Removal of Pb (II) Ions from Aqueous Solutions by Cladophora rivularis (L.) Hoek (Chlorophyta)

Jafari, Naser; Ahmady‐Asbchin, Salman

doi:10.1615/interjalgae.v14.i2.40

Cited by 4 publications

(3 citation 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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“…Sebagaimana diketahui bahwa logam berat jika berada di badan air akan memberikan dampak negatif yang sangat berbahaya pada kehidupan manusia, hewan maupun organisme lain yang hidup di dalamnya. Oleh karena itu, dirasa sangat perlu untuk mencari dan menyeleksi jenisjenis limbah padat dari pengolahan hasil pertanian yang sangat berpotensi untuk di jadikan sebagai bahan penyerap untuk air limbah industri yang mengandung logam-logam berat [2].…”

Section: Pendahuluanunclassified

“…Berbagai limbah pertanian telah dilaporkan ternyata dapat menyerap ion-ion logam berat antara lain adalah biji jeruk manis [1], tempurung kelapa [4], alga [2], sabut kelapa [3], daun Akasia [5], kulit pisang dan kulit jeruk [7], kulit delima [8] dan kulit manggis [9]. Batang pisang kepok merupakan limbah pertanian yang sangat jarang sekali dimanfaatkan.…”

Section: Pendahuluanunclassified

BIOSORPSI ION LOGAM BERAT Pb(II) MENGGUNAKAN BIOSORBEN BATANG PISANG KEPOK (Musa Acuminata Balbisiana Colla)

Elfia¹

2019

klinikal_sains

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Proses adsorpsi dengan menggunakan bahan-bahan biologis disebut sebagai biosorpsi dan adsorbennya dikenal sebagai biosorben. Biosorben yang digunakan dalam penelitian ini yakni limbah batang pisang kepok (Musa Acuminata Balbisiana Colla). Tujuan penelitian ini adalah untuk menghitung kapasistas penyerapan batang pisang kepok (Musa Acuminata Balbisiana Colla) terhadap ion logam Pb(II). Maka dari itu dilakukan penghitungan beberapa variable yakni konsentrasi ion logam Pb (II) dan ukuran partikel dari serbuk batang pisang kepok (Musa acuminata balbisiana Colla). Hasil penelitian didapatkan kondisi optimum penyerapan terhadap logam Pb (II). konsentrasi larutan ion logam Pb(II) 100 mg/L dan ukuran partikel 100 µm. Pada kondisi optimum tersebut diperoleh kapasitas penyerapan batang pisang kepok (Musa acuminata balbisiana Colla) terhadap ion logam Pb (II) adalah 1,99 mg/g. Berdasarkan hasil tersebut dapat disimpulkan bahwa batang pisang kepok (Musa acuminata balbisiana Colla) dapat digunakan sebagai bahan penyerap ion logam Pb (II).

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Phycocolloids from macroalgae

Häder

2021

Natural Bioactive Compounds

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Removal of Pb (II) Ions from Aqueous Solutions by Cladophora rivularis (L.) Hoek (Chlorophyta)

Cited by 4 publications

References 0 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

BIOSORPSI ION LOGAM BERAT Pb(II) MENGGUNAKAN BIOSORBEN BATANG PISANG KEPOK (Musa Acuminata Balbisiana Colla)

Phycocolloids from macroalgae

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