Nickel Ion Requirements for Autotrophic Growth of Several Marine Microalgae with Urea Serving as Nitrogen Source

1986 ◽  
Vol 43 (12) ◽  
pp. 2427-2433 ◽  
Author(s):  
Luis Oliveira ◽  
Naval J. Antia
Keyword(s):  
Nitrogen Source ◽  
Metal Ion ◽  
Reliable Method ◽  
Algal Growth ◽  
Marine Species ◽  
Subsequent Growth ◽  
Nickel Ion ◽  
Widespread Occurrence ◽  
Effective Utilization ◽  
Nickel Requirement

Twelve marine species were tested for their competence to grow on urea as sole nitrogen source, and the influence of nickel ion on such urea utilization was determined. In those cases (six species) where good algal growth occurred in the seawater medium used without added nickel, the metal ion requirement was demonstrated by suppressing the algal growth with a chelator (citric acid) and testing for subsequent growth from addition of excess nickel. The results showed that a nickel requirement for urea utilization is of widespread occurrence among the microalgae tested. The concentrations of nickel tested in the laboratory were compared with the endogenous nickel levels reported for ocean waters, and it was concluded that these levels are generally sufficient to support an effective utilization of urea by most urease-producing algae. The value of chelation tests as a rapid, reliable method for the demonstration of the Ni2+ requirement is discussed.

Prediction of Soluble Nickel Removal by Activated Sludge Using Free Metal Ion Concentrations

1987 ◽  
Vol 19 (3-4) ◽  
pp. 439-448 ◽  
Author(s):  
Jeppe S. Nielsen ◽  
Steve E. Hrudey ◽  
Frederick F. Cantwell
Keyword(s):  
Activated Sludge ◽  
Metal Ion ◽  
Municipal Sewage ◽  
Nickel Ion ◽  
Ion Concentrations ◽  
Untreated Sewage ◽  
Nickel Uptake ◽  
Nickel Removal ◽  
Free Metal ◽  
Free Metal Ion

Batch isotherm studies using spiked sewage samples containing a range of total soluble nickel concentrations typical of municipal sewage strongly suggested that it is the free (i.e. uncomplexed) nickel ion that is sorbed by activated sludge. Equations relating nickel uptake by activated sludge to free nickel ion concentrations and the extent of complexation in untreated sewage were developed and applied. Predicted and measured nickel removals generally agreed to within ± 30%.

scholarly journals The eutT Gene of Salmonella enterica Encodes an Oxygen-Labile, Metal-Containing ATP:Corrinoid Adenosyltransferase Enzyme

2004 ◽  
Vol 186 (17) ◽  
pp. 5708-5714 ◽  
Author(s):  
Nicole R. Buan ◽  
Sang-Jin Suh ◽  
Jorge C. Escalante-Semerena
Keyword(s):  
Nitrogen Source ◽  
Salmonella Enterica ◽  
Metal Ion ◽  
Complete Loss ◽  
Cell Extracts ◽  
Mutant Strains ◽  
Catalytic Role ◽  
Necessary And Sufficient

ABSTRACT The eutT gene of Salmonella enterica was cloned and overexpressed, and the function of its product was established in vivo and in vitro. The EutT protein has an oxygen-labile, metal-containing ATP:co(I)rrinoid adenosyltransferase activity associated with it. Functional redundancy between EutT and the housekeeping ATP:co(I)rrinoid adenosyltransferase CobA enzyme was demonstrated through phenotypic analyses of mutant strains. Lack of CobA and EutT blocked ethanolamine utilization. EutT was necessary and sufficient for growth of an S. enterica cobA eutT strain on ethanolamine as a carbon and energy or nitrogen source. A eutT+ gene provided in trans corrected the adenosylcobalamin-dependent transcription of a eut-lacZ operon fusion in a cobA strain. Cell extracts enriched for EutT protein contained strong, readily detectable ATP:co(I)rrinoid adenosyltransferase activity. The activity was only detected in extracts maintained under anoxic conditions, with complete loss of activity upon exposure to air or treatment with the Fe2+ ion chelator bathophenanthroline. While the involvement of another metal ion cannot be ruled out, the observed sensitivity to air and bathophenanthroline suggests involvement of Fe2+. We propose that the EutT protein is a unique metal-containing ATP:co(I)rrinoid adenosyltransferase. It is unclear whether the metal ion plays a structural or catalytic role.

