scholarly journals Applying EFDC Explorer model in the Gallinas River, Mexico to estimate its assimilation capacity for water quality protection

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Claudia Villota-López ◽  
Clemente Rodríguez-Cuevas ◽  
Franklin Torres-Bejarano ◽  
Rodolfo Cisneros-Pérez ◽  
Rodolfo Cisneros-Almazán ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Industrial Wastewater ◽  
Socioeconomic Development ◽  
Inorganic Compounds ◽  
Organic Content ◽  
Phosphorus Compounds ◽  
Active Components ◽  
Nitrogenous Substances ◽  
Efficient Recovery ◽  
Assimilation Capacity

AbstractSanitary and industrial wastewater discharged into rivers, is a general problem that occurs in most of the world and Mexico is not the exception, the main goal of this research is to determine based on simulations of pollutants concentrations, the assimilation capacity of the Gallinas River against discharges of agricultural and industrial wastewater from the cultivation and processing of sugar cane under two different hypothetical simulation scenarios, based on reproducing two well know scenarios. In sugarcane cultivation, large quantities of fertilizers are used whose main active components are based on nitrogen or phosphorus compounds, therefore, the wastewater resulting from sugarcane processing contains a high organic content from 20 to 40% of inorganic compounds, such as nitrogenous substances, organic acids, and phosphorous sulfates. For this reason, the physical–chemical variables of interest analyzed in this work are the PO$$_4$$ 4 (phosphate), NO$$_3$$ 3 (nitrate), and DO (dissolved oxygen). With the simulation results according to each scenery, it can be determined, that despite the continuous discharge of polluting elements, the Gallinas River has a good assimilation capacity thanks to reaeration processes that permit efficient recovery of the dissolved oxygen in the water column. Gallinas River is located in the region known as the Huasteca Potosina, this investigation is relevant for the region due to the River is of vital importance being the main tributary that allows socioeconomic development activities in this zone. To carry out the simulations, was used the Explorer Modeling System 8.4 (EFCD) model and was performed two samplings campaign along 15 km in the water body to calibrate the numerical model to represent the dry and wet seasons during May and September respectively named as calibration scenarios.

A Survey for Salinity Intrusion and Pollution Assessment in Maputo Estuary

1987 ◽  
Vol 19 (5-6) ◽  
pp. 823-832 ◽  
Author(s):  
J. M. Salomão
Keyword(s):  
Dissolved Oxygen ◽  
Industrial Wastewater ◽  
Pollution Assessment ◽  
Saturation Level ◽  
Salinity Intrusion ◽  
Pollutant Load ◽  
Oxygen Levels ◽  
Salinity Gradients

Following surveys recently carried out in Maputo estuary, a survey with the purpose of acquiring data required to characterize the estuary was carried out in December 1983. After reviewing the hydrology of the tributaries to the estuary, the parameters to be monitored - salinity, conductivity, temperature, and dissolved oxygen, are referred. Finally, taking also into account previous information available, an evaluation of the results, and an assessment of the estuary are done. The estuary can be classified as well mixed, since the vertical salinity gradients found are small. The Umbeluzi estuary, however, is partially mixed. Temperature decreases with the depth, and when moving downstream. Some pollution was found along the lower part of the estuary, probably due to the discharge of domestic and industrial wastewater, which brings the dissolved oxygen figures below the saturation level. As for the upper part of the estuary, the dissolved oxygen levels are not only dependent on the pollutant load, but also on the growing of algae, which by photosynthesis under daylight produce oxygen that dissolves into the water. Quite often, the dissolved oxygen figures are above the saturation level. The growth of algae could be due to the input of phosphorus and nitrogen brought in by the tributary streams. A pollutant load discharged upstream could be the reason for some pollution seen in the Umbeluzi estuary.

scholarly journals Soft-Bottom macrobenthic communities of the Vitória Bay estuarine system, South-eastern Brazil

2005 ◽  
Vol 53 (1-2) ◽  
pp. 23-38 ◽  
Author(s):  
Rosebel C. Nalesso ◽  
Jean-Christophe Joyeux ◽  
Cintia O. Quintana ◽  
Evelise Torezani ◽  
Ana Clara Paz Otegui
Keyword(s):  
Dissolved Oxygen ◽  
Organic Matter Content ◽  
Abundant Species ◽  
Coarse Sand ◽  
Organic Content ◽  
Matter Content ◽  
Estuarine System ◽  
South Eastern ◽  
Eastern Brazil ◽  
Physico Chemical

