Capillary electrophoretic separation of humic substances using hydroxyethyl cellulose as a buffer additive and its application to characterization of humic substances in a river water sample

2008 ◽  
Vol 393 (2) ◽  
pp. 761-766 ◽  
Author(s):  
Toru Takahashi ◽  
Jun Kawana ◽  
Hitoshi Hoshino
Keyword(s):  
Water Sample ◽  
Humic Substances ◽  
River Water ◽  
Hydroxyethyl Cellulose ◽  
Electrophoretic Separation ◽  
River Water Sample ◽  
Capillary Electrophoretic

scholarly journals Characterization of a rare species of Neurospora isolated from a river water sample in China

2015 ◽  
Vol 67 (2) ◽  
pp. 685-693 ◽  
Author(s):  
Xia Yang ◽  
Siliang Huang ◽  
Yubian Zhang ◽  
Xiaoqiang Zhang
Keyword(s):  
Water Sample ◽  
River Water ◽  
Growth Rates ◽  
Rare Species ◽  
Vegetative Growth ◽  
Carbon Sources ◽  
Morphological Characteristics ◽  
Nitrogen Sources ◽  
Fungal Species ◽  
River Water Sample

A fungal isolate (ZZS4408) was obtained from a river water sample in Henan, China, and identified as a member of Neurospora brevispora, a rare species of Neurospora based on its morphological characteristics and ribosomal DNA internal transcribed spacer (rDNA-ITS) sequence. The temperatures suitable for growth of the isolate were 28-37?C with 31?C as the optimum. The growth rates of hyphal tips were 19.1-42.5 (av. 31.9) ?m min-1 at 32?C. The pH suitable for vegetative growth ranged from 5 to 7, with pH 5.5 as the optimum. The heterodisaccharides (sucrose and lactose) and D-alanine were found to be most favorable for vegetative growth of the isolate, as carbon and nitrogen sources, respectively. The vegetative growth of the isolate was more significantly influenced by nitrogen sources compared to carbon sources. N. brevispora could be considered a desirable fungal species for morphodifferentiation studies due to its rapid growth rates under favorable conditions.

Effect-directed analysis (EDA) of Danube River water sample receiving untreated municipal wastewater from Novi Sad, Serbia

2018 ◽  
Vol 624 ◽  
pp. 1072-1081 ◽  
Author(s):  
Muhammad Arslan Kamal Hashmi ◽  
Beate I. Escher ◽  
Martin Krauss ◽  
Ivana Teodorovic ◽  
Werner Brack
Keyword(s):  
Water Sample ◽  
River Water ◽  
Municipal Wastewater ◽  
Danube River ◽  
River Water Sample ◽  
Novi Sad ◽  
Effect Directed Analysis

DETERMINATION OF TRACE ELEMENTS IN RIVER WATER SAMPLE BY PIXE

2000 ◽  
Vol 10 (01n02) ◽  
pp. 57-62 ◽  
Author(s):  
M. Tsuji ◽  
K. Kawasaki ◽  
T. Niizeki ◽  
M. Saitou ◽  
T. Hattori
Keyword(s):  
Water Sample ◽  
River Water ◽  
Detection Efficiency ◽  
River Water Sample ◽  
X Ray ◽  
Concentration Method ◽  
Certified Value ◽  
Tokyo Institute ◽  
Institute Of Technology ◽  
Good Agreement

Transition metal elements and others in river water sample supplied by The Japan Society for Analytical Chemistry (JSAC) were determined by PIXE using 2.5 MeV proton beam at the Tokyo Institute of Technology Van de Graaff Laboratory. The relative detection efficiency for each X-ray of element and its recovery were studied in two methods: "Drop and Dry" and "Concentration" methods. Ten elements ( V , Cr , Mn , Fe , Ni , Cu , Zn , As , Se and Pb ) were determined, being in good agreement with the values certified by JSAC except for Mn . Intensity of K α X-ray of As and L α, X-ray of Pb nearly close to each other could be successfully evaluated using isolated L β X-ray of Pb . Mn was insufficiently recovered to give lower content than the certified value in the present conditions. V that is not listed in the certificate was found to show good agreement with that reported previously. Concentration method using sodium dibenzyldithiocarbamate only could be successfully employed for collecting these elements.

scholarly journals Remediation of Kalyani River water using plant-bacterial cell synergism

2021 ◽  
Author(s):  
Sultan Abdulkadir ◽  
Monika Chhimwal ◽  
Rajeev Kumar Srivastava
Keyword(s):  
Water Sample ◽  
River Water ◽  
Bacterial Cell ◽  
Pollutant Removal ◽  
Bacterial Cells ◽  
High Concentration ◽  
River Water Sample ◽  
Polluted River ◽  
Epipremnum Aureum ◽  
Enhanced Remediation

