Removal of Pb (II) Ions from Aqueous Solutions by<i>Cladophora rivularis</i>(Linnaeus) Hoek

Jafari, Naser; Senobari, Z.

doi:10.1100/2012/793606

Cited by 12 publications

(4 citation statements)

References 26 publications

(33 reference statements)

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“…If the sequencing results showed novel characteristics, then the Mo-reducing enzyme should have a new name, NAD(P)H: phosphomolybdate oxidoreductase or, simply, phosphomolybdate reductase. The greater understanding of the underlying mechanism of molybdenum reduction catalyzed by this enzyme could lead to improved processes in the area of bioremediation [33], reducing biocorrosion [34], biomining [35], and biorecycling of molybdenum [36, 37]. …”

Section: Discussionmentioning

confidence: 99%

Molybdenum Reduction to Molybdenum Blue inSerratiasp. Strain DRY5 Is Catalyzed by a Novel Molybdenum-Reducing Enzyme

Shukor

Halmi

Rahman

et al. 2014

BioMed Research International

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The first purification of the Mo-reducing enzyme from Serratia sp. strain DRY5 that is responsible for molybdenum reduction to molybdenum blue in the bacterium is reported. The monomeric enzyme has an apparent molecular weight of 105 kDalton. The isoelectric point of this enzyme was 7.55. The enzyme has an optimum pH of 6.0 and maximum activity between 25 and 35°C. The Mo-reducing enzyme was extremely sensitive to temperatures above 50°C (between 54 and 70°C). A plot of initial rates against substrate concentrations at 15 mM 12-MP registered a V max for NADH at 12.0 nmole Mo blue/min/mg protein. The apparent K m for NADH was 0.79 mM. At 5 mM NADH, the apparent V max and apparent K m values for 12-MP of 12.05 nmole/min/mg protein and 3.87 mM, respectively, were obtained. The catalytic efficiency (k cat/K m) of the Mo-reducing enzyme was 5.47 M−1 s−1. The purification of this enzyme could probably help to solve the phenomenon of molybdenum reduction to molybdenum blue first reported in 1896 and would be useful for the understanding of the underlying mechanism in molybdenum bioremediation involving bioreduction.

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Section: Discussionmentioning

confidence: 99%

Molybdenum Reduction to Molybdenum Blue inSerratiasp. Strain DRY5 Is Catalyzed by a Novel Molybdenum-Reducing Enzyme

Shukor

Halmi

Rahman

et al. 2014

BioMed Research International

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“…Cladophora cell wall polysaccharides also display ion-exchange properties binding metals such as lead, copper, and zinc, and suggesting potential use of this alga in monitoring the chemical status of aquatic environments ( _ Zbikowski et al 2007), or to remove heavy metal ions from wastewater (reviewed by Mehta and Gaur 2005, Lee and Chang 2011, Jafari and Senobari 2012, Ji et al 2012 wall-binding properties, high levels of heavy metals can be toxic to Cladophora Hawkes 1986, Lamai et al 2005).…”

Section: Reproductionmentioning

confidence: 99%

The Genus Cladophora Kützing (Ulvophyceae) as a Globally Distributed Ecological Engineer

Zulkifly

Graham

Young

et al. 2013

Journal of Phycology

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The green algal genus Cladophora forms conspicuous nearshore populations in marine and freshwaters worldwide, commonly dominating peri-phyton communities. As the result of human activities, including the nutrient pollution of nearshore waters, Cladophora-dominated periphyton can form nuisance blooms. On the other hand, Cladophora has ecological functions that are beneficial, but less well appreciated. For example, Cladophora has previously been characterized as an ecological engineer because its complex structure fosters functional and taxonomic diversity of benthic microfauna. Here, we review classic and recent literature concerning taxonomy, cell biology, morphology, reproductive biology, and ecology of the genus Cladophora, to examine how this alga functions to modify habitats and influence littoral biogeochemistry. We review the evidence that Cladophora supports large, diverse populations of microalgal and bacterial epiphytes that influence the cycling of carbon and other key elements, and that the high production of cellulose and hydrocarbons by Cladophora-dominated periphyton has the potential for diverse technological applications, including wastewater remediation coupled to renewable biofuel production. We postulate that well-known aspects of Cladophora morphology, hydrodynamically stable and perennial holdfasts, distinctively branched architecture, unusually large cell and sporangial size and robust cell wall construction, are major factors contributing to the multiple roles of this organism as an ecological engineer.

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“…Adsorbent that could affect the adsorption of metal ions. Functional groups like carboxyl and hydroxyl generally are used as a place for metal ions to interact so that absorption occurs (Jafari and Senobari, 2012). The FTIR spectra showed that the presence in Figure 2a.…”

Section: Characterization Of Adsorbentmentioning

confidence: 99%

Adsorption Of Cr(VI) Ions Using Sugar Palm Fruit Peel (Arenga Pinnata) Immobilized in Ca-Alginate Bead

Lestari

Prasetyo²,

Tarigan³

et al. 2022

J. Rekayasa Kim. Lingkung.

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physiological or metabolic processes that can cause cancer in humans. Adsorption is one of the method that is quite effective for removing Cr(VI) in waters because this method uses low cost with good efficiency. Sugar palm fruit peel waste can be used as an adsorbent because it contains active compounds such as carbohydrates, proteins, fats that can play a role in the absorption of metal ions. This sugar palm peel waste will be immobilized using a Ca-alginate medium to increase the absorption of mechanical forces in the adsorption process. The sugar palm fruit peel was activated using 4% NaOH, which was then immobilized by Ca-alginate. The adsorbent was tested to determine its functional group using FTIR and using SEM EDX to see the surface morphology and the elements present in the adsorbent. The results showed that the optimum absorption of metal ions Cr(VI) using Ca-alginate immobilized palm peel as adsorbent at optimum pH 2 with an efficiency of 63% and adsorption capacity of 0.35396 mg/g, the optimum contact time was 75 minutes with an efficiency of 73, 83% and adsorption capacity of 0.41314 mg/g and the optimum concentration at 150 ppm with adsorption capacity of 13.15185 mg/g

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Removal of Pb (II) Ions from Aqueous Solutions byCladophora rivularis(Linnaeus) Hoek

Cited by 12 publications

References 26 publications

Molybdenum Reduction to Molybdenum Blue inSerratiasp. Strain DRY5 Is Catalyzed by a Novel Molybdenum-Reducing Enzyme

Molybdenum Reduction to Molybdenum Blue inSerratiasp. Strain DRY5 Is Catalyzed by a Novel Molybdenum-Reducing Enzyme

The Genus Cladophora Kützing (Ulvophyceae) as a Globally Distributed Ecological Engineer

Adsorption Of Cr(VI) Ions Using Sugar Palm Fruit Peel (Arenga Pinnata) Immobilized in Ca-Alginate Bead

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