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Sahabudin E, Kubo S, Yuzir MAM, Othman N, Nadia Md Akhir F, Suzuki K, Yoneda K, Maeda Y, Suzuki I, Hara H, Iwamoto K. The cadmium tolerance and bioaccumulation mechanism of Tetratostichococcus sp. P1: insight from transcriptomics analysis. Bioengineered 2024; 15:2314888. [PMID: 38375815 DOI: 10.1080/21655979.2024.2314888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Accepted: 02/01/2024] [Indexed: 02/21/2024] Open
Abstract
Cadmium (Cd) has become a severe issue in relatively low concentration and attracts expert attention due to its toxicity, accumulation, and biomagnification in living organisms. Cd does not have a biological role and causes serious health issues. Therefore, Cd pollutants should be reduced and removed from the environment. Microalgae have great potential for Cd absorption for waste treatment since they are more environmentally friendly than existing treatment methods and have strong metal sorption selectivity. This study evaluated the tolerance and ability of the microalga Tetratostichococcus sp. P1 to remove Cd ions under acidic conditions and reveal mechanisms based on transcriptomics analysis. The results showed that Tetratostichococcus sp. P1 had a high Cd tolerance that survived under the presence of Cd up to 100 µM, and IC50, the half-maximal inhibitory concentration value, was 57.0 μM, calculated from the change in growth rate based on the chlorophyll content. Long-term Cd exposure affected the algal morphology and photosynthetic pigments of the alga. Tetratostichococcus sp. P1 removed Cd with a maximum uptake of 1.55 mg g-1 dry weight. Transcriptomic analysis revealed the upregulation of the expression of genes related to metal binding, such as metallothionein. Group A, Group B transporters and glutathione, were also found upregulated. While the downregulation of the genes were related to photosynthesis, mitochondria electron transport, ABC-2 transporter, polysaccharide metabolic process, and cell division. This research is the first study on heavy metal bioremediation using Tetratostichococcus sp. P1 and provides a new potential microalga strain for heavy metal removal in wastewater.[Figure: see text]Abbreviations:BP: Biological process; bZIP: Basic Leucine Zipper; CC: Cellular component; ccc1: Ca (II)-sensitive cross complementary 1; Cd: Cadmium; CDF: Cation diffusion facilitator; Chl: Chlorophyll; CTR: Cu TRansporter families; DAGs: Directed acyclic graphs; DEGs: Differentially expressed genes; DVR: Divinyl chlorophyllide, an 8-vinyl-reductase; FPN: FerroportinN; FTIR: Fourier transform infrared; FTR: Fe TRansporter; GO: Gene Ontology; IC50: Growth half maximal inhibitory concentration; ICP: Inductively coupled plasma; MF: molecular function; NRAMPs: Natural resistance-associated aacrophage proteins; OD: Optical density; RPKM: Reads Per Kilobase of Exon Per Million Reads Mapped; VIT1: Vacuolar iron transporter 1 families; ZIPs: Zrt-, Irt-like proteins.
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Affiliation(s)
- Eri Sahabudin
- Department of Chemical and Environmental Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
| | - Shohei Kubo
- Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Muhamad Ali Muhammad Yuzir
- Department of Chemical and Environmental Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
| | - Nor'azizi Othman
- Department of Chemical and Environmental Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
| | - Fazrena Nadia Md Akhir
- Department of Chemical and Environmental Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
| | - Kengo Suzuki
- Department of Chemical and Environmental Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
- Euglena Co. Ltd, Minato‑ku, Japan
- Microalgae Production Control Technology Laboratory, Yokohama, Kanagawa, Japan
| | - Kohei Yoneda
- Institute of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yoshiaki Maeda
- Institute of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Iwane Suzuki
- Institute of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hirofumi Hara
- Department of Biotechnology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Japan
| | - Koji Iwamoto
- Department of Chemical and Environmental Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
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Yeheyo HA, Ealias AM, George G, Jagannathan U. Bioremediation potential of microalgae for sustainable soil treatment in India: A comprehensive review on heavy metal and pesticide contaminant removal. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 363:121409. [PMID: 38861884 DOI: 10.1016/j.jenvman.2024.121409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/26/2024] [Accepted: 06/05/2024] [Indexed: 06/13/2024]
Abstract
The escalating environmental concerns arising from soils contamination with heavy metals (HMs) and pesticides (PSTs) necessitate the development of sustainable and effective remediation strategies. These contaminants, known for their carcinogenic properties and toxicity even at small amounts, pose significant threats to both environmental ecology and human health. While various chemical and physical treatments are employed globally, their acceptance is often hindered by prolonged remediation times, high costs, and inefficacy in areas with exceptionally high pollutant concentrations. A promising emerging trend in addressing this issue is the utilization of microalgae for bioremediation. Bioremediation, particularly through microalgae, presents numerous benefits such as high efficiency, low cost, easy accessibility and an eco-friendly nature. This approach has gained widespread use in remediating HM and PST pollution, especially in large areas. This comprehensive review systematically explores the bioremediation potential of microalgae, shedding light on their application in mitigating soil pollutants. The paper summarizes the mechanisms by which microalgae remediate HMs and PSTs and considers various factors influencing the process, such as pH, temperature, pollutant concentration, co-existing pollutants, time of exposure, nutrient availability, and light intensity. Additionally, the review delves into the response and tolerance of various microalgae strains to these contaminants, along with their bioaccumulation capabilities. Challenges and future prospects in the microalgal bioremediation of pollutants are also discussed. Overall, the aim is to offer valuable insights to facilitate the future development of commercially viable and efficient microalgae-based solutions for pollutant bioremediation.
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Affiliation(s)
- Hillary Agaba Yeheyo
- Department of Civil Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, A.P, 522302, India.
| | - Anu Mary Ealias
- Department of Civil Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, A.P, 522302, India.
| | - Giphin George
- Department of Mechanical Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, A.P, 522302, India.
| | - Umamaheswari Jagannathan
- Department of Civil Engineering, Priyadarshini Engineering College, Vaniyambadi, Tirupattur, TN, 635751, India.
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Zhan D, Liu Y, Yu N, Hao C. Photosynthetic response of Chlamydomonas reinhardtii and Chlamydomonas sp. 1710 to zinc toxicity. Front Microbiol 2024; 15:1383360. [PMID: 38650883 PMCID: PMC11033396 DOI: 10.3389/fmicb.2024.1383360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 03/25/2024] [Indexed: 04/25/2024] Open
Abstract
Zinc (Zn) is an essential trace element but can lead to water contamination and ecological deterioration when present in excessive amounts. Therefore, investigating the photosynthetic response of microalgae to Zn stress is of great significance. In this study, we assessed the photosynthetic responses of neutrophilic Chlamydomonas reinhardtii and acidophilic Chlamydomonas sp. 1710 to Zn exposure for 96 h. The specific growth rate (μ), chlorophyll-a (Chl-a) content, and chlorophyll fluorescence parameters were determined. The results demonstrated that Chlamydomonas sp. 1710 was much more tolerant to Zn than C. reinhardtii, with the half-maximal inhibitory concentration (IC50) values of 225.4 mg/L and 23.4 mg/L, respectively. The μ and Chl-a content of C. reinhardtii decreased in the presence of 15 mg/L Zn, whereas those of Chlamydomonas sp. 1710 were unaffected by as high as 100 mg/L Zn. Chlorophyll fluorescence parameters indicated that the regulation of energy dissipation, including non-photochemical quenching, played a crucial role in Zn stress resistance for both Chlamydomonas strains. However, in the case of C. reinhardtii, non-photochemical quenching was inhibited by 5 mg/L Zn in the first 48 h, whereas for Chlamydomonas sp. 1710, it remained unaffected under 100 mg/L Zn. Chlamydomonas sp. 1710 also exhibited a 20 times stronger capacity for regulating the electron transfer rate than C. reinhardtii under Zn stress. The light energy utilization efficiency (α) of Chlamydomonas sp. 1710 had the most highly non-linear correlation with μ, indicating the energy utilization and regulation process of Chlamydomonas sp. 1710 was well protected under Zn stress. Collectively, our findings demonstrate that the photosystem of Chlamydomonas sp. 1710 is much more resilient and tolerant than that of C. reinhardtii under Zn stress.
