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Ferreira N, Viana T, Henriques B, Tavares DS, Jacinto J, Colónia J, Pinto J, Pereira E. Application of response surface methodology and box-behnken design for the optimization of mercury removal by Ulva sp. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130405. [PMID: 36437192 DOI: 10.1016/j.jhazmat.2022.130405] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 10/26/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
Mercury (Hg) is a global and top priority contaminant, toxic at low concentrations. Although it has been progressively eliminated from processes, this metal continues to circulate in the atmosphere, soil, and water. In this work, the Response Surface Methodology (RSM) combined with a Box-Behnken Design (3 factors - 3 levels) was used to optimize key operational conditions that influence the removal and uptake of Hg by living macroalga Ulva sp. in a complex mixture containing several elements used in industry (potentially toxic elements, rare earth elements, and platinum-group elements) (initial concentration 10, 100 and 190 µg/L, salinity 15, 25 and 35, seaweed stock density 1.0, 3.0 and 5.0 g/L). Results evidenced the great capability of Ulva sp. to remove Hg, with removal efficiencies between 69 % and 97 %. 3-D surfaces showed that the most impactful variable was seaweed stock density, with higher densities leading to higher removal. Regarding the uptake, a positive correlation between initial concentration and qt values was observed. The appliance of RSM made possible to obtain optimal operating conditions for removing virtually 100 % of Hg from waters with high ionic strength, which is a pivotal step in the direction of the application of this remediation biotechnology at large scale.
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Affiliation(s)
- Nicole Ferreira
- LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Thainara Viana
- LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Bruno Henriques
- LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; Central Laboratory of Analysis, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Daniela S Tavares
- LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Jéssica Jacinto
- LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - João Colónia
- LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - João Pinto
- LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Eduarda Pereira
- LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; Central Laboratory of Analysis, University of Aveiro, 3810-193 Aveiro, Portugal
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Yasmin R, Zafar MS, Tahir IM, Asif R, Asghar S, Raza SK. Biosorptive Potential of Pseudomonas species RY12 Toward Zinc Heavy Metal in Agriculture Soil Irrigated with Contaminated Waste Water. Dose Response 2022; 20:15593258221117352. [PMID: 36052270 PMCID: PMC9425902 DOI: 10.1177/15593258221117352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 05/22/2022] [Accepted: 07/15/2022] [Indexed: 11/16/2022] Open
Abstract
Industrial waste is mainly responsible for accumulating Zn (II) in the soil, which needs to be removed to avoid its bioaccumulation and hazardous effects on the environment. In a recent study, the potential of the RY12 strain was evaluated as a biosorbent of Zn (II) ions in an aqueous medium. Different microbiological techniques like biochemical, molecular characterization, and 16S rRNA gene sequencing were used for the identification of RY12. The impact of different parameters such as the initial zinc ion concentration, pH, temperature, and the removal of other metals such as manganese, lead, cobalt, silver, copper, mercury, and chromium was also evaluated on the reduction of Zn (II). Fourier Transform Infrared spectroscopy (FTIR) was also carried out to investigate the role of cellular surfaces in the sorption of Zn+2 ions. Both biochemical and phylogenetic analyses established that strain RY12 Pseudomonas sp. capable of reducing Zn+2 up to 89% at 28°C (pH = 6.5; initial Zn+2 concentration = 200 mg/L). The FTIR analysis revealed that the bacterial cell wall’s amino, carboxyl, and phosphate groups were involved in the reaction with Zn (II). Our findings suggest that Pseudomonas sp. RY12 is a proficient bacterium for removing zinc from industrial waste and could be a valuable bioremediation agent.
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Affiliation(s)
- Riffat Yasmin
- Riphah College of Rehabilitation and Allied Health Sciences (RCRAHS), Riphah International University, Faisalabad, Pakistan
| | | | - Imtiaz Mahmood Tahir
- College of Allied Health Professionals, Government College University, Faisalabad, Pakistan
| | - Rizwan Asif
- Department of Eastern Medicine and Surgery, Qarshi University Lahore, Lahore, Pakistan
| | - Samra Asghar
- Riphah College of Rehabilitation and Allied Health Sciences (RCRAHS), Riphah International University, Faisalabad, Pakistan
| | - Syed Kashif Raza
- Riphah College of Rehabilitation and Allied Health Sciences (RCRAHS), Riphah International University, Faisalabad, Pakistan
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Vaid N, Sudan J, Dave S, Mangla H, Pathak H. Insight Into Microbes and Plants Ability for Bioremediation of Heavy Metals. Curr Microbiol 2022; 79:141. [PMID: 35320423 DOI: 10.1007/s00284-022-02829-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 03/04/2022] [Indexed: 01/07/2023]
Abstract
Contamination of ground and surface water, soil, and air by harmful and carcinogenic chemicals is one of the most prevalent problems in the modern industrialized world. Heavy metal toxicity has demonstrated to be paramount hazardous and there are various risks associated with it. In addition, these heavy metals have adverse effects on human health and plant physiology. The field of bioremediation has undergone an impactful revolution in recent years due to an exponential increase in various issues related to soil and water pollution. Bioremediation is an advanced and efficient technology, which involves the use of biological means such as microorganisms and plants to degrade heavy metal contaminants. Among the millions of microbes present in the ecosystem, the highest metal adsorption ability is possessed by species belonging to genus Penicillium, Streptomyces, Bacillus, Rhizopus, Chlorella, Ascophyllum, Sargassum, and Aspergillus. Among different plant species, Allium, Eucalyptus, Helianthus, and Hibiscus are the main heavy metal absorbers. The present review concentrates on the research in the bioremediation of important heavy metals through the use of plants and microbes.
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Affiliation(s)
- Nishtha Vaid
- Department of Plant Biotechnology, JECRC University, Jaipur, Rajasthan, India
| | - Jebi Sudan
- Department of Plant Biotechnology, JECRC University, Jaipur, Rajasthan, India
| | - Saurabh Dave
- Department of Chemistry, JECRC University, Jaipur, Rajasthan, India
| | - Himanshi Mangla
- Department of Plant Biotechnology, JECRC University, Jaipur, Rajasthan, India
| | - Hardik Pathak
- Department of Plant Biotechnology, JECRC University, Jaipur, Rajasthan, India.
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Rani L, Srivastav AL, Kaushal J. Bioremediation: An effective approach of mercury removal from the aqueous solutions. CHEMOSPHERE 2021; 280:130654. [PMID: 34162069 DOI: 10.1016/j.chemosphere.2021.130654] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 04/03/2021] [Accepted: 04/21/2021] [Indexed: 06/13/2023]
Abstract
Mercury (Hg(II)) is the 16th rarest element present in the earth's crust. Due to rapid industrialization and urban expansions, the mercury concentration has been elevated in the environment. Hg(II) contamination in the aqueous environment has become a great challenge for human beings. The main source of Hg(II) in the aqueous phase is untreated effluent industries (such as the paper industry). Hg(II) is non-biodegradable in nature and even its trace amount in an aqueous environment can pose chronic threats among the humans (damage to the central nervous system, respiratory system, and cardiovascular system, mutation of DNA), animals, and aquatic creatures. Therefore, the removal of mercury from aqueous solutions is an urgent need of the modern era. The conventional techniques such as ion exchange, precipitation, membrane filtrations are costly and also generate byproducts in the environment. Bioremediation is a sustainable, environmentally sound, and cost-effective technique to remove Hg(II) from the aqueous solutions. In this process, naturally occurring microorganisms are utilized to remove the Hg(II) from the aqueous solutions. Lentinus edodes, U. lactuca, and Typha domingensis are found to have great potential to remove mercury from water ranged from ~100 mg g-1 to 337 mg g-1.
