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García-Seoane R, Antelo J, Fiol S, Fernández JA, Aboal JR. Unravelling the metal uptake process in mosses: Comparison of aquatic and terrestrial species as air pollution biomonitors. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 333:122069. [PMID: 37330186 DOI: 10.1016/j.envpol.2023.122069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/19/2023]
Abstract
Transplanted mosses have been widely shown to be excellent tools for biomonitoring air pollution; however, it is not clear how the functional groups present on their surfaces affect the uptake of metal cations. In the present study, we examined differences in trace metal accumulation in two terrestrial and one aquatic moss species, and investigated whether the differences depended on their physico-chemical characteristics. In the laboratory, we determined C, N and H contents in their tissues and obtained the ATR-FTIR spectra (to identify the presence of functional groups). We also conducted surface acid-base titrations and metal adsorption assays with Cd, Cu and Pb. In the field, we exposed transplants of each species near different air-polluting industries, and determined the mosses enrichment of Al, Cd, Co, Cr, Cu, Fe, Ni, Pb and V. Laboratory results demonstrated higher metal uptake capacity in the terrestrial mosses Sphagnum palustre and Pseudoscleropodium purum, compared to that in the aquatic moss Fontinalis antipyretica, which can be attributed to a greater abundance of acidic functional groups (i.e. negatively charged binding sites) on the surface of the terrestrial mosses. The affinity of moss for certain elements depends on the abundance and nature of surface functional groups. Accordingly, the metal concentrations generally reached higher levels in S. palustre transplants compared to the other species, except for the uptake of Hg, which was higher in F. antipyretica. However, the findings also suggest an interaction between the type of environment (terrestrial or aquatic) and the moss characteristics that may influence the abovementioned trend. Thus, irrespective of the physico-chemical characteristics, metal uptake varied depending on the environment of origin of the mosses "i.e. atmospheric or aquatic". In other words, the findings suggest that species that accumulate more metals in terrestrial environments will accumulate lower amounts of metals in aquatic environments and vice versa.
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Affiliation(s)
- R García-Seoane
- Instituto Español de Oceanografía (IEO-CSIC), Centro Oceanográfico de A Coruña, 15001, A Coruña, Spain.
| | - J Antelo
- CRETUS, Department of Soil Science and Agricultural Chemistry, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - S Fiol
- CRETUS, Department of Physical Chemistry, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - J A Fernández
- CRETUS, Department of Functional Biology, Ecology Unit, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - J R Aboal
- CRETUS, Department of Functional Biology, Ecology Unit, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
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González Fernández LA, Castillo Ramos V, Sánchez Polo M, Medellín Castillo NA. Fundamentals in applications of algae biomass: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 338:117830. [PMID: 37004486 DOI: 10.1016/j.jenvman.2023.117830] [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: 01/20/2023] [Revised: 03/08/2023] [Accepted: 03/26/2023] [Indexed: 06/19/2023]
Abstract
Algae play an extremely important ecological role. They form the basis of trophic webs, produce oxygen that allows the respiration of many of the organisms in aquatic environments, absorb CO2, and serve as refuge areas and habitats for thousands of species. Many species can also absorb organic pollutants from seawater. Algae have been used for many centuries by humans as a source of food, fertilizer, fodder, and for the extraction of compounds with antifungal, antiviral, anticancer, and antibacterial properties. More recently, some species have been used for the production of biofuels. It has been shown that mixing small proportions of algae with the feed of cattle can reduce methane emissions from their digestive activity by more than 95%. One of the most widespread but least known applications of algae is the extraction of their phycocolloids for utilization in food, pharmaceutical, wine, and textile industries, among others. These compounds have gelling, stabilizing, and thickening properties and are therefore frequently included in creams, ice creams, cheeses, jellies, flavored milks, sauces, shampoos, medications, toothpaste, and many other products. The phycocolloids agar and carrageenan are extracted from red algae, whereas alginate is extracted from brown algae, being used in dental impressions, emulsifying lotions, and paints, among others, and in the preparation of wine and beer. Algae are of particular interest in the research and development of new biosorbent materials, not only because of their high adsorption capacity, but also because they are present in the seas and oceans in abundant and easily accessible quantities. Marine algae are a promising biosorbent for the removal of heavy metals and various pollutants and, due to their intrinsic characteristics, have received increasing attention in recent decades. Their application as biosorbents for the sorption of heavy metals and radionuclides could be interpreted as the use of waste to remove waste. Algae have attracted particular interest in the field of biotechnology for economic reasons, given that large amounts are naturally produced and left lying on beaches as waste material. The composition of algae biomass makes it a promising candidate for an extensive list of applications that continues to lengthen. The development of appropriate technologies and policies can transform the presence of algae in coastal ecosystems from an unpleasant and potentially harmful phenomenon into a source of major benefits. This review discusses the capacity of algae biomass to remove pollutants and also delves into its applicability in the production of dyes, oils, and biofuels and for animal feed and fertilizer industries, among others. Further research is warranted on strategies to convert a biomass that is currently considered waste into a means of addressing environmental problems.
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Affiliation(s)
- Lázaro Adrián González Fernández
- Multidisciplinary Postgraduate Program in Environmental Sciences, Av. Manuel Nava 201, 2nd. floor, University Zone, 78000, San Luis Potosí, Mexico
| | - Ventura Castillo Ramos
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - Manuel Sánchez Polo
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - Nahum Andrés Medellín Castillo
- Multidisciplinary Postgraduate Program in Environmental Sciences, Av. Manuel Nava 201, 2nd. floor, University Zone, 78000, San Luis Potosí, Mexico; Center for Research and Postgraduate Studies of the Faculty of Engineering, Dr. Manuel Nava No. 8, West University Zone, 78290, San Luis Potosí, Mexico.
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Relevance of drying treatment on the extraction of high valuable compounds from invasive brown seaweed Rugulopteryx okamurae. ALGAL RES 2023. [DOI: 10.1016/j.algal.2022.102917] [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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Equilibrium and Thermodynamic Studies on the Biosorption of Lead (II) by Living and Nonliving Biomass of Penicillium notatum. J CHEM-NY 2022. [DOI: 10.1155/2022/3109212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
This study aims to investigate the biosorption of Pb (II) by living and nonliving biomass of Penicillium notatum. Penicillium notatum PTCC 5074 was purchased from Iran Scientific-Industrial Research Organization in lyophilized form and after culturing in potato dextrose agar was propagated in Sabouraud dextrose broth medium. The highest adsorption by living and nonliving biomass (180.74 and 187.08 mg/g per dry weight of biomass, respectively) was at the Pb (II) concentration of 228 mg/L and ionic strength of 43 mg/L in terms of Ca2+ and 1.2 g/L biomass concentration. The optimum contact time and temperature in nonliving biomass were 37 hours and 32.5°C, respectively. Kinetic studies showed that Pb(II) adsorption in both cases follows a pseudo-second-order reaction. The adsorption process was consistent with the Langmuir model in the nonliving state, whereas the favourite models for the living state were Langmuir and Freundlich. Thermodynamic constants indicated that the adsorption process by nonliving and living biomass were exothermic and endothermic, respectively. The obtained results showed that Penicillium notatum in living and nonliving states is suitable for the development of an efficient and economic biosorbent for the removal of Pb (II) from aqueous environments.
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Rocha CP, Pacheco D, Cotas J, Marques JC, Pereira L, Gonçalves AMM. Seaweeds as Valuable Sources of Essential Fatty Acids for Human Nutrition. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:4968. [PMID: 34067088 PMCID: PMC8124752 DOI: 10.3390/ijerph18094968] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/29/2021] [Accepted: 04/30/2021] [Indexed: 02/07/2023]
Abstract
The overexploitation of terrestrial habitats, combined with the ever-growing demand for food, has led to the search for alternative food sources. The importance of seaweeds as food sources has been growing, and their potential as sources of fatty acids (FA) make seaweeds an interesting feedstock for the food and nutraceutical industries. The aim of this study is to assess the potential of five red seaweeds (Asparagospis armata, Calliblepharis jubata, Chondracanthus teedei var. lusitanicus, Gracilaria gracilis, and Grateloupia turuturu) and three brown seaweeds (Colpomenia peregrina, Sargassum muticum and Undaria pinnatifida), harvested in central Portugal, as effective sources of essential FA for food or as dietary supplements. FA were extracted from the biomass, transmethylated to methyl esters, and analyzed through gas chromatography-mass spectrometry. G. gracilis presented the highest content of saturated fatty acids (SFA) (41.49 mg·g-1), whereas C. jubata exhibited the highest content of highly unsaturated fatty acids (HUFA) (28.56 mg·g-1); the three G. turuturu life cycle stages presented prominent SFA and HUFA contents. Omega-6/omega-3 ratios were assessed and, in combination with PUFA+HUFA/SFA ratios, it is suggested that C. jubata and U. pinnatifida may be the algae with highest nutraceutical potential, promoting health benefits and contributing to a balanced dietary intake of fatty acids.
