scholarly journals Removal of Agrochemicals from Waters by Adsorption: A Critical Comparison among Humic-Like Substances, Zeolites, Porous Oxides, and Magnetic Nanocomposites

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 141 ◽  
Author(s):  
Antonello Marocco ◽  
Gianfranco Dell’Agli ◽  
Filomena Sannino ◽  
Serena Esposito ◽  
Barbara Bonelli ◽  
...  
Keyword(s):  
Surface Waters ◽  
Maximum Concentration ◽  
Magnetic Nanocomposites ◽  
Residual Concentration ◽  
Iterative Processes ◽  
Critical Comparison ◽  
Physico Chemical ◽  
Porous Oxides ◽  
Isotherm Of Adsorption ◽  
Points Of View

The use of humic-like substances, zeolites, various porous oxides (i.e., Al, Fe, or Si oxides), and magnetic nanocomposites in the adsorption of agrochemicals from water was critically reviewed. Firstly, the adsorbents were characterized from the structural, textural, and physico-chemical points of view. Secondly, the fundamental aspects of the adsorption of various agrochemicals on the solids (dependence on pH, kinetics, and isotherm of adsorption) were studied and interpreted on the basis of the adsorbent features. Thirdly, iterative processes of agrochemical removal from water by adsorption on the reported solids were described. In particular, in some cases the residual concentration of agrochemicals in water was lower than the maximum concentration of agrochemicals that the Italian regulations allow to be released in wastewater, surface waters, or sink water.

scholarly journals Study of Physico-Chemical Quality of the Surface Waters of the Estuary of the Western Basin of the Oued Oum Errabia-Morocco

2017 ◽  
Vol 10 (05) ◽  
pp. 41-49 ◽  
Author(s):  
Y. Asfers ◽  
H. Taouil ◽  
A. Amine, ◽  
S. Elanz ◽  
S. Ibn Ahmed
Keyword(s):  
Surface Waters ◽  
Chemical Quality ◽  
Western Basin ◽  
Physico Chemical

scholarly journals The beidellite clays from the Bełchatów lignite deposit as a raw material for constructing waterproofing barriers

2017 ◽  
Vol 33 (2) ◽  
pp. 53-67 ◽  
Author(s):  
Tadeusz Ratajczak ◽  
Elżbieta Hycnar ◽  
Piotr Bożęcki
Keyword(s):  
Mechanical Properties ◽  
Surface Waters ◽  
Natural Environment ◽  
Environmental Engineering ◽  
Raw Material ◽  
Underground Waters ◽  
Physico Chemical ◽  
Clay Rocks ◽  
Significant Distance ◽  
Artificial Water

Abstract Disposal sites for both industrial and communal waste are hazardous for the natural environment due to the accumulated materials and their chemical, physical and biological transformations. The products of these processes migrating at a significant distance contaminate mainly underground waters, surface waters and soils. The spreading of the pollutants may be prevented by horizons of clay rocks that form natural geological barriers. The clay rocks of properly selected parameters may be used in the environmental engineering for constructing artificial water-sealing layers. The mineral, chemical, physico-chemical and physico-mechanical properties of the beidellite clays occurring within the lignite deposit in Bełchatów were studied to find out whether they meet the criteria of waterproofing engineering contained in the Polish recommendations and instructions. The results indicate that the beidellite clays of Bełchatów are rocks suitable for this kind of environmental engineering and may be used in constructing the barriers preventing the migration of effluents from landfills.

scholarly journals Biochemical approach to assess groundwater pollution by heavy metals pollutants and organics (case Reghaia Lake, Algeria)

2020 ◽  
Author(s):  
Boussaid Khadidja ◽  
Chebouti–Meziou Nadjiba
Keyword(s):  
Heavy Metals ◽  
Surface Waters ◽  
Atomic Absorption Spectrophotometry ◽  
Poor Quality ◽  
Risk Level ◽  
Chemical Parameters ◽  
Chemical Pollutants ◽  
Physico Chemical ◽  
Biochemical Approach

The article deals with the determination of the factors responsible for the degradation of the Reghaia nature reserve. The objective of this research was to evaluate the spatial variation of chemical pollutants including the accumulation of some heavy metals (Iron, Zinc, Copper, Cobalt, Cadmium, Silver, Nickel and Lead) in the water of Lake Reghaia, Algiers. The study was carried out on 64 water samples taken from Reghaia Lake. For physico-chemical parameters and for MTEs that have been assayed by atomic absorption spectrophotometry. On the chemical level, high levels of nitrates have been recorded in water between 4mg / l, 30mg / l and concerning the phosphate, it has a high content (5.7 mg / l). Surface waters have high levels of suspended solids. BOD5 and COD are high, with COD / DBO5 ratios well above 3, dissolved oxygen values do not comply with WHO standards with P = 0.000001. Water degradation is caused by the presence of latrines, piles of garbage, farms, draining of sanitation facilities in nature and especially in watercourses. Heavy metal pollution is significant and has been reported for Plomp (Pb), copper (Cu), iron (Fe) and cobalt (Co), which reached the high risk level (p <0.01) especially upstream of the Reghaia Lake. And that the MTE contents vary irregularly from one station to another and from one depth to another. The results reveal that the waters of the Réghaia Lake are of very poor quality and the degradation of the ecosystem is more and more increased, to this effect a treatment is recommended.

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

scholarly journals Study of physico-chemical parameters of surface waters in the Lana river, Albania

2018 ◽  
Vol 59 (4) ◽  
pp. 524-528
Author(s):  
Valbona Hoxha ◽  
Kozeta Vaso ◽  
Albana Jano ◽  
Enkela Poro
Keyword(s):  
Surface Waters ◽  
Chemical Parameters ◽  
Physico Chemical

The use of the Biological Diatom Index (BDI) for the assessment of water quality in the Pilica River, Poland

2013 ◽  
Vol 42 (2) ◽  
Author(s):  
Bogusław Szulc ◽  
Katarzyna Szulc
Keyword(s):  
Water Quality ◽  
Chemical Analysis ◽  
Surface Waters ◽  
Ecological Status ◽  
Central Section ◽  
Diatom Index ◽  
Quality Of Water ◽  
Physico Chemical ◽  
Good Ecological Status

AbstractThe main aim of this study was to assess the usefulness of the Biological Diatom Index (BDI) (Lenoir & Coste 1996) for the estimation of water quality in the central section of the Pilica River, located in central Poland in Łódź province. The BDI has never been used before to monitor Polish surface waters. An analysis of the correlations between the values of the BDI and selected physico-chemical parameters was performed, as was an assessment of water quality using the BDI. On the basis of value ranges proposed by Descy and Ector (1996), a good ecological status in the Pilica River was obtained, but this did not correspond with the results achieved from the physico-chemical analysis. This study proposes new value ranges for the BDI. With these new values, the ecological state of the Pilica River changed from good to moderate, which corresponded with the physico-chemical analysis of the water. The new, proposed value ranges for the BDI assess more precisely the quality of water in lowland Polish rivers.

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