The solvent sublation of bromocresol green from waters solutions
Journal Title: Технологический аудит и резервы производства - Year 2018, Vol 2, Issue 3
Abstract
<p><em>The object of research is wastewaters contaminated with dyes. The available methods for treating wastewater from dyes are often imperfect, ineffective or absent. This calls for the development and implementation of efficient and inexpensive to use and operate dye removal technologies. When treating wastewater, the biggest problem is removing the dyes from dilute low-concentration solutions. For the purification of such effluents, solvent sublation is suggested. This method is based on a combination of flotation and extraction techniques, and on the transmission of gas bubbles through the aqueous phase and removal of the pollutant (sublate) into the organic phase.</em></p><p><em>During the study, imitates of contaminated wastewater with an anionic dye bromocresol green are used in the concentration range of 2–20 mg/dm<sup>3</sup>. The influence of some parameters on the dye removal degree is studied: the pH of the initial solution, the molar ratio surfactant: dye, the size of the air bubbles, the initial concentration of the dye, and the solvent sublation duration. The rational conditions for removing the dye are established: pH 3–3.5, molar ratio bromocresol green-hexadecylpyridinium chloride=1:1. Effective removal of the dye is ensured by using a Schott filter with a pore diameter of 100 μm, an air flow rate of 110–120 cm<sup>3</sup>/min, duration –10 min. Under these conditions, the dye removal degree is 88–99 %.</em></p><p><em>The obtained results confirm the prospects of the proposed method for the effective removal of dyes from low-concentration aqueous solutions. The method has several advantages:</em></p><ul><li><em>possibility to work with large volumes of water bodies;</em></li><li><em>active substance is carried out by gas bubbles and enters the hydrophobic liquid layer without mixing the phases;</em></li><li><em>process is not equilibrium and is not limited by the distribution constant;</em></li><li><em>impossibility of formation of emulsions;</em></li><li><em>multiple concentration of ions in small volumes of organic solvent;</em></li><li><em>requires a small amount of extractant compared to liquid extraction.</em></li></ul><em></em>
Authors and Affiliations
Tetjana Obushenko, Nataliia Tolstopalova, Nadiya Baranuk
Keywords
Related Articles
- EP ID EP527383
- DOI 10.15587/2312-8372.2018.129634
- Views 133
- Downloads 0
Improvement of the method of calculation of mechanical characteristics of a traction motor of direct current with combined excitation
<p><em>The object of the study is the process of appearing an electromagnetic moment in traction motors of combined excitation of a trolleybus at synchronous inclusion of both components of the excitation system. This pr...
Analysis of public institutes activity as instrument of settlement the economic relations of region
<p class="Default"><em>The object of the research is public institutions, which activities create certain conditions for improving the positive dynamics of economic relations in the regions, especially in Donetsk and Luh...
Development of software for analysis and optimization of operating modes of underground gas stores
<p><em>The object of research is underground gas storage facilities (UGS) and their technological facilities that are involved in the processes of gas injection, storage and extraction. One of the most important identifi...
Development of a method for calculating the safe position of military units by using artificial neural networks based on swarm algorithms
<p class="a"><em>The object of research is development of a method for finding a safe position for military units in combat conditions, using swarm algorithms and neural networks. One of the most problematic places is th...
Development of method of increasing the performance of touch networks of measurement of distances
<p><em>The subject of the study is the wireless sensor network of the ZigBee protocol, which in this study is proposed for performing the function of measuring the distance between objects. The main areas of application...