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Affiliation(s)
- Di Zhan
- Center for Geomicrobiology and Biogeochemistry Research, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, China
- School of Earth Sciences and Resources, China University of Geosciences, Beijing, China
| | - Yue Liu
- Center for Geomicrobiology and Biogeochemistry Research, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, China
- School of Water Resources and Environment, China University of Geosciences, Beijing, China
| | - Na Yu
- Center for Geomicrobiology and Biogeochemistry Research, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, China
- School of Water Resources and Environment, China University of Geosciences, Beijing, China
| | - Chunbo Hao
- Center for Geomicrobiology and Biogeochemistry Research, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, China
- School of Water Resources and Environment, China University of Geosciences, Beijing, China
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4
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Wang J, Tian Q, Zhou H, Kang J, Yu X, Qiu G, Shen L. Physiological regulation of microalgae under cadmium stress and response mechanisms of time-series analysis using metabolomics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170278. [PMID: 38262539 DOI: 10.1016/j.scitotenv.2024.170278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 01/25/2024]
Abstract
The investigation of heavy metal wastewater treatment utilizing microalgae adsorption has been extensively demonstrated. However, the response mechanism based on metabolomics to analyze the time-series changes of microalgae under Cd stress has not been described in detail. In this study, SEM/TEM demonstrated that Cd accumulated on the cell surface of microalgae and was bioconcentrated in the cytoplasm, vesicles, and chloroplasts. Carbonyl/quinone/ketone/carboxyl groups (OCO), membrane polysaccharides (OH), and phospholipids (PO) were involved in the interaction of Cd ions, and the chlorophyll content underwent a process of decreasing in the early stage (1.62 mg/g at 48 h) and recovering to the normal level in the late stage, and the contents of MDA, GSH, and SOD were all increased (29.7 nmol/g, 0.23 mg/g, and 30.01 u/106 cells) and then gradually returned to the steady state. The results of EPS content and fluorescent labeling showed that Cd induced the overexpression and synthesis of extracellular polysaccharides and proteins, which is one of the defense mechanisms participating in the reduction of cellular damage by complexed Cd. Metabolomics results indicated that the malate synthesis pathway was activated after Cd-20 h, and the microalgal cells began to shift the metabolic pathway to storage lipid or polysaccharide biosynthesis. In the Calvin cycle, the expression of D-Sedoheptulose 7-phosphate in Cd-20 h_vs_ck and Cd-72 h_vs_Cd-20 h firstly declined and then increased, and the photosynthesis system was suppressed at the beginning, and then gradually returned to normal to maintain the successful development of the dark reaction. The results of time series analysis revealed that the response of microalgae to Cd was categorized into fast response and slow response to regulate cell adsorption and growth metabolism.
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Affiliation(s)
- Junjun Wang
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
| | - Qinghua Tian
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
| | - Hao Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Jue Kang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Xinyi Yu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Guanzhou Qiu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China.
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5
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Hazaimeh M. Phycoremediation of heavy metals and production of biofuel from generated algal biomass: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:109955-109972. [PMID: 37801245 DOI: 10.1007/s11356-023-30190-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 09/26/2023] [Indexed: 10/07/2023]
Abstract
Due to human activity and natural processes, heavy metal contamination frequently affects the earth's water resources. The pollution can be categorized as resistant and persistent since it poses a significant risk to terrestrial and marine biological systems and human health. Because of this, several appeals and demands have been made worldwide to try and clean up these contaminants. Through bioremediation, algal cells are frequently employed to adsorb and eliminate heavy metals from the environment. Bioremediation is seen as a desirable strategy with few adverse effects and low cost. Activities and procedures for bioremediation involving algal cells depend on various environmental factors, including salinity, pH, temperature, the concentration of heavy metals, the amount of alga biomass, and food availability. Additionally, the effectiveness of removing heavy metals from the environment by assessing how environmental circumstances affect algal activities. The main issues discussed are (1) heavy metal pollution of water bodies, the role of algal cells in heavy metal removal, the methods by which algae cells take up and store heavy metals, and the process of turning the algae biomass produced into biofuel. (2) To overcome the environmental factors and improve heavy metals bioremediation, many strategies are applied, such as immobilizing the cells, consortium culture, and using dry mass rather than living cells. (3) The processes for converting produced algal biomass into biofuels like biodiesel and biomethanol. The present study discusses the life cycle assessment and the limitations of biofuel products from algae biomass.
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Affiliation(s)
- Mohammad Hazaimeh
- Department of Biology, College of Science in Zulfi, Majmaah University, Majmaah, ah-11952, Saudi Arabia.
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6
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Zhao K, Zhao X, Gao T, Li X, Wang G, Pan X, Wang J. Dielectrophoresis-assisted removal of Cd and Cu heavy metal ions by using Chlorella microalgae. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122110. [PMID: 37390915 DOI: 10.1016/j.envpol.2023.122110] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/13/2023] [Accepted: 06/24/2023] [Indexed: 07/02/2023]
Abstract
A novel dielectrophoresis (DEP)-assisted device for the bioremediation of heavy metal ions by using Chlorella microalgae is presented in this paper. To generate the DEP forces, pairs of electrode mesh were inserted in the DEP-assisted device. By applying DC electric field via the electrodes, the inhomogeneous electric field gradient is induced and the strongest non-uniform electric field exists near the mesh cross-corner. After the adsorption of Cd and Cu heavy metal ions by Chlorella, the Chlorella chain were trapped along the vicinity of the electrode mesh. Then, the effects of Chlorella concentration on the adsorption of heavy metal ions, and the applied voltage and electrode mesh size on the removal of Chlorella are conducted. In the co-existing Cd and Cu solutions, the individual adsorption ratio of Cd and Cu reaches as high as approximately 96% and 98%, respectively, showing excellent bioremediation capability of multiple heavy metal ions in wastewater. By adjusting the applied electric voltage and the mesh size, the Chlorella adsorbed with Cd and Cu are captured by negative DC-DEP effects and the removal ratio of Chlorella reach an average of 97%, providing a method for the removal of multiple heavy metal ions in wastewater by using Chlorella microalgae.
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Affiliation(s)
- Kai Zhao
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, 116026 Dalian, China; Department of Information Science and Technology, Dalian Maritime University, 116026, Dalian, China
| | - Xun Zhao
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, 116026 Dalian, China; Department of Information Science and Technology, Dalian Maritime University, 116026, Dalian, China
| | - Tianbo Gao
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, 116026 Dalian, China; Department of Information Science and Technology, Dalian Maritime University, 116026, Dalian, China
| | - Xuan Li
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, 116026 Dalian, China; Department of Information Science and Technology, Dalian Maritime University, 116026, Dalian, China
| | - Guanqi Wang
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, 116026 Dalian, China; Department of Information Science and Technology, Dalian Maritime University, 116026, Dalian, China
| | - Xinxiang Pan
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, 116026 Dalian, China; Department of Maritime, Guangdong Ocean University, 524000, Zhanjiang, China
| | - Junsheng Wang
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, 116026 Dalian, China; Department of Information Science and Technology, Dalian Maritime University, 116026, Dalian, China.
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Khan S, Ullah A, Ayaz T, Aziz A, Aman K, Habib M, Yilmaz S, Farid A, Yasmin H, Ali Q. Phycoremediation of industrial wastewater using Vaucheria debaryana and Cladophora glomerata. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:825. [PMID: 37294451 DOI: 10.1007/s10661-023-11357-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 05/08/2023] [Indexed: 06/10/2023]
Abstract
Rapid urbanization and industrialization are regarded as the leading causes of environmental pollution, mainly aquatic pollution. This study was carried out to investigate the use of algal species Cladophora glomerata (CG) and Vaucheria debaryana (VD) as a cost-effective and environmentally friendly phycoremediators for composite industrial effluent. After the pot experimentation using algal species, a considerable decrease in electrical conductivity (EC: 49.10-81.46%), dissolved oxygen (DO: 3.76-8.60%), biological oxygen demand (BOD: 7.81-39.28%), chemical oxygen demand (COD: 7.81-39.28%), total suspended solids (TSS: 38.09-62.21%), and total dissolved solids (TDS: 38.09-62.21%) was observed. Before and after experimentation, the heavy metals were also quantified using atomic absorption spectrophotometry (AAS), and considerable reduction was observed in Cd (41.02-48.75%) and Pb (48.72-57.03%) concentrations. The Cd concentration determined in CTCG (control treatment for Cladophora glomerata containing tap water), CG (treatment pot for Cladophora glomerata containing industrial effluents), CTVD (control pot for Vaucheria debaryana containing tap water), and VD (treatment pot for Vaucheria debaryana containing industrial effluents) biomass was 0.06, 0.499, 0.035, and 0.476 mg/kg, respectively. The Pb uptake determined in CTCG, CG, CTVD, and VD was 0.32, 1.12, 0.31, and 0.49 mg/kg, respectively, using wet digestion method and ASS. The data revealed that C. glomerata has the highest bioconcentration factor for Cd (98.42%), followed by Pb (92.57%) in treatment pots containing industrial effluents (CG and VD). Furthermore, C. glomerata showed the highest bioconcentration factor for Pb (86.49%) as compared to Cd (75%) in tap water (CTCG and CTVD). The t test analysis revealed that heavy metal concentrations significantly (p ≤ 0.05) reduced through the phycoremediation process. The analysis found that C. glomerata removed 48.75% of Cd and 57.027% of Pb from industrial effluents. Phytotoxicity assay was also performed by cultivating Triticum sp. in order to analyze the toxicity of the untreated (control) and treated water samples. Phytotoxicity result shows that the effluent treated with both Cladophora glomerata and Vaucheria debaryana gives better wheat (Triticum sp.) plant % germination, plant height (cm), and root height (cm). The highest plant % germination was showed by treated CTCG (90%), followed by CTVD (80%) and CG (70%) and VD (70%). The study concluded that phycoremediation using C. glomerata and V. debaryana is one of the environment-friendly approaches. The proposed algal-based strategy is economically viable and environmentally sustainable that can be utilized for the remediation of industrial effluents.
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Affiliation(s)
- Sara Khan
- Department of Health and Biological Sciences, Abasyn University, Peshawar, 25000, Pakistan
| | - Amin Ullah
- Department of Health and Biological Sciences, Abasyn University, Peshawar, 25000, Pakistan.
| | - Tehreem Ayaz
- School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Aamir Aziz
- Sarhad Institute of Allied Health Sciences, Sarhad University of Science and Information Technology Peshawar, Peshawar, Pakistan
| | - Komal Aman
- Department of Health and Biological Sciences, Abasyn University, Peshawar, 25000, Pakistan
| | - Mudassir Habib
- School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Semih Yilmaz
- Department of Agricultural Biotechnology, Erciyes University, Kayseri, Turkey
| | - Arshad Farid
- Department of Biotechnology, Gomal University, Dera Ismail Khan, Pakistan
| | - Humaira Yasmin
- Department of Biosciences, COMSATS University, Islamabad, 45550, Pakistan
| | - Qurban Ali
- Department of Plant Breeding and Genetics, University of the Punjab Lahore, Lahore, Pakistan.
