Impact of Wastewater Spreading on Properties of Tunisian Soil under Arid Climate

Boutheina Gargouri, Samia Ben Brahim, Fatma Marrakchi, Bechir Ben Rouina, Wojciech Kujawski and Mohamed Bouaziz
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Boutheina Gargouri: Laboratoire d’Electrochimie et Environnement, Ecole Nationale d’Ingénieurs de Sfax, University of Sfax, BP “1173”, Sfax 3038, Tunisia
Samia Ben Brahim: Laboratoire d’Electrochimie et Environnement, Ecole Nationale d’Ingénieurs de Sfax, University of Sfax, BP “1173”, Sfax 3038, Tunisia
Fatma Marrakchi: Laboratoire d’Electrochimie et Environnement, Ecole Nationale d’Ingénieurs de Sfax, University of Sfax, BP “1173”, Sfax 3038, Tunisia
Bechir Ben Rouina: Laboratoire d’Amélioration de la Productivité Oléicole et des Arbres Fruitiers, Olive Tree Institute of Sfax, BP “1087”, Sfax 3000, Tunisia
Wojciech Kujawski: Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarina Street, 87-100 Toruń, Poland
Mohamed Bouaziz: Laboratoire d’Electrochimie et Environnement, Ecole Nationale d’Ingénieurs de Sfax, University of Sfax, BP “1173”, Sfax 3038, Tunisia

Sustainability, 2022, vol. 14, issue 6, 1-15

Abstract: The environmental impacts of irrigating an olive field with olive mill wastewater (OMW) and treated wastewater (TWW) on soil properties were investigated. The effect of different irrigation treatments of OMW (50 m 3 ha −1 , 100 m 3 ha −1 , and 200 m 3 ha −1 ) and TWW at different soil depths was studied. The obtained findings revealed that TWW application augmented soil pH; EC values; and P, K and Ca contents in all soil layers. However, Mg and Na concentrations, as well as organic matter content (OM), were proven to decrease with TWW irrigation throughout the experiment. Whereas soil adjusted with OMW showed a decrease in K, Ca, Mg and Na contents with soil depth, a significant increase was observed with the increase in applied OMW dose. On the other hand, total phenols and OM content increased significantly with the rise in OMW levels in all the investigated layers compared to the control sample.

Keywords: olive mill wastewater; treated wastewater; irrigation; soil chemical properties (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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