Abstract The purpose of this research was to evaluate the potential of plant-immobilized bacterial cells synergism for enhanced remediation of polluted river water. The polluted river water sample was collected from Kalyani river, Uttarakhand, India and characterized by high concentration of COD (1010 mg/l), BOD (230 mg/l), NO3−-N (30 mg/l), PO43−-P (48.9 mg/l), and Pb(1.028 mg/l). This water sample was treated on a lab scale with immobilized bacterial cells and Epipremnum aureum in various treatment setups. The treatment system 3 using a combination of immobilized bacterial cells and Epipremnum aureum had the highest pollutant removal efficiency of all the treatment setups tested. At 96 hours, the total COD, BOD, NO3−-N, PO43−-P and Pb contents of polluted river water sample were reduced to 60 mg/l, 20 mg/l, 2.4 mg/l, 11.7 mg/l, and 0.065 mg/l, respectively. Based on the findings, it is possible to conclude that utilizing plant-immobilized bacterial cell synergism is an environmentally friendly and cost-effective approach for enhanced remediation and rejuvenation of polluted river water. Furthermore, a field-scale application of plant-immobilized bacterial cell synergism via floating wetland construction for on-site treatment of contaminated water on the Kalyani river is recommended.

Influence of methylheptenone and related phytoplankton norcarotenoids on heterotrophic aquatic bacteria

1981 ◽  
Vol 27 (1) ◽  
pp. 144-147 ◽  
Author(s):  
W. Reichardt
Keyword(s):  
Water Sample ◽  
Glucose Uptake ◽  
River Water ◽  
Heterotrophic Bacteria ◽  
Aquatic Bacteria ◽  
River Water Sample ◽  
Bacterial Cultures ◽  
Metabolic Functions ◽  
Noncompetitive Inhibitor ◽  
Cyanobacteria And Algae

Certain norcarotenoids, which have recently been found as excretion products of freshwater cyanobacteria and algae, are potent inhibitors of different metabolic functions in heterotrophic bacteria. 6-Methylhept-5-en-2-one showed the strongest effects and acted as a noncompetitive inhibitor of both glucose uptake and respiration by aquatic isolates of Chromobacterium lividum and Arthrobacter sp. Inhibition of the heterotrophic potential of glucose uptake by 6-methylhept-5-en-2-one was characterized by considerably lower inhibitor constants for bacterial cultures (Ki = 0.4 and 1.6 μM) than for a river water sample (Ki = 186.0 μM).

scholarly journals Woody plant willow in function of river water protection

2011 ◽  
Vol 65 (4) ◽  
pp. 397-401 ◽  
Author(s):  
Ljiljana Babincev ◽  
Ljubinka Rajakovic ◽  
Milana Budimir ◽  
Aleksandra Peric-Grujic ◽  
Dragana Sejmanovic
Keyword(s):  
Heavy Metals ◽  
Water Sample ◽  
River Water ◽  
Industrial Complex ◽  
River Water Sample ◽  
The North ◽  
Waste Dumps ◽  
Individual Solution ◽  
Removal Of Heavy Metals ◽  
White Willow

Coastal area surrounding the river Ibar, in the area between cities of Kosovska Mitrovica and Leposavic in the north of Kosovo and Metohija, is occupied with seven industrial waste dumps. These dumps were all part of the exploitation and flotation refinement of raw mineral materials, metallurgic refinement of concentrates, chemical industry, industrial refinement and energetic facilities of Trepca industrial complex. The existing waste dumps, both active and inactive, are of heterogenic chemical composition. Its impact on the river water is shown by the content of heavy metals found in it. Removal of lead, cadmium and zinc would be economically unrewarding, regardless of the technology used. Wooden plant that prevails in this area is white willow. This work is focused on the removal of heavy metals (Pb, Cd and Zn) from the water of the river Ibar using white willow. Roots of the willow are cultivated using the method of water cultures in an individual solution of heavy metals and river water sample. The preparation of the samples for analysis was performed by burning the herbal material and dissolving ashes in the appropriate acids. The concentrations of metals were determined by the stripping analysis. In the investigated heavy metal solutions the biomass increase is 25.6% in lead solution, 27.3% in cadmium and 30.7% in zinc solution. The increase of biomass in nutritional solution, without the heavy metals, is 32.4% and in river water sample 27.5%. The coefficient of bioaccumulation in solutions with heavy metals is 1.6% in lead solution, 1.9% in cadmium and 2.2% in zinc solution. Heavy metals accumulation is 18.74 ?g of lead, 20.09 ?g of cadmium and 22.89 ?g of zinc. The coefficient of bioaccumulation of the water samples, that contained 44.83 ?g/dm3 of lead, 29.21 ?g/dm3 of cadmium and 434.00 ?g/dm3 of zinc, during the period of 45 days, was 30.3% for lead, 53.4% for cadmium and 3.9% for zinc. The concentrations of accumulated metals from the river water are 19.01 ?g of lead, 21.85 ?g of cadmium and 23.96 ?g of zinc in grams dry matter. The obtained results indicate that the willow can contribute to the decontamination of moderately contaminated river water from Pb, Cd and Zn.

Sign in / Sign up

Export Citation Format

Share Document