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Affiliation(s)
- Carolina P. Rocha
- University of Coimbra, MARE—Marine and Environmental Sciences Centre, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; (C.P.R.); (D.P.); (J.C.); (J.C.M.); (L.P.)
| | - Diana Pacheco
- University of Coimbra, MARE—Marine and Environmental Sciences Centre, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; (C.P.R.); (D.P.); (J.C.); (J.C.M.); (L.P.)
| | - João Cotas
- University of Coimbra, MARE—Marine and Environmental Sciences Centre, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; (C.P.R.); (D.P.); (J.C.); (J.C.M.); (L.P.)
| | - João C. Marques
- University of Coimbra, MARE—Marine and Environmental Sciences Centre, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; (C.P.R.); (D.P.); (J.C.); (J.C.M.); (L.P.)
| | - Leonel Pereira
- University of Coimbra, MARE—Marine and Environmental Sciences Centre, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; (C.P.R.); (D.P.); (J.C.); (J.C.M.); (L.P.)
| | - Ana M. M. Gonçalves
- University of Coimbra, MARE—Marine and Environmental Sciences Centre, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; (C.P.R.); (D.P.); (J.C.); (J.C.M.); (L.P.)
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
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Alwared AI, Al-Musawi TJ, Muhaisn LF, Mohammed AA. The biosorption of reactive red dye onto orange peel waste: a study on the isotherm and kinetic processes and sensitivity analysis using the artificial neural network approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:2848-2859. [PMID: 32895791 DOI: 10.1007/s11356-020-10613-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/23/2020] [Indexed: 06/11/2023]
Abstract
The agricultural waste of orange peels (OPs) was utilized as a cheap biosorbent and then tested for its ability to treat the reactive red (RR) dye wastewater. Several experiments were done to get the equilibrium isotherm and kinetic-relevant data. In addition, several experimental factors such as solution pH, temperature, contact time, and initial RR dye concentration were studied, in light of their impact on the biosorption process. The utilized isotherm and kinetic models were evaluated by using the chi-square test and coefficient of determination parameters for their representation of real data. In addition, the obtained data of their biosorption capacities, at different conditions, were modeled by the artificial neural network (ANN) approach. The results of the isotherm study revealed that the experimental data can be best accounted by both the Langmuir and Temkin models, demonstrating that the RR molecules were sorbed to two or more different types of biosorption sites of OP. The kinetic study for determining the characteristics of the rate of diffusion demonstrated that the intraparticle diffusion process was not the sole rate-limiting step in the biosorption of the RR dye-OP couple. Furthermore, the biosorption process was chemisorption in nature, as the pseudo-second-order reaction proved to be the best representative model for the kinetic data. The outcome of modeling also assumed that using the ANN tool was useful to reproduce the data again and foretell the manner in which biosorption behaved. According to the results of the Langmuir model, it was found that the maximum OP uptake for the biosorption of the RR dye was up to 82 mg/g, observed at optimized values of the experimental parameters. Such prior results highlight that OP is an effective agent of biosorption in the elimination of RR dyes from polluted solutions, moreover, in a cost-effective manner.
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Affiliation(s)
- Abeer I Alwared
- Environmental Engineering Department, Baghdad University, Baghdad, Iraq
| | - Tariq J Al-Musawi
- Department of Civil Engineering, Faculty of Engineering, Isra University, Amman, Jordan.
| | - Laheib F Muhaisn
- Environmental Engineering Department, Al-Mustansiriya University, Baghdad, Iraq
| | - Ahmed A Mohammed
- Environmental Engineering Department, Baghdad University, Baghdad, Iraq
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Pacheco D, Araújo GS, Cotas J, Gaspar R, Neto JM, Pereira L. Invasive Seaweeds in the Iberian Peninsula: A Contribution for Food Supply. Mar Drugs 2020; 18:E560. [PMID: 33207613 PMCID: PMC7697577 DOI: 10.3390/md18110560] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/06/2020] [Accepted: 11/12/2020] [Indexed: 12/11/2022] Open
Abstract
The introduction of exotic organisms in marine ecosystems can lead to economic and ecological losses. Globally, seaweeds represent a significant part of these non-indigenous species (NIS), with 407 introduced algal species. Furthermore, the presence of NIS seaweeds has been reported as a major concern worldwide since the patterns of their potential invasion mechanisms and vectors are not yet fully understood. Currently, in the Iberian Peninsula, around 50 NIS seaweeds have been recorded. Some of these are also considered invasive due to their overgrowth characteristic and competition with other species. However, invasive seaweeds are suitable for industrial applications due to their high feedstock. Hence, seaweeds' historical use in daily food diet, allied to research findings, showed that macroalgae are a source of nutrients and bioactive compounds with nutraceutical properties. The main goal of this review is to evaluate the records of NIS seaweeds in the Iberian Peninsula and critically analyze the potential of invasive seaweeds application in the food industry.
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Affiliation(s)
- Diana Pacheco
- Department of Life Sciences, Marine and Environmental Sciences Centre (MARE), University of Coimbra, 3000-456 Coimbra, Portugal; (D.P.); (J.C.); (R.G.); (J.M.N.)
| | - Glacio Souza Araújo
- Federal Institute of Education, Science and Technology of Ceará–IFCE, Campus Aracati, CE 040, km 137,1, Aracati 62800-000, Ceará, Brazil;
| | - João Cotas
- Department of Life Sciences, Marine and Environmental Sciences Centre (MARE), University of Coimbra, 3000-456 Coimbra, Portugal; (D.P.); (J.C.); (R.G.); (J.M.N.)
| | - Rui Gaspar
- Department of Life Sciences, Marine and Environmental Sciences Centre (MARE), University of Coimbra, 3000-456 Coimbra, Portugal; (D.P.); (J.C.); (R.G.); (J.M.N.)
| | - João M. Neto
- Department of Life Sciences, Marine and Environmental Sciences Centre (MARE), University of Coimbra, 3000-456 Coimbra, Portugal; (D.P.); (J.C.); (R.G.); (J.M.N.)
| | - Leonel Pereira
- Department of Life Sciences, Marine and Environmental Sciences Centre (MARE), University of Coimbra, 3000-456 Coimbra, Portugal; (D.P.); (J.C.); (R.G.); (J.M.N.)
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Lin Z, Li J, Luan Y, Dai W. Application of algae for heavy metal adsorption: A 20-year meta-analysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 190:110089. [PMID: 31896472 DOI: 10.1016/j.ecoenv.2019.110089] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 11/22/2019] [Accepted: 12/11/2019] [Indexed: 06/10/2023]
Abstract
The use of algae to adsorb heavy metals is an efficient and environmentally friendly treatment for contaminated water and has attracted widespread research attention. In this study, a meta-analysis of the heavy metal adsorption capacity of algae from five different phyla and the factors influencing these capacities was conducted. Phaeophyta was found to have a high heavy metal adsorption capacity, whereas Bacillariophyta had a relatively low adsorption capacity; Chlorophyta, Rhodophyta, and Cyanophyta had moderate adsorption capacities. Non-living algae were more effective in practical applications than living algae were. Algal biomass had a relatively high adsorption efficiency of 1-10 g/L, which did not increase significantly when algal concentration increased. The algal adsorption efficiency for initial heavy metal concentrations of 10-100 mg/L was higher than for concentrations of greater than 100 mg/L. The results further show that algal adsorption of heavy metals reached a maximum capacity of 80-90% within 20 min. Heavy metal adsorption by algae was not temperature-dependent, and it was more effective in moderately to weakly acidic environments (pH = 4-7.5). Considering these aspects for practical applications, algae from some phyla can effectively be used for heavy metal biosorption in contaminated water.
