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Heavy metal screen tests

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https://www.readbyqxmd.com/read/29454247/tolerance-and-growth-kinetics-of-bacteria-isolated-from-gold-and-gemstone-mining-sites-in-response-to-heavy-metal-concentrations
#1
Oluwatosin Gbemisola Oladipo, Obinna Tobechukwu Ezeokoli, Mark Steve Maboeta, Jacobus Johannes Bezuidenhout, Louwrens R Tiedt, Anine Jordaan, Cornelius Carlos Bezuidenhout
Response and growth kinetics of microbes in contaminated medium are useful indices for the screening and selection of tolerant species for eco-friendly bio-augmentative remediation of polluted environments. In this study, the heavy metal (HM) tolerance, bioaccumulation and growth kinetics of seven bacterial strains isolated from mining sites to 10 HMs (Cd, Hg, Ni, Al, Cr, Pb, Cu, Fe, Mn and Zn) at varied concentrations (25-600 mgL -1 ) were investigated. The isolates were phylogenetically (16S rRNA gene) related to Lysinibacillus macroides, Achromobacter spanius, Bacillus kochii, B...
February 14, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29438949/biosorption-of-heavy-metals-by-obligate-halophilic-fungi
#2
Amna Bano, Javaid Hussain, Ali Akbar, Khalid Mehmood, Muhammad Anwar, Muhammad Sharif Hasni, Sami Ullah, Sumbal Sajid, Imran Ali
The presence of heavy metals in the environment poses a serious threat to human health. Remediation of this problem using microorganisms has been widely researched to find a sustainable solution. Obligate halophilic fungi comprising Aspergillus flavus, Aspergillus gracilis, Aspergillus penicillioides (sp. 1), Aspergillus penicillioides (sp. 2), Aspergillus restrictus and Sterigmatomyces halophilus were used for the biosorption of cadmium, copper, ferrous, manganese, lead and zinc. The metals were supplemented as salts in potato dextrose broth for the growth of obligate halophilic fungi and incubated for 14 days...
February 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29408076/elimination-of-micropollutants-by-activated-carbon-produced-from-fibers-taken-from-wastewater-screenings-using-hydrothermal-carbonization
#3
F Benstoem, G Becker, J Firk, M Kaless, D Wuest, J Pinnekamp, A Kruse
Activated Carbon (AC) can be used to reduce organic micropollutants (OMPs) in wastewater treatment plants (WWTPs). While producing ACs conventionally still damages the environment, this can be reduced by using renewable raw material from waste streams und producing AC locally. In this study, fibers (toilet paper) were separated out of wastewater by screening WWTP influents in full scale and then used as a no-cost, carbon-rich and heavy metal-poor raw material to produce ACs. Pretreatment was hydrothermal carbonization (HTC)...
January 31, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29393504/taxonomy-characterization-and-plumbum-bioremediation-of-novel-fungi
#4
Zhenyuan Zhu, Qiaoying Song, Fengying Dong
The objective of this study was to investigate the screening, taxonomy characterization, Pb biosorption, and application of the high Pb-resistant fungus F1 separated from the heavy metal contaminated soil. Fungus F1 was screened through metal concentration gradient ranging from 25 to 4000 mg L-1 . The internal transcribed spacers (ITS) of the strain was analyzed by molecular biotechnology. The adsorption conditions were also evaluated. The precipitation of fungus F1 was analyzed by Scanning Electron Microscopy (SEM), Fourier transformer infrared spectroscopy (FTIR) and energy dispersive X-ray (EDX) techniques...