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Chakravorty M, Nanda M, Bisht B, Sharma R, Kumar S, Mishra A, Vlaskin MS, Chauhan PK, Kumar V. Heavy metal tolerance in microalgae: Detoxification mechanisms and applications. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 260:106555. [PMID: 37196506 DOI: 10.1016/j.aquatox.2023.106555] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 04/15/2023] [Accepted: 05/05/2023] [Indexed: 05/19/2023]
Abstract
The proficiency of microalgae to resist heavy metals has potential to be beneficial in resolving various environmental challenges. Global situations such as the need for cost-effective and ecological ways of remediation of contaminated water and for the development of bioenergy sources could employ microalgae. In a medium with the presence of heavy metals, microalgae utilize different mechanisms to uptake the metal and further detoxify it. Biosorption and the next process of bioaccumulation are two such major steps and they also include the assistance of different transporters at different stages of heavy metal tolerance. This capability has also proved to be efficient in eradicating many heavy metals like Chromium, Copper, Lead, Arsenic, Mercury, Nickel and Cadmium from the environment they are present in. This indicates the possibility of the application of microalgae as a biological way of remediating contaminated water. Heavy metal resistance quality also allows various microalgal species to contribute in the generation of biofuels like biodiesel and biohydrogen. Many research works have also explored the capacity of microalgae in nanotechnology for the formation of nanoparticles due to its relevant characteristics. Various studies have also revealed that biochar deduced from microalgae or a combination of biochar and microalgae can have wide applications specially in deprivation of heavy metals from an environment. This review focuses on the strategies adopted by microalgae, various transporters involved in the process of tolerating heavy metals and the applications where microalgae can participate owing to its ability to resist metals.
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Affiliation(s)
- Manami Chakravorty
- Department of Biotechnology, Dolphin (PG) Institute of Biomedical & Natural Sciences, Dehradun-248007, India
| | - Manisha Nanda
- Department of Biotechnology, Dolphin (PG) Institute of Biomedical & Natural Sciences, Dehradun-248007, India
| | - Bhawna Bisht
- Algal Research and Bioenergy Lab, Department of Food Science and Technology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand 248002, India
| | - Rohit Sharma
- School of Engineering, University of Petroleum and Energy Studies, Dehradun, India
| | - Sanjay Kumar
- Algal Research and Bioenergy Lab, Department of Food Science and Technology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand 248002, India
| | - Abhilasha Mishra
- Department of Chemistry, Graphic Era (Deemed to be University), Dehradun, Uttarakhand 248002, India
| | - Mikhail S Vlaskin
- Joint Institute for High Temperatures of the Russian Academy of Sciences, 13/2 Izhorskaya St, Moscow 125412, Russian Federation
| | - P K Chauhan
- Faculty of Applied Sciences and Biotechnology, Shoolini University, Solan 173229, HP, India
| | - Vinod Kumar
- Algal Research and Bioenergy Lab, Department of Food Science and Technology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand 248002, India; Peoples' Friendship University of Russia (RUDN University), Moscow 117198, Russian Federation.
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Tao Y, He M, Chen B, Ruan G, Xu P, Xia Y, Song G, Bi Y, Hu B. Evaluation of Cd 2+ stress on Synechocystis sp. PCC6803 based on single-cell elemental accumulation and algal toxicological response. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 258:106499. [PMID: 36965429 DOI: 10.1016/j.aquatox.2023.106499] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/14/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
With the development of single cell analysis techniques, the concept of precision toxicology has been proposed in recent years. Due to the heterogeneity of cells, we need to perform toxicological assessments on individual cells. Microalgae, one kind of important primary producers, play as a major pathway by which heavy metals enter the food chain and thus accumulate/transfer to higher trophic levels. Herein, the biosorption of Cd (Ex-Cd) and bioaccumulation of Cd (In-Cd) for Synechocystis sp. PCC 6803 were investigated by online 3D droplet microfluidic device combined with inductively coupled plasma mass spectrometry detection. Meanwhile, the algal toxicological responses of the algae cell to Cd2+ exposure under different concentration (50, 100, and 150 μg L - 1) and time (15 min, 24, 48 and 96 h) were studied. Combining single-cell analysis with toxicological indicators, the toxicity mechanism of Cd2+to algal was discussed. The single cell analysis results revealed heterogeneity in cellular uptake of Cd2+. The proportion of Cd-containing cells and Cd content in single algal cells all reached the maximum at 24 h. The uptake of Cd2+ occurred within 15 min under all tested exposure concentrations and a large part of Cd2+ were adsorbed on the algal cells surface. The Pearson correlation analysis showed that cell density, chlorophyll a and carotenoids were significantly negatively correlated with Cd accumulation, whereas ROS level and SOD activity were significantly positively correlated with Cd accumulation. It suggested that Cd2+accumulated intracellular would show toxic effects on the algal cells and oxidative stress is the main mechanism of Cd toxicity to algal cells. This work promotes our understanding of the toxicological responses of microalgae under Cd stress at single cells level.
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Affiliation(s)
- Yao Tao
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Man He
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Beibei Chen
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Gang Ruan
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Pingping Xu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yixue Xia
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Gaofei Song
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yonghong Bi
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Bin Hu
- Department of Chemistry, Wuhan University, Wuhan 430072, China.
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10
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Song X, Kong F, Liu BF, Song Q, Ren NQ, Ren HY. Thallium-mediated NO signaling induced lipid accumulation in microalgae and its role in heavy metal bioremediation. WATER RESEARCH 2023; 239:120027. [PMID: 37167853 DOI: 10.1016/j.watres.2023.120027] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/12/2023] [Accepted: 04/29/2023] [Indexed: 05/13/2023]
Abstract
Thallium (Tl+) is a trace metal with extreme toxicity and is highly soluble in water, posing a great risk to ecological and human safety. This work aimed to investigate the role played by Tl+ in regulating lipid accumulation in microalgae and the removal efficiency of Tl+. The effect of Tl+ on the cell growth, lipid production and Tl+ removal efficiency of Parachlorella kessleri R-3 was studied. Low concentrations of Tl+ had no significant effect on the biomass of microalgae. When the Tl+ concentration exceeded 5 μg L-1, the biomass of microalgae showed significant decrease. The highest lipid content of 63.65% and lipid productivity of 334.55 mg L-1 d-1 were obtained in microalgae treated with 10 and 5 μg L-1 Tl+, respectively. Microalgae can efficiently remove Tl+ and the Tl+ removal efficiency can reach 100% at Tl+ concentrations of 0-25 μg L-1. The maximum nitric oxide (NO) level of 470.48 fluorescence intensity (1 × 106 cells)-1 and glutathione (GSH) content of 343.51 nmol g-1 (fresh alga) were obtained under 5 μg L-1 Tl+ stress conditions. Furthermore, the exogenous donor sodium nitroprusside (SNP) supplemented with NO was induced in microalgae to obtain a high lipid content (59.99%), lipid productivity (397.99 mg L-1 d-1) and GSH content (430.22 nmol g-1 (fresh alga)). The corresponding analysis results indicated that NO could participate in the signal transduction pathway through modulation of reactive oxygen species (ROS) signaling to activate the antioxidant system by increasing the GSH content to eliminate oxidative damage induced by Tl+ stress. In addition, NO regulation of ROS signaling may enhance transcription factors associated with lipid synthesis, which stimulates the expression of genes related to lipid synthesis, leading to increased lipid biosynthesis in microalgae. Moreover, it was found that the change in Tl+ had little effect on the fatty acid components and biodiesel properties. This study showed that Tl+ stress can promote lipid accumulation in microalgae for biodiesel production and simultaneously effectively remove Tl+, which provided evidence that NO was involved in signal transduction and antioxidant defense, and improved the understanding of the interrelation between NO and ROS to regulate lipid accumulation in microalgae.
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Affiliation(s)
- Xueting Song
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Fanying Kong
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
| | - Bing-Feng Liu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qingqing Song
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hong-Yu Ren
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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11
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Chen D, Wang G, Chen C, Feng Z, Jiang Y, Yu H, Li M, Chao Y, Tang Y, Wang S, Qiu R. The interplay between microalgae and toxic metal(loid)s: mechanisms and implications in AMD phycoremediation coupled with Fe/Mn mineralization. JOURNAL OF HAZARDOUS MATERIALS 2023; 454:131498. [PMID: 37146335 DOI: 10.1016/j.jhazmat.2023.131498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 04/10/2023] [Accepted: 04/24/2023] [Indexed: 05/07/2023]
Abstract
Acid mine drainage (AMD) is low-pH with high concentration of sulfates and toxic metal(loid)s (e.g. As, Cd, Pb, Cu, Zn), thereby posing a global environmental problem. For decades, microalgae have been used to remediate metal(loid)s in AMD, as they have various adaptive mechanisms for tolerating extreme environmental stress. Their main phycoremediation mechanisms are biosorption, bioaccumulation, coupling with sulfate-reducing bacteria, alkalization, biotransformation, and Fe/Mn mineral formation. This review summarizes how microalgae cope with metal(loid) stress and their specific mechanisms of phycoremediation in AMD. Based on the universal physiological characteristics of microalgae and the properties of their secretions, several Fe/Mn mineralization mechanisms induced by photosynthesis, free radicals, microalgal-bacterial reciprocity, and algal organic matter are proposed. Notably, microalgae can also reduce Fe(III) and inhibit mineralization, which is environmentally unfavorable. Therefore, the comprehensive environmental effects of microalgal co-occurring and cyclical opposing processes must be carefully considered. Using chemical and biological perspectives, this review innovatively proposes several specific processes and mechanisms of Fe/Mn mineralization that are mediated by microalgae, providing a theoretical basis for the geochemistry of metal(loid)s and natural attenuation of pollutants in AMD.
