Biosorption of Cd, Zn and Cu by Sargassum sp. waste biomass

Valdman, E.; Leite, Selma Gomes Ferreira

doi:10.1007/pl00009109

Cited by 75 publications

(28 citation statements)

References 6 publications

(8 reference statements)

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“…However, these techniques exhibit many disadvantages, such as high expenses due to high reagent doses and energy requirements, production of large amounts of toxic sludge, and a lack of efficient selectivity. Therefore, these techniques cannot be used on a commercial scale , . Biosorption is considered a promising technique that can serve as an alternative to conventional technologies for bioremediation of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Biosorption and Binding Mechanisms of Ni²⁺ and Cd²⁺ with Aerobic Granules Cultivated in Different Synthetic Media

2017

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Aerobic granules synthesized by feeding real wastewater (R‐granules) in a sequencing batch reactor were applied to remove Ni2+ and Cd2+ from aqueous solutions and compared with granules cultivated with laboratory‐synthesized wastewater (S‐granules). Metal biosorption was related to solution pH, initial metal concentration, and reaction time. The chemically modified R‐granules showed increased removal efficiency for the examined metals, and the results were almost identical to those of S‐granules. Ion‐exchange and complexation with extracellular polymeric substances were the predominant mechanisms involved in Ni2+ and Cd2+ loading onto the granules, whereby different groups were associated with the binding. The oxygen atom in peptide bonds interacted more with heavy metals than the nitrogen atom.

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Section: Introductionmentioning

confidence: 99%

Biosorption and Binding Mechanisms of Ni²⁺ and Cd²⁺ with Aerobic Granules Cultivated in Different Synthetic Media

2017

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“…It is possible to identify a plateau at higher metal concentrations as a monolayer is formed when the solid surface reaches saturation (8). To obtain the constants of Langmuir model (q max and b), regression features in Statistica 5.0 were used.…”

Section: Resultsmentioning

confidence: 99%

“…The suspension was continuously shaken for 3 h at 28 ЊC (8). The experiment was conducted in absence of buffer to avoid the effect of buffer components on the reaction course.…”

Section: Kinetics Experimentsmentioning

confidence: 99%

Zinc Biosorption by Seaweed Illustrated by the Zincon Colorimetric Method and the Langmuir Isotherm

Areco¹,

Afonso²,

Valdman

2007

J. Chem. Educ.

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Enhanced industrial activity during recent decades has led to the discharge of unprecedented volumes of wastewater, which is a serious cause of environmental degradation. Heavy metals are major pollutants in marine, ground, industrial, and even treated waters. Owing to their high toxicity, heavy metals pose a serious threat to biota and the environment (1). Therefore, it is necessary to reduce these metals from industrial effluents, before their discharge into water bodies. Several methods have been suggested for the removal of toxic metals from wastewaters (2). Increasingly stringent regulations are forcing scientists to study new technologies for metal removal from wastewater to determine the best means of attaining today's toxicity-driven limits (3).Sorption of heavy metals onto live or dead biological materials (biosorption) is a potential method for removing or recovering toxic and precious metals from wastewater (3, 4). Successful metal biosorption has been reported by a variety of biological materials including microalgae and seaweeds, bacteria, fungi, and crop residues (5, 6). Since the cost of producing biomass specifically for metal removal through cultivation is generally high, we considered the use of marine algae collected directly from the Atlantic coast to study this process.Ulva sp., known as sea lettuce, and Gymnogongrus torulosus, a red algae, are common seaweeds found in the Atlantic coast and easily collected at the high-tide line along the beach. Their physical appearance is quite distinctive and with the aid of an adequate photo ( Figure 1) it is possible for students to collect and identify these particular algae.Zinc is a natural element that is essential for man and most living organisms. The average abundance of zinc in the earth's crust is 76 ppm; in soils it is 25 to 68 ppm; in streams it is 20 µg͞L; and in groundwaters it is lower than 0.1 mg͞L. The solubility of zinc is controlled in natural waters by adsorption on mineral surfaces, precipitation with carbonate ions, and complexation with organic moieties. To be ecotoxic, the metal has to be present in a chemical form that can be taken up by, for example, living organisms, and hence be harmful. The term bioavailability refers to at what rate and to what extent a substance might be taken up by an organism, whereas ecotoxicity refers to a way to assess changes taking place in environmental systems owing to released substances.The heavy metals cause problems by displacing or replacing minerals that are required for essential body functions. Indeed, zinc deficiency is now recognized as a human health problem. Too little zinc can cause health problems such as loss of appetite, decreased sense of taste and smell, slow wound healing and skin sores, or a damaged immune system. On the other hand, too much zinc can also damage human health (7). Also, elevated concentrations of zinc in stream water and sediments have reduced species diversity and abundance of aquatic communities.The atomic absorption spectrometric (AAS) or inductively coupled p...

