scholarly journals EXPANSION OF CYTOGENETICALLY MODIFIED FORM OF OPISTHORCHIS FELINEUS IN THE TOM RIVER BASIN

2016 ◽  
pp. 65-69
Author(s):  
Nikolai Ilyinskikh ◽  
Nikolai Ilyinskikh ◽  
Ekaterina Ilyinskikh ◽  
Ekaterina Ilyinskikh
Keyword(s):  
River Basin ◽  
Industrial Wastewater ◽  
Robertsonian Fusion ◽  
Experimental Conditions ◽  
Opisthorchis Felineus ◽  
Chromosome Form ◽  
Golden Hamsters ◽  
Siberian Chemical ◽  
Chromosome Karyotype

In 1993, karyotyping of Opisthorchis felineus sporocysts, isolated from aquatic mollusks Bithynia inflat a in the industrial wastewater of the Siberian Chemical Combine discovered cytogenetically modified 12-chromosome specimens. In 2012-2013, a repeated study of the spread of these mutant trematodes in the lower course of the river Tom was carried out. It was established that specimens with sporocysts of O. felineus having 2n=12 were found in 8 of 10 places of catching. The caught goldfish were used to isolate metacercariae to infest golden hamsters in the experimental conditions. After 5 months, the hamster livers were processed to extract marita specimens and the number of chromosomes in their ovaries and testes was cytogenetically determined. The results of analysis of the spread of O. felineus carried out by this method showed the presence of 12-chromosome form of the Opisthorchis marita in all places of fishing out in the lower course of the river Tom. Analysis of the 12-chromosome karyotype allows to conclude that this mutation was a result of Robertsonian fusion of chromosomes 3 and 6 of 14-chromosome form of karyotype.

scholarly journals Treatment of High-Strength Animal Industrial Wastewater Using Photo-Assisted Fenton Oxidation Coupled to Photocatalytic Technology

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1553 ◽  
Author(s):  
Jae Hong Park ◽  
Dong Seok Shin ◽  
Jae Kwan Lee
Keyword(s):  
Light Intensity ◽  
Removal Efficiency ◽  
Industrial Wastewater ◽  
Uv Light ◽  
High Strength ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Optimal Conditions ◽  
Experimental Conditions ◽  
Animal Wastewater

Animal wastewater is one of the wastewaters that has a color and is difficult to treat because it contains a large amount of non-degradable organic materials. The photo-assisted Fenton oxidation technique was applied to treat animal wastewater, and the optimal conditions of chemical oxygen demands (COD) removal were analyzed according to changes in pH, ferrous ion, H2O2, and ultraviolet (UV) light intensity as a single experimental condition. Experimental results showed that, under the single-factor experimental conditions, the optimal conditions for degradation of animal wastewater were pH 3.5, Fe(II) 0.01 M, H2O2 0.1 M, light intensity 3.524 mW/m2. Under the optimal conditions, COD removal efficiency was 91%, sludge production was 2.5 mL from 100 mL of solution, color removal efficiency was 80%, and coliform removal efficiency was 99.5%.

Infestation of Alien Cyprinid Fishes with Trematode Opisthorchis felineus Rivolta, 1884 in the Middle Ob River Basin

2019 ◽  
Vol 10 (2) ◽  
pp. 178-180 ◽  
Author(s):  
A. V. Simakova ◽  
I. B. Babkina ◽  
N. E. Khodkevich ◽  
A. M. Babkin ◽  
E. A. Interesova
Keyword(s):  
River Basin ◽  
Opisthorchis Felineus ◽  
Ob River ◽  
Cyprinid Fishes

scholarly journals A CeO2 Semiconductor as a Photocatalytic and Photoelectrocatalytic Material for the Remediation of Pollutants in Industrial Wastewater: A Review

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1435
Author(s):  
Elzbieta Kusmierek
Keyword(s):  
Photocatalytic Activity ◽  
Industrial Wastewater ◽  
Green Technology ◽  
Experimental Conditions ◽  
Oxide Semiconductors ◽  
Composite Photocatalyst ◽  
Conduction Bands ◽  
Photoelectrocatalytic Degradation ◽  
Valence Bands ◽  
Photocatalytic Reactions

