Dana A. Da’na
Bio: Dana A. Da’na is an academic researcher from Florida State University College of Arts and Sciences. The author has contributed to research in topics: Adsorption & Reverse osmosis. The author has an hindex of 3, co-authored 7 publications receiving 187 citations.
TL;DR: In this paper, the authors highlight characteristics of produced water in detail and physical, chemical, and biological techniques used for its treatment, and reuse of produced waters for different purposes has been discussed.
Abstract: In oil and gas industry, produced water is considered as the largest waste stream, which contains relatively higher concentration of hydrocarbons, heavy metals and other pollutants. Due to the increase in industrial activities, the generation of produced water has increased all over the world and its treatment for reuse is now important from environmental perspective. Treatment of produced water can be done through various methods including physical (membrane filtration, adsorption etc.), chemical (precipitation, oxidation), and biological (activated sludge, biological aerated filters and others) methods. This paper aims to highlight characteristics of produced water in detail and physical, chemical, and biological techniques used for its treatment. In addition, reuse of produced water for different purposes has been discussed. At the end, few case studies from different countries, related to the treatment and reuse of their produced waters have been included.
TL;DR: It was found that the increase in temperature enhanced the membrane scaling which was evident by the severe flux decline over time leading to increase in mass of crystals precipitated (Mt) and thickness of the scale layer and there was strong positive correlation between Mt and the temperature.
TL;DR: In this article, a low-cost and environmentally friendly adsorbent by using date pits (DP) impregnated with cellulose nanocrystals (CNCs) and ionic liquid (IL), named IL-CNC@DP, was presented.
TL;DR: In this article, the effect of concentration of calcium and sulfate ions from 20 to 150mM on calcium sulfate scaling of reverse osmosis (RO) and graphene oxide functionalized RO membranes was investigated.
Abstract: In seawater reverse osmosis, membrane scaling is one of the major issues affecting its widespread application in the desalination industry. In this paper, the effect of concentration of calcium and sulfate ions from 20 to 150 mM on calcium sulfate scaling of reverse osmosis (RO) and graphene oxide functionalized RO membranes was investigated. It was noted that the permeate flux declined more than 90% when the concentration of ions was increased to 50–150 mM. Principal component analysis was applied to the flux decline over time data, which helped to cluster the data sets based on the extent of membrane scaling at different conditions. The results of scanning electron microscopy showed that the morphology of crystals varied with the concentration from rod shaped to broad rosette structures. Furthermore, it was also found that the membrane surface was fully covered with precipitates, which resulted from both bulk and surface crystallization at higher concentrations of ions in feedwater. The results of X-ray diffraction confirmed that the precipitates formed on the membrane at different concentrations belong to gypsum (CaSO4·2H2O). The results of Fourier Transform Infrared spectroscopy helped to understand the interaction of gypsum with functional groups (−OH, −COOH, C H) of the membrane, which also varied at different concentrations. The contact angle analysis of the scaled membrane was also done to investigate the effect of scaling on the hydrophilicity of the membrane surface, thereby, affecting its inter/intra foulant interactions.
TL;DR: In this paper, a review of the potential of using biological treatments in the removal of various pollutants from produced water such as conventional activated sludge, sequential batch reactor, and fixed-film biological aerated filter reactors were systematically discussed.
TL;DR: In this paper, a review article describes various applications of nanomaterials in removing different types of impurities from polluted water, which carried huge potential to treat polluted water (containing metal toxin substance, different organic and inorganic impurities) very effectively due to their unique properties like greater surface area, able to work at low concentration, etc.
Abstract: Water is an essential part of life and its availability is important for all living creatures. On the other side, the world is suffering from a major problem of drinking water. There are several gases, microorganisms and other toxins (chemicals and heavy metals) added into water during rain, flowing water, etc. which is responsible for water pollution. This review article describes various applications of nanomaterial in removing different types of impurities from polluted water. There are various kinds of nanomaterials, which carried huge potential to treat polluted water (containing metal toxin substance, different organic and inorganic impurities) very effectively due to their unique properties like greater surface area, able to work at low concentration, etc. The nanostructured catalytic membranes, nanosorbents and nanophotocatalyst based approaches to remove pollutants from wastewater are eco-friendly and efficient, but they require more energy, more investment in order to purify the wastewater. There are many challenges and issues of wastewater treatment. Some precautions are also required to keep away from ecological and health issues. New modern equipment for wastewater treatment should be flexible, low cost and efficient for the commercialization purpose.
TL;DR: Effective measures to maintain sustainable development in the watershed are proposed, along with a framework for an early warning system adopting the latest technologies (geographic information systems (GIS), remote sensing (RS)) for preventing eutrophication.
TL;DR: In this paper, polybenzimidazoleamide (PBI), graphene oxide (GO) and reduced GO (rGO) nanocomposite membranes were developed via the common blade coating and phase inversion technique for the treatment of produced water from the oil and gas industry.
TL;DR: A review of the different membrane fouling types, foulinginducing factors, predictive methods, diagnostic techniques, and mitigation strategies, with a special focus on RO membranes, is presented in this article.
Abstract: Membrane-based separation has gained increased popularity over the past few decades, particularly reverse osmosis (RO). A major impediment to the improved performance of membrane separation processes, in general, is membrane fouling. Fouling has detrimental effects on the membrane’s performance and integrity, as the deposition and accumulation of foulants on its surface and/or within its pores leads to a decline in the permeate flux, deterioration of selectivity, and permeability, as well as a significantly reduced lifespan. Several factors influence the fouling-propensity of a membrane, such as surface morphology, roughness, hydrophobicity, and material of fabrication. Generally, fouling can be categorized into particulate, organic, inorganic, and biofouling. Efficient prediction techniques and diagnostics are integral for strategizing control, management, and mitigation interventions to minimize the damage of fouling occurrences in the membranes. To improve the antifouling characteristics of RO membranes, surface enhancements by different chemical and physical means have been extensively sought after. Moreover, research efforts have been directed towards synthesizing membranes using novel materials that would improve their antifouling performance. This paper presents a review of the different membrane fouling types, fouling-inducing factors, predictive methods, diagnostic techniques, and mitigation strategies, with a special focus on RO membrane fouling.
TL;DR: In this article, the state-of-the-art membrane-based technologies including both stand-alone and their hybrid system, for PW treatment and reclamation are highlighted, and the challenges and future outlooks of current PW desalination technologies are also highlighted.