Electrical method for a water control after an osmosis process for the standard unit of ultrasound power in the aquatic environment

This study was conducted to determine the effect of industrial effluents on seed germination and seedling growth of some leafy vegetables under pot culture condition. Waste water sample was collected from natural gas fertilizer factory Limited, Fenchuganj, Sylhet. Four different leafy vegetables were selected as test crop to grow using these effluents. The design of the experiment was randomized complete block. The effects of different concentration of effluent were compared to that of distilled water (control). The results revealed that different concentrations of the extract caused significant inhibitory effect on germination and root elongation but benefited the shoot elongation. Maximum reduction in germination and root length was observed with the increase in effluent concentration, but increasing the shoot length. Bioassays indicated that the effects were proportional to the concentrations of the effluents and higher concentration showed stronger effect. Different physicochemical parameters of water e.g. pH, temperature, conductivity, dissolved oxygen (DO), chemical oxygen demand (COD), turbidity, Total dissolve solids (TSS), total suspended solids (TSS) etc. of the sample was also analyzed. It was found that the values were far apart from the optimum values that require for safe aquatic environment to establish an aquatic ecosystem on water body. It can be concluded that polluted water is becoming a threat for the crops and also for aquatic environment with the passage of time as more and more wastes are becoming a part of it. Key words: Industrial effluents; Aquatic environment; Seed germination; Seedling growth; Pollution. DOI: 10.3329/bjsir.v45i2.5705Bangladesh J. Sci. Ind. Res. 45(2), 101-104, 2010

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Degradation of oxytetracycline in the aquatic environment: a proposed steady state kinetic model that takes into account hydrolysis, photolysis, microbial degradation and adsorption by colloidal and sediment particles

Environmental Chemistry ◽

10.1071/en14116 ◽

2015 ◽

Vol 12 (2) ◽

pp. 174 ◽

Cited By ~ 10

Author(s):

Mark F. Zaranyika ◽

Pamhidzai Dzomba ◽

Jameson Kugara

Keyword(s):

Kinetic Model ◽

Microbial Degradation ◽

Aquatic Environment ◽

Zero Order ◽

Distilled Water ◽

Water Control ◽

Microbial Resistance ◽

Zero Order Kinetics ◽

Current Medication ◽

Sediment Particles

Environmental context Pollution of the aquatic environment by oxytetracycline can lead to microbial resistance thereby compromising the efficacy of current medication regimes. Adsorption by colloidal and sediment particles reduces the rate at which oxytetracycline degrades, whereas the longer the antimicrobial remains in the aquatic environment, the greater the danger of microbial resistance. There is need therefore for a fuller understanding of the kinetics of degradation of oxytetracycline in aquatic ecosystems before measures for mitigating pollution by the antimicrobial can be designed. Abstract The persistence of oxytetracycline in an aquatic microcosm and distilled water control experiments, was studied over a period of 90 days. An immediate 35% loss as a result of adsorption by the sediment was observed in the microcosm experiment soon after charging. Subsequently triphasic linear rates of oxytetracycline degradation were observed for both the water phase (3.1×10–2, 5.8×10–3 and 1×10–3µgg–1day–1) and sediment phase (4.8×10–2, 6.5×10–3 and 2×10–4µgg–1day–1). Degradation is attributed to photolysis and microbial degradation of the free oxytetracycline in solution, and microbial degradation of the colloidal and sediment particle adsorbed speciation forms. The distilled water control exhibited biphasic zero order kinetics attributed to hydrolysis (2×10–6µgg–1day–1) and microbial degradation (2.7×10–3µgg–1day–1) under dark conditions, and monophasic zero order kinetics attributed to photolysis (6.9×10–3µgg–1day–1) under sunlight exposure. A kinetic model that takes into account hydrolysis, photolysis, microbial degradation and adsorption of the antibiotic by colloidal and sediment particles, is presented to account for the monophasic, biphasic and triphasic zero order kinetics observed in the control and microcosm experiments. Possible remediation strategies for mitigating aquatic environments polluted by the antimicrobial are discussed.