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Affiliation(s)
- Daijie Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Guobao Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Chiyu Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Zekai Feng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuanyuan Jiang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Hang Yu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Mengyao Li
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuanqing Chao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Yetao Tang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Shizhong Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China.
| | - Rongliang Qiu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
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12
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Ghaffar I, Hussain A, Hasan A, Deepanraj B. Microalgal-induced remediation of wastewaters loaded with organic and inorganic pollutants: An overview. CHEMOSPHERE 2023; 320:137921. [PMID: 36682632 DOI: 10.1016/j.chemosphere.2023.137921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/26/2022] [Accepted: 01/18/2023] [Indexed: 06/17/2023]
Abstract
The recent surge in industrialization has intensified the accumulation of various types of organic and inorganic pollutants due to the illegal dumping of partially and/or untreated wastewater effluents in the environment. The pollutants emitted by several industries pose serious risk to the environment, animals and human beings. Management and diminution of these hazardous organic pollutants have become an incipient research interest. Traditional physiochemical methods are energy intensive and produce secondary pollutants. So, bioremediation via microalgae has appeared to be an eco-friendly and sustainable technique to curb the adverse effects of organic and inorganic contaminants because microalgae can degrade complex organic compounds and convert them into simpler and non-toxic substances without the release of secondary pollutants. Even some of the organic pollutants can be exploited by microalgae as a source of carbon in mixotrophic cultivation. Literature survey has revealed that use of the latest modification techniques for microalgae such as immobilization (on alginate, carrageena and agar), pigment-extraction, and pretreatment (with acids) have enhaced their bioremedial potential. Moreover, microalgal components i.e., biopolymers and extracellular polymeric substances (EPS) can potentially be exploited in the biosorption of pollutants. Though bioremediation of wastewaters by microalgae is quite well-studied realm but some aspects like structural and functional responses of microalgae toward pollutant derivatives/by-products (formed during biodegradation), use of genetic engineering to improve the tolerance of microalgae against higher concentrations of polluatans, and harvesting cost reduction, and monitoring of parameters at large-scale still need more focus. This review discusses the accumulation of different types of pollutants into the environment through various sources and the mechanisms used by microalgae to degrade commonly occurring organic and inorganic pollutants.
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Affiliation(s)
- Imania Ghaffar
- Applied and Environmental Microbiology Laboratory, Department of Wildlife and Ecology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Ali Hussain
- Applied and Environmental Microbiology Laboratory, Institute of Zoology, University of the Punjab, Lahore, Pakistan.
| | - Ali Hasan
- Applied and Environmental Microbiology Laboratory, Institute of Zoology, University of the Punjab, Lahore, Pakistan
| | - Balakrishnan Deepanraj
- Department of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, Saudi Arabia.
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13
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Gao T, Zhao K, Zhang J, Zhang K. DC-Dielectrophoretic Manipulation and Isolation of Microplastic Particle-Treated Microalgae Cells in Asymmetric-Orifice-Based Microfluidic Chip. MICROMACHINES 2023; 14:229. [PMID: 36677290 PMCID: PMC9865771 DOI: 10.3390/mi14010229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/10/2023] [Accepted: 01/13/2023] [Indexed: 06/17/2023]
Abstract
A novel direct-current dielectrophoretic (DC-DEP) method is proposed for the manipulation and isolation of microplastic particle (MP)-treated microalgae cells according to their dielectric properties in a microfluidic chip. The lateral migration and trajectory of the microalgae cells were investigated. To induce stronger DC-DEP effects, a non-homogeneous electric-field gradient was generated by applying the DC electric voltages through triple pairs of asymmetric orifices with three small orifices and one large orifice located on the opposite microchannel wall across the whole channel, leading to the enhanced magnitude of the non-uniform electric-field gradient and effective dielectrophoretic area. The effects of the applied voltage, the polystyrene (PS) adsorption coverage, and thickness on the DC-DEP behaviors and migration were numerically investigated, and it was found that the effect of the PS adsorption thickness of the Chlorella cells on the DC-DEP behaviors can be neglected, but the effect on their trajectory shifts cannot. In this way, the separation of 3 µm and 6 µm Chlorella coated with 100% PS particles and the isolation of the Chlorella cells from those coated with various coverages and thicknesses of PS particles was successfully achieved, providing a promising method for the isolation of microalgae cells and the removal of undesired cells from a target suspension.
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Affiliation(s)
- Tianbo Gao
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Department of Information Science and Technology, Dalian Maritime University, Dalian 116026, China
| | - Kai Zhao
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Department of Information Science and Technology, Dalian Maritime University, Dalian 116026, China
| | - Jiaqi Zhang
- 2020 X-Lab, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Kaihuan Zhang
- 2020 X-Lab, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
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14
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Manikandan SK, Pallavi P, Shetty K, Bhattacharjee D, Giannakoudakis DA, Katsoyiannis IA, Nair V. Effective Usage of Biochar and Microorganisms for the Removal of Heavy Metal Ions and Pesticides. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020719. [PMID: 36677777 PMCID: PMC9862088 DOI: 10.3390/molecules28020719] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/03/2023] [Accepted: 01/06/2023] [Indexed: 01/12/2023]
Abstract
The bioremediation of heavy metal ions and pesticides is both cost-effective and environmentally friendly. Microbial remediation is considered superior to conventional abiotic remediation processes, due to its cost-effectiveness, decrement of biological and chemical sludge, selectivity toward specific metal ions, and high removal efficiency in dilute effluents. Immobilization technology using biochar as a carrier is one important approach for advancing microbial remediation. This article provides an overview of biochar-based materials, including their design and production strategies, physicochemical properties, and applications as adsorbents and support for microorganisms. Microorganisms that can cope with the various heavy metal ions and/or pesticides that enter the environment are also outlined in this review. Pesticide and heavy metal bioremediation can be influenced by microbial activity, pollutant bioavailability, and environmental factors, such as pH and temperature. Furthermore, by elucidating the interaction mechanisms, this paper summarizes the microbe-mediated remediation of heavy metals and pesticides. In this review, we also compile and discuss those works focusing on the study of various bioremediation strategies utilizing biochar and microorganisms and how the immobilized bacteria on biochar contribute to the improvement of bioremediation strategies. There is also a summary of the sources and harmful effects of pesticides and heavy metals. Finally, based on the research described above, this study outlines the future scope of this field.
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Affiliation(s)
- Soumya K. Manikandan
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Mangalore 575025, India
| | - Pratyasha Pallavi
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Mangalore 575025, India
| | - Krishan Shetty
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Mangalore 575025, India
| | | | - Dimitrios A. Giannakoudakis
- Laboratory of Chemical and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
- Correspondence: (D.A.G.); (V.N.)
| | - Ioannis A. Katsoyiannis
- Laboratory of Chemical and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Vaishakh Nair
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Mangalore 575025, India
- Correspondence: (D.A.G.); (V.N.)
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15
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Soto-Sánchez O, Hidalgo P, González A, Oliveira PE, Hernández Arias AJ, Dantagnan P. Microalgae as Raw Materials for Aquafeeds: Growth Kinetics and Improvement Strategies of Polyunsaturated Fatty Acids Production. AQUACULTURE NUTRITION 2023; 2023:5110281. [PMID: 36860971 PMCID: PMC9973195 DOI: 10.1155/2023/5110281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 11/25/2022] [Accepted: 12/13/2022] [Indexed: 06/18/2023]
Abstract
Studies have shown that ancient cultures used microalgae as food for centuries. Currently, scientific reports highlight the value of nutritional composition of microalgae and their ability to accumulate polyunsaturated fatty acids at certain operational conditions. These characteristics are gaining increasing interest for the aquaculture industry which is searching for cost-effective replacements for fish meal and oil because these commodities are one of the most significant operational expenses and their dependency has become a bottleneck for their sustainable development of the aquaculture industry. This review is aimed at highlighting the use of microalgae as polyunsaturated fatty acid source in aquaculture feed formulations, despite their scarce production at industrial scale. Moreover, this document includes several approaches to improve microalgae production and to increase the content of polyunsaturated fatty acids with emphasis in the accumulation of DHA, EPA, and ARA. Furthermore, the document compiles several studies which prove microalgae-based aquafeeds for marine and freshwater species. Finally, the study explores the aspects that intervene in production kinetics and improvement strategies with possibilities for upscaling and facing main challenges of using microalgae in the commercial production of aquafeeds.