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Affiliation(s)
- Zeyu Lin
- College of Forestry, Beijing Forestry University, Beijing, 100083, China
| | - Jing Li
- College of Forestry, Beijing Forestry University, Beijing, 100083, China
| | - Yaning Luan
- College of Forestry, Beijing Forestry University, Beijing, 100083, China
| | - Wei Dai
- College of Forestry, Beijing Forestry University, Beijing, 100083, China.
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Bio-prospectus of cadmium bioadsorption by lactic acid bacteria to mitigate health and environmental impacts. Appl Microbiol Biotechnol 2018; 102:1599-1615. [PMID: 29352397 DOI: 10.1007/s00253-018-8743-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 12/26/2017] [Accepted: 12/27/2017] [Indexed: 12/15/2022]
Abstract
Foodstuffs and water are the key sources of cadmium biomagnifiaction. The available strategies to mitigate this problem are unproductive and expensive for practical large-scale use. Biological decontamination of metals through environmental microbes has been known since long time, whereas lactic acid bacteria (LAB) have not been extensively studied for this purpose. The LAB are known for maintaining homeostasis and suppression of pathogens in humans and animals. They also play a vital role in bioremediation of certain heavy metals. Recently in-vivo research findings strongly complement the in-vitro results in relation to decreased total body cadmium burden in animal model. This review summarizes the currently available information on impact of toxic metal (Cd) on human and animal health as well as cadmium sequestration through microbes placed broadly, whereas preeminent attention grabbed on LAB-cadmium interaction to explore their possible role in bioremediation of cadmium from foods and environment to safeguard human as well as environment health.
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A Systematic Analysis and Review of the Fundamental Acid-Base Properties of Biosorbents. ENVIRONMENTAL CHEMISTRY FOR A SUSTAINABLE WORLD 2018. [DOI: 10.1007/978-3-319-92111-2_3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Vijayaraghavan K, Rangabhashiyam S, Ashokkumar T, Arockiaraj J. Assessment of samarium biosorption from aqueous solution by brown macroalga Turbinaria conoides. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.02.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Cukierman AL. Metal Ion Biosorption Potential of Lignocellulosic Biomasses and Marine Algae for Wastewater Treatment. ADSORPT SCI TECHNOL 2016. [DOI: 10.1260/026361707782398182] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Ana Lea Cukierman
- Programa de Investigación y Desarrollo de Fuentes Alternativas de Materias Primas y Energía (PINMATE), Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2620, Ciudad Universitaria, (C1428BGA) Buenos Aires, Argentina. Cátedra Farmacotecnia II — Tecnología Especial, Departamento de Tecnología Farmacéutica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956, (C1113AAD) Buenos Aires, Argentina
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Kim SY, Jin MR, Chung CH, Yun YS, Jahng KY, Yu KY. Biosorption of cationic basic dye and cadmium by the novel biosorbent Bacillus catenulatus JB-022 strain. J Biosci Bioeng 2015; 119:433-9. [DOI: 10.1016/j.jbiosc.2014.09.022] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 09/18/2014] [Accepted: 09/25/2014] [Indexed: 11/16/2022]
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14
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Soto M, Vázquez MA, de Vega A, Vilariño JM, Fernández G, de Vicente MES. Methane potential and anaerobic treatment feasibility of Sargassum muticum. BIORESOURCE TECHNOLOGY 2015; 189:53-61. [PMID: 25864031 DOI: 10.1016/j.biortech.2015.03.074] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 03/13/2015] [Accepted: 03/14/2015] [Indexed: 06/04/2023]
Abstract
The aim of this research was to study the feasibility of anaerobic digestion of the alga Sargassum muticum with special attention to its biodegradability, potential toxicity caused by its salt content, alga components and intermediate process compounds, and potential limitations to continuous treatment. Specific methane potential (SMP) for three samples of S. muticum collected from the Galician coast (Northwest Spain) at different seasons ranged from 166 to 208 mLCH4/gVS while accumulation of toxic compounds was not observed at alga concentrations of up to 100 gTS/L, except for one of the samples in which inhibition started at 80-100 gTS/L. Continuous digestion is feasible at alga concentration up to 100 gTS/L with methane production rates ranging from 0.14 to 0.26 LCH4/Ld at organic loading rates of 3.2 gTS/Ld, but SMP dropped to 113-159 mLCH4/gVS.
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Affiliation(s)
- M Soto
- Dept. of Physical Chemistry and Chemical Engineering I, University of A Coruña, Rúa da Fraga n° 10, 15008 A Coruña, Galiza, Spain.
| | - M A Vázquez
- Dept. of Physical Chemistry and Chemical Engineering I, University of A Coruña, Rúa da Fraga n° 10, 15008 A Coruña, Galiza, Spain
| | - A de Vega
- Dept. of Physical Chemistry and Chemical Engineering I, University of A Coruña, Rúa da Fraga n° 10, 15008 A Coruña, Galiza, Spain
| | - J M Vilariño
- INVESGA, S.L. Rúa Perseo n° 9, 15179 Oleiros, A Coruña, Spain
| | - G Fernández
- INVESGA, S.L. Rúa Perseo n° 9, 15179 Oleiros, A Coruña, Spain
| | - M E S de Vicente
- Dept. of Physical Chemistry and Chemical Engineering I, University of A Coruña, Rúa da Fraga n° 10, 15008 A Coruña, Galiza, Spain
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15
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Efficacy of physically pretreated Mangifera indica biomass for Cu2+ and Zn2+ sequestration. JOURNAL OF SAUDI CHEMICAL SOCIETY 2015. [DOI: 10.1016/j.jscs.2011.12.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Ataabadi M, Hoodaji M, Tahmourespour A, Kalbasi M, Abdouss M. Optimization of factors affecting hexavalent chromium removal from simulated electroplating wastewater by synthesized magnetite nanoparticles. ENVIRONMENTAL MONITORING AND ASSESSMENT 2015; 187:4165. [PMID: 25471623 DOI: 10.1007/s10661-014-4165-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 11/17/2014] [Indexed: 06/04/2023]
Abstract
Hexavalent chromium is a mutagen and carcinogen that is of significant concern in water and wastewater. In the present study, magnetite nanoparticles (n-Mag) were investigated as a potential remediation technology for the decontamination of Cr (VI)-contaminated wastewater. Synthesized n-Mag was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET-N2 technology. To screen and optimize the factors affecting Cr (VI) removal efficiency by synthesized nanoparticles, Plackett-Burman (PB) and Taguchi experimental designs were used respectively. The crystalline produced n-Mag was in the size range of 60-70 nm and had a specific surface area (SSA) of 31.55 m(2) g(-1). Results of PB design showed that the most significant factors affecting Cr (VI) removal efficiency were initial Cr (VI) concentration, pH, n-Mag dosage, and temperature. In a pH of 2, 20 mg L(-1) of Cr (VI) concentration, 4 g L(-1)of n-Mag, temperature of 40 °C, 220 rpm of shaking speed, and 60 min of contact time, the complete removal efficiency of Cr (VI) was achieved. Batch experiments revealed that the removal of Cr (VI) by n-Mag was consistent with pseudo-second order reaction kinetics. The competition from common coexisting ions such as NO₃(-), SO₄(2-), and Cl(-) were not considerable, unless in the higher concentration of SO₄(2-). These results indicated that the readily synthesized magnetite nanoparticles have promising applications for the removal of Cr (VI) from aqueous solution.
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Affiliation(s)
- Mitra Ataabadi
- Soil Sciences Department, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran (IR)
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Chen F, Tan N, Yan XM, Yang SK, She ZG, Lin YC. Uranium(VI) Removal from Aqueous Solution by Poly(Amic Acid)-Modified Marine Fungus. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2013.877033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Decreasing Fe0 and Fe3O4 nano particle size by simultaneous synthesis on a bio-polymeric structure: Kinetic study to remove Amaranth from aqueous solution. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.01.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Synthesis of a carbamide-based dithiocarbamate chelator for the removal of heavy metal ions from aqueous solutions. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.05.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sulaymon AH, Mohammed AA, Al-Musawi TJ. Comparative Study of Removal of Cadmium (II) and Chromium (III) Ions from Aqueous Solution Using Low-Cost Biosorbent. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2014. [DOI: 10.1515/ijcre-2014-0024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This study aims to evaluate the ability of abundant low-cost garden grass to remove cadmium and chromium ions from aqueous solutions. Batch biosorption studies were carried out to examine the biosorption capacity, pH value, temperature, agitation speed, and metal ions concentration. The biosorption process revealed that the garden grass was an effective biosorbent of cadmium and chromium. The maximum chromium and cadmium removal rate was 90 and 80% at pH 4, respectively. FTIR spectroscopy analysis showed that the hydroxyl, amine, and carboxyl groups were the major groups responsible for the biosorption process. The maximum biosorption capacity was 18.19 and 19.4 mg/g for cadmium and chromium, respectively. The biosorption isotherm data fitted well the Langmuir model. Kinetic data were adequately fitted by the pseudo-second-order kinetic model.
