Kinetics and equilibrium properties of the biosorption of Cu(2+) by algae.

Summary of "Kinetics and equilibrium properties of the biosorption of Cu(2+) by algae."

The purpose of this study was to examine the kinetics and equilibrium properties of freshwater algae with Cu(2+). This was a model system to explore using algae as biosensors for water quality. Methods included making luminescence measurements (fluorescence) and copper ion-selective electrode (CuISE) measurements vs. time to obtain kinetic data. Results were analyzed using a pseudo-first-order model to calculate the rate constants of Cu(2+) uptake by algae: k (p(Cu-algae)) = 0.0025 ± 0.0006 s(-1) by CuISE and k (p(Cu-algae)) = 0.0034 ± 0.0011 s(-1) by luminescence. The binding constant of Cu-algae, K (Cu-algae), was 1.62 ± 0.07 × 10(7) M(-1). Fluorescence results analyzed using the Stern-Volmer relationship indicate that algae have two types of binding sites of which only one appears to affect quenching. The fluorescence-based method was found to be able to detect the reaction of algae with Cu(2+) quickly and at a detection limit of 0.1 mg L(-1).


Department of Chemistry, University of Maine, Aubert Hall, Orono, ME, 04469, USA.

Journal Details

This article was published in the following journal.

Name: Environmental science and pollution research international
ISSN: 1614-7499


DeepDyve research library

PubMed Articles [10718 Associated PubMed Articles listed on BioPortfolio]

Response surface methodology for cadmium biosorption on Pseudomonas aeruginosa.

In this research the effects of various physicochemical factors on Cd(2+) biosorption such as initial metal concentration, pH and contact exposure time were studied. This study has shown a Cd(2+) bios...

Accurate Measurements of Aerosol Hygroscopic Growth Over a Wide Range in Relative Humidity.

Using a comparative evaporation kinetics approach, we describe a new and accurate method for determining the equilibrium hygroscopic growth of aerosol droplets. The time-evolving size of an aqueous dr...

Hyperspectral imaging of snow algae and green algae from aeroterrestrial habitats.

Snow algae and green algae living in aeroterrestrial habitats are ideal objects to study adaptation to high light irradiation. Here, we used a detailed description of the spectral properties as a prox...

Time-dependent effects in algae for chemicals with different adverse outcome pathways - A novel approach.

Chemicals affect unicellular algae as a result of toxicokinetic and toxicodynamic processes. The internal concentration of chemicals in algae cells typically reaches equilibrium within minutes, while ...

Sequestering of As(III) and As(V) from wastewater using a novel Neem leaves/MnFe2O4 composite biosorbent.

An arsenic biosorbent comprising neem leaves and MnFe2O4 particles was developed and its removal potential was investigated. Physicochemical analysis of Neem leaves/MnFe2O4 composite was done for BET ...

Clinical Trials [855 Associated Clinical Trials listed on BioPortfolio]

ProAlgaZyme Novel Algae Infusion: Applications in Immunodeficiency

The purpose of this study is to determine the safety and effects in HIV patients of supplementation (4-20 fl. oz. daily) with ProAlgaZyme, a novel fermentation product of a freshwater alga...

ProAlgaZyme Novel Algae Infusion: Applications in Metabolic Syndrome

The purpose of this study is to compare the effects of supplementation with ProAlgaZyme (a novel fermentation product of a freshwater algae ecosystem) vs. placebo on Metabolic Syndrome an...

Assessment of Postural Orientation and Equilibrium In Early Amyotrophic Lateral Sclerosis (ALS)

The purpose of this pilot study is to characterize changes in postural orientation and equilibrium in early diagnosed ALS patient. The investigators plan to cross validate the use of a sta...

Beta Carotene From Natural Source for Patients With Non-Active Crohn's Disease

Many inflammatory disorders in the body are linked to oxidative tissue damage. Anti-oxidants that are present in many natural food sources may provide protection from such damage. Beta ca...

Study to Evaluate the Influence of Nevirapine to Atazanavir in Steady State Equilibrium in HIV Patients

The purpose of this study is to evaluate the influence of nevirapine in exposure to atazanavir boosted with ritonavir, in steady state equilibrium, in HIV-infected adult patients.

Medical and Biotech [MESH] Definitions

Algae of the division Rhodophyta, in which the red pigment (PHYCOERYTHRIN) predominates. However if this pigment is destroyed, the algae can appear purple, brown, green, or yellow. Two important substances found in the cell walls of red algae are AGAR and CARRAGEENAN. Red algae are thought to be closely related to the prokaryotic CYANOBACTERIA.

Algae of the division Chlorophyta, in which the green pigment of CHLOROPHYLL is not masked by other pigments. Green algae have over 7000 species and live in a variety of primarily aquatic habitats. Only about ten percent are marine species, most live in freshwater. They are more closely related to the green vascular land PLANTS than any other group of algae.

The hearing and equilibrium system of the body. It consists of three parts: the EXTERNAL EAR, the MIDDLE EAR, and the INNER EAR. Sound waves are transmitted through this organ where vibration is transduced to nerve signals that pass through the ACOUSTIC NERVE to the CENTRAL NERVOUS SYSTEM. The inner ear also contains the vestibular organ that maintains equilibrium by transducing signals to the VESTIBULAR NERVE.

Predominantly marine algae of the division Phaeophyta, having CHROMATOPHORES containing carotenoid PIGMENTS, BIOLOGICAL. ALGINATES and phlorotannins occur widely in all major orders. They are considered the most highly evolved algae because of their well-developed multicellular organization and structural complexity.

Microscopic fresh water algae in the family Chrysophyceae. They share many features with the BROWN ALGAE but are planktonic rather than benthic. Though most are photosynthetic, they are not considered truly autotrophic since they can become facultatively heterotrophic in the absence of adequate light. In this state they can feed on BACTERIA or DIATOMS.

Quick Search

DeepDyve research library

Searches Linking to this Article