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Affiliation(s)
- Oscar Soto-Sánchez
- Departamento de Procesos Industriales, Facultad de Ingeniería, Universidad Católica de Temuco, Temuco, Chile
| | - Pamela Hidalgo
- Departamento de Procesos Industriales, Facultad de Ingeniería, Universidad Católica de Temuco, Temuco, Chile
- Núcleo de Investigación en Bioproductos y Materiales Avanzados, Departamento de Procesos Industriales, Facultad de Ingeniería, Universidad Católica de Temuco, Temuco, Chile
| | - Aixa González
- Departamento de Procesos Industriales, Facultad de Ingeniería, Universidad Católica de Temuco, Temuco, Chile
- Núcleo de Investigación en Bioproductos y Materiales Avanzados, Departamento de Procesos Industriales, Facultad de Ingeniería, Universidad Católica de Temuco, Temuco, Chile
| | - Patricia E. Oliveira
- Departamento de Procesos Industriales, Facultad de Ingeniería, Universidad Católica de Temuco, Temuco, Chile
- Núcleo de Investigación en Bioproductos y Materiales Avanzados, Departamento de Procesos Industriales, Facultad de Ingeniería, Universidad Católica de Temuco, Temuco, Chile
| | - Adrián J. Hernández Arias
- Núcleo de Investigación en Producción Alimentaria, Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco, Chile
| | - Patricio Dantagnan
- Núcleo de Investigación en Producción Alimentaria, Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco, Chile
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16
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Rambabu K, Avornyo A, Gomathi T, Thanigaivelan A, Show PL, Banat F. Phycoremediation for carbon neutrality and circular economy: Potential, trends, and challenges. BIORESOURCE TECHNOLOGY 2023; 367:128257. [PMID: 36343781 DOI: 10.1016/j.biortech.2022.128257] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 06/16/2023]
Abstract
Phycoremediation is gaining attention not only as a pollutant mitigation approach but also as one of the most cost-effective paths to achieve carbon neutrality. When compared to conventional treatment methods, phycoremediation is highly effective in removing noxious substances from wastewater and is inexpensive, eco-friendly, abundantly available, and has many other advantages. The process results in valuable bioproducts and bioenergy sources combined with pollutants capture, sequestration, and utilization. In this review, microalgae-based phycoremediation of various wastewaters for carbon neutrality and circular economy is analyzed scientometrically. Different mechanisms for pollutants removal and resource recovery from wastewaters are explained. Further, critical parameters that influence the engineering design and phycoremediation performance are described. A comprehensive knowledge map highlighting the microalgae potential to treat a variety of industrial effluents is also presented. Finally, challenges and future prospects for industrial implementation of phycoremediation towards carbon neutrality coupled with circular economy are discussed.
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Affiliation(s)
- K Rambabu
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - Amos Avornyo
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - T Gomathi
- Biomaterials Research Lab, Department of Chemistry, DKM College for Women (Autonomous), Vellore, India
| | - A Thanigaivelan
- Center for Membranes and Advanced Water Technology (CMAT), Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty Science and Engineering, University of Nottingham, Malaysia, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
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17
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Huang X, Nong X, Liang K, Chen P, Zhao Y, Jiang D, Xiong J. Efficient Mn(II) removal mechanism by Serratia marcescens QZB-1 at high manganese concentration. Front Microbiol 2023; 14:1150849. [PMID: 37180235 PMCID: PMC10172493 DOI: 10.3389/fmicb.2023.1150849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 04/11/2023] [Indexed: 05/16/2023] Open
Abstract
Manganese (Mn(II)) pollution has recently increased and requires efficient remediation. In this study, Serratia marcescens QZB-1, isolated from acidic red soil, exhibited high tolerance against Mn(II) (up to 364 mM). Strain QZB-1 removed a total of 98.4% of 18 mM Mn(II), with an adsorption rate of 71.4% and oxidation rate of 28.6% after incubation for 48 h. The strain synthesized more protein (PN) to absorb Mn(II) when stimulated with Mn(II). The pH value of the cultural medium continuously increased during the Mn(II) removal process. The product crystal composition (mainly MnO2 and MnCO3), Mn-O functional group, and element-level fluctuations confirmed Mn oxidation. Overall, strain QZB-1 efficiently removed high concentration of Mn(II) mainly via adsorption and showed great potential for manganese wastewater removal.
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Affiliation(s)
- Xuejiao Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
- Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning, China
- *Correspondence: Xuejiao Huang,
| | - Xiaofang Nong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Kang Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Pengling Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Yi Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Daihua Jiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Jianhua Xiong
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi, China
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18
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Lipid accumulation by a novel microalga Parachlorella kessleri R-3 with wide pH tolerance for promising biodiesel production. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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19
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Geng W, Xiao X, Zhang L, Ni W, Li N, Li Y. Response and tolerance ability of Chlorella vulgaris to cadmium pollution stress. ENVIRONMENTAL TECHNOLOGY 2022; 43:4391-4401. [PMID: 34278946 DOI: 10.1080/09593330.2021.1950841] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
Cadmium, which is widely used in electroplating industry, chemical industry, electronic industry and nuclear industry, is harmful to human health and ecological environment. The effects of Cd at different initial concentrations on biomass, antioxidant enzyme activity and ultrastructure of Chlorella vulgaris were analysed in the present study. The results showed that C. vulgaris maintained a slow-growth trend at 3.0 mg/L Cd, and the peroxidase (POD) enzyme activity reached the highest at this concentration, which indicated that C. vulgaris could resist the oxidative damage of cells by increasing the enzyme activity, so as to improve the tolerance of C. vulgaris to Cd. When the concentration of Cd was 5.0 mg/L, although the activity of the superoxide dismutase enzyme was still very high, POD enzyme could not remove the hydrogen peroxide produced in cells in time, leading to cell damage and even death. Therefore, when the concentration reached 5.0 mg/L, the growth of C. vulgaris began to decline after four days of stress, and the cell structure was significantly damaged after six days of stress. And the higher concentration of Cd caused more Cd accumulation in cells and a serious damage to C. vulgaris. C. vulgaris can be used as an early warning indicator of Cd pollution, and it can be used for bioremediation of Cd contaminated water through tolerant subculture.
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Affiliation(s)
- Weiwei Geng
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Xinfeng Xiao
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Linlin Zhang
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Weiming Ni
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Na Li
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Yanjun Li
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, People's Republic of China
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20
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Chan SS, Low SS, Chew KW, Ling TC, Rinklebe J, Juan JC, Ng EP, Show PL. Prospects and environmental sustainability of phyconanotechnology: A review on algae-mediated metal nanoparticles synthesis and mechanism. ENVIRONMENTAL RESEARCH 2022; 212:113140. [PMID: 35314164 DOI: 10.1016/j.envres.2022.113140] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/13/2022] [Accepted: 03/16/2022] [Indexed: 06/14/2023]
Abstract
In recent years, researchers have proven that the employment of natural green components in the biogenesis of nanoparticles from microalgae species is one of the ways to delight the global environment issues. The application of nanotechnology with the exploitation of phycochemical produced from algae species is known as 'phyconanotechnology'. The use of biological compounds by microalgae as reducing agents for the synthesis of inorganic nanoparticles has shown promising results such as cost-effective and environmentally friendly. Different classifications of algae such as brown algae, red algae, green algae, and cyanobacteria are studied for the synthesis of different types of metal nanoparticles. It is also an important motive to acknowledge the mechanisms of the microalgae-mediated biosynthesis of nanoparticles via an intracellular pathway or extracellular pathway. Besides, microalgae species as biogenic sources preclude the use of conventional methods reagents, such as sodium borohydride (NaBH4) and N,N-dimethylformamide (DMF), which further consolidates their position as the best choice for sustainable (economically and environmentally) nanoparticle synthesis compared to the conventional nanoparticles synthesis pathway.
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Affiliation(s)
- Sook Sin Chan
- Institut Sains Biologi, Fakulti Sains, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Sze Shin Low
- Research Centre of Life Science and HealthCare, China Beacons Institute, University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo, 315100, Zhejiang, China
| | - Kit Wayne Chew
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900, Sepang, Selangor Darul Ehsan, Malaysia; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China
| | - Tau Chuan Ling
- Institut Sains Biologi, Fakulti Sains, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany
| | - Joon Ching Juan
- Nanotechnology & Catalysis Research Centre (NANOCAT), Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Faculty of Engineering, Technology and Built Environment, UCSI University, Cheras, 56000, Kuala Lumpur, Malaysia
| | - Eng Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, 11800, Penang, Malaysia
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia.
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21
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Maqsood Q, Hussain N, Mumtaz M, Bilal M, Iqbal HMN. Novel strategies and advancement in reducing heavy metals from the contaminated environment. Arch Microbiol 2022; 204:478. [PMID: 35831495 DOI: 10.1007/s00203-022-03087-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/20/2022] [Indexed: 11/27/2022]
Abstract
The most contemporary ecological issues are the dumping of unprocessed factories' effluent. As a result, there is an increasing demand for creative, practical, environmentally acceptable, and inexpensive methodologies to remediate inorganic metals (Hg, Cr, Pb, and Cd) liquidated into the atmosphere, protecting ecosystems. Latest innovations in biological metals have driven natural treatment as a viable substitute for traditional approaches in this area. To eliminate pesticide remains from soil/water sites, technologies such as oxidation, burning, adsorption, and microbial degradation have been established. Bioremediation is a more cost-effective and ecologically responsible means of removing heavy metals than conventional alternatives. As a result, microorganisms have emerged as a necessary component of methyl breakdown and detoxification via metabolic reactions and hereditary characteristics. The utmost operative variant for confiscating substantial metals commencing contaminated soil was A. niger, which had a maximum bioaccumulation efficiency of 98% (Cd) and 43% (Cr). Biosensor bacteria are both environmentally sustainable and cost-effective. As a result, microbes have a range of metal absorption processes that allow them to have higher metal biosorption capabilities. Additionally, the biosorption potential of bacterium, fungus, biofilm, and algae, inherently handled microorganisms that immobilized microbial cells for the elimination of heavy metals, was reviewed in this study. Furthermore, we discuss some of the challenges and opportunities associated with producing effective heavy metal removal techniques, such as those that employ different types of nanoparticles.