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Won SW, Choi SB, Yun YS. On the reason why acid treatment of biomass enhances the biosorption capacity of cationic pollutants. KOREAN J CHEM ENG 2013. [DOI: 10.1007/s11814-013-0184-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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López-García M, Lodeiro P, Herrero R, Barriada JL, Rey-Castro C, David C, Sastre de Vicente ME. Experimental evidences for a new model in the description of the adsorption-coupled reduction of Cr(VI) by protonated banana skin. BIORESOURCE TECHNOLOGY 2013; 139:181-9. [PMID: 23665682 DOI: 10.1016/j.biortech.2013.04.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 04/11/2013] [Accepted: 04/11/2013] [Indexed: 05/02/2023]
Abstract
This work reports experimental evidences, not previously considered, to evaluate the Cr(VI) removal by protonated banana skin biomass. Variations in the number of hydroxyl groups, quantified by potentiometric titrations, and CO2 evolution during experiments, were attributed mainly to the oxidation of hydroxylic entities present in the studied material. The results indicate that these groups together with the carboxylic moieties are the main functionalities involved on the adsorption-coupled reduction process. The column experiment carried out provides a new approach to obtain the maximum reduction capacity of the material (3.72 mmol g(-1)). Moreover, we hereby propose a model that reports the first evidence for the instant bound of Cr(III) species to the material used, formed after the reduction of Cr(VI) present in solution. The removal process was quantified carrying out experiments under various pHs, biomass doses and Cr(VI) concentrations, and the mechanism underlying chromium removal was identified.
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Affiliation(s)
- Marta López-García
- Departamento de Química Física e Enxeñaría Química I, Universidade de A Coruña, Rúa da Fraga 10, 15008 A Coruña, Spain
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Subbaiah MV, Yun YS. Biosorption of Nickel(II) from aqueous solution by the fungal mat of Trametes versicolor (rainbow) biomass: equilibrium, kinetics, and thermodynamic studies. BIOTECHNOL BIOPROC E 2013. [DOI: 10.1007/s12257-012-0401-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Lodeiro P, López-García M, Herrero L, Barriada JL, Herrero R, Cremades J, Bárbara I, Sastre de Vicente ME. A physicochemical study of Al(+3) interactions with edible seaweed biomass in acidic waters. J Food Sci 2012; 77:C987-93. [PMID: 22900947 DOI: 10.1111/j.1750-3841.2012.02855.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
UNLABELLED In this article, a study of the Al(+3) interactions in acidic waters with biomass of different edible seaweeds: brown (Fucus vesiculosus, Saccorhiza polyschides), red (Mastocarpus stellatus, Gelidium sesquipedale, Chondrus crispus), and green (Ulva rigida, Codium tomentosum), has been performed. The influence of both, the initial concentration of metal and the solution pH, on the Al-uptake capacity of the biomass has been analyzed. From preliminary tests, species Fucus vesiculosus and Gelidium sesquipedale have been selected for a more exhaustive analysis. Sorption kinetic studies demonstrated that 60 min are enough to reach equilibrium. The intraparticle diffusion model has been used to describe kinetic data. Equilibrium studies have been carried out at pH values of 1, 2.5, and 4. Langmuir isotherms showed that the best uptake values, obtained at pH 4, were 33 mg/g for F. vesiculosus and 9.2 mg/g for G. sesquipedale. These edible seaweeds have been found particularly effective in binding aluminum metal ions for most of the conditions tested. Physicochemical data reported at these low pH values could be of interest, not only in modeling aluminum-containing antacids-food pharmacokinetic processes produced in the stomach (pH values 1 to 3) but in remediation studies in acidic waters. PRACTICAL APPLICATION Aluminum is thought to be linked to neurological disruptions such as Alzheimer's disease. In this article, the adsorption ability of different types of edible seaweeds toward aluminum has been studied. The choice of low pH values is due to the fact that stomach region is acidic with a pH value between 1 and 3 as a consequence of hydrochloric secretion; so physicochemical data reported in this study could be of interest in modeling drug-food interactions, in particular those referring to aluminum-containing antacids-food pharmacokinetic processes produced in the gastrointestinal tract.
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Affiliation(s)
- Pablo Lodeiro
- Dept de Química Física e Enxeñaría Química I, Univ de A Coruña, Rúa da Fraga 10, 15008 A Coruña, Spain.
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López-García M, Lodeiro P, Herrero R, Sastre de Vicente ME. Cr(VI) removal from synthetic and real wastewaters: The use of the invasive biomass Sargassum muticum in batch and column experiments. J IND ENG CHEM 2012. [DOI: 10.1016/j.jiec.2012.01.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Masoudzadeh N, Zakeri F, Lotfabad TB, Sharafi H, Masoomi F, Zahiri HS, Ahmadian G, Noghabi KA. Biosorption of cadmium by Brevundimonas sp. ZF12 strain, a novel biosorbent isolated from hot-spring waters in high background radiation areas. JOURNAL OF HAZARDOUS MATERIALS 2011; 197:190-198. [PMID: 21983169 DOI: 10.1016/j.jhazmat.2011.09.075] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 09/18/2011] [Accepted: 09/19/2011] [Indexed: 05/31/2023]
Abstract
The aim of this study is to screen cadmium biosorbing bacterial strains isolated from soils and hot-springs containing high concentrations of radium ((226)Ra) in Ramsar using a batch system. Brevundimonas sp. ZF12 strain isolated from the water with high (226)Ra content caused 50% removal of cadmium at a concentration level of 250 ppm. The biosorption equilibrium data are fitted well by the Langmuir adsorption isotherm and kinetic studies indicated that the biosorption follows pseudo second-order model. The effect of different physico-chemical parameters like biomass concentration, pH, cadmium concentration, temperature and contact time on cadmium sorption was also investigated using FTIR, SEM and XRD analytical techniques. A high desorption efficiency (above 90%) was obtained using a pH range of 2.0-4.0. Reusability of the biomass was examined under consecutive biosorption-desorption cycles repeated thrice. In conclusion, Brevundimonas sp. ZF12 is proposed as an excellent cadmium biosorbent that may have important applications in Cd removal from wastewaters.
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Affiliation(s)
- Nasrin Masoudzadeh
- Department of Molecular Genetics, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
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Khani MH. Uranium biosorption by Padina sp. algae biomass: kinetics and thermodynamics. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2011; 18:1593-605. [PMID: 21607729 DOI: 10.1007/s11356-011-0518-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Accepted: 04/26/2011] [Indexed: 05/30/2023]
Abstract
INTRODUCTION Kinetic, thermodynamic, and equilibrium isotherms of the biosorption of uranium ions onto Padina sp., a brown algae biomass, in a batch system have been studied. DISCUSSION The kinetic data were found to follow the pseudo-second-order model. Intraparticle diffusion is not the sole rate-controlling factor. The equilibrium experimental results were analyzed in terms of Langmuir isotherm depending with temperature. Equilibrium data fitted very well to the Langmuir model. The maximum uptakes estimated by using the Langmuir model were 434.8, 416.7, 400.0, and 370.4 mg/g at 10°C, 20°C, 30°C, and 40°C, respectively. Gibbs free energy was spontaneous for all interactions, and the adsorption process exhibited exothermic enthalpy values. Padina sp. algae were shown to be a favorable biosorbent for uranium removal from aqueous solutions.
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Affiliation(s)
- Mohammad Hassan Khani
- Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, PO Box 14395, 836 Tehran, Iran.