The present work describes and analyses the structure of the macrobenthic epi- and infaunal assemblage of the estuarine system of Vitória Bay, South-eastern Brazil, from January 1998 to June 1999. Replicated sampling at intertidal and subtidal levels was conducted quarterly at ten stations. Intertidal and subtidal sediment composition was characterised. Water physico-chemical parameters were measured in situ. A total of 10,695 individuals, belonging to 144 taxa, were collected. Molluscs, crustaceans and polychaetes were the most abundant groups. The bivalves Anomalocardia brasiliana, Mytella guyanensis and M. falcata were the most abundant species. Locally, significant discharges of residential and industrial wastewater resulted in high organic content in the sediment (up to 30%) and low dissolved oxygen concentration in the water (< 1mg.l-1). Near the two entrances of the bay, high hydrodynamic activity and coarse sand reduced the detrimental effects of raw and treated sewage inputs. Species richness (S), diversity (H') and total abundance (A) decreased from outer-bay stations (22 < S < 72; 1.99 < H' < 2.85; 320 < A < 1737) towards inner-bay stations (2 < S < 45; 0.59 < H' < 2.67; 2 < A < 1317), where salinity and dissolved oxygen were lowest and organic matter content highest.

Efficient recovery of palladium nanoparticles from industrial wastewater and their catalytic activity toward reduction of 4-nitrophenol

Chemosphere ◽  
2021 ◽  
Vol 262 ◽  
pp. 128358
Author(s):  
Seung Jun Lee ◽  
Yiseul Yu ◽  
Hyeon Jin Jung ◽  
Shreyanka Shankar Naik ◽  
Sanghun Yeon ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Industrial Wastewater ◽  
Efficient Recovery

Minimization of organic content in simulated industrial wastewater by Fenton type processes: A case study

2009 ◽  
Vol 170 (2-3) ◽  
pp. 954-961 ◽  
Author(s):  
Ivana Grčić ◽  
Dinko Vujević ◽  
Josip Šepčić ◽  
Natalija Koprivanac
Keyword(s):  
Industrial Wastewater ◽  
Organic Content

scholarly journals Generation, characteristics and disposal of sew age sludge produced on treatment plant of Tatarstan

2019 ◽  
pp. 537-543
Author(s):  
Svetlana Yu. Selivanovskaya ◽  
Venera Z. Latypova
Keyword(s):  
Sewage Sludge ◽  
Industrial Wastewater ◽  
Metal Content ◽  
Treatment Plant ◽  
Chemical Compounds ◽  
Organic Content ◽  
Environmental Damage ◽  
Toxicity Bioassay ◽  
Metal Composition

Treatment of wastewater unavoidably results in the generation of huge quantities of sludge in which pollutants concentrate and which must be disposed of. The aim of this study was to compare the quality of organic matter, the metal composition and toxic organic content in different sewage sludge. The presence of these substances caused environmental damage in soil, plants, groundwater and air. Sewage sludge was periodically sampled from five treatment plant treated municipal and industrial wastewater in common in Almetevsk, Elabuga, Zainsk, Kazan, Chistopol (Tatarstan, Russia). Knowledge of the metal content of the sludge is a key step in selecting or in ruling out the various disposal alternatives. For the approval of possible utilization of sewage sludge as fertilizer the estimation of the chemical compounds has to be supplemented with the toxicity bioassay.

Development of adsorbent for the simultaneous removal of organic and inorganic contaminants from aqueous solution

2011 ◽  
Vol 64 (9) ◽  
pp. 1821-1827 ◽  
Author(s):  
J. W. Choi ◽  
S. G. Chung ◽  
S. W. Hong ◽  
D. J. Kim ◽  
S. H. Lee
Keyword(s):  
Industrial Wastewater ◽  
Inorganic Compounds ◽  
Langmuir Equation ◽  
Contaminated Groundwater ◽  
Batch Experiments ◽  
Inorganic Contaminants ◽  
Mixed Contaminants ◽  
Gel Beads ◽  
Synthetic Zeolites ◽  
Benzene Toluene