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Affiliation(s)
- Quratulain Maqsood
- Centre for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Nazim Hussain
- Centre for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Mehvish Mumtaz
- Centre for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huai'an, 223003, China.
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, 64849, Monterrey, Mexico.
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22
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Perera IA, Abinandan S, Subashchandrabose SR, Venkateswarlu K, Cole N, Naidu R, Megharaj M. Extracellular Polymeric Substances Drive Symbiotic Interactions in Bacterial‒Microalgal Consortia. MICROBIAL ECOLOGY 2022; 83:596-607. [PMID: 34132846 DOI: 10.1007/s00248-021-01772-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 05/10/2021] [Indexed: 06/12/2023]
Abstract
The importance of several factors that drive the symbiotic interactions between bacteria and microalgae in consortia has been well realised. However, the implication of extracellular polymeric substances (EPS) released by the partners remains unclear. Therefore, the present study focused on the influence of EPS in developing consortia of a bacterium, Variovorax paradoxus IS1, with a microalga, Tetradesmus obliquus IS2 or Coelastrella sp. IS3, all isolated from poultry slaughterhouse wastewater. The bacterium increased the specific growth rates of microalgal species significantly in the consortia by enhancing the uptake of nitrate (88‒99%) and phosphate (92‒95%) besides accumulating higher amounts of carbohydrates and proteins. The EPS obtained from exudates, collected from the bacterial or microalgal cultures, contained numerous phytohormones, vitamins, polysaccharides and amino acids that are likely involved in interspecies interactions. The addition of EPS obtained from V. paradoxus IS1 to the culture medium doubled the growth of both the microalgal strains. The EPS collected from T. obliquus IS2 significantly increased the growth of V. paradoxus IS1, but there was no apparent change in bacterial growth when it was cultured in the presence of EPS from Coelastrella sp. IS3. These observations indicate that the interaction between V. paradoxus IS1 and T. obliquus IS2 was mutualism, while commensalism was the interaction between the bacterial strain and Coelastrella sp. IS3. Our present findings thus, for the first time, unveil the EPS-induced symbiotic interactions among the partners involved in bacterial‒microalgal consortia.
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Affiliation(s)
- Isiri Adhiwarie Perera
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW, 2308, Australia
| | - Sudharsanam Abinandan
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW, 2308, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia
| | - Suresh R Subashchandrabose
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW, 2308, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, 515003, India
| | - Nicole Cole
- Analytical and Biomolecular Research Facility (ABRF), The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW, 2308, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW, 2308, Australia.
- Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW, 2308, Australia.
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23
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Abinandan S, Venkateswarlu K, Megharaj M. Phenotypic changes in microalgae at acidic pH mediate their tolerance to higher concentrations of transition metals. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 2:100081. [PMID: 35028626 PMCID: PMC8714768 DOI: 10.1016/j.crmicr.2021.100081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/22/2021] [Accepted: 11/06/2021] [Indexed: 11/25/2022] Open
Abstract
Acid-tolerant microalgae were grown at pH 3.5 and 6.7 in presence of heavy metals (HMs). HMs-induced phenotypic changes in microalgae were evaluated by ATR-FTIR spectroscopy. Higher HMs bioavailability affected microalgae more at pH 6.7 than pH 3.5. Acclimation of microalgal strains to acidic pH significantly alleviates HMs toxicity.
Acclimatory phenotypic response is a common phenomenon in microalgae, particularly during heavy metal stress. It is not clear so far whether acclimating to one abiotic stressor can alleviate the stress imposed by another abiotic factor. The intent of the present study was to demonstrate the implication of acidic pH in effecting phenotypic changes that facilitate microalgal tolerance to biologically excess concentrations of heavy metals. Two microalgal strains, Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3, were exposed to biologically excess concentrations of Cu (0.50 and 1.0 mg L‒1), Fe (5 and 10 mg L‒1), Mn (5 and 10 mg L‒1) and Zn (2, 5 and 10 mg L‒1) supplemented to the culture medium at pH 3.5 and 6.7. Chlorophyll autofluorescence and biochemical fingerprinting using FTIR-spectroscopy were used to assess the microalgal strains for phenotypic changes that mediate tolerance to metals. Both the strains responded to acidic pH by effecting differential changes in biochemicals such as carbohydrates, proteins, and lipids. Both the microalgal strains, when acclimated to low pH of 3.5, exhibited an increase in protein (< 2-fold) and lipid (> 1.5-fold). Strain MAS1 grown at pH 3.5 showed a reduction (1.5-fold) in carbohydrates while strain MAS3 exhibited a 17-fold increase in carbohydrates as compared to their growth at pH 6.7. However, lower levels of biologically excess concentrations of the selected transition metals at pH 6.7 unveiled positive or no effect on physiology and biochemistry in microalgal strains, whereas growth with higher metal concentrations at this pH resulted in decreased chlorophyll content. Although the bioavailability of free-metal ions is higher at pH 3.5, as revealed by Visual MINTEQ model, no adverse effect was observed on chlorophyll content in cells grown at pH 3.5 than at pH 6.7. Furthermore, increasing concentrations of Fe, Mn and Zn significantly upregulated the carbohydrate metabolism, but not protein and lipid synthesis, in both strains at pH 3.5 as compared to their growth at pH 6.7. Overall, the impact of pH 3.5 on growth response suggested that acclimation of microalgal strains to acidic pH alleviates metal toxicity by triggering physiological and biochemical changes in microalgae for their survival.
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Affiliation(s)
- Sudharsanam Abinandan
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW 2308, Australia
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, 515003, India
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW 2308, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia
- Corresponding author at: Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, ATC Building, University Drive, Callaghan, NSW 2308, Australia.
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24
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Wang L, Liu J, Filipiak M, Mungunkhuyag K, Jedynak P, Burczyk J, Fu P, Malec P. Fast and efficient cadmium biosorption by Chlorella vulgaris K-01 strain: The role of cell walls in metal sequestration. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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25
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Goswami RK, Agrawal K, Shah MP, Verma P. Bioremediation of heavy metals from wastewater: a current perspective on microalgae-based future. Lett Appl Microbiol 2021; 75:701-717. [PMID: 34562022 DOI: 10.1111/lam.13564] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/23/2021] [Accepted: 08/27/2021] [Indexed: 11/30/2022]
Abstract
Heavy metals-containing drinking water and wastewater are posing a severe threat to the environment, and living beings on land, air and water. Different conventional, advanced nanomaterials-based and biological method has been employed for the treatment of heavy metals. Among the biological methods, microalgae are an important group of micro-organisms that have numerous environmental applications and can remediate heavy metals from wastewater. Also, it has numerous advantages over conventional remediation processes. Microalgae cells can uptake the heavy metal via different physiological and biological methods and are utilized as a nutrient source to regulate its metabolic process for the production of biomass. Furthermore, the enhancement in heavy metal removal efficiency can be improved using different strategies such as immobilization of algal cells, development of algal consortia and designing of microalgae-based nanocomposite materials. Also, it can significantly contribute towards environmental sustainability and future. Thus, the review provides a critical overview of heavy metals and their existence along with their negative effects on humans. This review provides insight on recent advanced nanomaterial approaches for the removal of heavy metals, overviews of microalgae-based heavy metal uptake mechanisms and their potential for the amputation of different heavy metals. Furthermore, the special focus is on recent strategies that enhance heavy metal removal efficiency and contribute towards sustainability for the development of a microalgae-based future.
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Affiliation(s)
- R K Goswami
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, Ajmer, Rajasthan, India
| | - K Agrawal
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, Ajmer, Rajasthan, India
| | - M P Shah
- Industrial Waste Water Research, Division of Applied and Environmental Microbiology, Environment Technology Ltd, Ankleshwar, Gujarat, India
| | - P Verma
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, Ajmer, Rajasthan, India
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26
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Tripathi S, Poluri KM. Heavy metal detoxification mechanisms by microalgae: Insights from transcriptomics analysis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 285:117443. [PMID: 34090077 DOI: 10.1016/j.envpol.2021.117443] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 05/07/2021] [Accepted: 05/20/2021] [Indexed: 05/20/2023]
Abstract
Heavy metal pollution in ecosystem is a global threat. The associated toxicity and carcinogenic nature of heavy metals/metalloids such as mercury, cadmium, lead, and arsenic are imposing a severe risk to both ecological diversity and human lives. Harnessing the adaptive feature of microalgae for remediating toxic heavy metal has reached a milestone in past few decades. Transcriptomics analyses have provided mechanistic insights to map the dynamics of cellular events under heavy metal stress, thus deciphering the strategic responses of microalgae. Here, the present review comprehensively addresses the elicited molecular responses of microalgae to detoxify the heavy metal stress. The review highlights the intricate role of biochemical components and signaling networks mediating stress responsive transitions of microalgae at physiological level. Furthermore, the differential gene expression signifying the transporters involved in uptake, distribution/sequestration, and efflux of heavy metal has also been reviewed. In a nutshell, this study provided a comprehensive understanding of the molecular mechanisms adopted by microalgae at transcriptome level to nullify the oxidative stress while detoxifying the heavy metals.