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Carro L, Barriada JL, Herrero R, Sastre de Vicente ME. Adsorptive behaviour of mercury on algal biomass: competition with divalent cations and organic compounds. JOURNAL OF HAZARDOUS MATERIALS 2011; 192:284-91. [PMID: 21621916 DOI: 10.1016/j.jhazmat.2011.05.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/06/2011] [Accepted: 05/06/2011] [Indexed: 05/30/2023]
Abstract
Biosorption processes constitute an effective technique for mercury elimination. Sorption properties of native and acid-treated Sargassum muticum have been studied. Effect of pH, initial mercury concentration and contact time studies provided fundamental information about the sorption process. This information was used as the reference values to analyse mercury sorption under competition conditions. Saline effect has shown little influence in sorption, when only electrostatic modifications took place upon salt addition. On the contrary, if mercury speciation dramatically changed owing to the addition of an electrolyte, such as in the case of chloride salt, very large modifications in mercury sorption were observed. Competition with other divalent cations or organic compounds has shown little or none effect on mercury, indicating that a different mechanism is taking place during the removal of these pollutants. Finally, continuous flow experiments have clearly shown that a reduction process is also taking place during mercury removal. This fact is not obvious to elucidate under batch sorption experiments. Scanning Electron Microscopy analysis of the surface of the materials show deposits of mercury(I) and metallic mercury which is indicative of the reduction process proposed.
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Affiliation(s)
- Leticia Carro
- Departamento de Química Física e Ingeniería Química I, Universidad de A Coruña, c/Rúa da Fraga 10, 15008 A Coruña, Spain
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29
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Boschi C, Maldonado H, Ly M, Guibal E. Cd(II) biosorption using Lessonia kelps. J Colloid Interface Sci 2011; 357:487-96. [PMID: 21376338 DOI: 10.1016/j.jcis.2011.01.108] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Revised: 01/28/2011] [Accepted: 01/31/2011] [Indexed: 11/18/2022]
Abstract
Lessonia kelps (L. trabeculata and L. nigrescens) have been successfully used for the recovery of Cd(II) from near neutral solutions. The biomass was pre-treated with calcium chloride for stabilization of alginate-based compounds. SEM-EDAX analysis and FT-IR spectrometry analysis were used for identifying the modifications of the biomass. Sorption isotherms were performed at the optimum pH (i.e., pH 6) and the maximum sorption capacity reached up to 1 and 1.5 mmol Cd g(-1) for L. nigrescens (L.n.) and L. trabeculata (L.t.), respectively. The Langmuir equation fits well experimental data. The temperature (in the range 20-40 °C) had a more marked effect on affinity coefficient than on maximum sorption capacity. The influence of particle size, sorbent dosage, metal concentration and temperature was evaluated on uptake kinetics. The kinetic profiles that were modeled using the Crank equation (i.e., the resistance to intraparticle diffusion) were hardly affected by the temperature and the particle size contrary to the sorbent dosage and the metal concentration, which show greater impact. The pseudo-second order rate equation was also tested for the modeling of uptake kinetics.
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Affiliation(s)
- Carmen Boschi
- Ecole des Mines d'Alès, Laboratoire Génie de l'Environnement Industriel, Equipe BPCI, 6 avenue de Clavières, F-30319 ALES cedex, France
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Herrero R, Lodeiro P, García-Casal LJ, Vilariño T, Rey-Castro C, David C, Rodríguez P. Full description of copper uptake by algal biomass combining an equilibrium NICA model with a kinetic intraparticle diffusion driving force approach. BIORESOURCE TECHNOLOGY 2011; 102:2990-7. [PMID: 20980146 DOI: 10.1016/j.biortech.2010.10.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2010] [Revised: 09/30/2010] [Accepted: 10/02/2010] [Indexed: 05/30/2023]
Abstract
In this work kinetic and equilibrium studies related to copper binding to the protonated macroalga Sargassum muticum are reported. An intraparticle-diffusion linear driving force (LDF) model has been chosen for the quantitative description of the kinetics at several initial metal concentrations. Copper intraparticle homogeneous diffusion coefficient (D(h)) obtained is in the range 0.2-0.9×10(-10) m(2) s(-1). NICA isotherm is demonstrated to constitute a substantial improvement with respect to a simpler Langmuir competitive equation. The binding parameters were chosen to provide the best simultaneous description of the equilibrium experiments. Values of log K(Cu) (4.3), n(Cu) (1) and p (0.31) in NICA isotherm, and log K(Cu) (3.5-5) in Langmuir competitive model, have been obtained. These parameters have been also used to predict the competition between copper and cadmium for binding sites. Two acids, HNO(3) and HCl, have been tested to evaluate their effectiveness to release copper from the metal-laden biomass.
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Affiliation(s)
- Roberto Herrero
- Departamento de Química Física e Enxeñería Química I, Universidade da Coruña, Coruña, Spain
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31
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Carro L, Anagnostopoulos V, Lodeiro P, Barriada JL, Herrero R, Sastre de Vicente ME. A dynamic proof of mercury elimination from solution through a combined sorption-reduction process. BIORESOURCE TECHNOLOGY 2010; 101:8969-8974. [PMID: 20656478 DOI: 10.1016/j.biortech.2010.06.118] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Revised: 06/15/2010] [Accepted: 06/25/2010] [Indexed: 05/29/2023]
Abstract
Physico-chemical factors affecting mercury elimination from solution using fern as sorbent have been analysed. It was demonstrated that interaction of mercury with this biomass follows two processes, adsorption by the functional groups in the biopolymers of the cell wall and reduction by easily oxidized compounds of the biomass. Batch experiments have been done to analyse the effect of pH, ionic strength of the media or competition with other metals. Ionic strength did not show a significant influence in the process, but mercury speciation with the formation of negatively charge complexes represented an important drawback in metal elimination. Continuous flow conditions were also analysed since many industrial applications will require them. These studies allowed distinguishing the two processes: mercury sorption was observed but also reduction of this metal occurs. Reduction to mercury (I) and metallic mercury has been confirmed by scanning electron microscopy analysis of the column filling after the continuous flow experiments.
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Affiliation(s)
- Leticia Carro
- Departamento de Química Física e Ingeniería Química I, Universidad de A Coruña, c/Alejandro de la Sota 1, 15008 A Coruña, Spain
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Mokaddem H, Sadaoui Z, Boukhelata N, Azouaou N, Kaci Y. Removal of Cadmium from aqueous solution by polysaccharide produced from Paenibacillus polymyxa. JOURNAL OF HAZARDOUS MATERIALS 2009; 172:1150-1155. [PMID: 19713040 DOI: 10.1016/j.jhazmat.2009.07.116] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2009] [Revised: 07/23/2009] [Accepted: 07/27/2009] [Indexed: 05/28/2023]
Abstract
This paper deals with the removal of Cadmium from aqueous solutions by polysaccharide produced from Paenibacillus polymyxa. The effects of contact time, initial metal ions concentration, mass of the polysaccharide and pH were studied. The Freundlich and Dubinin-Radushkevich (D-R) models have been applied and the equilibrium adsorption was found to best fit the Dubinin-Radushkevich adsorption isotherm based on the coefficient of correlation, R(2). The maximum Cd(2+) uptake was 520.09 mg g(-1). An empirical modeling was performed by using a 2(3) full factorial design and a regression equation for adsorption of Cd(2+) was determined from the data. The pH and the initial concentration of Cadmium are the most significant parameters affecting Cd(2+) adsorption followed by the mass of the polysaccharide.
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Affiliation(s)
- H Mokaddem
- Laboratoire de Génie de la Réaction, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediène, Bab Ezzouar 16111, Alger Algeria.
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Murphy V, Hughes H, McLoughlin P. Enhancement strategies for Cu(II), Cr(III) and Cr(VI) remediation by a variety of seaweed species. JOURNAL OF HAZARDOUS MATERIALS 2009; 166:318-326. [PMID: 19121898 DOI: 10.1016/j.jhazmat.2008.11.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Revised: 09/12/2008] [Accepted: 11/10/2008] [Indexed: 05/27/2023]
Abstract
Various chemical treatments have been applied to six brown, red and green seaweed species with a view to enhancing their metal removal for Cu(II), Cr(III) and Cr(VI). Treatment with acetone resulted in the greatest enhancement for both cationic and anionic species with relatively low mass losses (15-35%), indicating its low risk to biomass operational stability. Cation binding was increased by 69%, while the total Cr removal was augmented by 15%. Cr(VI) binding was shown to be an adsorption-coupled reduction, whereby Cr(VI) was bound to the biomass surface at pH 2 and subsequently reduced to Cr(III). Acetone treatment also resulted in biomasses that were capable of converting up to 83% of Cr(VI) in solution to Cr(III). Blocking of carboxyl and amino functionalities had significant negative effects both on total Cr removal as well as percentage conversion of Cr(VI) to Cr(III). Results therefore indicated the significant role played by these moieties in metal binding to these seaweeds. Potentiometric titrations displayed agreement between the degree of esterification and the decrease in Cu(II) removal for Ulva spp. and Polysiphonia lanosa. FTIR analysis identified changes in biomass functionality and availability after chemical modification, the results of which were in agreement with metal removal studies. In conclusion, these biosorbents represent suitable candidates to replace conventional removal technologies for metal bearing wastewaters, in particular for the detoxification of hazardous Cr(VI) waste streams.