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Affiliation(s)
- Lata Rani
- Centre for Water Sciences, Chitkara University Institute of Engineering & Technology, Chitkara University, Punjab, 140 417, India; School of Basic Sciences, Chitkara University, Himachal Pradesh, 174 103, India
| | - Arun Lal Srivastav
- Chitkara University School of Engineering and Technology, Chitkara University, Himachal Pradesh, 174 103, India.
| | - Jyotsna Kaushal
- Centre for Water Sciences, Chitkara University Institute of Engineering & Technology, Chitkara University, Punjab, 140 417, India
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Singh S, Kumar V, Gupta P, Ray M, Kumar A. The synergy of mercury biosorption through Brevundimonas sp. IITISM22: Kinetics, isotherm, and thermodynamic modeling. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125653. [PMID: 34088177 DOI: 10.1016/j.jhazmat.2021.125653] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/25/2021] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
This research experiment was conducted to investigate the potential of Brevundimonas species IITISM22 to remove mercury by using live biomass of bacterial cells at 298, 308, and 318 K. Characterization of bio-sorbent was done by FT-IR and SEM-EDX. The prime functional groups accountable for binding Hg were OH, -NH2, -CH, -SH and -COO. The deformed bacterial structure was seen after Hg adsorption over the bacterial cell. Influences of different experimental factors, such as pH, temperature, contact time, Hg concentration, and biomass dose was examined. IITISM22 exhibited the highest Hg absorption at pH 6.5, contact time of 4 h, and showed an increased adsorption capacity while increasing the concentration of Hg. Kinetics were recommended by pseudo-second-order for adsorption process and isotherm was adequately defined by the Linear Langmuir isotherm model (KL) = 1.4, 1.2, 0.9 mg/l; (RL) = 0.020, 0.015, 0.013, respectively than Freundlich isotherm model. The Activation energy (Ea) of biosorption calculated were (131.10 KJ/mole) by using Arrhenius equation, and the thermodynamic parameters were ΔG⸰ (-41.03, -16.33, -16.12 KJ/mol), ΔH⸰ (-36.87 KJ/mol) and ΔS⸰ (-194.03 J/mol), respectively. These findings suggest that the removal process was based on chemisorption and the biosorption was exothermic. The result of the current experiment indicated that the IITISM22 could be an authentic biosorbent for Hg detoxification.
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Affiliation(s)
- Shalini Singh
- Laboratory of Applied Microbiology, Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, Jharkhand, India
| | - Vipin Kumar
- Laboratory of Applied Microbiology, Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, Jharkhand, India.
| | - Pratishtha Gupta
- Laboratory of Applied Microbiology, Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, Jharkhand, India
| | - Madhurya Ray
- Laboratory of Applied Microbiology, Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, Jharkhand, India
| | - Ashok Kumar
- Department of Applied Chemistry, BBAU University (A Central University), Lucknow 226025, India
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Mukherjee S, Kamila B, Paul S, Hazra B, Chowdhury S, Halder G. Optimizing fluoride uptake influencing parameters of paper industry waste derived activated carbon. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105643] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Kumpanenko IV, Ivanova NA, Dyubanov MV, Skryl’nikov AM, Kovaleva NY, Roshchin AV. Removal of Mercury(II) from Aqueous Solutions via Dynamic Column Adsorption. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2019. [DOI: 10.1134/s1990793119030199] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lin G, Hu T, Wang S, Xie T, Zhang L, Cheng S, Fu L, Xiong C. Selective removal behavior and mechanism of trace Hg(II) using modified corn husk leaves. CHEMOSPHERE 2019; 225:65-72. [PMID: 30861384 DOI: 10.1016/j.chemosphere.2019.03.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/21/2019] [Accepted: 03/02/2019] [Indexed: 06/09/2023]
Abstract
Removal of Hg(II) from wastewater was beneficial to satisfy the discharge standards of China's mercury-containing wastewater (50 ppb). An adsorbent was prepared via modifying corn husk leaves with bismuthiol I. The results revealed that the mercury removal rate was more than 98.5% at pH 1.0-7.0. Moreover, the removal rate reached 96% at 5 min and the residual concentration decreased from 10 ppm to approximately 30 ppb. In addition, the adsorbent owned a conspicuous selective absorbability for trace Hg(II) from wastewater. The adsorption process followed a Hill isotherm model. The actual saturated adsorption quantity of the adsorbent was 707 mg/g. The repeatability experiment indicated that the mercury removal efficiency was still beyond 99% after three cycles. The X-ray photoelectron spectroscopy suggested that the main adsorption mechanism was chelation between nitrogen/sulfur groups and Hg(II). The adsorbent was hopeful to remove mercury from wastewater in a sustainability perspective.
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Affiliation(s)
- Guo Lin
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
| | - Tu Hu
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
| | - Shixing Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
| | - Tingfang Xie
- Yunnan Chihong Zn & Ge Co., Ltd, Qujing, PR China.
| | - Libo Zhang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
| | - Song Cheng
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
| | - Likang Fu
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
| | - Chao Xiong
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
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Sahayaraj K, Rajesh S, Rathi JAM, Kumar V. Green preparation of seaweed-based silver nano-liquid for cotton pathogenic fungi management. IET Nanobiotechnol 2019; 13:219-225. [PMID: 31051454 DOI: 10.1049/iet-nbt.2018.5007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Silver nanoparticles (Ag NPs) were synthesised using the crude ethyl acetate extracts of Ulva lactuca and evaluated their bioefficacy against two crop-damaging pathogens. The sets of lattice planes in the XRD spectrum for the Ag NPs were indexed to the 111, 200, 220 and 311 orientations and support the crystalline nature of the Ag NPs. The 3414 and 2968 cm-1 peaks were observed in crude algal thallus extract and they were characteristic of terpenoids. Further, a peak at 1389 cm-1 was observed as fatty acids. The marine macroalgae terpenoids and palmitic acid acted as reducing agent and stabiliser, respectively. The size (3 and 50 nm) and shape (spherical) of Ag NPs were recorded. The energy-dispersive X-ray spectroscopy analysis exemplified the presence of silver in its elemental nature. Moreover, U. lactuca Ag NPs were effective against two cotton phytopathogens namely Fusarium oxysporum f.sp. vasinfectum (FOV) and Xanthomonas campestris pv. malvacearum (XAM). The minimum inhibitory concentration was found to be 80.0 and 43.33 μg ml-1 against FOV and XAM, respectively. Results confirmed the anti-microbial activity of green nanoparticles against select pathogens and suggest their possible usage in developing antifungal agents for controlling destructive pathogens in a cotton agroecosystem.
