Investigated of Desalination of Saline Waters by Using Dunaliella Salina Algae and Its Effect on Water Ions

Abstract

Nowadays, due to augmentation of population and expansion of cities and the limitation of fresh water sources in the world, existing water resources cannot meet the human needs. Desalination or reduction of salinity of water through biological methods involves the use of plant species, microorganisms, algae or a combination of them, which can be effective in reducing water salinity. The objective of this study was to investigate the desalination of saline waters by using Dunaliella salina algae. For this purpose, the experiments were carried out as factorial based on completely randomized design. The expected tests were conducted in a laboratory controlled condition for humidity, light and temperature (90 days). During this research, the Electrical Conductivity (EC) was measured daily. The results showed that salt absorption in Dunaliella salina algae was significantly different. High salt absorption was observed in Dunaliella salina at a concentration of 130mS.cm-1. Due to the constant humidity, light and temperature, salt removal from saline water was observed in laboratory conditions. The results of this study indicate that significant reduction of chlorine, sodium and bicarbonate levels were observed using Dunaliella salina algae. According to the results of this study, it seems that reducing salt absorption in algae is due to the use of salt in the metabolism and the growth and proliferation of algae. The absorption process in this study showed that the catch of Dunaliella salina has a good ability to remove salt and can be used as an appropriate suggestion for salt removal from saline water.

Monitoring indigenous microalgae using derivative spectrophotometry and comparison with M. aeruginosa and C. vulgaris

“…As noted from various studies (Winter et al 2011;Menetrez 2012;Scaife et al 2015;Laurens 2017;Laurens et al 2017;Jaroo et al 2019;Moayedi et al 2019;Kerich 2020), different forms of microalgae are being cultivated to be used to carry out water and wastewater treatment, desalination and bioenergy generation; but it is equally important to detect the levels of microalgae in our water bodies in order to avoid harmful microalgal blooms causing adverse health effects to humans and other organisms in the environment. Hence, this study looked into exploring derivative spectrophotometry as a tool to detect and monitor indigenous microalgae concentrations in water.…”

“…The relative ease with which microalgae grow can be both advantageous and disadvantageous. Microalgae can be commercially cultivated and harvested and used as a source for bioenergy generation (Menetrez 2012;Scaife et al 2015;Laurens 2017;Laurens et al 2017) or water treatment (Jaroo et al 2019;Moayedi et al 2019;Kerich 2020), but undesired growth of algal blooms in water bodies can lead to environmental problems (Winter et al 2011).…”

Use of <em>Dunaliella salina</em> in Environmental Applications <sup>†</sup>

“…In addition, laboratory-scale studies are also carried out in membrane filtration and advanced oxidation systems [21]. Especially in areas where water is limited and in salty water environments, D. salina is also used in the desalination process [39].…”

A Statistical Technique for Modelling Dissolved Oxygen in Salt Lakes

“…Some algae species, phytoplankton, and a few kinds of fish exist (Awadh & Muslim, 2014;Hassan et al, 2006). Hence, fish species need to be preserved in the lake to meet the human essentials (Cordier et al, 2020;Moayedi et al, 2019). The most important element in aquatic ecosystems is oxygen because it is necessary for life, controls many chemical reactions through oxidation, and gives a general indication of aquatic systems health (Cole & Wells, 2006).…”