scholarly journals Coagulation / flocculation process in the removal of trace metals present in industrial wastewater

2006 ◽  
Vol 10 (3) ◽  
Author(s):  
OS Amuda ◽  
IA Amoo ◽  
KO Ipinmoroti ◽  
OO Ajayi
Keyword(s):  
Trace Metals ◽  
Industrial Wastewater ◽  
Flocculation Process

APPLICATION OF THE FLOCCULATION PROCESS IN THE INDUSTRIAL WASTEWATER TREATMENT

2016 ◽  
Vol 15 (3) ◽  
pp. 521-526
Author(s):  
Narcis Barsan ◽  
Mariana Turcu ◽  
Emilian Mo.negu.u ◽  
Mihaela Dascalu ◽  
Dana Chitimus ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Industrial Wastewater Treatment ◽  
Flocculation Process

Accumulation and Translocation of Eight Trace Metals by the Different Tissues of Abelmoschus Esculentus Moench. Irrigated With Untreated Wastewater

2021 ◽  
Author(s):  
Dalia Abd El-Azeem Ahmed ◽  
Tarek M. Galal ◽  
Hatim M. Al-Yasi ◽  
Loutfy M. Hassan ◽  
Dalia Fahmy Slima
Keyword(s):  
Trace Metals ◽  
Industrial Wastewater ◽  
Growth Parameters ◽  
Translocation Factor ◽  
Water Shortage ◽  
Abelmoschus Esculentus ◽  
Water Control ◽  
Edible Part ◽  
Untreated Wastewater ◽  
Different Tissues

Abstract Usage of wastewater to irrigate crops increases in Egypt and the whole world as a result of water shortage. This study is conducted to explore the potential of Abelmoschus esculentus Moench. (Okra plant) to accumulate and translocate eight trace metals: lead: Pb, cadmium: Cd, chromium: Cr, copper: Cu, iron: Fe, manganese: Mn, nickel: Ni and zinc: Zn in its different tissues due to irrigation with untreated industrial wastewater. It extended to assess the effect of the irrigation with wastewater on the growth parameters, nutrients, pigments and organic contents of the cultivated okra plants.Two studied sites at South of Cairo was conducted, the first site (29°42'31.17" N and 31°15'11.56" E); represented by five cultivated fields irrigated with Nile water (control) and the second site (29°42'37.87" N and 31°17'14.53" E); fields irrigated with effluent receive untreated industrial wastewater. Three composite soil and irrigated water samples were collected from each site. A significant decrease in nutrients: nitrogen (N), Potassium (K) and Phosphorous (P) in soil and Plants were resulted due to irrigation with wastewater. Also, there was a significant increase in trace metals concentration in both soil and plants irrigated with wastewater. A significant decrement in okra growth parameters and leaves photosynthetic pigments (chlorophyll a and b and carotenoids) due to irrigation with wastewater. Iron was the highest accumulated metal in the plant's fruits (edible part) irrigated with wastewater. Also, the concentration of Cd, Cu, Fe, Mn, Ni and Zn (42.57, 140,67, 2756.67, 1293.33, 1326.67 and 877.83 mg kg− 1, respectively) was in the phytotoxic range. Wastewater irrigated okras accumulate all of the studied trace metals in their roots (Bioaccumulation factor: BF > 1). In contrast, okra plants had no accumulated trace metals strategy in their shoot, as translocation factor values were less than one. Authors recommended avoiding consuming okra plants cultivated in fields irrigated with wastewater due to high trace metals concentration in their edible part.

scholarly journals Implementation of Modified Acacia Tannin by Mannich Reaction for Removal of Heavy Metals (Cu, Cr and Hg)

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 352 ◽  
Author(s):  
Lorena Lugo ◽  
Alison Martín ◽  
John Diaz ◽  
Alejandro Pérez-Flórez ◽  
Crispin Celis
Keyword(s):  
Heavy Metals ◽  
Mannich Reaction ◽  
Industrial Wastewater ◽  
Oxygen Demand ◽  
Direct Mercury Analyzer ◽  
Removal Of Heavy Metals ◽  
Mercury Analyzer ◽  
Flocculation Process ◽  
Different Levels ◽  
Different Doses

The modified tannin by Mannich reaction was investigated for wastewater treatment. The removal of heavy metals, such as copper, chromium and mercury, in industrial wastewater was evaluated through the coagulation–flocculation technique, using modified Acacia tannin (MAT) as a coagulant agent. The successful tannin modification was evaluated by infrared spectopometry (FTIR), nuclear magnetic resonance (NMR); monitoring the removal of heavy metals was performed by atomic absorption (AA) and a direct mercury analyzer (DMA). Additionally, the parameters of water quality, total suspended solids (TSS), turbidity and chemical oxygen demand (COD) were assessed. Different doses of MAT were evaluated (375 ppm, 750 ppm, 1250 ppm and 1625 ppm) and three different levels of pH (4, 7 and 10). The highest percentages of removal obtained were copper 60%, chromium 87%, mercury 50%–80%, COD 88%, TSS 86% and turbidity 94%, which were achieved with the dose of 375 ppm of MAT at pH 10. The coagulation–flocculation process with the modified Acacia tannin is efficient for the removal of conventional parameters and for a significant removal of the metals studied.

scholarly journals Removal of Turbidity and Sludge Production from Industrial Process Wastewater Treatment by a Rejection of Steel Rich in FeCl3 (SIWW)

2021 ◽  
Vol 11 (5) ◽  
pp. 13359-13376
Keyword(s):  
Industrial Wastewater ◽  
Liquid Waste ◽  
Industrial Process ◽  
High Load ◽  
Pollution Load ◽  
Test Technique ◽  
Jar Test ◽  
Process Wastewater ◽  
Flocculation Process ◽  
Sludge Production

The pollution of industrial wastewater in Morocco poses serious problems for the environment. These effluents must be treated before discharge into the receiving environment. In this work, industrial steel wastewater (SIWW), rich in FeCl3 30%, was used as a useful and profitable coagulant and as liquid waste to be recovered in the treatment of wastewater. The coagulation-flocculation process using ferric chloride was studied using the Jar Test technique. The results obtained using FeCl3 30% (SIWW) have shown that the pH has a very significant effect on reducing turbidity for three types of polluting loads: high load, medium load. The reduction of turbidity and sludge production by FeCl3 30% (SIWW) is a function of the pollutant load of the wastewater to be treated and the pH. The higher the pollution load, the higher the optimal concentration of FeCl3 30% (SIWW). The 30% FeCl3 made it possible to remove more than 95% of the turbidity at a high load. In conclusion, industrial rejection rich in FeCl3 could be used to reduce the turbidity of industrial refinery wastewater considerably.

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