The direct discharge of industrial wastewater into the environment results in serious contamination. Photocatalytic treatment with the application of sunlight and its enhancement by coupling with electrocatalytic degradation offers an inexpensive and green technology enabling the total removal of refractory pollutants such as surfactants, pharmaceuticals, pesticides, textile dyes, and heavy metals, from industrial wastewater. Among metal oxide—semiconductors, cerium dioxide (CeO2) is one of the photocatalysts most commonly applied in pollutant degradation. CeO2 exhibits promising photocatalytic activity. Nonetheless, the position of conduction bands (CB) and valence bands (VB) in CeO2 limits its application as an efficient photocatalyst utilizing solar energy. Its photocatalytic activity in wastewater treatment can be improved by various modification techniques, including changes in morphology, doping with metal cation dopants and non-metal dopants, coupling with other semiconductors, and combining it with carbon supporting materials. This paper presents a general overview of CeO2 application as a single or composite photocatalyst in the treatment of various pollutants. The photocatalytic characteristics of CeO2 and its composites are described. The main photocatalytic reactions with the participation of CeO2 under UV and VIS irradiation are presented. This review summarizes the existing knowledge, with a particular focus on the main experimental conditions employed in the photocatalytic and photoelectrocatalytic degradation of various pollutants with the application of CeO2 as a single and composite photocatalyst.

Catalytic ozonation for odour removal of high temperature alumina refinery condensate

2012 ◽  
Vol 66 (8) ◽  
pp. 1781-1786 ◽  
Author(s):  
Xinguang Wang ◽  
Jing Guan ◽  
Richard M. Stuetz
Keyword(s):  
Industrial Wastewater ◽  
Industrial Process ◽  
Catalytic Ozonation ◽  
Ozone Treatment ◽  
Experimental Conditions ◽  
Before And After ◽  
Removal Efficiencies ◽  
Odour Emissions ◽  
Odour Removal ◽  
Dynamic Olfactometry

Odour emissions from aluminium processing can cause an impact on local communities surrounding such facilities. Of particular concern is fugitive odours emitted from the handling and use of refinery condensate streams, particularly the digestion condensate. This study evaluated the application of using catalytic ozonation to treat alumina refinery condensate in order to remove the potential emission of odourous compounds from the industrial wastewater. The technical challenges in treating the alumina refinery condensate are the high pH and temperatures of the wastewater effluent (over 80 °C and pH above 10) due the industrial process. The odour removal efficiencies for different catalysts (FeCl3, MnO, and MnSO4) under experimental conditions in terms of controlled pH, temperature and ozone dosage were determined before and after ozone treatment using dynamic olfactometry. The result demonstrated that the addition of both FeCl3 and MnO catalysts improved odour removal efficiencies during the ozonation of alumina condensates at similar pH and temperature conditions. FeCl3 and MnO had similar enhancement for odour removal, however MnO was determined to be more appropriate than MnSO4 for odour removal due to the colouration of the treated condensate.

scholarly journals Schiff Base Anchored with Silver Nanoparticles as Effective Adsorbent for Removal of Cadmium(II) Heavy Metal from Industrial Wastewater

2020 ◽  
Vol 32 (8) ◽  
pp. 1941-1946
Author(s):  
Preeti Sharma ◽  
Vedula Uma
Keyword(s):  
Silver Nanoparticles ◽  
Schiff Base ◽  
Contact Time ◽  
Industrial Wastewater ◽  
Metal Ion ◽  
Solid Phase ◽  
Chemical Reduction ◽  
Ion Concentration ◽  
Spectral Studies ◽  
Experimental Conditions