February 2, 2018: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29380042/evaluation-of-pterin-a-promising-drug-candidate-from-cyanide-degrading-bacteria
#5
Ramasamy Mahendran, Murugesan Thandeeswaran, Gopikrishnan Kiran, Mani Arulkumar, K A Ayub Nawaz, Jayamanoharan Jabastin, Balraj Janani, Thomas Anto Thomas, Jayaraman Angayarkanni
Pterin is a member of the compounds known as pteridines. They have the same nucleus of 2-amino-4-hydroxypteridine (pterin); however, the side-chain is different at the position 6, and the state of oxidation of the ring may exist in different form viz. tetrahydro, dihydro, or a fully oxidized form. In the present study, the microorganisms able to utilize cyanide, and heavy metals have been tested for the efficient production of pterin compound. The soil samples contaminated with cyanide and heavy metals were collected from Salem steel industries, Tamil Nadu, India...
January 29, 2018: Current Microbiology
https://www.readbyqxmd.com/read/29289290/toxicities-and-risk-assessment-of-heavy-metals-in-sediments-of-taihu-lake-china-based-on-sediment-quality-guidelines
#6
Yanfeng Zhang, Yuwei Han, Jinxi Yang, Lingyan Zhu, Wenjue Zhong
The occurrence, toxicities, and ecological risks of five heavy metals (Pb, Cu, Cd, Zn and Ni) in the sediment of Taihu Lake were investigated in this study. To evaluate the toxicities caused by the heavy metals, the toxicities induced by organic contaminants and ammonia in the sediments were screened out with activated carbon and zeolite. The toxicities of heavy metals in sediments were tested with benthic invertebrates (tubificid and chironomid). The correlations between toxicity of sediment and the sediment quality guidelines (SQGs) derived previously were evaluated...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29236077/a-pilot-study-of-children-s-blood-lead-levels-in-mount-isa-queensland
#7
Donna Green, Marianne Sullivan, Nathan Cooper, Annika Dean, Cielo Marquez
Mount Isa, Queensland, is one of three Australian cities with significant lead emissions due to nonferrous mining and smelting. Unlike the two other cities with lead mines or smelters, Mount Isa currently has no system of annual, systematic, community-wide blood lead level testing; and testing rates among Indigenous children are low. In previous screenings, this group of children has been shown to have higher average blood lead levels than non-Indigenous children. The first aim of this study was to assess whether parents and children would participate in less invasive, rapid point-of-care capillary testing...
December 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29150881/genotoxicity-of-11-heavy-metals-detected-as-food-contaminants-in-two-human-cell-lines
#8
B Kopp, D Zalko, M Audebert
Heavy metals, such as arsenic (As), antimony (Sb), barium (Ba), cadmium (Cd), cobalt (Co), germanium (Ge), lead (Pb), nickel (Ni), tellurium (Te), and vanadium (V) are widely distributed in the environment and in the food chain. Human exposure to heavy metals through water and food has been reported by different international agencies. Although some of these heavy metals are essential elements for human growth and development, they may also be toxic at low concentrations due to indirect mechanisms. In this study, the genotoxic and cytotoxic properties of 15 different oxidation statuses of 11 different heavy metals were investigated using high-throughput screening (γH2AX assay) in two human cell lines (HepG2 and LS-174T) representative of target organs (liver and colon) for food contaminants...
November 18, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/29127817/heavy-metals-detection-using-biosensor-cells-of-a-novel-marine-luminescent-bacterium-vibrio-sp-mm1-isolated-from-the-caspian-sea
#9
Mojtaba Mohseni, Jaber Abbaszadeh, Shima-Sadat Maghool, Mohammad-Javad Chaichi
Monitoring and assessing toxic materials which are being released into the environment along with wastewater is a growing concern in many industries. The current research describes a highly sensitive and rapid method for the detection of toxic concentrations of heavy metals in aquatic environments. Water samples were collected from southern coasts of the Caspian Sea followed by screening of luminescent bacteria. Phylogenetic analysis, including gene sequence of 16S rRNA, and biochemical tests were performed for identification of the isolate...