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Affiliation(s)
- Kitherian Sahayaraj
- Crop Protection Research Centre, St. Xavier's College (Autonomous), Palayamkottai - 627002, Tamil Nadu, India.
| | - Sathyamourthy Rajesh
- Department of Plant Pathology and Microbiology, The Hebrew University of Jerusalem, 76100 Rehovot, Israel
| | | | - Vivek Kumar
- University of Florida, Mid-Florida Research and Education Center, 2725 S. BinionRoad, Apopka, FL 32703, USA
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Senthilkumar R, Prasad DMR, Govindarajan L, Saravanakumar K, Prasad BSN. Green alga-mediated treatment process for removal of zinc from synthetic solution and industrial effluent. ENVIRONMENTAL TECHNOLOGY 2019; 40:1262-1270. [PMID: 29284361 DOI: 10.1080/09593330.2017.1420696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 12/19/2017] [Indexed: 06/07/2023]
Abstract
The present work explored biosorption of Zn(II) ions from aqueous and zinc-bearing factory effluent using marine seaweed Ulva lactuca. The batch pH edge experiments using aqueous zinc solution indicated that Zn(II) uptake by U. lactuca was found to be maximum at pH 4.5 and the batch isotherm trials performed at pH 4.5 resulted in maximum uptake capacity of 128.0 mg Zn(II)/g. With 0.1 M CaCl2 (pH 3.5, HCl) as elutant, the elution of Zn(II) ions from Zn(II)-laden U. lactuca biosorbent was effective with possible regeneration and reuse for three cycles. The zinc industrial effluent was found to comprise of 87.8 mg/L of zinc ions along with excess co-ions and high total dissolved solids (838.1 mg/L). Owing to this, Zn(II) uptake from electroplating effluent by U. lactuca was suppressed due to competition from other ions. Continuous-flow sorption trials were conducted at flow rate of 5 mL/min in an up-flow fixed column. The existence of surplus competing ions in zinc wastewater influenced the Zn(II) biosorption by U. lactuca. U. lactuca-loaded packed column exhibited uptakes of 78.3 and 70.8 mg Zn(II)/g for aqueous solution and effluent, respectively. The results of three continuous sorption-desorption cycles demonstrated that reuse of U. lactuca biosorbent in remediation of zinc-containing wastewaters was practical and economical.
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Affiliation(s)
- R Senthilkumar
- a Department of Engineering , College of Applied Sciences , Sohar , Sultanate of Oman
| | - D M Reddy Prasad
- b Petroleum and Chemical Engineering Programme area, Faculty of Engineering , Universiti Teknologi Brunei , Gadong , Brunei Darussalam
| | - L Govindarajan
- a Department of Engineering , College of Applied Sciences , Sohar , Sultanate of Oman
| | - K Saravanakumar
- a Department of Engineering , College of Applied Sciences , Sohar , Sultanate of Oman
| | - B S Naveen Prasad
- c Salalah College of Technology, Chemical Section , Sultanate of Oman
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11
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Kaur H, Rajor A, Kaleka AS. Role of Phycoremediation to Remove Heavy Metals from Sewage Water: Review Article. ACTA ACUST UNITED AC 2018. [DOI: 10.3923/jest.2019.1.9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Başaran Kankiliç G, Metin AÜ, Aluç Y, Bozkaya O. Bioremoval of mercury (II) from aqueous solutions by Phragmites australis: Kinetic and equilibrium studies. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1463243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Gökben Başaran Kankiliç
- Department of Biology, Faculty of Arts and Sciences, Kırıkkale University, Kırıkkale, Turkey
| | - Ayşegül Ülkü Metin
- Department of Chemistry, Faculty of Arts and Sciences, Kırıkkale University, Kırıkkale, Turkey
| | - Yaşar Aluç
- Kırıkkale University Scientific and Technological Research Application and Research Center, Kırıkkale, Turkey
| | - Ogün Bozkaya
- Kırıkkale University Scientific and Technological Research Application and Research Center, Kırıkkale, Turkey
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Long J, Huang X, Fan X, Peng Y, Xia J. Effective adsorption of nickel (II) with Ulva lactuca dried biomass: isotherms, kinetics and mechanisms. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 78:156-164. [PMID: 30101798 DOI: 10.2166/wst.2018.253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study aimed to evaluate the Ni2+ ions adsorption capability of Ulva lactuca. The isotherms, kinetics and mechanisms for the adsorption of Ni2+ from aqueous solution by Ulva lactuca were also investigated. Influencing factors including initial pH, initial Ni2+ concentration, biomass, contact time were examined. The results indicate that the maximum Ni2+ adsorption capacity of 38.28 mg/g was obtained at pH 5, initial Ni2+ concentration 250 mg/L, biomass dosage 0.5 g/L and contact time 30 min. The adsorption can be well fitted with Langmuir isotherm, and the kinetics were well described by the pseudo-second-order model. The parameters of thermodynamics verified that Ni2+ adsorption on Ulva lactuca was a spontaneous and endothermic process. Analyses of FT-IR, SEM-EDS and XPS indicate that carboxyl and hydroxyl groups on the surface of biomass are involved in Ni2+ adsorption. The dried biomass of Ulva lactuca can be a cost-effective and eco-friendly adsorbent for the removal of Ni2+ from wastewater.
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Affiliation(s)
- Jianyou Long
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China E-mail: ; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, China
| | - Xiaona Huang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China E-mail:
| | - Xiaoli Fan
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China E-mail:
| | - Yan Peng
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China E-mail: ; Guangdong Provincial Key Laboratory of radionuclides pollution control and resources, Guangzhou University, Guangzhou, 510006, China
| | - Jianrong Xia
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China E-mail:
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Bakayoko M, Kalakodio L, Kalagodio A, Abo BO, Muhoza JP, Ismaila EM. Synthesis and characterization of the removal of organic pollutants in effluents. REVIEWS ON ENVIRONMENTAL HEALTH 2018; 33:135-146. [PMID: 29694331 DOI: 10.1515/reveh-2018-0004] [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: 01/29/2018] [Accepted: 03/08/2018] [Indexed: 06/08/2023]
Abstract
The use of a large number of organic pollutants results in the accumulation of effluents at the places of production and the environment. These substances are, therefore, dangerous for living organisms and can cause heavy environmental damage. Hence, to cure these problems certain methods were used for the elimination of organic effluents. Indeed, the methods of elimination through magnetic adsorption and/or separation prove to be effective in the treatment of certain wastes, but the effectiveness of each one of these methods depends on several characteristics and also present limitations according to the pollutants they adsorb. This review examines on the one hand the capacity of certain elements of these methods in the elimination of certain pollutants and on the other hand the advantages and limits of these methods. Elements like biochars, biosorbents and composite materials are used due to their very strong porosity which makes it possible for them to develop an important contact surface with the external medium, at low costs, and the possibility of producing them from renewable sources. The latter still run up however against the problems of formation of mud and regeneration. Depollution by magnetic separation is also used due to its capacity to mitigate the disadvantages of certain methods which generally lead to the formation of mud and overcoming also the difficulties like obtaining an active material and at the same time being able to fix the pollutants present in the effluents to treat and sensitize them to external magnetic fields.
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Affiliation(s)
- Moussa Bakayoko
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Xueyuan 30, Beijing 100083, P.R. China
| | - Loissi Kalakodio
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - Adiara Kalagodio
- School of Natural Science, Wuhan University Technology, Wuhan, China
| | - Bodjui Olivier Abo
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - Jean Pierre Muhoza
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - El Moctar Ismaila
- Beijing Institute of Technology, Energy of Environment Materials, Beijing, China
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Highly efficient simultaneous biosorption of Hg 2+ , Pb 2+ and Cu 2+ by Live yeast Yarrowia lipolytica 70562 following response surface methodology optimization: Kinetic and isotherm study. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2016.12.035] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Leus K, Perez JPH, Folens K, Meledina M, Van Tendeloo G, Du Laing G, Van Der Voort P. UiO-66-(SH)2 as stable, selective and regenerable adsorbent for the removal of mercury from water under environmentally-relevant conditions. Faraday Discuss 2017; 201:145-161. [DOI: 10.1039/c7fd00012j] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dithiol functionalized UiO-66-(SH)2 is developed as an efficient adsorbent for the removal of mercury in aqueous media. Important parameters for the application of MOFs in real-life circumstances include: stability and recyclability of the adsorbents, selectivity for the targeted Hg species in the presence of much higher concentrations of interfering species, and ability to purify wastewater below international environmental limits within a short time. We show that UiO-66-(SH)2 meets all these criteria.
