowires
#20
Jun-Wei Luo, Shu-Shen Li, Alex Zunger
The electric field manipulation of the Rashba spin-orbit coupling effects provides a route to electrically control spins, constituting the foundation of the field of semiconductor spintronics. In general, the strength of the Rashba effects depends linearly on the applied electric field and is significant only for heavy-atom materials with large intrinsic spin-orbit interaction under high electric fields. Here, we illustrate in 1D semiconductor nanowires an anomalous field dependence of the hole (but not electron) Rashba effect (HRE)...
September 22, 2017: Physical Review Letters
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