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Bioremediation

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https://www.readbyqxmd.com/read/28212109/sustainable-exposure-prevention-through-innovative-detection-and-remediation-technologies-from-the-niehs-superfund-research-program
#1
Heather F Henry, William A Suk
Innovative devices and tools for exposure assessment and remediation play an integral role in preventing exposure to hazardous substances. New solutions for detecting and remediating organic, inorganic, and mixtures of contaminants can improve public health as a means of primary prevention. Using a public health prevention model, detection and remediation technologies contribute to primary prevention as tools to identify areas of high risk (e.g. contamination hotspots), to recognize hazards (bioassay tests), and to prevent exposure through contaminant cleanups...
February 17, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28208114/efficient-degradation-of-chlorimuron-ethyl-by-a-bacterial-consortium-and-shifts-in-the-aboriginal-microorganism-community-during-the-bioremediation-of-contaminated-soil
#2
Chunyan Li, Tongyang Lv, Wanjun Liu, Hailian Zang, Yi Cheng, Dapeng Li
Excessive application of chlorimuron-ethyl has led to soil contamination and limited crop rotation; therefore, tactics to decrease and eliminate residual chlorimuron-ethyl in the environment have attracted increasing attention. In this study, two chlorimuron-ethyl-degrading bacterial strains (Rhodococcus sp. D310-1; Enterobacter sp. D310-5) were used to ferment and prepare a chlorimuron-ethyl-degrading bacterial consortium. To improve the degradation efficiency of the bacterial consortium, the cultivation conditions were optimized using response surface methodology (RSM)...
February 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28204952/a-preliminary-report-of-indigenous-fungal-isolates-from-contaminated-municipal-solid-waste-site-in-india
#3
Abhishek Kumar Awasthi, Akhilesh Kumar Pandey, Jamaluddin Khan
Municipal solid waste (MSW) containing harmful substances is a major concern in waste management and can cause adverse effects on diversity of fungi in soil. The main objective was to evaluate the fungal diversity inhabiting in the soil nearby MSW disposal site. The fungal strains were isolated in potato dextrose agar (PDA), media at temperatures 28 ± 1 °C by using standard serial dilution pour plate method, and appeared fungal colonies identified based on morphological characteristics. The overall most fungal diversity was found in soil sample collected from S5, followed by S4, S3, S1, and least in S2 site...
February 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28199201/a-critical-review-on-factors-influencing-fermentative-hydrogen-production
#4
Richa Kothari, Virendra Kumar, Vinayak V Pathak, Shamshad Ahmad, Ochieng Aoyi, V V Tyagi
Biohydrogen production by dark fermentation of different waste materials is a promising approach to produce bio-energy in terms of renewable energy exploration. This communication has reviewed various influencing factors of dark fermentation process with detailed account of determinants in biohydrogen production. It has also focused on different factors such as improved bacterial strain, reactor design, metabolic engineering and two stage processes to enhance the bioenergy productivity from substrate. The study also suggest that complete utilization of substrates for biological hydrogen production requires the concentrated research and development for efficient functioning of microorganism with integrated application for energy production and bioremediation...
March 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28196719/bacterial-community-shift-and-hydrocarbon-transformation-during-bioremediation-of-short-term-petroleum-contaminated-soil
#5
Manli Wu, Xiqiong Ye, Kaili Chen, Wei Li, Jing Yuan, Xin Jiang
A laboratory study was conducted to evaluate the impact of bioaugmentation plus biostimulation (BR, added both nutrients and bacterial consortia), and natural attenuation (NA) on hydrocarbon degradation efficiency and microflora characterization during remediation of a freshly contaminated soil. After 112 days of remediation, the initial level of total petroleum hydrocarbon (TPH) (61,000 mg/kg soil) was reduced by 4.5% and 5.0% in the NA and BR treatments, respectively. Bioremediation did not significantly enhance TPH biodegradation compared to natural attenuation...