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Affiliation(s)
- Karen Leus
- Center for Ordered Materials, Organometallics and Catalysis (COMOC)
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Jeffrey Paulo H. Perez
- Center for Ordered Materials, Organometallics and Catalysis (COMOC)
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Karel Folens
- Laboratory of Analytical Chemistry and Applied Ecochemistry (ECOCHEM)
- Department of Applied Analytical and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Maria Meledina
- Electron Microscopy for Materials Science (EMAT)
- Department of Physics
- University of Antwerp
- 2020 Antwerp
- Belgium
| | - Gustaaf Van Tendeloo
- Electron Microscopy for Materials Science (EMAT)
- Department of Physics
- University of Antwerp
- 2020 Antwerp
- Belgium
| | - Gijs Du Laing
- Laboratory of Analytical Chemistry and Applied Ecochemistry (ECOCHEM)
- Department of Applied Analytical and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Pascal Van Der Voort
- Center for Ordered Materials, Organometallics and Catalysis (COMOC)
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
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17
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Balderas-Hernández P, Roa-Morales G, Ramírez-Silva MT, Romero-Romo M, Rodríguez-Sevilla E, Esparza-Schulz JM, Juárez-Gómez J. Effective mercury(II) bioremoval from aqueous solution, and its electrochemical determination. CHEMOSPHERE 2017; 167:314-321. [PMID: 27732923 DOI: 10.1016/j.chemosphere.2016.10.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 09/23/2016] [Accepted: 10/01/2016] [Indexed: 06/06/2023]
Abstract
This work proposed mercury elimination using agricultural waste (Allium Cepa L.). The biomass removed 99.4% of mercury, following a pseudo-second order kinetics (r2 = 0.9999). The Langmuir model was adequately fitted to the adsorption isotherm, thereby obtaining the maximum mercury adsorption capacity of 111.1 ± 0.3 mg g-1. The biomass showed high density of strong mercury chelating groups, thus making it economically attractive. Also, the implementation of a mercury-selective electrode for continuous determination in real time is proposed; this electrode replaces techniques like atomic absorption spectroscopy, thus it can be applied to real time studies. This work therefore presents a new perspective for removing mercury(II) from contaminated water for environmental remediation.
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Affiliation(s)
- Patricia Balderas-Hernández
- Centro Conjunto de Investigación en Química Sustentable CCIQS, UAEM-UNAM, Universidad Autónoma del Estado de México, Carretera Toluca-Atlacomulco, km 14.5, C.P. 50200, Toluca, México
| | - Gabriela Roa-Morales
- Centro Conjunto de Investigación en Química Sustentable CCIQS, UAEM-UNAM, Universidad Autónoma del Estado de México, Carretera Toluca-Atlacomulco, km 14.5, C.P. 50200, Toluca, México
| | - María Teresa Ramírez-Silva
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, C.P. 09340, Ciudad de México, México
| | - Mario Romero-Romo
- Departamento de Materiales, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo 180, Col. Reynosa-Tamaulipas, Del. Azcapotzalco, C.P. 02200, Ciudad de México, México
| | - Erika Rodríguez-Sevilla
- Instituto de Física, Universidad Nacional Autónoma de México, Ciudad Universitaria, C.P. 04510, Ciudad de México, México
| | - Juan Marcos Esparza-Schulz
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, C.P. 09340, Ciudad de México, México
| | - Jorge Juárez-Gómez
- Centro Conjunto de Investigación en Química Sustentable CCIQS, UAEM-UNAM, Universidad Autónoma del Estado de México, Carretera Toluca-Atlacomulco, km 14.5, C.P. 50200, Toluca, México.
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18
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Rajasulochana P, Preethy V. Comparison on efficiency of various techniques in treatment of waste and sewage water – A comprehensive review. RESOURCE-EFFICIENT TECHNOLOGIES 2016. [DOI: 10.1016/j.reffit.2016.09.004] [Citation(s) in RCA: 255] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Zeraatkar AK, Ahmadzadeh H, Talebi AF, Moheimani NR, McHenry MP. Potential use of algae for heavy metal bioremediation, a critical review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 181:817-831. [PMID: 27397844 DOI: 10.1016/j.jenvman.2016.06.059] [Citation(s) in RCA: 191] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/11/2016] [Accepted: 06/26/2016] [Indexed: 05/11/2023]
Abstract
Algae have several industrial applications that can lower the cost of biofuel co-production. Among these co-production applications, environmental and wastewater bioremediation are increasingly important. Heavy metal pollution and its implications for public health and the environment have led to increased interest in developing environmental biotechnology approaches. We review the potential for algal biosorption and/or neutralization of the toxic effects of heavy metal ions, primarily focusing on their cellular structure, pretreatment, modification, as well as potential application of genetic engineering in biosorption performance. We evaluate pretreatment, immobilization, and factors affecting biosorption capacity, such as initial metal ion concentration, biomass concentration, initial pH, time, temperature, and interference of multi metal ions and introduce molecular tools to develop engineered algal strains with higher biosorption capacity and selectivity. We conclude that consideration of these parameters can lead to the development of low-cost micro and macroalgae cultivation with high bioremediation potential.
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Affiliation(s)
| | - Hossein Ahmadzadeh
- Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, 1436-91779, Iran.
| | - Ahmad Farhad Talebi
- Genetic Department, Faculty of Biotechnology, Semnan University, Semnan, 35131-19111, Iran
| | - Navid R Moheimani
- Algae R&D Centre, School of Veterinary and Life Sciences, Murdoch University, Australia
| | - Mark P McHenry
- School of Engineering and Information Technology, Murdoch University, Australia
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20
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Figueira P, Henriques B, Teixeira A, Lopes CB, Reis AT, Monteiro RJR, Duarte AC, Pardal MA, Pereira E. Comparative study on metal biosorption by two macroalgae in saline waters: single and ternary systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:11985-97. [PMID: 26961530 DOI: 10.1007/s11356-016-6398-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 02/29/2016] [Indexed: 06/05/2023]
Abstract
The biosorption capability of two marine macroalgae (green Ulva lactuca and brown Fucus vesiculosus) was evaluated in the removal of toxic metals (Hg, Cd and Pb) from saline waters, under realistic conditions. Results showed that, independently of the contamination scenario tested, both macroalgae have a remarkable capacity to biosorb Hg and Pb. In single-contaminant systems, by using only c.a. 500 mg of non-pre-treated algae biomass (size <200 μm) per litter, it was possible to achieve removal efficiencies between 96 and 99 % for Hg and up to 86 % for Pb. Despite the higher removal of Hg, equilibrium was reached more quickly for Pb (after 8 h). In multi-contaminant systems, macroalgae exhibited a similar selectivity toward the target metals: Hg > Pb> > Cd, although Pb removal by U. lactuca was more inhibited than that achieved by F. vesiculosus. Under the experimental conditions used, none of the macroalgae was effective to remove Cd (maximum removal of 20 %). In all cases, the kinetics of biosorption was mathematically described with success. Globally, it became clear that the studied macroalgae may be part of simple, efficient, and cost-effective water treatment technologies. Nevertheless, Fucus vesiculosus has greater potential, since it always presented higher initial sorption rates and higher removal efficiencies.
