USAGE OF BILECIK LEFKE STONE AND BENTONITE CLAY FOR PHOSPHORUS REMOVAL IN WATER

Year 2023, Volume: 24 Issue: - - 19th National Clay Symposium (Clay’2023) Sprecial Issue - 2023, 9 - 16, 29.11.2023

Betül Çanga , Ramazan Meral , Çayan Alkan

https://doi.org/10.18038/estubtda.1369455

Abstract

USAGE OF BILECIK LEFKE STONE AND BENTONITE CLAY FOR PHOSPHORUS REMOVAL IN WATER

Abstract

The rapid increase in the world population, the development of the industry, the excessive usage of fertilizers in agriculture, and the increase in detergents and chemicals used for cleaning accelerate the pollution of water resources. Conservation and recovery of damaged water resources along with the deteriorated ecosystem is of great importance for living things. An important part of water pollution in lakes and rivers is the increase in the content of nutrients. Nutrient elements, especially phosphorus, cause the transparency of water to decrease gradually. Over time, this situation, called eutrophication, causes an algae bloom and the aquatic ecosystem is disrupted. Uncontrolled discharge of wastewater containing phosphorus in high concentrations accelerates this process. These nutrients must be removed in order to maintain water quality and reduce the risk of eutrophication. The main ways of removing phosphorus from water are physical, chemical and biological methods. Among these, as an alternative to settling with chemical substances, the usage of clay (based on fixation) has an important place. In this study, different dosages of bentonite, lefke stone and ferrous sulphate heptahydrate (FeSO4.7H2O) were used in water with three different pH values (4, 7 and 10) and three different phosphorus contents (20, 40, 60 ppm). The per cent yields of the phosphorus removed with ferrous sulphate heptahydrate, lefke stone and bentonite are 72%, 57% and 39%, respectively. In addition, it was determined that the dosage of additives used should be renewed depending on the phosphorus content of the environment and that the high pH value of the environment increased the efficiency, especially in the usage of ferrous sulphate heptahydrate. In conclusion, as an alternative to the usage of chemicals, it has been revealed that lefke stone can be used for phosphorus removal in water, and its effectiveness can be further increased with further studies.

Keywords

Eutrophication, bentonite, phosphorus fixation

Ethical Statement

The authors stated that there are no conflicts of interest regarding the publication of this article.

References

• [1] Ayar E. Removal of phosphorus by adsorption from aqueous medium using bentonite clay. MSc, Süleyman Demirel University, Isparta, Turkey, 2009.
• [2] Çetin P. Development of new methods for phosphorus analysis in drinking water. MSc, İstanbul Technical University, İstanbul, Turkey, 2013.
• [3] Li Y, Nan X, Li D, Wang L, Xu R, Li Q. Advances in the treatment of phosphorus-containing wastewater. In IOP Conference Series: Earth and Environmental Science 2021; 647 (1): 012163.
• [4] Tunçal T, Pala A, Uslu O. Investigation of enhanced biological phosphorus removal characteristics in İzmir Wastewater Treatment Plant. J Water Pollut Con 2008; 18 (1): 17‒31.
• [5] Atıcı G. Determination of the nitrogen and phosphorus removal performance of zeolite and sawdust in wastewater. MSc, Erciyes University, Kayseri, Turkey, 2023.
• [6] Dirim S. Removal of phosphorus by plants in natural wetlands of Kelkit downbasin. MSc, Sakarya University, Sakarya, Turkey, 2006.
• [7] Zeybek Ş. Activated carbon production from walnut shell and phosphorus removal by adsorption method. MSc, Kocaeli University, Kocaeli, Turkey, 2019.
• [8] Erdoğan ÖK. Evaluation and optimization of nitrogen-phosphorus removal performances in domestic wastewater treatment facilities in Antalya province. MSc, Süleyman Demirel University, Isparta, Turkey, 2022.
• [9] Visa M. Tailoring fly ash activated with bentonite as adsorbent for complex wastewater treatment. Appl Surf Sci 2012; 263: 753-762.
• [10] Li W, Ouyang F, An G, Yang C, Zhong R, Xiao F, Peng D, Wang D. Mechanism insight into the role of clay particles on enhancing phosphate removal by ferrate compared with ferric salt. Environ Sci Pollut Res 2021; 28: 45414–45421.
• [11] Elgarhy AH, Mahran BNA, Liu G, Salem TA, ElSayed EE, Ibrahim LA. Comparative study for removal of phosphorus from aqueous solution by natural and activated bentonite. Sci Rep 2022; 12: 19433
• [12] El Refaey A. Effect of calcination and Ca-modified bentonite and zeolite, with respect to phosphorus removal from aqueous solution. Egyptian J Soil Sci 2021; 61(4): 433-444.
• [13] Markou G, Mitrogiannis D, Inglezakis V, Muylaert K, Koukouzas N, Tsoukalas N, Kamitsos E, Palles D, Baziotis I. Ca(OH)2 Pre-treated bentonite for phosphorus removal and recovery from synthetic and real wastewater. Clean- Soil, Air, Water 2018; 46 (2): 1-10.
• [14] Kalpaklı Y. Determination of reaction conditions of the zinc adsorption onto raw Ca-bentonite. OHU J Eng Sci 2018; 7(2): 1004-1012.
• [15] Şahin G, Akova SB. Turkey’s geological values in geographical indications. Asia Minor Studies 2019; 7 (2): 335-354.
• [16] Selim HH, Karakaş A, Coruk Ö. Geological and engineering properties of Lefke Stone (Osmaneli /Bilecik) used as a natural building stone in old structures. Dumlupınar University Engineering Faculty J. of Engineering 2019; 10 (3): 1019-1032.
• [17] Tüzüner A. Soil and Water Analysis Laboratories Handbook. Ministry of Agriculture, Forestry And Rural Affairs 1990; 375.
• [18] Kitson RE, Mellon MG. Colourimetric determination of phosphorus as molybdivanadophosphoric acid. Ind Eng Chem Anal Ed 1944; 16: 379-383.