February 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28196686/starch-enhanced-degradation-of-hmw-pahs-by-fusarium-sp-in-an-aged-polluted-soil-from-a-coal-mining-area
#6
Ou-Ya Zhao, Xue-Na Zhang, Sheng-Dong Feng, Li-Xiu Zhang, Wei Shi, Zhi-Xin Yang, Miao-Miao Chena, Xue-Dan Fanga
The present study used strain ZH-H2 (Fusarium sp.) isolated by our group as the PAH-degrading strain and 5-6-rings PAHs as degradation objects. The soil incubation experiment was carried out to investigate the starch-enhanced degradation effects of HMW PAHs by Fusarium sp. in an Aged Polluted Soil from a Coal Mining Area. The results showed that the removal rates of BaP, InP and BghiP increased with increasing inoculation rate of ZH-H2 in the unsterile aged polluted soil of coal mining area, with the exception of BbF degradation which increased in the H2 treatment and then decreased...
December 28, 2016: Chemosphere
https://www.readbyqxmd.com/read/28194672/assessment-of-the-effects-of-orally-administered-ferrous-sulfate-on-oncopeltus-fasciatus-heteroptera-lygaeidae
#7
Amparo Ferrero, Amparo Torreblanca, María Dolores Garcerá
Iron is an essential nutrient needed for multiple biological processes, but it is also an effective pro-oxidant in its reduced form. Environmental sources of iron toxic species include reduced soils from rice plantations, polluted natural areas from metal industry waste, or iron oxides used in soil bioremediation. Few studies have been conducted to assess the toxicity of iron species in insects. The present work aims to assess the oxidative stress effects of ferrous sulfate administered in drinking water after acute exposure (96 h) to adults of the insect model Oncopeltus fasciatus (Dallas)...
February 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28192727/ecotoxicological-assessments-show-sucralose-and-fluoxetine-affect-the-aquatic-plant-lemna-minor
#8
Cherisse Amy-Sagers, Keith Reinhardt, Danelle M Larson
Pharmaceuticals and personal care products (PPCP) are prevalent in aquatic systems, yet the fate and impacts on aquatic plants needs quantification for many compounds. We measured and detected sucralose (an artificial sweetener), fluoxetine (an antidepressant), and other PPCP in the Portneuf River in Idaho, USA, where Lemna minor (an aquatic plant in the environment and used in ecotoxicology studies) naturally occurs. Sucralose was hypothesized to negatively affect photosynthesis and growth of L. minor because sucralose is a chlorinated molecule that may be toxic or unusable for plant metabolism...
January 19, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28188482/isolation-of-pseudomonas-fluorescens-species-highly-resistant-to-pentachlorobenzene
#9
Itxaso Montánchez, Anna Chao Kaberdina, Elena Sevillano, Lucía Gallego, Susana Rodríguez-Couto, Vladimir R Kaberdin
Polychlorinated aromatic compounds, including pentachlorobenzenes and hexachlorobenzenes, are recalcitrant industrial pollutants that cause adverse effects on living cells. In this paper, the isolation of Pseudomonas fluorescens species with high resistance to pentachlorobenzene (PeCB) is reported. It was found that, in contrast to its slightly negative effect on P. fluorescens growth, PeCB readily inhibited the cell growth of Serratia spp. and Escherichia coli strains, thus indicating that inhibition of bacterial growth by PeCB is species-dependent...
February 10, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28188206/insight-into-the-carbon-source-dependent-inducible-veratrylalcohol-and-ferulic-acid-metabolism-in-pseudomonas-putida-csv86
#10
Karishma Mohan, Prashant S Phale
Pseudomonas putida CSV86 degrades lignin-derived metabolic intermediates viz veratrylalcohol, ferulic acid, vanillin and vanillic acid as a sole source of carbon and energy. Strain CSV86 also displayed the ability to degrade lignin sulphonate. Cell respiration, enzyme activity, biotransformation and HPLC analysis suggests that veratyralcohol and ferulic acid are metabolized to vanillic acid by two distinct carbon-source dependent inducible pathways. Vanillic acid was further metabolized to protocatechuic acid and enters the central carbon pathway viaβ-ketoadipate route after ortho ring-cleavage...