The current study deals with the examination of the capacity of Schiff base anchored with silver nanoparticles for removal of cadmium(II) ions from industrial wastewater. Schiff base was synthesized using refluxing of salicylaldehyde and 4-aminoantipyrine in alcoholic medium. The characterization of Schiff base were studied by elemental analysis, FTIR, NMR, UV-visible and mass spectral studies. The silver nanoparticles were synthesized using the chemical reduction method and characterized. Then, silver nanoparticles anchored to the Schiff base by suitable method and again characterized. Peanut shells were used as solid phase for removal of Cd(II) ions. The effects of several parameters to optimize the adsorption of Cd(II) ions on solid phase, including pH, contact time, initial metal ion concentration and adsorbent weight were investigated. The maximum removal efficiency of Cd(II) ions on solid phase using Ag nano@Schiff base was achieved under experimental conditions of pH 6 (% removal = 81%), contact time of 15 min (% removal = 93%), initial metal ion concentration of 0.5 ppm (% removal = 95%) and adsorbent weight of 3 mg (% removal = 89%). The results showed that extraction of Cd2+ on AgNPs@Schiff base follows Freundlich adsorption isotherm.

scholarly journals Pollutant sources investigation and remedial strategies development for the Kaoping River Basin, Taiwan

2003 ◽  
Vol 48 (7) ◽  
pp. 97-103 ◽  
Author(s):  
C.M. Kao ◽  
F.C. Wu ◽  
K.F. Chen ◽  
T.F. Lin ◽  
Y.E. Yen ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
River Basin ◽  
Best Management Practices ◽  
Industrial Wastewater ◽  
Overland Flow ◽  
Geographical Information ◽  
Quality Analysis ◽  
Pollutant Sources ◽  
Remedial Strategies

The Kaoping River Basin, located in southern Taiwan, flows through approximately 171 km and drains towards the South Taiwan Strait. It is the largest and the most intensively used river basin in Taiwan. Based on the results from the pollutant sources investigation and water quality analysis, the main water pollution sources of the Kaoping River were livestock wastewater from hog farms, municipal wastewater, industrial wastewater, leachate from riverbank landfills, and non-point source (NPS) pollutants from agricultural areas in the upper catchment. Concern about the deteriorating condition of the river led the Government of Taiwan to amend the relevant legislation and strengthen the enforcement of the discharge regulations to effectively manage the river and control the pollution. The following remedial strategies have been taken to improve the river water quality since 2001: (1) hog ban in the upper catchment of the Kaoping River Basin, thus, 510 thousand hogs have been removed/relocated; (2) removal of riverbank landfills; (3) enforcement of the industrial wastewater discharge standards; (4) sewer system construction in five cities along the river corridor; (5) application of best management practices for NPS pollutant control; (6) application of natural wastewater treatment systems (e.g. land treatment, constructed wetland, overland flow, riverbank sedimentation/aeration pond) for domestic wastewater treatment in rural areas; and (7) construction of the watershed geographical information system (GIS) and real time water quality monitoring system to effectively monitor and manage the watershed. Recent water quality investigation results indicate that the biochemical oxygen demand (BOD) and nutrient loadings to the Kaoping River have been significantly reduced and the water quality has been improved after the implementation of the remedial strategies described above. Results and experience obtained from this study will be helpful in designing the watershed management strategies for other similar river basins.

scholarly journals Facile Preparation of Charcoal Nanomaterial from Fishery Waste with Remarkable Adsorption Ability

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1318 ◽  
Author(s):  
Yaning Wang ◽  
Yarui Zhou ◽  
Lu Cai ◽  
Jian Guo ◽  
Yong Xu ◽  
...  
Keyword(s):  
Industrial Wastewater ◽  
Total Pore Volume ◽  
Oily Wastewater ◽  
Adsorption Model ◽  
Adsorption Ability ◽  
Experimental Conditions ◽  
Langmuir Adsorption ◽  
Emulsified Oil ◽  
Pseudo Second Order ◽  
Activating Agent

