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      Phytoremediation of methylene blue using duckweed ( Lemna minor)

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          Abstract

          Azo dyes are the largest class of synthetic dyes and are utilized in several industries. Effluents containing dyes are released to the environment and pose harm to humans who might be exposed to these contaminants. This study aims to investigate the removal of methylene blue (MB) dye using duckweed ( Lemna minor). L. minor (2 g) was exposed into 50 mg/L of MB dyes for 24 h. The absorbance values were measured at 0, 0.5, 1, 2, 3, 4, 5, 6, and 24 h with a maximum wavelength of 665 nm. The dye removal percentage and relative growth rate of L. minor during exposure to MB were observed. The removal percentage was 80.56 ± 0.44% for 24 h with a relative growth rate of 0.006/h. L. minor has potential as a phytoremediation agent to remove dyes from wastewater.

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          Removal of Heavy Metals from Industrial Wastewaters: A Review

          Mashallah Rezakazemi, Meisam Ansarpour, Ahmad Azari … (2017)
          Article 0 comments Cited 209 times – based on 0 reviews     Review now
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            Microbial and Plant-Assisted Bioremediation of Heavy Metal Polluted Environments: A Review

            Omena Ojuederie, Olubukola Babalola (2017)
            Environmental pollution from hazardous waste materials, organic pollutants and heavy metals, has adversely affected the natural ecosystem to the detriment of man. These pollutants arise from anthropogenic sources as well as natural disasters such as hurricanes and volcanic eruptions. Toxic metals could accumulate in agricultural soils and get into the food chain, thereby becoming a major threat to food security. Conventional and physical methods are expensive and not effective in areas with low metal toxicity. Bioremediation is therefore an eco-friendly and efficient method of reclaiming environments contaminated with heavy metals by making use of the inherent biological mechanisms of microorganisms and plants to eradicate hazardous contaminants. This review discusses the toxic effects of heavy metal pollution and the mechanisms used by microbes and plants for environmental remediation. It also emphasized the importance of modern biotechnological techniques and approaches in improving the ability of microbial enzymes to effectively degrade heavy metals at a faster rate, highlighting recent advances in microbial bioremediation and phytoremediation for the removal of heavy metals from the environment as well as future prospects and limitations. However, strict adherence to biosafety regulations must be followed in the use of biotechnological methods to ensure safety of the environment.
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              Methods for detection of mitochondrial and cellular reactive oxygen species.

              Sergey Dikalov, David G. Harrison (2014)
              Mitochondrial and cellular reactive oxygen species (ROS) play important roles in both physiological and pathological processes. Different ROS, such as superoxide (O2(•-)), hydrogen peroxide, and peroxynitrite (ONOO(-)), stimulate distinct cell-signaling pathways and lead to diverse outcomes depending on their amount and subcellular localization. A variety of methods have been developed for ROS detection; however, many of these methods are not specific, do not allow subcellular localization, and can produce artifacts. In this review, we will critically analyze ROS detection and present advantages and the shortcomings of several available methods.
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                Author and article information

                Contributors
                Muhammad Fauzul Imron
                Journal
                Journal ID (nlm-ta): Heliyon
                Journal ID (iso-abbrev): Heliyon
                Title: Heliyon
                Publisher: Elsevier
                ISSN (Electronic): 2405-8440
                Publication date PMC-release: 02 August 2019
                Publication date Collection: August 2019
                Publication date (Electronic): 02 August 2019
                Volume: 5
                Issue: 8
                Electronic Location Identifier: e02206
                Affiliations
                [a ]Study Program of Environmental Engineering, Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Kampus C UNAIR, Jalan Mulyorejo, Surabaya, 60115, Indonesia
                [b ]Study Program of Waste Treatment Engineering, Department of Marine Engineering, Politeknik Perkapalan Negeri Surabaya, Jalan Teknik Kimia, Kampus ITS Keputih, Sukolilo, Surabaya, 60111, Indonesia
                Author notes
                Article
                Publisher ID: S2405-8440(19)35866-9 Publisher ID: e02206
                DOI: 10.1016/j.heliyon.2019.e02206
                PMC ID: 6684478
                SO-VID: 2db52a70-16f5-4d97-ad39-503a506e0455
                Copyright © © 2019 The Authors. Published by Elsevier Ltd.
                License:

                This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

                History
                Date received : 18 May 2019
                Date revision received : 25 June 2019
                Date accepted : 30 July 2019
                Categories
                Subject: Article

                Keywords: environmental engineering,environmental science,green engineering,waste treatment,water pollution,aquatic plants,azo dyes,biosorption,decolorization,relative growth rate,wastewater
                Data availability:
                Keywords: environmental engineering, environmental science, green engineering, waste treatment, water pollution, aquatic plants, azo dyes, biosorption, decolorization, relative growth rate, wastewater

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