February 10, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28185099/microbial-arsenite-oxidation-with-oxygen-nitrate-or-an-electrode-as-the-sole-electron-acceptor
#11
Van Khanh Nguyen, Huong T Tran, Younghyun Park, Jaecheul Yu, Taeho Lee
The purpose of this study was to identify bacteria that can perform As(III) oxidation for environmental bioremediation. Two bacterial strains, named JHS3 and JHW3, which can autotrophically oxidize As(III)-As(V) with oxygen as an electron acceptor, were isolated from soil and water samples collected in the vicinity of an arsenic-contaminated site. According to 16S ribosomal RNA sequence analysis, both strains belong to the ɤ-Proteobacteria class and share 99% sequence identity with previously described strains...
February 9, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28181806/biodegradation-of-phenanthrene-in-polycyclic-aromatic-hydrocarbon-contaminated-wastewater-revealed-by-coupling-cultivation-dependent-and-independent-approaches
#12
Jibing Li, Chunling Luo, Mengke Song, Qing Dai, Longfei Jiang, Dayi Zhang, Gan Zhang
The indigenous microorganisms responsible for degrading phenanthrene (PHE) in polycyclic aromatic hydrocarbons (PAHs)-contaminated wastewater were identified by DNA-based stable isotope probing (DNA-SIP). In addition to the well-known PHE degraders Acinetobacter and Sphingobium, Kouleothrix and Sandaracinobacter were found, for the first time, to be directly responsible for indigenous PHE biodegradation. Additionally, a novel PHE degrader, Acinetobacter tandoii sp. LJ-5, was identified by DNA-SIP and direct cultivation...
February 9, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28178594/the-effects-of-fluoride-based-fire-fighting-foams-on-soil-microbiota-activity-and-plant-growth-during-natural-attenuation-of-perfluorinated-compounds
#13
Renato Nallin Montagnolli, Paulo Renato Matos Lopes, Jaqueline Matos Cruz, Elis Marina Turini Claro, Gabriela Mercuri Quiterio, Ederio Dino Bidoia
The use of fluoride based foams increases the effectiveness of fire-fighting operations, but they are also accompanied by major drawbacks regarding environmental safety of perfluorinated compounds (PFCs). The main concern with PFCs release is due to their well-known persistence and bioaccumulative potential, as they have been detected in many environmental samples. There is a significant knowledge gap on PFC toxicity to plants, even though such data could be useful towards bioremediation procedures. It is consensus that a realistic assessment of fire-fighting foam toxicity should cover as many test organisms as possible, however, few studies combine the performance of ecotoxicological tests with a detailed study of microbial communities in soil contaminated with firefighting foams...
January 30, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28178315/composition-and-pathogenic-potential-of-a-microbial-bioremediation-product-used-for-crude-oil-degradation
#14
Azam F Tayabali, Gordon Coleman, Jennifer Crosthwait, Kathy C Nguyen, Yan Zhang, Philip Shwed
A microbial bioremediation product (MBP) used for large-scale oil degradation was investigated for microbial constituents and possible pathogenicity. Aerobic growth on various media yielded >108 colonies mL-1. Full-length 16S rDNA sequencing and fatty acid profiling from morphologically distinct colonies revealed ≥13 distinct genera. Full-length 16S rDNA library sequencing, by either Sanger or long-read PacBio technology, suggested that up to 21% of the MBP was composed of Arcobacter. Other high abundance microbial constituents (>6%) included the genera Proteus, Enterococcus, Dysgonomonas and several genera in the order Bacteroidales...
2017: PloS One
https://www.readbyqxmd.com/read/28169492/comparison-of-biofilm-formation-and-motility-processes-in-arsenic-resistant-thiomonas-spp-strains-revealed-divergent-response-to-arsenite
#15
Julien Farasin, Sandrine Koechler, Hugo Varet, Julien Deschamps, Marie-Agnès Dillies, Caroline Proux, Mathieu Erhardt, Aline Huber, Bernd Jagla, Romain Briandet, Jean-Yves Coppée, Florence Arsène-Ploetze
Bacteria of the genus Thiomonas are found ubiquitously in arsenic contaminated waters such as acid mine drainage (AMD), where they contribute to the precipitation and the natural bioremediation of arsenic. In these environments, these bacteria have developed a large range of resistance strategies among which the capacity to form particular biofilm structures. The biofilm formation is one of the most ubiquitous adaptive response observed in prokaryotes to various stresses, such as those induced in the presence of toxic compounds...