Continuous biosorption of nickel from aqueous solution using Chrysanthemum indicum derived biochar in a fixed-bed column

2017 ◽  
Vol 76 (7) ◽  
pp. 1895-1906 ◽  
Author(s):  
Sowmya Vilvanathan ◽  
S. Shanthakumar
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Ion Concentration ◽  
Column Studies ◽  
Nickel Ion ◽  
Fixed Bed Column ◽  
Nickel Ions ◽  
Chrysanthemum Indicum

The biosorption capability of Chrysanthemum indicum to remove nickel ions from aqueous solution in a fixed-bed column was examined in this study. Native C. indicum flower waste was improved for its biosorptive potential by pyrolysis to obtain its biochar form and, thereby, both raw (CIF-R) and biochar (CIF-BC) forms of the flower were used for Ni(II) removal. Fixed bed column studies were conducted to examine the influence of bed height (1.0–3.0 cm), flow rate (1.0–5.0 mL min−1) and initial metal ion concentration (25–75 mg L−1). The breakthrough curves (Cout/Cin vs time) were modelled using different dynamic adsorption models, viz. Adams-Bohart, Thomas and Yoon-Nelson model. Interpretation of the data revealed a favorable correlation with the Thomas model with higher R2 values and closer model-predicted and experimental biosorption capacity values. The equilibrium uptake capacity of CIF-R and CIF-BC for Ni(II) were found to be 14.02 and 29.44 mg g−1, respectively. Further, the column was regenerated using HCl as eluent, to desorb the adsorbed Ni(II) ions. The experimental results implied and affirmed the suitability of the biosorbents for nickel ion biosorption with its nature being favorable, efficient, and environmentally friendly.

scholarly journals Adsorption of Nickel Ion by Low Cost Carbon-Kinetic, Thermodynamic and Equilibrium Studies

2009 ◽  
Vol 6 (s1) ◽  
pp. S347-S357 ◽  
Author(s):  
V. Vijayakumaran ◽  
S. Arivoli ◽  
S. Ramuthai
Keyword(s):  
Langmuir Isotherm ◽  
Metal Ion ◽  
Low Cost ◽  
Mineral Acid ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Equilibrium Studies ◽  
Nickel Ion ◽  
Nickel Ions ◽  
Initial Ph

A carbonaceous adsorbent prepared from an indigenous waste, by acid treatment was tested for its efficiency in removing nickel ion. The process parameters studied include agitation time, initial metal ion concentration, carbon dose, pH and temperature. The adsorption followed first order reaction equation and the rate is mainly controlled by intraparticle diffusion. Freundlich and Langmuir isotherm models were applied to the equilibrium data. The adsorption capacity (Qm) obtained from the Langmuir isotherm plot were found to around 43 mg/g at an initial pH of 7.0. The temperature variation study showed that the nickel ions adsorption is endothermic and spontaneous with increased randomness at the solid solution interface. Significant effect on adsorption was observed on varying the pH of the nickel ion solutions. The Langmuir and Freundlich adsorption isotherms obtained, positive ΔH0value, pH dependent results and desorption of metal ions in mineral acid suggest that the adsorption of nickel ion on MCC involves chemisorption as well as physisorption mechanism.

scholarly journals ALGAL GROWTH AND NUTRIENTS REMOVAL AS AFFECTED BY NITROGEN SOURCE

2017 ◽  
Vol 39 (3) ◽  
pp. 51-73 ◽  
Author(s):  
El-Kassas, H. I. ◽  
El-Sayed, A .B. ◽  
Mostafa, Maryam, M. ◽  
Reda, Marwa, M.
Keyword(s):  
Nitrogen Source ◽  
Algal Growth ◽  
Nutrients Removal

scholarly journals Metal-Salen-based Probes for the Selective Detection of Phosphates via a Disassembly Approach