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“…1998; Taniguchi et al . 2000; Valdman and Leite 2000). However, most biosorbents currently used are in the form of suspended flocs.…”

Section: Introductionmentioning

confidence: 99%

“…Research effort has turned to the development of efficient and low-cost metal absorbents. In this context, a vast array of biomaterials have been tested as biosorbents for heavy metal removal, such as marine algae, fungi, hairy roots of Thlaspi caerulescens, waste activated sludge and digested sludge (Lodi et al 1998;Taniguchi et al 2000;Valdman and Leite 2000). However, most biosorbents currently used are in the form of suspended flocs.…”

Section: Introductionmentioning

confidence: 99%

Aerobic granules: a novel zinc biosorbent

Liu

Yang

Tan

et al. 2002

Lett Appl Microbiol

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Aims: Aerobic granules are aggregates with a compact and porous microbial structure. In view of the potential use of aerobic granules as biosorbents for Zn(II) removal from industrial wastewater, this study investigated the effects of initial Zn(II) and aerobic granule concentrations on the kinetics of Zn(II) biosorption on the aerobic granule surface. Methods and Results: Acetate-fed aerobic granules with a mean diameter of 1AE0 mm were used as biosorbents. Results showed that the kinetics of Zn(II) biosorption on the aerobic granule surface were related to both initial Zn(II) and granule concentrations. It was found that the real driving force for Zn(II) biosorption on the aerobic granule surface could be described by the ratio of initial Zn(II) concentration (C o ) to initial granule concentration (X o ), rather than individual C o or X o . The C o ⁄ X o ratio provides a unified basis for interpretation of the biosorption data obtained under different initial conditions. The maximum biosorption capacity of Zn(II) by aerobic granules was 270 mg g )1 .Conclusions: It appears that the aerobic granule can be used as an effective biosorbent for efficient removal of Zn(II) or other types of heavy metals from industrial wastewater. Significance and Impact of the Study: This study could lead to the development of a novel granular biosorbent for the removal of heavy metals from wastewater. A simple and compact aerobic granule-based biosorber could be expected.

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Biosorption of Cd, Zn and Cu by Sargassum sp. waste biomass

Abstract: Biosorption is becoming an important component in the integrated approach to the treatment of aqueous ef¯uents. The economics of biomass technical applications are improved by using waste biomass instead of purposelyproduced biomass. Biomass derived from an alginate ex-

Cited by 75 publications

References 6 publications

Biosorption and Binding Mechanisms of Ni²⁺ and Cd²⁺ with Aerobic Granules Cultivated in Different Synthetic Media

Biosorption and Binding Mechanisms of Ni²⁺ and Cd²⁺ with Aerobic Granules Cultivated in Different Synthetic Media

Zinc Biosorption by Seaweed Illustrated by the Zincon Colorimetric Method and the Langmuir Isotherm

Aerobic granules: a novel zinc biosorbent

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Biosorption of Cd, Zn and Cu by Sargassum sp. waste biomass

Abstract: Biosorption is becoming an important component in the integrated approach to the treatment of aqueous ef¯uents. The economics of biomass technical applications are improved by using waste biomass instead of purposelyproduced biomass. Biomass derived from an alginate ex-

Cited by 75 publications

References 6 publications

Biosorption and Binding Mechanisms of Ni2+ and Cd2+ with Aerobic Granules Cultivated in Different Synthetic Media

Biosorption and Binding Mechanisms of Ni2+ and Cd2+ with Aerobic Granules Cultivated in Different Synthetic Media

Zinc Biosorption by Seaweed Illustrated by the Zincon Colorimetric Method and the Langmuir Isotherm

Aerobic granules: a novel zinc biosorbent

Contact Info

Product

Resources

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Biosorption and Binding Mechanisms of Ni²⁺ and Cd²⁺ with Aerobic Granules Cultivated in Different Synthetic Media

Biosorption and Binding Mechanisms of Ni²⁺ and Cd²⁺ with Aerobic Granules Cultivated in Different Synthetic Media