In this study, a modified adsorbent, alginate complex beads, was prepared and applied to the removal of mixed contaminants from wastewater. The alginate complex beads were generated by the immobilization of powdered activated carbon and synthetic zeolites onto alginate gel beads, which were then dried at 110 °C for 20 h until the diameter had been reduced to 1 mm. This dry technique increased the hardness of the adsorbent to assure its durability and application. The adsorption onto the alginate complex beads of organic and inorganic compounds, as target contaminants, was investigated by performing both equilibrium and kinetic batch experiments. From the adsorption isotherms, according to the Langmuir equation, the alginate complex bead was capable of effectively removing benzene, toluene, zinc and cadmium. From kinetic batch experiments, the removal efficiencies of benzene, toluene, zinc and cadmium were found to be 66.5, 92.4, 74.1 and 76.7%, respectively, for initial solution concentrations of 100 mg L−1. The results indicated that the adsorbent developed in this study has the potential to be a promising material for the removal of mixed pollutants from industrial wastewater or contaminated groundwater.

scholarly journals Spatial analysis of water quality of the Karra River, Hetauda, Nepal

2016 ◽  
Vol 8 (1) ◽  
pp. 58-65
Author(s):  
Sadhana Pradhanang
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Surface Waters ◽  
Industrial Wastewater ◽  
Good Condition ◽  
Oxygen Demand ◽  
Industrial Effluents ◽  
Physico Chemical ◽  
Water Region

The assessment of water quality of Karra River in Hetauda, Nepal was carried out by determining the changes in the concentration levels of eight physico-chemical parameters (pH, Electric conductivity (EC), bicarbonate, dissolved oxygen (DO), silica, chemical oxygen demand (COD), phosphate and nitrate). The samples were collected from upstream, industrial belt and downstream of the Karra River. The Karra River is the dumping ground for industrial effluents of Hetauda industrial district (HID). On analysis, the concentrations of most of the physico-chemicals parameters were found to be above the prescribed limits for industrial wastewater into inland surface waters. Dissolved Oxygen was found to be in the range of 0.49- 8.47 mg/L while COD, nitrate and phosphate were recorded in the range of 8.3-367 mg/L, 0.35- 78.22 mg/L and 0.01-1.64 mg/L, respectively. Concentrations of most of these parameters were within the prescribed limits in the samples collected from upstream and downstream, revealing the river still in good condition at these points indicating less human interference at the head water region and good self-purification capacity at downstream. However the concentrations of the pollutants’ parameters are higher at the sample points just after effluent discharge.Journal of Hydrology and Meteorology, Vol. 8(1) p.58-65

Removal of organic matter from wastewater coming from fruit juice production using solar photo-Fenton process

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rodrigo Poblete ◽  
Ernesto Cortés ◽  
Norma Pérez ◽  
Marcos Valdivia ◽  
Manuel I. Maldonado
Keyword(s):  
Organic Matter ◽  
Industrial Wastewater ◽  
Ethanol Oxidation ◽  
Fruit Juice ◽  
Grape Juice ◽  
Organic Content ◽  
Fenton Process ◽  
High Concentration ◽  
Refractory Organic Matter ◽  
High Organic Content

Abstract The grape juice production generates an industrial wastewater that has a high concentration of organic matter and several polyphenols, such as ethanol. Therefore, the discharge of this wastewater can produce environmental problems. The aim of this work was to determine the optimal concentration of the reagents involved in a solar photo-Fenton process in the treatment of wastewater coming from juice. The process was analysed in a factorial design, as a function of H2O2 (900, 1000, 1100 mg/L) and Fe2+ (90, 100, 110 mg/L) concentration. The grape juice wastewater presents high organic content (20,500 mg/L COD and 5.4 mg/L polyphenols). Also, the presence of alcohols such ethanol, ethyl acetate and 2-metil-1-propanol was confirmed. The results showed that highest COD (>27%) and polyphenols removal (>36%) were obtained in experiments with 1100 mg H2O2/L and 100 mg Fe2+/L. In treatments with higher COD removal, 2-metil-1-propanol was detected as an intermediate of ethanol oxidation. These results proved that solar photo-Fenton is a suitable approach for treating the refractory organic matter from grape juice.

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