In this study, modified activated fishbone charcoal (MAFC) was successfully prepared to remove emulsified oil from oily wastewater. Various characteristic techniques, including SEM, XRD, FTIR, and BET, were employed to investigate the morphology, texture, and surface properties of as-prepared samples. BET results demonstrated that the specific surface area of fishbone charcoal increased from 69.8 m2/g to 206.0 m2/g after treatment with K2CO3 as an activating agent, while the total pore volume of MAFC increased from 0.003 cm3/g to 0.3 cm3/g, accompanied by the formation of abundant pore structures. It was observed that 90.1% of emulsified oil (100 mg/L) was successfully removed by MAFC under our experimental conditions. The results of a kinetic and isotherm model analysis indicated that the adsorption experimental data were not only consistent with the Langmuir adsorption isotherm but were also well-described by the pseudo-second-order adsorption model. It is expected that this highly efficient and inexpensive MAFC can be a promising bio-adsorbent for removing organic pollutants from industrial wastewater.

New Insight Into The Spatial Autoregressive Model of Industrial Wastewater Discharge In The Yellow River Basin

2021 ◽  
Author(s):  
Libo Xia ◽  
Zhiliang Wang ◽  
Shuang Du ◽  
Decun Tian ◽  
Feng Chen
Keyword(s):  
Economic Development ◽  
River Basin ◽  
Industrial Wastewater ◽  
Yellow River ◽  
Yellow River Basin ◽  
Pollutant Emissions ◽  
The Yellow River ◽  
Wastewater Discharge ◽  
Spatial Autoregressive ◽  
The Yellow River Basin

Abstract This article has carried out a statistical analysis of the industrial wastewater discharge (IWD) and gross regional product (GRP) of 79 cities in the Yellow River Basin from 2003 to 2019. By calculating the Moran index of IWD and GRP, the study has found that a certain spatial autoregressive in space. There is an environmental Kuznets curve (EKC) between the environmental pollution and economic development of cities in the Yellow River Basin, and a spatial autoregressive is modelled by a set of random effects that are assigned a conditional autoregressive prior distribution. In the Bayesian environment, Markov chain Monte Carlo (MCMC) is used for inferencing, and the spatial weight matrix is ​​selected to be U-shaped matrix, and the error of the model is minimized. The parameter posterior distribution results of the model showed that the GRP did not show a significant decline. The modified EKC showed that the discharge of industrial wastewater in the entire Yellow River Basin will be reduced. Generally, cities with high pollutant emissions should learn from other cities to reduce emissions, and cities with low GRP need to increase local economic development.

CWPO of 4-CP and industrial wastewater with Al–Fe pillared clays

2010 ◽  
Vol 61 (8) ◽  
pp. 2161-2168 ◽  
Author(s):  
C. B. Molina ◽  
J. A. Zazo ◽  
J. A. Casas ◽  
J. J. Rodriguez
Keyword(s):  
Catalytic Activity ◽  
Industrial Wastewater ◽  
Active Phase ◽  
Pillared Clays ◽  
Stoichiometric Ratio ◽  
Experimental Conditions ◽  
Compound A ◽  
Wet Peroxide Oxidation ◽  
Lower Temperature ◽  
Pillaring Solution

Catalysts based on pillared clays with Al–Fe have been synthesised from a commercial bentonite and tested for catalytic wet peroxide oxidation (CWPO) of aqueous 4-Chlorophenol (4-CP) solution and industrial wastewater from cosmetics manufacture. The effect of the synthesis procedure, the iron load and reaction temperature on the catalytic activity was studied using 4-CP as target compound. A lower temperature in the preparation of the pillaring solution, as well as a higher Fe load, gave rise to a higher catalytic activity, but also a higher leaching of the active phase. The best catalyst, in terms of catalytic activity, was also tested for treating cosmetic wastewater by CWPO. Experiments were carried out at 90°C and atmospheric pressure and the influence of Fe load, catalyst concentration and H2O2/COD ratio (between 0.5 and 2 times the stoichiometric ratio) were analysed. Higher values of these parameters favour COD reduction. The Fe leaching in all cases was lower than 1.2 mg/L, indicating that these catalysts have a high stability under these experimental conditions.

Sign in / Sign up

Export Citation Format

Share Document