November 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29059628/co-selection-of-antibiotic-resistance-via-copper-shock-loading-on-bacteria-from-a-drinking-water-bio-filter
#10
Menglu Zhang, Lihua Chen, Chengsong Ye, Xin Yu
Heavy metal contamination of source water frequently occurred in developing countries as a result of accidents. To address the problems, most of the previous studies have focused on engineering countermeasures. In this study, we investigated the effects of heavy metals, particularly copper, on the development of antibiotic resistance by establishing a copper shock loading test. Results revealed that co-selection occurred rapidly within 6 h. Copper, at the levels of 10 and 100 mg/L, significantly increased bacterial resistance to the antibiotics tested, including rifampin, erythromycin, kanamycin, and a few others...
October 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28940054/framework-for-assessment-and-phytoremediation-of-asbestos-contaminated-sites
#11
Cédric Gonneau, Kinsey Miller, Sanjay K Mohanty, Rengyi Xu, Wei-Ting Hwang, Jane K Willenbring, Brenda B Casper
We examine the feasibility of phytoremediation as an alternative strategy to limit the exposure of asbestos in site with asbestos-containing materials. We collected soils from four locations from two sites-one with naturally occurring asbestos, and another, a superfund site, where asbestos-containing materials were disposed over decades-and performed ecotoxicology tests. We also performed two experiments with crop cultivar and two grasses from serpentine ecotype and cultivar to determined best choice for phytoremediation...
September 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28836031/a-field-screening-test-for-the-assessment-of-concentrations-and-mobility-of-potentially-toxic-elements-in-soils-a-case-study-on-urban-soils-from-rome-and-novi-sad
#12
Maria Rita Montereali, Valentina Pinto, Francesca Schiavella, Giovanna Armiento, Massimo Angelone, Cinzia Crovato, Maja Manojlović, Ranko Čabilovski, Carlo Cremisini
The increasing demand for environmental pollution control results in the development and use of new procedures for the determination of dangerous chemicals. Simple screening methods, which can be used directly in the field for a preliminary assessment of soil contamination, seem to be extremely advantageous. In our laboratory, we developed and optimized a rapid test for a preliminary evaluation of both the concentration and the mobility of some potentially toxic metals in soils. This screening test consists of a single extraction of the soil sample with a buffer solution, followed by the titration of the extracted solution with dithizone to determine the contents of bi-valent heavy metals (such as Pb, Cu, Zn, and Cd)...
August 23, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28812956/toxicity-identification-and-evaluation-for-the-effluent-from-a-nonmetallic-mineral-mining-facility-in-korea-using-d-magna
#13
Sungjong Lee, Hongjoo Ha, JinKyung Hong, Guyoung Kang, Chunsang Hong
Industrial wastewater has attracted increasing attention in recent years because of its impact on ecosystems and human health. Whole-effluent tests are generally used to monitor toxicities of unknown chemicals and conventional pollutants from industrial effluent discharges. This study described identification evaluation (TIE) procedures to determine the acute toxicity of a nonmetallic mineral mining facility effluent that was toxic to Daphnia magna. In the characterization step (TIE phase I), toxic effects of heavy metals, organic compounds, oxidants, volatile organic compounds, suspended solids, and ammonia were screened...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28802093/clinical-aspects-of-opium-adulterated-with-lead-in-iran-a-review
#14
REVIEW
Samira Alinejad, Jan Aaseth, Mohammad Abdollahi, Hossein Hassanian-Moghaddam, Omid Mehrpour
Adulteration of drugs with poisonous substances during production or consumption has caused numerous health problems. Among contaminants that have the potential of producing poisonous effects are the heavy metals lead, arsenic and thallium that make up an important group of toxic substances. The emergence of these new health problems related to opioid abuse has precipitated this MiniReview on the status of the most hazardous and common opioid adulterants. In fact, adulterated opium is a major public health problem and can threaten the health of users...