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Affiliation(s)
- V Murphy
- Estuarine Research Group, Department of Chemical and Life Sciences, Waterford Institute of Technology, Cork Road, Waterford, Ireland.
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Rakhshaee R, Giahi M, Pourahmad A. Studying effect of cell wall's carboxyl-carboxylate ratio change of Lemna minor to remove heavy metals from aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2009; 163:165-173. [PMID: 18722059 DOI: 10.1016/j.jhazmat.2008.06.074] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Revised: 05/23/2008] [Accepted: 06/19/2008] [Indexed: 05/26/2023]
Abstract
The pre-treated Lemna minor can remove Hg(II), Cr(III), Cr(VI) and Cu(II) from the aqueous solution. The concentration determination of carboxyl and carboxylate groups and its rule to change the metal ions uptake was done by the curves of the potentiometric titration. It was shown that the removal percent of the heavy metal ions (Co=1.00 mM) increased 25.1, 26.0, 17.2 and 24.1% for these ions, respectively, with increasing the carboxylate from 0.92 to 2.42 mmol/g L. minor and then activating by the activator chloride salts. The removal percent of these ions was decreased 33.1, 27.5, 20.7 and 15.01%, respectively, with increasing the carboxyl from 1.50 to 2.41 mmol/g L. minor, inspite of activating by the chloride salts. The enthalpy change (DeltaH) was -27.43, -25.94, -28.12 and -22.27 kJ/mol and the entropy change (DeltaS) was 81.3, 79.9, 86.1 and 67.7 J/mol K, by activated biomass, respectively. L. minor removed these heavy metals corresponding to pseudo-second-order kinetic model that the activation energy (E(a)) was obtained 18.59, 15.93, 20.36 and 21.12 kJ/mol by the activated and 23.02, 22.27, 23.98 and 24.46 kJ/mol by the reference biomass to uptake Hg(II), Cr(III), Cr(VI) and Cu(II), respectively.
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Affiliation(s)
- Roohan Rakhshaee
- Department of Chemistry, Faculty of Science, Islamic Azad University, Rasht Branch, Pol-e-taleshan, Rasht, Iran.
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Barriada JL, Caridad S, Lodeiro P, Herrero R, Sastre de Vicente ME. Physicochemical characterisation of the ubiquitous bracken fern as useful biomaterial for preconcentration of heavy metals. BIORESOURCE TECHNOLOGY 2009; 100:1561-1567. [PMID: 18954980 DOI: 10.1016/j.biortech.2008.09.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Revised: 09/11/2008] [Accepted: 09/17/2008] [Indexed: 05/27/2023]
Abstract
Batch experiments with dry bracken fern have been done to determine cadmium and lead sequestering capacity of this biomaterial. Biomass characterisation was done by infrared spectroscopy and potentiometric analysis. The effect of pH of the metal containing solution, contact time and initial metal concentration has been studied, together with the acid-base properties of the biomaterial. Results obtained have been analysed using mathematical and modelling techniques. Effect of pH on metal sequestration has been correlated with observed acid-base properties of the natural substrate. Kinetic data analysis provided relevant information about metal sequestration rate, showing important differences between lead and cadmium. Maximum uptake was found to be the same for both metals 0.410 mmol/g. This value was also clearly correlated to the number of acidic groups determined for this material which was found to be 0.432 mmol of acidic groups per gram of fern. Results obtained indicate that acidic groups are the functional groups responsible of the sequestration of metal ions and that bracken fern is a promising material for metal preconcentration.
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Affiliation(s)
- Jose L Barriada
- Instituto Universitario de Medio Ambiente, Universidad de A Coruña, Pazo de Lóngora 15179, Oleiros, A Coruña, Spain
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Fan T, Liu Y, Feng B, Zeng G, Yang C, Zhou M, Zhou H, Tan Z, Wang X. Biosorption of cadmium(II), zinc(II) and lead(II) by Penicillium simplicissimum: Isotherms, kinetics and thermodynamics. JOURNAL OF HAZARDOUS MATERIALS 2008; 160:655-661. [PMID: 18455299 DOI: 10.1016/j.jhazmat.2008.03.038] [Citation(s) in RCA: 216] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2007] [Revised: 01/23/2008] [Accepted: 03/12/2008] [Indexed: 05/26/2023]
Abstract
The isotherms, kinetics and thermodynamics of Cd(II), Zn(II) and Pb(II) biosorption by Penicillium simplicissimum were investigated in a batch system. The effects of pH, initial metal ions concentration, biomass dose, contact time, temperature and co-ions on the biosorption were studied. Adsorption data were well described by both the Redlich-Peterson and Langmuir model. Chemical ion-exchange was found to be an important process based on free energy value from Dubini-Radushkevich isotherm for all metal ions. The results of the kinetic studies of all metal ions at different temperature showed that the rate of adsorption followed the pseudo second-order kinetics well. The thermodynamics constants DeltaG degrees , DeltaH degrees and DeltaS degrees of the adsorption process showed that biosorption of Cd(II), Zn(II) and Pb(II) ions on Penicillium simplicissimum were endothermic and spontaneous.
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Affiliation(s)
- Ting Fan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China
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Interaction of mercury with chitin: A physicochemical study of metal binding by a natural biopolymer. REACT FUNCT POLYM 2008. [DOI: 10.1016/j.reactfunctpolym.2008.09.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Fiset JF, Blais JF, Riveros PA. Review on the Removal of Metal Ions from Effluents Using Seaweeds, Alginate Derivatives and Other Sorbents. ACTA ACUST UNITED AC 2008. [DOI: 10.7202/018776ar] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
AbstractBiosorbents, especially those derived from seaweed (macroscopic algae) and alginate derivatives, exhibit high affinity for many metal ions. Because biosorbents are widely abundant (usually biodegradable) and less expensive than industrial synthetic adsorbents, they hold great potential for the removal of toxic metals from industrial effluents. Various studies have demonstrated the efficiency of living and non-living micro-organisms, such as bacteria, yeasts, moulds, micro-algae, cyanobacteria and biomass from water treatment sewage to remove metals from solution. Several types of organic and inorganic biomass have also been used as sorbent materials. In addition, by-products from the forestry industry, as well as agriculture waste and natural sorbents, have also been studied. This paper reviews and summarizes some key recent developments in these areas and it describes and discusses some specific applications of selected natural sorbents.
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Vijayaraghavan K, Yun YS. Competition of Reactive red 4, Reactive orange 16 and Basic blue 3 during biosorption of Reactive blue 4 by polysulfone-immobilized Corynebacterium glutamicum. JOURNAL OF HAZARDOUS MATERIALS 2008; 153:478-86. [PMID: 17913354 DOI: 10.1016/j.jhazmat.2007.08.079] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2007] [Revised: 08/28/2007] [Accepted: 08/28/2007] [Indexed: 05/17/2023]
Abstract
Competition of Reactive red 4 (RR4), Reactive orange 16 (RO16) and Basic blue 3 (BB3) during biosorption of Reactive blue 4 (RB4) by polysulfone-immobilized protonated Corynebacterium glutamicum (PIPC) was investigated in batch and column mode of operations. Through potentiometric titrations, and with the aid of proton-binding model, carboxyl, phosphonate and amine were identified as functional groups of PIPC, with apparent pK(a) values of 3.47+/-0.05, 7.08+/-0.07 and 9.90+/-0.05 mmol/g, respectively. Since reactive dyes release dye anions (ROSO(3)(-)) in solutions, the positively charged amine groups were responsible for biosorption. PIPC favored biosorption at pH 3 when RB4 was studied/used as single-solute; while the presence of RR4 and RO16 severely affected the RB4 biosorption. When present as a single-solute, PIPC recorded 184.5mg RB4/g; while PIPC exhibited 126.9, 120.9 and 169.6 mg RB4/g in the presence of RR4, RO16 and BB3, respectively. In general, the accessibility of amine group depends on the molecular size, number of sulfonate groups and reactivity of each reactive dye. Single and multicomponent Freundlich equations successfully described the biosorption isotherms. With 0.1M NaOH, it is possible to reuse PIPC for RB4 biosorption in 10 repeated cycles. Column experiments in an up-flow packed column coincided with batch results, that is PIPC showed strong preference towards highly reactive and relatively small RB4 anions; however, the presence of competing dyes hinder the RB4 column biosorption performance.