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Affiliation(s)
- Shweta Tripathi
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Krishna Mohan Poluri
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India; Centre for Transportation Systems, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India.
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27
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Abstract
As a by-product from the metallurgical industry, steel slag contains a large amount of metal elements. In many developing countries, the output of steel slag is huge and the comprehensive utilization rate is low, hence the development of a novel application method for steel slag is of great significance to increase its utilization rate to improve the environment. This paper reviewed the dissolution behavior of Fe, P, Ca and silicate of steel slag under seawater and acidic solutions as an application in the cultivation of different microalgae, such as diatoms, spirulina, and chlorella. This review clarifies that proper pre-treatment of steel slag can effectively increase the dissolved elements of steel slag in the solution and provide more nutrients for the growth of microalgae. Microalgae cultivated with steel slag as a nutrient can be used to produce biodiesel which has a very broad application prospects for cleaner production and environmental protection.
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Perera IA, Abinandan S, R Subashchandrabose S, Venkateswarlu K, Naidu R, Megharaj M. Microalgal-bacterial consortia unveil distinct physiological changes to facilitate growth of microalgae. FEMS Microbiol Ecol 2021; 97:6105210. [PMID: 33476378 DOI: 10.1093/femsec/fiab012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/19/2021] [Indexed: 01/05/2023] Open
Abstract
Physiological changes that drive the microalgal-bacterial consortia are poorly understood so far. In the present novel study, we initially assessed five morphologically distinct microalgae for their ability in establishing consortia in Bold's basal medium with a bacterial strain, Variovorax paradoxus IS1, all isolated from wastewaters. Tetradesmus obliquus IS2 and Coelastrella sp. IS3 were further selected for gaining insights into physiological changes, including those of metabolomes in consortia involving V. paradoxus IS1. The distinct parameters investigated were pigments (chlorophyll a, b, and carotenoids), reactive oxygen species (ROS), lipids and metabolites that are implicated in major metabolic pathways. There was a significant increase (>1.2-fold) in pigments, viz., chlorophyll a, b and carotenoids, decrease in ROS and an enhanced lipid yield (>2-fold) in consortia than in individual cultures. In addition, the differential regulation of cellular metabolites such as sugars, amino acids, organic acids and phytohormones was distinct among the two microalgal-bacterial consortia. Our results thus indicate that the selected microalgal strains, T. obliquus IS2 and Coelastrella sp. IS3, developed efficient consortia with V. paradoxus IS1 by effecting the required physiological changes, including metabolomics. Such microalgal-bacterial consortia could largely be used in wastewater treatment and for production of value-added metabolites.
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Affiliation(s)
- Isiri Adhiwarie Perera
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, ATC Building, Callaghan, NSW 2308, Australia
| | - Sudharsanam Abinandan
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, ATC Building, Callaghan, NSW 2308, Australia.,Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW 2308, Australia
| | - Suresh R Subashchandrabose
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, ATC Building, Callaghan, NSW 2308, Australia
| | - Kadiyala Venkateswarlu
- Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu 515003, Andhra Pradesh, India
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, ATC Building, Callaghan, NSW 2308, Australia.,Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW 2308, Australia
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, ATC Building, Callaghan, NSW 2308, Australia.,Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, ATC Building, Callaghan, NSW 2308, Australia
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29
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Abinandan S, Perera IA, Subashchandrabose SR, Venkateswarlu K, Cole N, Megharaj M. Acid-adapted microalgae exhibit phenotypic changes for their survival in acid mine drainage samples. FEMS Microbiol Ecol 2021; 96:5851742. [PMID: 32501474 DOI: 10.1093/femsec/fiaa113] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 06/04/2020] [Indexed: 01/01/2023] Open
Abstract
Phenotypic plasticity or genetic adaptation in an organism provides phenotypic changes when exposed to the extreme environmental conditions. The resultant physiological and metabolic changes greatly enhance the organism's potential for its survival in such harsh environments. In the present novel approach, we tested the hypothesis whether acid-adapted microalgae, initially isolated from non-acidophilic environments, can survive and grow in acid-mine-drainage (AMD) samples. Two acid-adapted microalgal strains, Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3, were tested individually or in combination (co-culture) for phenotypic changes during their growth in samples collected from AMD. The acid-adapted microalgae in AMD exhibited a two-fold increase in growth when compared with those grown at pH 3.5 in BBM up to 48 h and then declined. Furthermore, oxidative stress triggered several alterations such as increased cell size, granularity, and enhanced lipid accumulation in AMD-grown microalgae. Especially, the apparent limitation of phosphate in AMD inhibited the uptake of copper and iron in the cultures. Interestingly, growth of the acid-adapted microalgae in AMD downregulated amino acid metabolic pathways as a survival mechanism. This study demonstrates for the first time that acid-adapted microalgae can survive under extreme environmental conditions as exist in AMD by effecting significant phenotypic changes.
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Affiliation(s)
- Sudharsanam Abinandan
- Global Centre for Environmental Remediation (GCER), Faculty of Science, ATC Building, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
| | - Isiri Adhiwarie Perera
- Global Centre for Environmental Remediation (GCER), Faculty of Science, ATC Building, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
| | - Suresh R Subashchandrabose
- Global Centre for Environmental Remediation (GCER), Faculty of Science, ATC Building, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.,Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), University of Newcastle, ATC Building, University Drive, Callaghan, NSW 2308 Australia
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu 515003, India
| | - Nicole Cole
- Analytical and Biomolecular Research Facility (ABRF), University of Newcastle, University Drive, Callaghan, NSW 2308 Australia
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), Faculty of Science, ATC Building, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.,Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), University of Newcastle, ATC Building, University Drive, Callaghan, NSW 2308 Australia
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30
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Maddela NR, Kakarla D, García LC, Chakraborty S, Venkateswarlu K, Megharaj M. Cocoa-laden cadmium threatens human health and cacao economy: A critical view. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 720:137645. [PMID: 32146410 DOI: 10.1016/j.scitotenv.2020.137645] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 02/10/2020] [Accepted: 02/28/2020] [Indexed: 06/10/2023]
Abstract
In the recent decades, Cd burden in cocoa-based products threatened global food safety, human health and the future of chocolateries. Increased Cd bioavailability is an acute problem in cacao-based horticulture. Poverty, poor maintenance, unjustified traditional farming, and paucity of knowledge on Cd-binding propensity in cacao discourage the application of risk-mitigation measures. Progressive accumulation of Cd, with a half-life of 10-30 years, in the human body even at ultra-trace levels may lead to serious health complications. If Cd accumulates in the food chain through cocoa products, consequences in children, who are the primary consumers of chocolates, include morbidity and mortality that may result in a significant demographic transition by the year 2050. Developing cacao clones with an innate capability of taking up low Cd levels from soils, and site-specific Cd-cacao research might contribute to limiting the trophic transfer of Cd. This review highlights the possible routes for Cd uptake in cacao plants and discusses the measures to rescue the chocolateries from Cd pollution to promote "healthy" cacao farming. The potential human health risks of chocolate-laden Cd and mitigation strategies to minimize Cd burden in the human body are also presented. The challenges and prospects in Cd-cacao research are discussed as well.
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Affiliation(s)
- Naga Raju Maddela
- Instituto de Investigación, Universidad Técnica de Manabí, Portoviejo 130105, Ecuador; Facultad la Ciencias la Salud, Universidad Técnica de Manabí, Portoviejo 130105, Ecuador
| | - Dhatri Kakarla
- University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Luz Cecilia García
- Instituto de Investigación, Universidad Técnica de Manabí, Portoviejo 130105, Ecuador; Facultad de Agronomía, Universidad Técnica de Manabí, Portoviejo 130105, Ecuador
| | - Sagnik Chakraborty
- Hebei University of Technology, School of Energy & Environmental Engineering, Beichen, Tianjin, PR China
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu 515003, India
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia.
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31
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Zhu QL, Bao J, Liu J, Zheng JL. High salinity acclimatization alleviated cadmium toxicity in Dunaliella salina: Transcriptomic and physiological evidence. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2020; 223:105492. [PMID: 32361487 DOI: 10.1016/j.aquatox.2020.105492] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 03/29/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
In the present study, we tested the hypothesis that high salinity acclimatization can mitigate cadmium (Cd) toxicity in the microalga Dunaliella salina. To this end, microalgal cells were subjected to high salinity (60 g/L) for 12 weeks until the growth rate remained stable between generations and were then exposed to 2.5 mg/L of Cd for 4 days. Acute Cd toxicity impaired cell growth by increasing Cd bioaccumulation and lipid peroxidation, which reduced cellular pigment, total protein, and glutathione content. It also significantly weakened photosynthetic efficiency and total antioxidant capacity. However, acclimatization to high salinity alleviated these negative effects under Cd stress. To understand the potential mechanisms behind this phenomenon, 12 cDNA libraries from control, Cd-exposed (Cd), high salinity-acclimated (Salinity), and high salinity-acclimated with Cd exposure (Salinity + Cd) cells were derived using RNA sequencing. A total of 2019, 1799, 2150 and 1256 differentially expressed genes (DEGs) were identified from sample groups Salinity / Control, Cd / Control, Salinity + Cd / Control, and Salinity + Cd / Cd, respectively. Some of these DEGs were significantly enriched in ribosome, photosynthesis, stress defense, and photosynthesis-antenna proteins. Among these genes, 82 ribosomal genes were up-regulated in Salinity / Control (corrected P = 3.8 × 10-28), while 81 were down-regulated in Cd / Control (corrected P = 1.1 × 10-24). Moreover, high salinity acclimatization up-regulated 8 photosynthesis genes and 18 stress defense genes compared with the control. Additionally, 3 photosynthesis genes, 11 stress defense genes and 11 genes encoding light harvesting proteins were up-regulated by high salinity acclimatization under Cd exposure. Overall, high salinity acclimatization mitigated Cd toxicity, possibly by up-regulating the transcription of photosynthesis, stress defense, and ribosomal genes. These results provide new insights on cross-tolerance in microalgae.