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Electron Microscopy in the Study of Natural Phytoplankton Assemblages

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100119831 ◽

1985 ◽

Vol 43 ◽

pp. 620-623

Author(s):

Linda Sicko-Goad

Keyword(s):

Electron Microscopy ◽

Aquatic Environment ◽

Size Range ◽

Physical Parameters ◽

Specific Information ◽

Phytoplankton Assemblages ◽

Phytoplankton Productivity ◽

Ecosystem Effects ◽

Time Of Year ◽

Species Specific

Although the use of electron microscopy and its varied methodologies is not usually associated with ecological studies, the types of species specific information that can be generated by these techniques are often quite useful in predicting long-term ecosystem effects. The utility of these techniques is especially apparent when one considers both the size range of particles found in the aquatic environment and the complexity of the phytoplankton assemblages.The size range and character of organisms found in the aquatic environment are dependent upon a variety of physical parameters that include sampling depth, location, and time of year. In the winter months, all the Laurentian Great Lakes are uniformly mixed and homothermous in the range of 1.1 to 1.7°C. During this time phytoplankton productivity is quite low.

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Lycopene alleviates sulfamethoxazole-induced hepatotoxicity in grass carp (Ctenopharyngodon idellus) via suppression of oxidative stress, inflammation and apoptosis

Food & Function ◽

10.1039/d0fo01638a ◽

2020 ◽

Vol 11 (10) ◽

pp. 8547-8559

Author(s):

Hongjing Zhao ◽

Yu Wang ◽

Mengyao Mu ◽

Menghao Guo ◽

Hongxian Yu ◽

...

Keyword(s):

Oxidative Stress ◽

Secondary Metabolites ◽

Human Health ◽

Grass Carp ◽

Aquatic Environment ◽

Ctenopharyngodon Idellus

Antibiotics are used worldwide to treat diseases in humans and other animals; most of them and their secondary metabolites are discharged into the aquatic environment, posing a serious threat to human health.

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The Role of Integrated Modeling in Operational Planning for Water Control Structures: A Case Study in the Miami Metropolitan Area

World Water & Environmental Resources Congress 2003 ◽

10.1061/40685(2003)241 ◽

2003 ◽

Author(s):

M. M. Wilsnack ◽

K. D. Konyha

Keyword(s):

Metropolitan Area ◽

Integrated Modeling ◽

Operational Planning ◽

Water Control ◽

Control Structures ◽

Water Control Structures

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Commissioning brownstock washing controls for an evaporator limited mill

TAPPI Journal ◽

10.32964/tj15.7.459 ◽

2016 ◽

Vol 15 (7) ◽

pp. 459-464

Author(s):

RICARDO SANTOS ◽

PETER HART

Keyword(s):

Control System ◽

Negative Impact ◽

Black Liquor ◽

Pulp Mill ◽

Control Program ◽

Separation Point ◽

Water Control ◽

Oxygen Delignification ◽

Percentage Points

An automated shower water control system has been implemented to reduce the volume and variability of weak black liquor being sent from the pulp mill to the evaporators. The washing controls attempt to balance the need for consistent and low soda carryover to the bleach plant with consistently high weak black liquor solids being sent to the evaporators. The washer controls were implemented on two bleachable grade hardwood lines (one with oxygen delignification, one without oxygen delignification) and one pine line. Implementation of the control program resulted in an increase in black liquor solids of 0.6 percentage points for the hardwood lines. Significant foam reduction was realized on the pine line since the pine black liquor solids were able to be consistently maintained just below the soap separation point. Low black liquor solids excursions to the evaporators were eliminated. Bleach plant carryover was stabilized and no negative impact on chemical consumption was noticed when controlling weak black liquor solids to recovery.

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