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Affiliation(s)
- K Vijayaraghavan
- Division of Environmental and Chemical Engineering, Research Institute of Industrial Technology, Chonbuk National University, Chonju, South Korea.
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Freitas OMM, Martins RJE, Delerue-Matos CM, Boaventura RAR. Removal of Cd(II), Zn(II) and Pb(II) from aqueous solutions by brown marine macro algae: kinetic modelling. JOURNAL OF HAZARDOUS MATERIALS 2008; 153:493-501. [PMID: 17935878 DOI: 10.1016/j.jhazmat.2007.08.081] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Revised: 08/25/2007] [Accepted: 08/29/2007] [Indexed: 05/25/2023]
Abstract
Specific marine macro algae species abundant at the Portuguese coast (Laminaria hyperborea, Bifurcaria bifurcata, Sargassum muticum and Fucus spiralis) were shown to be effective for removing toxic metals (Cd(II), Zn(II) and Pb(II)) from aqueous solutions. The initial metal concentrations in solution were about 75-100 mg L(-1). The observed biosorption capacities for cadmium, zinc and lead ions were in the ranges of 23.9-39.5, 18.6-32.0 and 32.3-50.4 mg g(-1), respectively. Kinetic studies revealed that the metal uptake rate was rather fast, with 75% of the total amount occurring in the first 10 min for all algal species. Experimental data were well fitted by a pseudo-second order rate equation. The contribution of internal diffusion mechanism was significant only to the initial biosorption stage. Results indicate that all the studied macro algae species can provide an efficient and cost-effective technology for eliminating heavy metals from industrial effluents.
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Affiliation(s)
- Olga M M Freitas
- LRSE, Laboratory of Separation and Reaction Engineering, Faculdade de Engenharia da Universidade do Porto, Porto, Portugal
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Quintelas C, Fernandes B, Castro J, Figueiredo H, Tavares T. Biosorption of Cr(VI) by three different bacterial species supported on granular activated carbon: a comparative study. JOURNAL OF HAZARDOUS MATERIALS 2008; 153:799-809. [PMID: 17933461 DOI: 10.1016/j.jhazmat.2007.09.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2007] [Revised: 09/05/2007] [Accepted: 09/05/2007] [Indexed: 05/25/2023]
Abstract
The ability of three different bacterial species supported on granular activated carbon (GAC) to remove hexavalent chromium from low concentration liquid solutions was investigated, in batch and column studies. The microorganisms tested were Cr(VI) reducing types: Streptococcus equisimilis (CECT 926), Bacillus coagulans (CECT 12) and Escherichia coli (CECT 515). The results showed metal uptake values of 5.82, 5.35 and 4.12 mg/g(bios.), respectively, for S. equisimilis, B. coagulans and E. coli, for an initial metal concentration of 100 mg/l. In the same order and for the initial concentration of 50 mg/l, metal uptake values were 2.33, 1.98 and 3.60 mg/g(bios.). Finally, for the initial metal concentration of 10 mg/l, those values were, respectively, 0.66, 1.51 and 1.12 mg/g(bios.). Studies made with an industrial effluent, with the aim of testing these biofilms in a real situation, showed values of Cr uptake of 0.083, 0.090 and 0.110 mg/g(bios.), respectively, for S. equisimilis, B. coagulans and E. coli, for an initial concentration of 4.2 mg/l of total Cr. The quantification of polysaccharides, playing a key role in the whole process, was made and it was concluded that the production of polysaccharides is higher for B. coagulans followed by S. equisimilis and E. coli (9.19, 7.24 and 4.77 mg/g(bios.)). The batch studies data were described using the Freundlich, Langmuir, Redlich-Peterson, Dubinin-Radushkevich, Sips and Toth model isotherms. The best fit was obtained with Sips and Toth model isotherms, respectively, for the S. equisimilis and for the B. coagulans biofilms. For the E. coli biofilm the Freundlich, Redlich-Peterson, Sips and Toth models fitted very well to the experimental data. The Adams-Bohart, Wolborska and Yoon and Nelson models were applied to column studies data. Those models were found suitable for describing the dynamic behaviour of the columns with respect to the inlet chromium concentration. Obtained results showed that the biofilms tested are very promising for the removal of Cr(VI) in diluted industrial wastewater. Despite differences in the cell wall structure and composition, the three bacteria exhibit comparable sorption affinities towards chromium, in the open systems studies. The Gram-positive bacteria tested (B. coagulans and S. equisimilis) presented best metal removal percentages in batch studies.
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Affiliation(s)
- C Quintelas
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, Universidade do Minho, Campus de Gualtar, Braga, Portugal.
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Murphy V, Hughes H, McLoughlin P. Comparative study of chromium biosorption by red, green and brown seaweed biomass. CHEMOSPHERE 2008; 70:1128-34. [PMID: 17884133 DOI: 10.1016/j.chemosphere.2007.08.015] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Revised: 08/08/2007] [Accepted: 08/09/2007] [Indexed: 05/17/2023]
Abstract
Dried biomass of the macroalgae Fucus vesiculosus and Fucus spiralis (brown), Ulva spp. (comprising Ulva linza, Ulva compressa and Ulva intestinalis) and Ulva lactuca (green), Palmaria palmata and Polysiphonia lanosa (red) were studied in terms of their chromium biosorption performance. Metal sorption was highly pH dependent with maximum Cr(III) and Cr(VI) sorption occurring at pH 4.5 and pH 2, respectively. Extended equilibrium times were required for Cr(VI) binding over Cr(III) binding (180 and 120min, respectively) thus indicating possible disparities in binding mechanism between chromium oxidation states. The red seaweed P. palmata revealed the highest removal efficiency for both Cr(III) and Cr(VI) at low initial concentrations. However, at high initial metal concentrations F. vesiculosus had the greatest removal efficiency for Cr(III) and performed almost identically to P. lanosa in terms of Cr(VI) removal. The Langmuir Isotherm mathematically described chromium binding to the seaweeds where F. vesiculosus had the largest q(max) for Cr(III) sorption (1.21mmol g(-1)) and P. lanosa had the largest Cr(VI) uptake (0.88mmol g(-1)). P. palmata had the highest affinity for both Cr(III) and Cr(VI) binding with b values of 4.94mM(-1) and 8.64mM(-1), respectively. Fourier transform infrared analysis revealed interactions of amino, carboxyl, sulphonate and hydroxyl groups in chromium binding to Ulva spp. The remaining seaweeds showed involvement of these groups to varying degrees as well as ether group participation in the brown seaweeds and for Cr(VI) binding to the red seaweeds.
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Affiliation(s)
- V Murphy
- Estuarine Research Group, Department of Chemical and Life Sciences, Waterford Institute of Technology, Cork Road, Waterford, Ireland.
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Nasir MH, Nadeem R, Akhtar K, Hanif MA, Khalid AM. Efficacy of modified distillation sludge of rose (Rosa centifolia) petals for lead(II) and zinc(II) removal from aqueous solutions. JOURNAL OF HAZARDOUS MATERIALS 2007; 147:1006-14. [PMID: 17363153 DOI: 10.1016/j.jhazmat.2007.01.131] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2006] [Revised: 01/27/2007] [Accepted: 01/29/2007] [Indexed: 05/14/2023]
Abstract
Removal of lead(II) and zinc(II) from aqueous solutions was studied using chemically modified distillation sludge of rose (Rosa centifolia) petals by pretreatment with NaOH, Ca(OH)(2), Al(OH)(3), C(6)H(6), C(6)H(5)CHO and HgCl(2). The adsorption capacity of biomass was found to be significantly improved. NaOH pretreated biomass showed remarkable increase in sorption capacity. Maximum adsorption of both metal ions was observed at pH 5. When Freundlich and Langmuir isotherms were tested, the latter had a better fit with the experimental data. The overall adsorption process was best described by pseudo second order kinetics. The thermodynamic assessment of the metal ion-Rosa centifolia biomass system indicated the feasibility and spontaneous nature of the process and DeltaG degrees was evaluated as ranging from -26.9501 to -31.652 KJmol(-1) and -24.1905 to -29.8923KJmol(-1) for lead(II) and zinc(II) sorption, respectively, in the concentration range 10-640mgL(-1). Distribution coefficient (D) showed that the concentration of metal ions at the sorbent-water interface is higher than the concentration in the continuous aqueous phase. Maximum adsorption capacity of biomass tends to be in the order Pb(II) (87.74mgg(-1))>Zn(II) (73.8mgg(-1)) by NaOH pretreated biomass.