August 12, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28759788/isolation-of-vanadium-resistance-endophytic-bacterium-pre01-from-pteris-vittata-in-stone-coal-smelting-district-and-characterization-for-potential-use-in-phytoremediation
#15
Liang Wang, Hai Lin, Yingbo Dong, Yinhai He, Chenjing Liu
This study investigates the V-resistant endophytic bacteria isolated from V-accumulator Pteris vittata grown on stone coal smelting district. Among all the ten isolates, the strain PRE01 identified as Serratia marcescens ss marcescens by Biolog GEN III MicroPlate™ was screened out by ranking first in terms of heavy metal resistance and plant growth promoting traits. The S. marcescens PRE01 had strong V, Cr and Cd resistance especially for V up to 1500mg/L. In addition, it exhibited ACC deaminase activity, siderophore production and high indoleacetic acid production (60...
July 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28699782/bacterial-siderophores-promote-plant-growth-screening-of-catechol-and-hydroxamate-siderophores
#16
Anna Grobelak, Joanna Hiller
The aim of the study was to determine the quality and quantity of siderophores produced by bacteria isolated from plants' roots. The second aim was to determine the effect of siderophores on plants growth (Festuca rubra L. and Brassica napus L.). The study was carried out using bacteria isolated from roots of: Arabidopsis thaliana L., F. rubra, and Agrostis capillaris L., growing on the heavy metals contaminated area. The chrome azurol sulfonate (CAS) test, Arnow's test for catechol siderophores, and Csaksy's test for hydroxamate siderophores were performed...
September 2, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28511314/-determination-of-cadmium-in-human-urine-by-colloidal-gold-immunochromatographic-assay
#17
G Y Fu, J Gong, X X Leng
Objective: To establish the method of colloidal gold immunochrom atographic assay for detecting cadmium ions rapidly. Methods: The anti-cadmium ion monoclonal antibody-gold conjugate was labeled on the binding pad, cadmium ion hapten and goat anti-mouse IgG were coated on nitrocellulose membrane as the detection line (T line) and quality control line (C line) respectively. The sample pad, colloidal gold bonding pad, nitrocellulose membrane and absorption pad were orderly assembled on the PVC board to cut into a test paper strip...
March 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28330266/biosorption-of-lead-copper-and-cadmium-using-the-extracellular-polysaccharides-eps-of-bacillus-sp-from-solar-salterns
#18
Syed Shameer
Extracellular Polysaccharides (EPS) from both prokaryotes and eukaryotes have a great deal of research interest as they protect the producer from different stresses including antibiotics, ionic stress, desiccation and assist in bio-film formation, pathogenesis, adhesion, etc. In this study haloalkaliphilic Bacillus sp., known to cope with osmophilic stress, was selected and screened for EPS production. The EPS were isolated, partially purified and chemical characteristics were documented using liquid FT-IR followed by assessment of heavy metal biosorption (lead, copper and cadmium) using Atomic Absorption Spectroscopy (AAS)...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28050770/managing-dredged-material-in-the-coastal-zone-of-the-baltic-sea
#19
Marta Staniszewska, Helena Boniecka
This article deals with the legal and practical recommendations for the management of dredged material in the riparian countries of the Baltic Sea. The recommendations are contained in three conventions: LC, 2000. London Convention (1972), Convention on the Protection of the Marine Environment of the Baltic Sea area (Helsinki Convention) (1992), the OSPAR Convention (1972). Different approaches to evaluating the contamination level of dredge spoils, used by the Baltic Sea riparian countries, have been characterized...
January 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27832436/screening-of-heavy-metal-containing-waste-types-for-use-as-raw-material-in-arctic-clay-based-bricks
#20
Louise Josefine Belmonte, Lisbeth M Ottosen, Gunvor Marie Kirkelund, Pernille Erland Jensen, Andreas Peter Vestbø
In the vulnerable Arctic environment, the impact of especially hazardous wastes can have severe consequences and the reduction and safe handling of these waste types are therefore an important issue. In this study, two groups of heavy metal containing particulate waste materials, municipal solid waste incineration (MSWI) fly and bottom ashes and mine tailings (i.e., residues from the mineral resource industry) from Greenland were screened in order to determine their suitability as secondary resources in clay-based brick production...
November 10, 2016: Environmental Science and Pollution Research International
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