Growth regime and environmental remediation of microalgae

Abstract

Massive industrialization and urbanization of civilization during the last few decades have made a thrust in heavy metal pollution in various water bodies. In past, various kinds of conventional metal ion remediation technologies, such as cementation, osmosis, reverse osmosis, ultrafiltration, etc., have been practised. However, most of these technologies are quite expensive, and lead to the generation of secondary chemical sludge. However, biosorption of heavy metal ions is significantly inexpensive and an eco-friendly technology. Among the series of heavy metals, zinc has gained the significant interest due to its toxicity and easy availability in water bodies. Biosorption of zinc in liquid phase by living, nonliving, conventional and non-conventional biosorbents has been practised extensively in the past. This literature review focuses on the recent trends practised in the field of biosorption of zinc from liquid phase. The present work provides deep insight into various aspects of biosorption of zinc by different mechanisms of biosorption, bioaccumulation, isotherm, kinetic and mechanistic modeling. An exhaustive comparison among different sorts of biomasses has also been given in the present work to enlist all the milestones of biosorption.

Extremophile Microalgae: the potential for biotechnological application

“…In this context, Hammed et al. () evidenced the necessity to direct the strains selection toward identification of algae that are extremophiles. Acidophilic extremophiles have the potential to provide much knowledge of cellular tolerance mechanisms to advance and optimize their bioremediation potential, as well as providing several species for the construction of bioremediation systems (Varshney et al.…”

Phycoremediation of hydrocarbon using two marine seaweeds from the Bay of Bengal coast of India

“…They are toxic to marine life as they are polycyclic aromatic hydrocarbons (PAHs) which are the components in crude oil. They are found to be difficult to clean up and predominant constituents present in crude oil sediment and marine environment for a prolonged period [10]. Ecological effects of accidental oil spills is a challenging subject of both laboratory and field research [5].…”

“…Physical and chemical methods are efficient but difficult to remove high molecular weight oil that may need a new strategy of phycoremediation. Algae have been reported to utilize various contaminants such as pesticides, cyanides, hydrocarbons and heavy metals as carbon and nitrogen sources [10].…”

“…Seaweeds are unique because they have the potentiality of autotrophic photosynthesis by which it utilizes both organic and inorganic carbon substrate from polluted water and phycoremediate. Seaweeds are capable of bio-absorption of pollutants in wastewater because their cell wall is made up of carbohydrate structure [10].…”

Effect of Enzymatic Beech Fagus Sylvatica Wood Hydrolysate on Chlorella Biomass, Fatty Acid and Pigment Production

“…Microalgae are photoautotrophic microorganisms, capable of using light energy to fix CO 2 and discharging O 2 as a waste product during photosynthesis [1]. Microalgal cells contain valuable biocompounds, such as fatty acids and pigments, which can find applications in many branches of industry [2].…”