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Affiliation(s)
- Paula Figueira
- CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Bruno Henriques
- CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
- CIIMAR, Interdisciplinary Centre of Marine and Environmental, Rua dos Bragas 289, 4050-123, Porto, Portugal.
| | - Ana Teixeira
- CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Cláudia B Lopes
- CIIMAR, Interdisciplinary Centre of Marine and Environmental, Rua dos Bragas 289, 4050-123, Porto, Portugal
- CICECO and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Ana T Reis
- CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Rui J R Monteiro
- CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
- CIIMAR, Interdisciplinary Centre of Marine and Environmental, Rua dos Bragas 289, 4050-123, Porto, Portugal
| | - A C Duarte
- CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - M A Pardal
- CEF and Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
| | - E Pereira
- CESAM and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
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21
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Dil EA, Ghaedi M, Ghezelbash GR, Asfaram A, Ghaedi AM, Mehrabi F. Modeling and optimization of Hg2+ ion biosorption by live yeast Yarrowia lipolytica 70562 from aqueous solutions under artificial neural network-genetic algorithm and response surface methodology: kinetic and equilibrium study. RSC Adv 2016. [DOI: 10.1039/c6ra11292g] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study was devoted to the investigation of Hg2+ ion biosorption by a live yeast organism, namely, Yarrowia lipolytica 70562 (supplied commercially), which was sufficiently identified and studied by SEM-EDS and FT-IR methods.
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Affiliation(s)
| | | | | | - Arash Asfaram
- Chemistry Department
- Yasouj University
- Yasouj 75918-74831
- Iran
| | | | - Fatemeh Mehrabi
- Chemistry Department
- Gachsaran Branch
- Islamic Azad University
- Gachsaran
- Iran
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22
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Phragmites karkaas a Biosorbent for the Removal of Mercury Metal Ions from Aqueous Solution: Effect of Modification. J CHEM-NY 2015. [DOI: 10.1155/2015/293054] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Batch scale studies for the adsorption potential of novel biosorbentPhragmites karka(Trin), in its natural and treated forms, were performed for removal of mercury ions from aqueous solution. The study was carried out at different parameters to obtain optimum conditions of pH, biosorbent dose, agitation speed, time of contact, temperature, and initial metal ion concentration. To analyze the suitability of the process and maximum amount of metal uptake, Dubinin-Radushkevich (D-R) model, Freundlich isotherm, and Langmuir isotherm were applied. The values ofqmaxfor natural and treated biosorbents were found at 1.79 and 2.27 mg/g, respectively. The optimum values of contact time and agitation speed were found at 50 min and 150 rpm for natural biosorbent whereas 40 min and 100 rpm for treated biosorbent, respectively. The optimum biosorption capacities were observed at pH 4 and temperature 313 K for both naturalP. karkaand treatedP. karka.RLvalues indicate that comparatively treatedP. karkawas more feasible for mercury adsorption compared to naturalP. karka. Both pseudo-first-order and pseudo-second-order kinetic models were applied and it was found that data fit best to the pseudo-second-order kinetic model. Thermodynamic studies indicate that adsorption process was spontaneous, feasible, and endothermic.
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23
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El Nemr A, El-Sikaily A, Khaled A, Abdelwahab O. Removal of toxic chromium from aqueous solution, wastewater and saline water by marine red alga Pterocladia capillacea and its activated carbon. ARAB J CHEM 2015. [DOI: 10.1016/j.arabjc.2011.01.016] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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24
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Allouche FN, Guibal E, Mameri N. Preparation of a new chitosan-based material and its application for mercury sorption. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Khoramzadeh E, Nasernejad B, Halladj R. Mercury biosorption from aqueous solutions by Sugarcane Bagasse. J Taiwan Inst Chem Eng 2013. [DOI: 10.1016/j.jtice.2012.09.004] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Adsorption of Hg(II) from Aqueous Solution Using Adulsa (Justicia adhatoda) Leaves Powder: Kinetic and Equilibrium Studies. J CHEM-NY 2013. [DOI: 10.1155/2013/174807] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The ability of Adulsa leaves powder (ALP) to adsorb Hg(II) from aqueous solutions has been investigated through batch experiments. The ALP biomass was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The experimental parameters that were investigated in this study included pH, adsorbent dosage, and effect of contact time along with initial metal ion concentration. The adsorption process was relatively fast, and equilibrium was achieved after 40 min of contact time. The maximum removal of Hg(II), 97.5% was observed at pH 6. The adsorption data were correlated with Langmuir, Freundlich, and Temkin isotherms. Isotherms results were amply fitted by the Langmuir model determining a monolayer maximum adsorption capacity (qm) of ALP biomass equal to 107.5 mg g−1and suggesting a functional group-limited sorption process. The kinetic process of Hg(II) adsorption onto ALP biomass was tested by applying pseudofirst-order, pseudosecond-order, Elovich, and intraparticle-diffusion models to correlate the experimental data and to determine the kinetic parameters. It was found that the pseudosecond order kinetic model for Hg(II) adsorption fitted very well. The rate determining step is described by intraparticle diffusion model. These studies considered the possibility of using Adulsa plant leaves biomass as an inexpensive, efficient, and environmentally safe adsorbent for the treatment of Hg(II) contaminated wastewaters.
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27
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Bolan NS, Choppala G, Kunhikrishnan A, Park J, Naidu R. Microbial transformation of trace elements in soils in relation to bioavailability and remediation. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2013; 225:1-56. [PMID: 23494555 DOI: 10.1007/978-1-4614-6470-9_1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Affiliation(s)
- Nanthi S Bolan
- Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA, Australia,
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28
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Deng X, Wang P. Isolation of marine bacteria highly resistant to mercury and their bioaccumulation process. BIORESOURCE TECHNOLOGY 2012; 121:342-347. [PMID: 22864169 DOI: 10.1016/j.biortech.2012.07.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Revised: 05/22/2012] [Accepted: 07/05/2012] [Indexed: 06/01/2023]
Abstract
The marine bacteria strains S1, S2 and S3, were isolated on seawater culturing medium containing Hg(2+), Cd(2+), Cr(6+) or Ni(2+) at concentrations of 20 mg L(-1) and more. The isolates showed tolerance to these heavy metals. S1 grew in the presence of 120 mg L(-1) of Hg(2+) and accumulated Hg(2+) at pH 4-10. For the effect of co-existing cations on bioaccumulation of target metal, it was found that the effect depended on not only the variety and initial concentration of co-existing ions, but also the initial concentration of target metal and biomass dosage. A new parameter, the ratio of remaining bioaccumulation capacity (RRBC) of biomass, was therefore defined to evaluate such effect. Furthermore, the mechanism evaluation revealed that S1 bound about 70% Hg(2+) on the cell surface, and carboxyl group played an important role in Hg(2+) binding.
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Affiliation(s)
- Xu Deng
- College of Life Sciences, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen 518060, PR China.
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29
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Removal of mercury by foam fractionation using surfactin, a biosurfactant. Int J Mol Sci 2011; 12:8245-58. [PMID: 22174661 PMCID: PMC3233467 DOI: 10.3390/ijms12118245] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 11/04/2011] [Accepted: 11/09/2011] [Indexed: 12/01/2022] Open
Abstract
The separation of mercury ions from artificially contaminated water by the foam fractionation process using a biosurfactant (surfactin) and chemical surfactants (SDS and Tween-80) was investigated in this study. Parameters such as surfactant and mercury concentration, pH, foam volume, and digestion time were varied and their effects on the efficiency of mercury removal were investigated. The recovery efficiency of mercury ions was highly sensitive to the concentration of the surfactant. The highest mercury ion recovery by surfactin was obtained using a surfactin concentration of 10 × CMC, while recovery using SDS required < 10 × CMC and Tween-80 >10 × CMC. However, the enrichment of mercury ions in the foam was superior with surfactin, the mercury enrichment value corresponding to the highest metal recovery (10.4%) by surfactin being 1.53. Dilute solutions (2-mg L−1 Hg2+) resulted in better separation (36.4%), while concentrated solutions (100 mg L−1) enabled only a 2.3% recovery using surfactin. An increase in the digestion time of the metal solution with surfactin yielded better separation as compared with a freshly-prepared solution, and an increase in the airflow rate increased bubble production, resulting in higher metal recovery but low enrichment. Basic solutions yielded higher mercury separation as compared with acidic solutions due to the precipitation of surfactin under acidic conditions.
