Heavy metal biosorption from aqueous solutions by algae inhabiting rice paddies in Vietnam

Tran, Hang Thi; Vu, Ngo Dinh; Matsukawa, Masahito; Okajima, Maiko K.; Kaneko, Tatsuo; Ohki, K.; Yoshikawa, Shinya

doi:10.1016/j.jece.2016.04.038

Cited by 62 publications

(30 citation statements)

References 49 publications

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“…The uronic acid and sulfur contents were 23 and 8.4 mol % per total monosaccharide, respectively. The EPS constituent monosaccharides were rhamnose, glucose, galactose, xylose, mannose, fucose and arabinose with molar compositions of 38.6, 13.8, 4.8, 4.8, 2.4, 3.5 and 2.0, respectively . Spirulina platensis [(Nordst.)…”

Section: Extraction and Properties Of Cyanobacterial Polysaccharidessupporting

confidence: 61%

Development of Functional Bionanocomposites Using Cyanobacterial Polysaccharides

Okajima

Sornkamnerd

Kaneko

2018

The Chemical Record

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Cyanobacteria are regarded as very eco-friendly microreactors for the production of various biomolecules such as polysaccharides by fixing not only carbon but also nitrogen in water. Cyanobacterial polysaccharides having various functional groups such as hydroxyls, carboxyls, sulfates, etc. have the ability to interact with metals or inorganics, to create bionanocomposites. Sacran, a supergiant cyanobacterial anionic polysaccharide extracted from the extracellular matrix of Aphanothece sacrum which is mass-cultivated in freshwater, is mainly used to create functional bionanocomposites. Gel-type bionanocomposites of sacran with various metal cations are formed and showed photoresponsive functions. Metal recovery is performed from the sacran bionanocomposite gels. Sacran chains are complexed with multi-wall carbon nanotubes (MWCNT) to give viscose dispersion from which MWCNT bionanocomposites can be collected by electrophoresis. The MWCNT/sacran dispersion retains the capability of adsorbing various metal ions to form hardened hydrogel beads. Finally, natural inorganic sepiolite can be used for sacran bionanocomposites which show an efficient neodymium ion adsorption ability. Thus, cyanobacterial polysaccharides are useful for preparing eco-friendly and functional bionanocomposites with various hard materials.

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Section: Extraction and Properties Of Cyanobacterial Polysaccharidessupporting

confidence: 61%

Development of Functional Bionanocomposites Using Cyanobacterial Polysaccharides

Okajima

Sornkamnerd

Kaneko

2018

The Chemical Record

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“…Some of these new adsorbents include, banana waste 13,20 , oiltea shell 21 , algae 17,22 , and marine seaweed 18 . Algae have also been identified as potential Pb 2+ biosorbents due to their high content of binding sites, such as carboxyl, sulfonate, amine and hydroxyl groups 22,23 .…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue and Pb2+ by using acid-activated Posidonia oceanica waste

Elmorsi

El‐Wakeel

El-Dein

et al. 2019

Sci Rep

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Dead leaves of seagrass Posidonia oceanica were activated by using one mol L −1 acetic acid and used as an eco-adsorbent for the removal of methylene blue (MB) and Pb 2+ from aqueous solutions. The seagrass was characterized by chemical and physical measurements that confirmed the acid-activation of seagrass. The favourable conditions for MB and Pb 2+ adsorption onto the activated seagrass (SG a ) were determined to be a pH range of 2–12 and ≥6, an adsorbent dosage of 3.0 and 0.5 g L −1 , respectively, and a shaking time of 30 min, which are suitable for a wide range of wastewaters. The equilibrium data were analysed using the Langmuir, Freundlich and Dubinin-Raduskavich-Kaganer (DRK) adsorption isotherm models. The Freundlich and DRK models best describe the adsorption processes of MB and Pb 2+ , on SG a with capacities of 2681.9 and 631.13 mg g −1 , respectively. The adsorption isotherm fitting and thermodynamic studies suggest that the adsorption mechanism of MB may combine electrostatic and physical multilayer adsorption processes, in which MB may be present as monomers as well as dimers and trimers which were confirmed from UV spectroscopy whereas Pb 2+ is chemically adsorbed onto SG a . The pseudo-2 nd -order kinetic model was utilized to investigate the kinetics of adsorption processes. The removal process was successfully applied for MB-spiked brackish waste water from Manzala Lake, Egypt, with removal efficiencies of 91.5–99.9%.

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“…The absorption band at 2931.6 cm −1 is due to the symmetric stretching of aliphatic chains of the typical C-H bond in alkyl functional groups of carbohydrate and its bending vibrations at 1388.7 cm −1 (Calero et al, 2013). Also, the absorption band at 1643.2 cm −1 can be seen due to the stretching of the bonds in the carbonyl groups (C=O) in primary and secondary amides of proteinpeptide bonds (Gupta & Rastogi, 2008), and the band at 1546.8 cm −1 confirms the presence of carboxylates (COO- (Tran et al, 2016). According to Bhunia et al (2018) the absorption bands at 1031.8 cm −1 and 1417.6 cm −1 are due to the stretching of the C-OH and C-H bond, respectively, in pyranose units.…”

Section: Characterization Of Biosorbentmentioning

confidence: 87%

Removal of methylene blue dye using Nostoc commune biomass: kinetic, equilibrium and thermodynamic study

Lavado-Meza

Asencios

Cisneros-Santos

et al. 2021

RMIQ

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Heavy metal biosorption from aqueous solutions by algae inhabiting rice paddies in Vietnam

Cited by 62 publications

References 49 publications

Development of Functional Bionanocomposites Using Cyanobacterial Polysaccharides

Development of Functional Bionanocomposites Using Cyanobacterial Polysaccharides

Adsorption of Methylene Blue and Pb2+ by using acid-activated Posidonia oceanica waste

Removal of methylene blue dye using Nostoc commune biomass: kinetic, equilibrium and thermodynamic study

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