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Affiliation(s)
- Qing-Ling Zhu
- Institute of Marine Biology & Pharmacology, Ocean College, Zhejiang University, 1 Zheda Road, Dinghai District, Zhoushan, 316000, Zhejiang, PR China; College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Jingjing Bao
- Institute of Marine Biology & Pharmacology, Ocean College, Zhejiang University, 1 Zheda Road, Dinghai District, Zhoushan, 316000, Zhejiang, PR China
| | - Jianhua Liu
- Institute of Marine Biology & Pharmacology, Ocean College, Zhejiang University, 1 Zheda Road, Dinghai District, Zhoushan, 316000, Zhejiang, PR China; College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, PR China.
| | - Jia-Lang Zheng
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China.
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Leong YK, Chang JS. Bioremediation of heavy metals using microalgae: Recent advances and mechanisms. BIORESOURCE TECHNOLOGY 2020; 303:122886. [PMID: 32046940 DOI: 10.1016/j.biortech.2020.122886] [Citation(s) in RCA: 234] [Impact Index Per Article: 58.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 05/22/2023]
Abstract
Five heavy metals namely, arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb) and mercury (Hg) are carcinogenic and show toxicity even at trace amounts, posing threats to environmental ecology and human health. There is an emerging trend of employing microalgae in phycoremediation of heavy metals, due to several benefits including abundant availability, inexpensive, excellent metal removal efficiency and eco-friendly nature. This review presents the recent advances and mechanisms involved in bioremediation and biosorption of these toxic heavy metals utilizing microalgae. Tolerance and response of different microalgae strains to heavy metals and their bioaccumulation capability with value-added by-products formation as well as utilization of non-living biomass as biosorbents are discussed. Furthermore, challenges and future prospects in bioremediation of heavy metals by microalgae are also explored. This review aims to provide useful insights to help future development of efficient and commercially viable technology for microalgae-based heavy metal bioremediation.
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Affiliation(s)
- Yoong Kit Leong
- Department of Chemical and Materials Engineering, College of Engineering, Tunghai University, Taichung, Taiwan
| | - Jo-Shu Chang
- Department of Chemical and Materials Engineering, College of Engineering, Tunghai University, Taichung, Taiwan; Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan; Center for Nanotechnology, Tunghai University, Taichung, Taiwan.
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Abinandan S, Subashchandrabose SR, Venkateswarlu K, Megharaj M. Sustainable Iron Recovery and Biodiesel Yield by Acid-Adapted Microalgae, Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3, Grown in Synthetic Acid Mine Drainage. ACS OMEGA 2020; 5:6888-6894. [PMID: 32258924 PMCID: PMC7114686 DOI: 10.1021/acsomega.0c00255] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 03/09/2020] [Indexed: 05/17/2023]
Abstract
Sustainable resource recovery is the key to manage the overburden of various waste entities of mining practices. The present study demonstrates for the first time a novel approach for iron recovery and biodiesel yield from two acid-adapted microalgae, Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3, grown in synthetic acid mine drainage (SAMD). Virtually, there was no difference in the growth of the strain MAS3 both in Bold's basal medium (control) and SAMD. Using the IC50 level (200 mg L-1) and a lower concentration (50 mg L-1) of iron in SAMD, the cell granularity, exopolysaccharide (EPS) secretion, iron recovery, and biodiesel were assessed in both the strains. Both cell granularity and accumulation of EPS were significantly altered under metal stress in SAMD, resulting in an increase in total accumulation of iron. Growth of the microalgal strains in SAMD yielded 12-20% biodiesel, with no traces of heavy metals, from the biomass. The entire amount of iron, accumulated intracellularly, was recovered in the residual biomass. Our results on the ability of the acid-adapted microalgal strains in iron recovery and yield of biodiesel when grown in SAMD indicate that they could be the potential candidates for use in bioremediation of extreme habitats like AMD.
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Affiliation(s)
- Sudharsanam Abinandan
- Global
Centre for Environmental Remediation (GCER), Faculty of Science, University of Newcastle, ATC Building, Callaghan, New South Wales 2308, Australia
| | - Suresh R. Subashchandrabose
- Global
Centre for Environmental Remediation (GCER), Faculty of Science, University of Newcastle, ATC Building, Callaghan, New South Wales 2308, Australia
- Cooperative
Research Centre for Contamination Assessment and Remediation of Environment
(CRC CARE), University of Newcastle, ATC Building, Callaghan, New South Wales 2308, Australia
| | - Kadiyala Venkateswarlu
- Formerly
Department of Microbiology, Sri Krishnadevaraya
University, Anantapuramu 515003, India
| | - Mallavarapu Megharaj
- Global
Centre for Environmental Remediation (GCER), Faculty of Science, University of Newcastle, ATC Building, Callaghan, New South Wales 2308, Australia
- Cooperative
Research Centre for Contamination Assessment and Remediation of Environment
(CRC CARE), University of Newcastle, ATC Building, Callaghan, New South Wales 2308, Australia
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Chen Z, Qiu S, Amadu AA, Shen Y, Wang L, Wu Z, Ge S. Simultaneous improvements on nutrient and Mg recoveries of microalgal bioremediation for municipal wastewater and nickel laterite ore wastewater. BIORESOURCE TECHNOLOGY 2020; 297:122517. [PMID: 31830719 DOI: 10.1016/j.biortech.2019.122517] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/27/2019] [Accepted: 11/28/2019] [Indexed: 06/10/2023]
Abstract
Effects of different mixing ratios between synthetic municipal wastewater (MW) and magnesium (Mg2+)-enriched nickel laterite ore wastewater (NLOWW) on growth of Chlorella sorokiniana (C. sorokiniana), photosynthetic activities, cellular biocomposition, nutrient and Mg2+ removal were investigated in photobioreactors. In the culture without NLOWW, wrinkled cells were observed with low biomass production. The culture mixed with 0.13% NLOWW obtained 1.89-fold higher biomass yield, 3.77-fold enhanced photosynthetic activity (Fv/Fm value), and improved nutrient removal (nitrogen by 102.2%, phosphorus by 39.3%). However, excessive Mg2+ at 100% NLOWW produced highest reactive oxygen species suppressing microalgal growth. The Mg2+ removal capacity increased with NLOWW loading. Moreover, microalgal assimilation primarily contributed to nutrient removal while absorption was the dominant Mg2+ removal pathway. Carbohydrate content in biomass increased with Mg2+ loading. Finally, the approach for MW/NLOWW treatment was demonstrated as economically feasible with revenue of $75.6 per kilogram biomass through a comprehensive economic model.
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Affiliation(s)
- Zhipeng Chen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Shuang Qiu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Ayesha Algade Amadu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Yeting Shen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Lingfeng Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Zhengshuai Wu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Shijian Ge
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China.
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Zhao Y, Song X, Zhong DB, Yu L, Yu X. γ-Aminobutyric acid (GABA) regulates lipid production and cadmium uptake by Monoraphidium sp. QLY-1 under cadmium stress. BIORESOURCE TECHNOLOGY 2020; 297:122500. [PMID: 31796380 DOI: 10.1016/j.biortech.2019.122500] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/19/2019] [Accepted: 11/25/2019] [Indexed: 06/10/2023]
Abstract
This study explored the effects of γ-aminobutyric acid (GABA) on the production of biomass and lipids and on the uptake of Cd2+ by microalgae under cadmium (Cd) stress. Compared with the control and Cd stress alone, 2.5 mM GABA increased the maximum lipid content (55.37%) by 49.37% and 9.42%, respectively. GABA application resulted in increased contents of protein and glutathione (GSH) and in upregulated activity of α-amylase but decreased contents of starch, reactive oxygen species (ROS) and Cd2+, with no effect on subsequent biodiesel quality. Additional analysis of GABA further indicated that increased cellular GABA contents could promote lipid synthesis and reduce Cd accumulation by regulating the expression levels of lipogenesis genes, ROS signalling and mineral nutrient uptake under Cd stress. Collectively, these findings show that GABA not only increases lipid production in microalgae but also is involved in the mechanisms by which microalgae respond to Cd stress.
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Affiliation(s)
- Yongteng Zhao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Xueting Song
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Du-Bo Zhong
- Yunnan Yunce Quality Testing Co., Ltd, Kunming 650217, China
| | - Lei Yu
- College of Agronomy and Life Science, Yunnan Urban Agricultural Engineering & Technological Research Center, Kunming University, Kunming 650214, China
| | - Xuya Yu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
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