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30
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Figueira P, Lopes CB, Daniel-da-Silva AL, Pereira E, Duarte AC, Trindade T. Removal of mercury (II) by dithiocarbamate surface functionalized magnetite particles: application to synthetic and natural spiked waters. WATER RESEARCH 2011; 45:5773-5784. [PMID: 21924455 DOI: 10.1016/j.watres.2011.08.057] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 07/22/2011] [Accepted: 08/27/2011] [Indexed: 05/31/2023]
Abstract
In order to take advantage of the high affinity between mercury and sulphur, magnetite (Fe(3)O(4)) particles functionalized with dithiocarbamate groups (CS(2)(-)), were synthesized to be used as a new type of sorbent to remove Hg (II) from synthetic and natural spiked waters. The effectiveness of this type of sorbent was studied, and its potential as cleanup agent for contaminated waters was assessed. Batch stirred tank experiments were carried out by contacting a volume of solution with known amounts of functionalized Fe(3)O(4) particles, in order to study the effect of sorbent dose, salinity, and the kinetics and the equilibrium of this unit operation. A complete Hg (II) removal (ca. 99.8%) was attained with 6 mg/L of magnetic particles for an initial metal concentration of 50 μg/L. It was confirmed that highly complex matrices, such as seawater (ca. 99%) and river water (ca. 97%), do not affect the removal capacity of the functionalized magnetic particles. Concerning isotherms, no significant differences were observed between two- and three-parameter models (P = 0.05%); however, Sips isotherm provided the lowest values of SS and S(x/y), predicting a maximum sorption capacity of 206 mg/g, in the range of experimental conditions under study. The solid loadings measured in this essay surmount the majority of the values found in literature for other type of sorbents.
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Affiliation(s)
- P Figueira
- CICECO & Department of Chemistry, University of Aveiro, Campus de Santiago, Aveiro, Portugal
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31
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Sen TK, Azman AFB, Maitra S, Dutta BK. Removal of mercury(II) from aqueous solutions using the leaves of the Rambai tree (Baccaurea motleyana). WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2011; 83:834-842. [PMID: 22073731 DOI: 10.2175/106143011x12989211841098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This study was undertaken to evaluate the biosorption potential of a natural, low-cost biosorbent, Rambai leaves (Baccaurea motleyana), to remove trace amounts of Hg(II) from aqueous solutions. It was found that the amount of Hg(II) biosorption by Rambai leaves increased with initial metal ion concentration, contact time, and solution pH but decreased as the amount of biosorbent increased. The maximum biosorption capacity was 121.95 mg/g for an initial concentration range of 5 to 120 ppb. Overall, kinetic studies showed that the Hg(II) biosorption process followed pseudo-second-order kinetics based on pseudo-first-order and intraparticle diffusion models. Isotherm data revealed that the biosorption process followed both Freundlich and Langmuir isotherms. The value of separation factor, R(L), from the Langmuir equation and rate of biosorption, n, from the Freundlich model also indicated favorable adsorption.
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Affiliation(s)
- Tushar Kanti Sen
- Department of Chemical Engineering, Curtin University of Technology, Perth, Western Australia.
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32
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When dissolved is not truly dissolved—The importance of colloids in studies of metal sorption on organic matter. J Colloid Interface Sci 2011; 361:137-47. [DOI: 10.1016/j.jcis.2011.05.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 05/02/2011] [Accepted: 05/06/2011] [Indexed: 11/19/2022]
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33
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Zakhama S, Dhaouadi H, M'Henni F. Nonlinear modelisation of heavy metal removal from aqueous solution using Ulva lactuca algae. BIORESOURCE TECHNOLOGY 2011; 102:786-796. [PMID: 20855200 DOI: 10.1016/j.biortech.2010.08.107] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 08/26/2010] [Accepted: 08/27/2010] [Indexed: 05/29/2023]
Abstract
After extensive analysis, Ulva lactuca dried algae, collected from the Monastir coastal zone, was proven to be successful as an adsorbent for the removal of certain inorganic pollutants. The main objective of this study was the nonlinear modeling of heavy metal removal from an aqueous solution, using a freely available and well analyzed biomaterial, as well as the evaluation of its efficacy on various metal ion sorptions. Although relatively low specific surface area, compared to more conventional adsorbents, the selected biomaterial displays very interesting retention capacities when used with aqueous inorganic pollutants. The pseudo, first and second-order kinetic models were used to investigate the kinetic retention mechanism. Assuming the nonlinear form, the results indicate that the retention mechanism is diffusion controlled. Concerning the heavy metal uptake capacity, it was found that the selected biomaterial has a retention capacity of 67 mg g(-1) of Ni(II), 112 mg g(-1) of Cu(II), 127 mg g(-1) of Cd(II) and 230 mg g(-1) of Pb(II).
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Affiliation(s)
- S Zakhama
- Université de Monastir, Faculté des Sciences, Département de Chimie, UR Chimie Appliquée, Environnement, Tunisia
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34
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Reategui M, Maldonado H, Ly M, Guibal E. Mercury(II) biosorption using Lessonia sp. kelp. Appl Biochem Biotechnol 2010; 162:805-22. [PMID: 20155446 DOI: 10.1007/s12010-010-8912-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2009] [Accepted: 01/10/2010] [Indexed: 11/27/2022]
Abstract
Lessonia nigrescens and Lessonia trabeculata kelps have been tested for the sorption of mercury from aqueous solutions. A pretreatment (using CaCl(2)) allowed stabilizing the biomass that was very efficient for removing Hg(II) at pH 6-7. Sorption isotherms were described by the Langmuir equation with sorption capacities close to 240-270 mg Hg g(-1) at pH 6. The temperature had a negligible effect on the distribution of the metal at equilibrium. The presence of chloride anions had a more marked limiting impact than sulfate and nitrate anions. The uptake kinetics were modeled using the pseudo-second-order equation that fitted better experimental data than the pseudo-first-order equation. The particle size hardly influenced sorption isotherms and uptake kinetics, indicating that sorption occurs in the whole mass of the biosorbent and that intraparticle mass transfer resistance was not the limiting rate. Varying the sorbent dosage and the initial metal concentration influenced the equilibrium, but the kinetic parameters were not drastically modified. Metal can be eluted with hydrochloric acid, citric acid, or acidic KI solutions.
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Affiliation(s)
- Mariana Reategui
- Departamento Académico de Química, Universidad Peruana Cayetano Heredia, Av. Honorio Delgado, 430 Urbanización Ingeniería, Lima 31, Peru
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Dewangan T, Tiwari A, Bajpai AK. Adsorption of Hg(II) Ions onto Binary Biopolymeric Beads of Carboxymethyl Cellulose and Alginate. J DISPER SCI TECHNOL 2010. [DOI: 10.1080/01932690903212941] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Sari A, Tuzen M. Removal of mercury(II) from aqueous solution using moss (Drepanocladus revolvens) biomass: equilibrium, thermodynamic and kinetic studies. JOURNAL OF HAZARDOUS MATERIALS 2009; 171:500-507. [PMID: 19576694 DOI: 10.1016/j.jhazmat.2009.06.023] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Revised: 06/06/2009] [Accepted: 06/08/2009] [Indexed: 05/28/2023]
Abstract
The equilibrium, thermodynamics and kinetics of the biosorption of Hg(II) onto moss (Drepanocladus revolvens) biomass from aqueous solution were investigated. Optimum experimental parameters were determined to be pH 5.5, contact time 60min, biomass concentration 4 g L(-1) of solution, and temperature 20 degrees C. From the Langmuir model the maximum biosorption capacity of the moss biomass was found to be 94.4 mg g(-1). The mean free energy value (10.2 kJ mol(-1)) evaluated by using the Dubinin-Radushkevich (D-R) model indicated that the biosorption of mercury ions onto D. revolvens was taken place by chemical ion-exchange. The kinetic studies indicated that the biosorption process of mercury ions followed well pseudo-second-order model. The calculated thermodynamic parameters (DeltaG degrees , DeltaS degrees , DeltaH degrees ) showed the biosorption to be exothermic and spontaneous with decreased randomness at the solid-solution interface. The recovery of the Hg(II) from D. revolvens biomass was found to be 99% using 1M HCl. It was concluded that the D. revolvens biomass can be used as biosorbent for the treatment of wastewaters containing Hg(II) ions.