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Yu J, Tong M, Sun X, Li B. Cystine-modified biomass for Cd(II) and Pb(II) biosorption. JOURNAL OF HAZARDOUS MATERIALS 2007; 143:277-84. [PMID: 17064847 DOI: 10.1016/j.jhazmat.2006.09.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Revised: 09/04/2006] [Accepted: 09/07/2006] [Indexed: 05/12/2023]
Abstract
The surface of dried biomass of baker's yeast was modified by crosslinking cystine with glutaraldehyde. X-ray photoelectron spectroscopy and microscope were used to characterize the modified biomass. The adsorption capacity of the modified biomass for Cd(2+) and Pb(2+) showed an increase compared with the pristine biomass due to the presence of cystine on the biomass surface. Experimental data showed that the adsorption of the two metal ions increased with time until equilibrium was achieved. The adsorption capacities for Cd(2+) and Pb(2+) were 11.63 and 45.87 mg g(-1), respectively, which were determined from the Langmuir isotherm. The loaded biosorbent was regenerated using HCl solution and could be used repeatedly at six times with little loss of uptake capacity. FTIR spectroscopy revealed that carboxyl, amide, and hydroxyl groups on the biomass surface were involved in the adsorption of Cd(2+) and Pb(2+).
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Affiliation(s)
- Junxia Yu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P.R. China
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Equilibrium study of the binary mixture of cadmium–zinc ions biosorption by the Sargassum filipendula species using adsorption isotherms models and neural network. Biochem Eng J 2007. [DOI: 10.1016/j.bej.2006.11.023] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Senthilkumar R, Vijayaraghavan K, Thilakavathi M, Iyer P, Velan M. Application of seaweeds for the removal of lead from aqueous solution. Biochem Eng J 2007. [DOI: 10.1016/j.bej.2006.10.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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Yu J, Tong M, Sun X, Li B. A simple method to prepare poly(amic acid)-modified biomass for enhancement of lead and cadmium adsorption. Biochem Eng J 2007. [DOI: 10.1016/j.bej.2006.10.012] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Murphy V, Hughes H, McLoughlin P. Cu(II) binding by dried biomass of red, green and brown macroalgae. WATER RESEARCH 2007; 41:731-40. [PMID: 17234234 DOI: 10.1016/j.watres.2006.11.032] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2006] [Revised: 11/20/2006] [Accepted: 11/22/2006] [Indexed: 05/13/2023]
Abstract
Dried biomass of the marine macroalgae Fucus spiralis and Fucus vesiculosus (brown), Ulva spp. (comprising Ulva linza, Ulva compressa and Ulva intestinalis) and Ulva lactuca (green), Palmaria palmata and Polysiphonia lanosa (red) were studied in terms of their Cu(II) biosorption performance. This is the first study of its kind to compare Cu(II) uptake by these seaweeds in the South-East of Ireland. Potentiometric and conductimetric titrations revealed a variety of functionalities on the seaweed surface including carboxyl and amino groups, which are capable of metal binding. It was also found that, of the seaweeds investigated, F. vesiculosus contained the greatest number of acidic surface binding sites while Palmaria palmata contained the least. The metal uptake capacities of the seaweeds increased with increasing pH and kinetic behaviour followed a similar pattern for all seaweeds: a rapid initial sorption period followed by a longer equilibrium period. P. palmata reached equilibrium within 10min of exposure while F. vesiculosus required 60min. Correlation was found between the total number of acidic binding sites and the time taken to reach equilibrium. Fourier transform infra-red (FTIR) analysis of the seaweeds revealed the interaction of carboxyl, amino, sulphonate and hydroxyl groups on the seaweed surface with Cu(2+) ions while time course studies established the relative contribution of each of these groups in metal binding.
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Affiliation(s)
- Vanessa Murphy
- Estuarine Research Group, Department of Chemical and Life Sciences, Waterford Institute of Technology, Cork Road, Waterford, Republic of Ireland.
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Lodeiro P, Herrero R, Sastre de Vicente ME. Batch desorption studies and multiple sorption-regeneration cycles in a fixed-bed column for Cd(II) elimination by protonated Sargassum muticum. JOURNAL OF HAZARDOUS MATERIALS 2006; 137:1649-55. [PMID: 16759799 DOI: 10.1016/j.jhazmat.2006.05.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2006] [Revised: 04/28/2006] [Accepted: 05/02/2006] [Indexed: 05/10/2023]
Abstract
The protonated alga Sargassum muticum was employed in batch desorption studies to find the most appropriate eluting agent for Cd(II)-laden biomass regeneration. Eleven types of eluting solutions at different concentrations were tested, finding elution efficiencies higher than 90% for most of the desorbents studied. Total organic carbon and biomass weight loss measurements were made. The reusability of the protonated alga was also studied using a fixed-bed column. Eleven consecutive sorption-regeneration cycles at a flow rate of 10 mL min(-1) were carried out for the removal of 50 mg L(-1) Cd(II) solution. A 0.1M HNO(3) solution was employed as desorbing agent. The column was operated during 605 h for sorption and 66 h for desorption, equivalent to a continuous use during 28 days, with no apparent loss of sorption performance. In these cycles, no diminution of the breakthrough time was found; although, a relative loss of sorption capacity, regarding the found in the first cycle, was observed. The slope of the breakthrough curves experiments a gradual increase reaching its maximum value for the last cycle tested (40% greater than for the first one). The maximum Cd(II) concentration elution peak was achieved in 5 min or less, and the metal effluent concentration was always lower than 0.9 mg L(-1) after 1 h of elution. The maximum concentration factor was determined to be between 55 and 109.
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Affiliation(s)
- P Lodeiro
- Departamento de Química Física e Enxeñería Química I, Universidade da Coruña, Alejandro de la Sota 1, 15008 A Coruña, Spain
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Lodeiro P, Herrero R, de Vicente MES. The use of protonated Sargassum muticum as biosorbent for cadmium removal in a fixed-bed column. JOURNAL OF HAZARDOUS MATERIALS 2006; 137:244-53. [PMID: 16519998 DOI: 10.1016/j.jhazmat.2006.01.061] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2005] [Revised: 01/26/2006] [Accepted: 01/27/2006] [Indexed: 05/07/2023]
Abstract
The protonated Sargassum muticum seaweed was studied as a possible biosorbent for cadmium removal in a fixed-bed column. The experiments were conducted in order to determine the effect of flow rate (0.42, 5, 10 and 20 mL min(-1)) and bed height (0.6 and 15.3 cm for the lowest flow rate or 7.4, 13 and 16.6 cm for the others) on breakthrough curves behaviour. The determined breakthrough and exhaustion times increased with the diminution in flow rate and with the increase in bed height. The maximum cadmium uptake capacity, obtained from the area below adsorbed cadmium concentration versus time curves, was found to remain practically constant with bed depth and flow rate. The bed depth service time (BDST) model was applied to analyse experimental data, determining the characteristic process parameters. The optimal lowest sorbent usage rate was evaluated at 2 min contact time and the minimum bed height values necessary to prevent the effluent solution concentration from exceeding 0.02 mg L(-1) at zero time were 5.3, 6.9 and 7.5 cm for flow rates of 5, 10 and 20 mL min(-1), respectively. Several empirical models proposed in the literature (Bohart-Adams, Yan, Belter and Chu models) were investigated in order to obtain the best fit of column data, describing in a simple manner the breakthrough curves. A correlation between model parameters and the variables implied in the process was attempted.
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Affiliation(s)
- P Lodeiro
- Departamento de Química Física e Enxeñería Química I, Universidade da Coruña, Alejandro de la Sota 1, 15008 A Coruña, Spain
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