2020 ◽  
Vol 74 (4) ◽  
pp. 252-256
Author(s):  
Prerna Yadav ◽  
Felix Zelder
Keyword(s):  
Metal Ion ◽  
Free Ligand ◽  
Fluorescent Sensors ◽  
Selective Detection ◽  
Widespread Occurrence ◽  
Chemical Systems ◽  
Salen Complexes ◽  
Mode Of Detection ◽  
Endogenous Role ◽  
Target Analyte

Polyoxophosphates are ubiquitous in nature and play important roles in biological systems and in the environment. Pyrophosphate (PPi), an important member of this family, is produced in over 200 biochemical reactions and is a marker in clinical diagnosis. In addition to its endogenous role, PPi alias E450 is currently used as preservative, emulsifier or taste intensifier in foodstuff. Despite this widespread occurrence and biological importance, it is rather surprising that robust chemical systems that detect selectively and sensitively PPi in challenging matrices are still lacking. This mini review focuses on metal-salen complexes as reaction-based fluorescent sensors for the selective detection of PPi and other phosphates. The mode of detection is based on a novel disassembly approach in which the metal ion is sequestered by the target analyte from the complex and the metal-free ligand hydrolyses spontaneously into its fluorescent subunits. Optimizations of the probe and applications for PPi detection in cells and foodstuff are described.

Plasma-Activated Water as Nitrogen Source for Algal Growth: A Microcosm Study

2021 ◽  
pp. 1-6
Author(s):  
Seema Sukhani ◽  
N. Punith ◽  
Atharva Ekatpure ◽  
Gautami Salunke ◽  
M. Manjari ◽  
...  
Keyword(s):  
Nitrogen Source ◽  
Algal Growth ◽  
Microcosm Study ◽  
Plasma Activated Water

Complexes of Di-2-pyridyl ketone. II. Some chelated nickel(II) products of metal-promoted reactions at the ketones

1970 ◽  
Vol 23 (10) ◽  
pp. 1997 ◽  
Author(s):  
MC Feller ◽  
R Robson
Keyword(s):  
Aqueous Solution ◽  
Spectral Data ◽  
Metal Ion ◽  
Room Temperature ◽  
Cyanide Ion ◽  
Nickel Ion ◽  
Square Planar ◽  
Ligand Fields ◽  
Solid Complexes

From reactions in aqueous solution between nickel(11) nitrate, di-2-pyridyl ketone (DPK), and the reagents MeNH2, NH3, pyrazole ( C3H4N2) , HS03-,PhNHNH2, and 82-, solid complexes with the following stoicheiometries were isolated: Ni(DPK)z(MeNH2)2(N03)z(H2O)x (x: = 1, 0), Ni(DPK)z(NH~)(H2O)(NO3)3, K~(DPK)z(C3H4NZ)2(NO3)Z(H2O)y(y = 3, O), Ni(DPK)Z(HSO4)Z(HZO), Ni(DPK)2- (PhNHNH2)2(N03)2, and Ni(DPK)2(H2O)2S. Magnetic and spectral data indicate pseudo-octahedral ligand fields in all cases. Except in the cases Ni(DPK)2(H20)2S and Ni(DPK)2(PhNHNH2)2(NO3)2, for which the evidence is ambiguous, elementary compositions and i.r. spectra indicate that the added nucleophile, HX, has condensed with at least one of the two DPK units per nickel ion, yielding tridentate products, (C5H4N)2(OH)X. I n the complexes of stoicheiometry Ni(DPK)2(C3H4N2)2(N03)2 and N~(DPK)z(M~NH~)z(NO~)Z both DPK units per nickel ion have condensed with the nucleophile yielding products bound to the cation as tridentate N3 ligands. U.V. spectral observations in aqueous solution indicate that with the reagents MeNH2, NH3, C ~ H ~ N Z , and HS03- attack upon DPK occurs slowly, if a t all, in the absence of nickel(11) a t room temperature, but in the presence of nickel(11) much more rapid condensation occurs. These reactions constitute new types of metal-ion promoted condensation. With cyanide ion as the nucleophile, attack occurs not a t the ketone but a t nickel yielding [Si(DPK)2]2+[Ni(CN)4]z- in w-hich the cation is octahedral, the anion square-planar, and some cyanide units are bridging.

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