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Affiliation(s)
- Ahmet Sari
- Department of Chemistry, Faculty of Science and Arts, Gaziosmanpasa University, Tasliciftlik Campus, 60250 Tokat, Turkey
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Tuzen M, Sari A, Mendil D, Soylak M. Biosorptive removal of mercury(II) from aqueous solution using lichen (Xanthoparmelia conspersa) biomass: kinetic and equilibrium studies. JOURNAL OF HAZARDOUS MATERIALS 2009; 169:263-270. [PMID: 19380200 DOI: 10.1016/j.jhazmat.2009.03.096] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Revised: 03/17/2009] [Accepted: 03/18/2009] [Indexed: 05/27/2023]
Abstract
The potential use of the lichen biomass (Xanthoparmelia conspersa) to remove mercury(II) ions from aqueous solution by biosorption was evaluated using the batch method. Effects of pH, contact time, biomass concentration and temperature on the removal of Hg(II) ions were studied. The Langmuir isotherm models defined the equilibrium data precisely compared to Freundlich model and the maximum biosorption capacity obtained was 82.8 mg g(-1). From the D-R isotherm model, the mean free energy was calculated as 9.5 kJ mol(-1). It shows that the biosorption of Hg(II) ions onto X. conspersa biomass was taken place by chemical ion-exchange. Experimental data were also performed to the pseudo-first-order and pseudo-second-order kinetic models. The results indicated that the biosorption of Hg(II) on the lichen biomass followed well the second-order kinetics. Thermodynamic parameters, DeltaG(o), DeltaH(o) and DeltaS(o) indicated the Hg(II) sorption to be exothermic and spontaneous with decreased randomness at the solid-solution interface. Furthermore, the lichen biomass could be regenerated using 1M HCl, with up to 85% recovery, which allowed the reuse of the biomass in ten biosorption-desorption cycles without any considerable loss of biosorptive removal capacity.
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Affiliation(s)
- Mustafa Tuzen
- Department of Chemistry, Gaziosmanpasa University, 60250 Tokat, Turkey
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Enhanced biosorption of mercury(II) and cadmium(II) by cold-induced hydrophobic exobiopolymer secreted from the psychrotroph Pseudomonas fluorescens BM07. Appl Microbiol Biotechnol 2008; 80:531-44. [PMID: 18679675 DOI: 10.1007/s00253-008-1621-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2007] [Revised: 07/12/2008] [Accepted: 07/14/2008] [Indexed: 10/21/2022]
Abstract
The cells of psychrotrophic Pseudomonas fluorescens BM07 were found to secrete large amounts of exobiopolymer (EBP) composed of mainly hydrophobic (water insoluble) polypeptide(s) (as contain approximately 50 mol% hydrophobic amino acids, lacking cysteine residue) when grown on fructose containing limited M1 medium at the temperatures as low as 0-10 degrees C but trace amount at high (30 degrees C, optimum growth) temperature. Two types of nonliving BM07 cells (i.e., cells grown at 30 degrees C and 10 degrees C) as well as the freeze-dried EBP were compared for biosorption of mercury (Hg(II)) and cadmium (Cd(II)). The optimum adsorption pH was found 7 for Hg(II) but 6 for Cd(II), irrespective of the type of biomass. Equilibrium adsorption data well fitted the Langmuir adsorption model. The maximum adsorption (Q(max)) was 72.3, 97.4, and 286.2 mg Hg(II)/g dry biomass and 18.9, 27.0, and 61.5 mg Cd(II)/g dry biomass for cells grown at 30 degrees C and 10 degrees C and EBP, respectively, indicating major contribution of heavy metal adsorption by cold-induced EBP. Mercury(II) binding induced a significant shift of infrared (IR) amide I and II absorption of EBP whereas cadmium(II) binding showed only a very little shift. These IR shifts demonstrate that mercury(II) and cadmium(II) might have different binding sites in EBP, which was supported by X-ray diffraction and differential scanning calorimetric analysis and sorption results of chemically modified biomasses. This study implies that the psychrotrophs like BM07 strain may play an important role in the bioremediation of heavy metals in the temperate regions especially in the inactive cold season.
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Khambhaty Y, Mody K, Basha S, Jha B. Hg(II) Removal from Aqueous Solution by Dead Fungal Biomass of MarineAspergillus niger: Kinetic Studies. SEP SCI TECHNOL 2008. [DOI: 10.1080/01496390801888235] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Basha S, Murthy ZVP, Jha B. Sorption of Hg(II) from Aqueous Solutions onto Carica papaya: Application of Isotherms. Ind Eng Chem Res 2008. [DOI: 10.1021/ie071210o] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shaik Basha
- Marine Biotechnology and Ecology Division, Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, Gujarat, India, and Department of Chemical Engineering, S.V. National Institute of Technology Surat, Surat 395007, Gujarat, India
| | - Z. V. P. Murthy
- Marine Biotechnology and Ecology Division, Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, Gujarat, India, and Department of Chemical Engineering, S.V. National Institute of Technology Surat, Surat 395007, Gujarat, India
| | - B. Jha
- Marine Biotechnology and Ecology Division, Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, Gujarat, India, and Department of Chemical Engineering, S.V. National Institute of Technology Surat, Surat 395007, Gujarat, India
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El-Sikaily A, El Nemr A, Khaled A, Abdelwehab O. Removal of toxic chromium from wastewater using green alga Ulva lactuca and its activated carbon. JOURNAL OF HAZARDOUS MATERIALS 2007; 148:216-28. [PMID: 17360109 DOI: 10.1016/j.jhazmat.2007.01.146] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2006] [Revised: 01/26/2007] [Accepted: 01/29/2007] [Indexed: 05/14/2023]
Abstract
Biosorption of heavy metals can be an effective process for the removal of toxic chromium ions from wastewater. In this study, the batch removal of toxic hexavalent chromium ions from aqueous solution, saline water and wastewater using marine dried green alga Ulva lactuca was investigated. Activated carbon prepared from U. lactuca by acid decomposition was also used for the removal of chromium from aqueous solution, saline water and wastewater. The chromium uptake was dependent on the initial pH and the initial chromium concentration, with pH approximately 1.0, being the optimum pH value. Langmuir, Freundlich, Redlich-Peterson and Koble-Corrigan isotherm models were fitted well the equilibrium data for both sorbents. The maximum efficiencies of chromium removal were 92 and 98% for U. lactuca and its activated carbon, respectively. The maximum adsorption capacity was found to be 10.61 and 112.36 mg g(-1) for dried green alga and activated carbon developed from it, respectively. The adsorption capacities of U. lactuca and its activated carbon were independent on the type of solution containing toxic chromium and the efficiency of removal was not affected by the replacing of aqueous solution by saline water or wastewater containing the same chromium concentration. Two hours were necessary to reach the sorption equilibrium. The chromium uptake by U. lactuca and its activated carbon form were best described by pseudo second-order rate model. This study verifies the possibility of using inactivated marine green alga U. lactuca and its activated carbon as valuable material for the removal of chromium from aqueous solutions, saline water or wastewater.