February 7, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28168194/decolourisation-capabilities-of-ligninolytic-enzymes-produced-by-marasmius-cladophyllus-umas-ms8-on-remazol-brilliant-blue-r-and-other-azo-dyes
#16
Ngieng Ngui Sing, Ahmad Husaini, Azham Zulkharnain, Hairul Azman Roslan
Marasmius cladophyllus was examined for its ability to degradatively decolourise the recalcitrant dye Remazol Brilliant Blue R (RBBR) and screened for the production of ligninolytic enzymes using specific substrates. Monitoring dye decolourisation by the decrease in absorbance ratio of A592/A500 shows that the decolourisation of RBBR dye was associated with the dye degradation. Marasmius cladophyllus produces laccase and lignin peroxidase in glucose minimal liquid medium containing RBBR. Both enzyme activities were increased, with laccase activity recorded 70 times higher reaching up to 390 U L(-1) on day 12...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28164784/accumulation-and-tolerance-to-cadmium-heavy-metal-ions-and-induction-of-14-3-3-gene-expression-in-response-to-cadmium-exposure-in-coprinus-atramentarius
#17
Chengjian Xie, Liujie Hu, Yongzhu Yang, Dunxiu Liao, Xingyong Yang
Cadmium (Cd), one of the most toxic heavy-metal pollutants, has a strong and irreversible tendency to accumulate. Bioremediation is a promising technology to remedy and control heavy metal pollutants because of its low cost and ability to recycle heavy metals. Coprinus atramentarius is recognized as being able to accumulate heavy metal ions. In this work, C. atramentarius is cultivated on a solid medium containing Cd(2+) ions to analyze its ability to tolerate different concentrations of the heavy metal ion...
March 2017: Microbiological Research
https://www.readbyqxmd.com/read/28161562/hindrance-of-1-4-dioxane-biodegradation-in-microcosms-biostimulated-with-inducing-or-non-inducing-auxiliary-substrates
#18
Mengyan Li, Yuanyuan Liu, Ya He, Jacques Mathieu, James Hatton, William DiGuiseppi, Pedro J J Alvarez
A microcosm study was conducted to assess two biostimulation strategies (relative to natural attenuation) to bioremediate 1,4-dioxane contamination at a site in west Texas. Dioxane concentrations were relatively low (<300 μg/L), which represents a potential challenge to sustain and induce specific degraders. Thus, biostimulation was attempted with an auxiliary substrate known to induce dioxane-degrading monooxygenases (i.e., tetrahydrohyran [THF]) or with a non-inducing growth substrate (1-butanol [1-BuOH])...
January 26, 2017: Water Research
https://www.readbyqxmd.com/read/28161514/biosorption-behavior-and-proteomic-analysis-of-escherichia-coli-p4-under-cadmium-stress
#19
Zaman Khan, Abdul Rehman, Muhammad Atif Nisar, Saima Zafar, Inga Zerr
Bacteria develop a variety of adaptations at transcriptomic, metabolomic and proteomic levels in order to survive potentially damaging environmental perturbations. Present study is exploring the fluctuations in proteome of E. coli P4 to knob Cd(+2)-induced cytotoxicity. An attempt was also made to integrate all these approaches to gain comprehensive insight of Cd(+2) stress response in E. coli P4. This study is exposing the altered behavior of various proteins and their underlying metabolic pathways which have previously not been reported with reference to Cd(+2) stress such as sulfoquinovose biosynthesis and degradation pathway...
January 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/28159790/the-effects-of-sulfate-reduction-on-tce-dechlorination-by-dehalococcoides-containing-microbial-communities
#20
Xinwei Mao, Alexandra Polasko, Lisa Alvarez-Cohen
: In order to elucidate interactions between sulfate reduction and dechlorination, we systematically evaluated the effects of different concentrations of sulfate and sulfide on reductive dechlorination by isolates, constructed consortia and enrichments containing Dehalococcoides sp. Sulfate (up to 5 mM) did not inhibit growth or metabolism of pure cultures of dechlorinator Dehalococcoides mccartyi 195, sulfate reducer Desulfovibrio vulgaris Hildenborough (DvH) or syntroph Syntrophomonas wolfei (S...
February 3, 2017: Applied and Environmental Microbiology
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