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Affiliation(s)
- Amany El-Sikaily
- Environmental Division, National Institute of Oceanography and Fisheries, Kayet Bey, Alexandria, Egypt
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Ahluwalia SS, Goyal D. Microbial and plant derived biomass for removal of heavy metals from wastewater. BIORESOURCE TECHNOLOGY 2007; 98:2243-57. [PMID: 16427277 DOI: 10.1016/j.biortech.2005.12.006] [Citation(s) in RCA: 558] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2005] [Revised: 11/29/2005] [Accepted: 12/02/2005] [Indexed: 05/06/2023]
Abstract
Discharge of heavy metals from metal processing industries is known to have adverse effects on the environment. Conventional treatment technologies for removal of heavy metals from aqueous solution are not economical and generate huge quantity of toxic chemical sludge. Biosorption of heavy metals by metabolically inactive non-living biomass of microbial or plant origin is an innovative and alternative technology for removal of these pollutants from aqueous solution. Due to unique chemical composition biomass sequesters metal ions by forming metal complexes from solution and obviates the necessity to maintain special growth-supporting conditions. Biomass of Aspergillus niger, Penicillium chrysogenum, Rhizopus nigricans, Ascophyllum nodosum, Sargassum natans, Chlorella fusca, Oscillatoria anguistissima, Bacillus firmus and Streptomyces sp. have highest metal adsorption capacities ranging from 5 to 641 mg g(-1) mainly for Pb, Zn, Cd, Cr, Cu and Ni. Biomass generated as a by-product of fermentative processes offers great potential for adopting an economical metal-recovery system. The purpose of this paper is to review the available information on various attributes of utilization of microbial and plant derived biomass and explores the possibility of exploiting them for heavy metal remediation.
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Affiliation(s)
- Sarabjeet Singh Ahluwalia
- Department of Biotechnology & Environmental Sciences, Thapar Institute of Engineering & Technology, Patiala 147 004, Punjab, India
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Chu KH, Hashim MA. Copper biosorption on immobilized seaweed biomass: column breakthrough characteristics. J Environ Sci (China) 2007; 19:928-32. [PMID: 17966848 DOI: 10.1016/s1001-0742(07)60153-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The biosorption of copper by the brown seaweed Sargassum baccularia, immobilized onto polyvinyl alcohol (PVA) gel beads, was investigated with fixed-bed experiments. Laboratory-scale column tests were performed to determine breakthrough curves with varying flow rates and feed concentrations. A theoretical fixed-bed model, known as the Bohart-Adams equation, was evaluated in simulating the experimental breakthrough curves. The Bohart-Adams model qualitatively predicted the breakthrough trends. PVA-immobilized seaweed biomass beads were amenable to efficient regeneration with aqueous solution containing the chelating agent ethylenediaminetetraacetic acid (EDTA). The biosorbent retained most of its original uptake capacity over three cycles of use. The excellent reusability of the biosorbent could lead to the development of a viable metal remediation technology.
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Affiliation(s)
- K H Chu
- Honeywell Process Solutions, 17 Changi Business Park, Central 1, Singapore 486073.
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Cepriá G, Irigoyen L, Castillo JR. A Microscale Procedure to Test the Metal Sorption Properties of Biomass Sorbents: a Time and Reagents Saving Alternative to Conventional Methods. Mikrochim Acta 2006. [DOI: 10.1007/s00604-006-0576-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Herrero R, Lodeiro P, Rey-Castro C, Vilariño T, Sastre de Vicente ME. Removal of inorganic mercury from aqueous solutions by biomass of the marine macroalga Cystoseira baccata. WATER RESEARCH 2005; 39:3199-210. [PMID: 16023700 DOI: 10.1016/j.watres.2005.05.041] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2004] [Revised: 04/20/2005] [Accepted: 05/25/2005] [Indexed: 05/03/2023]
Abstract
The ability of Cystoseira baccata algal biomass to remove Hg(II) from aqueous solutions is investigated. The mercury biosorption process is studied through batch experiments at 25 degrees C with regard to the influence of contact time, initial mercury concentration, solution pH, salinity and presence of several divalent cations. The acid-base properties of the alga are also studied, since they are related to the affinity for heavy metals. The studies of the pH effect on the metal uptake evidence a sharp increasing sorption up to a pH value around 7.0, which can be ascribed to changes both in the inorganic Hg(II) speciation and in the dissociation state of the acid algal sites. The sorption isotherms at constant pH show uptake values as high as 178 mg g(-1) (at pH 4.5) and 329 mg g(-1) (at pH 6.0). The studies of the salinity influence on the Hg(II) sorption capacity of the alga exhibit two opposite effects depending on the electrolyte added; an increase in concentration of nitrate salts (NaNO3, KNO3) slightly enhances the metal uptake, on the contrary, the addition of NaCl salt leads to a drop in the sorption. The addition of different divalent cations to the mercury solution, namely Ca2+, Mg2+, Zn2+, Cd2+, Pb2+ and Cu2+, reveals that their effect on the uptake process is negligible. Finally, the equilibrium sorption results are compared with predictions obtained from the application of a simple competitive chemical model, which involves a discrete proton binding constant and three additional constants for the binding of the main neutral inorganic Hg(II) complexes, Hg(Cl)2, HgOHCl and Hg(OH)2, to the algal surface sites.
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Affiliation(s)
- Roberto Herrero
- Departamento de Química Física e Enxeñería Química I, University of A Coruña, C/Alejandro de la Sota, 1, 15008 A Coruña, Spain.
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Vijayaraghavan K, Jegan J, Palanivelu K, Velan M. Biosorption of copper, cobalt and nickel by marine green alga Ulva reticulata in a packed column. CHEMOSPHERE 2005; 60:419-26. [PMID: 15924962 DOI: 10.1016/j.chemosphere.2004.12.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2004] [Revised: 12/10/2004] [Accepted: 12/13/2004] [Indexed: 05/02/2023]
Abstract
Biosorption of copper, cobalt and nickel by marine green alga Ulva reticulata were investigated in a packed bed up-flow column. The experiments were conducted to study the effect of important design parameters such as bed height and flow rate. At a bed height of 25 cm, the metal-uptake capacity of U. reticulata for copper, cobalt and nickel was found to be 56.3+/-0.24, 46.1+/-0.07 and 46.5+/-0.08 mgg(-1), respectively. The Bed Depth Service Time (BDST) model was used to analyze the experimental data. The computed sorption capacity per unit bed volume (N0) was 2580, 2245 and 1911 mgl(-1) for copper, cobalt and nickel, respectively. The rate constant (K(a)) was recorded as 0.063, 0.081 and 0.275 lmg(-1)h(-1) for copper, cobalt and nickel, respectively. In flow rate experiments, the results confirmed that the metal uptake capacity and the metal removal efficiency of U. reticulata decreased with increasing flow rate. The Thomas model was used to fit the column biosorption data at different flow rates and model constants were evaluated. The column regeneration studies were carried out for three sorption-desorption cycles. The elutant used for the regeneration of the biosorbent was 0.1 M CaCl2 at pH 3 adjusted using HCl. For all the metal ions, a decreased breakthrough time and an increased exhaustion time were observed as the regeneration cycles progressed, which also resulted in a broadened mass transfer zone. The pH variations during both sorption and desorption process have been reported.
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Affiliation(s)
- K Vijayaraghavan
- Department of Chemical Engineering, Anna University, Alagappa College of Technology, Chennai 600 025, India
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