scholarly journals Adsorpsi Pb (II) Oleh Arang Aktif dari Tumbuhan Mangrove Avicennia marina

2020 ◽  
Vol 2 (2) ◽  
pp. 76
Author(s):  
Rina Andayani ◽  
Yuli Ainun Najih
Keyword(s):  
Avicennia Marina

<p>Logam berat adalah zat yang berbahaya bagi kesehatan manusia. Logam berat biasa ditemui dalam bentuk ion terlarut. Salah satu jenis dari logam berat tersebut adalah timbal (Pb (II)). Salah satu cara untuk mengurangi kandungan Pb (II) adalah dengan proses adsorpsi dengan menggunakan arang aktif. Beberapa bahan dari alam telah diteliti sebagai bahan arang aktif untuk adsorpsi logam berat Pb (II), antara lain cangkang kelapa sawit, kulit singkong, sabut siwalan, dan bambu. Tumbuhan magrove <em>Avicennia marina</em> merupakan spesies yang cukup banyak tersedia di Surabaya. Penelitian ini bertujuan untuk menganalisa proses adsorpsi arang aktif dari tumbuhan mangrove <em>Avicennia marina</em> terhadap logam berat Pb (II). Metode yang digunakan meliputi tiga tahap yaitu (1) pengarangan/karbonisasi; (2) aktivasi arang; (3) adsorpsi Pb (II). Dari penelitian yang telah dilakukan dapat disimpulkan bahwa proses aktivasi arang menjadi arang aktif dengan menggunakan activator ZnCl<sub>2</sub> dapat membuka pori-pori yang terdapat pada permukaan arang, sehingga arang aktif dapat mengadsorpsi Pb. Semakin besar konsentrasi awal akan mengakibatkan menurunnya % adsorpsi dengan jumlah adsorben yang sama. Proses adsorpsi isotermal Pb (II) oleh arang aktif dari tumbuhan mangrove <em>Avicennia marina</em>, lebih mengikuti model adsorpsi isotermal Langmuir dimana memiliki nilai R<sup>2</sup> = 0,9968, sedangkan untuk model adsorpsi isoterm Freudlinch memiliki nilai R<sup>2</sup> = 0,9474.</p><p> </p><p><strong>Kata Kunci:</strong> adsorpsi, Pb, arang aktif, Avicennia marina</p>

Naphthofuranone phytoalexins from the grey mangrove, Avicennia marina

1985 ◽  
Vol 23 (12) ◽  
pp. 2877-2879 ◽  
Author(s):  
D Sutton
Keyword(s):  
Avicennia Marina ◽  
Grey Mangrove

A Study on the Composition and Antioxidant Properties of Avicennia marina Leaf Extract

2017 ◽  
Vol 13 (2) ◽  
pp. 131-136
Author(s):  
Mohammad Molaee ◽  
Mohammad Ali Sahari ◽  
Reza Esmaeilzadeh Kenari ◽  
Shiva Amirkaveei ◽  
Elahe Arbidar
Keyword(s):  
Leaf Extract ◽  
Antioxidant Properties ◽  
Avicennia Marina

Phytochemical Screening, Antimicrobial and Antioxidant Activities of Selected Mangrove Species

2020 ◽  
Vol 16 (2) ◽  
pp. 152-163 ◽  
Author(s):  
Nilesh L. Dahibhate ◽  
Utpal Roy ◽  
Kundan Kumar
Keyword(s):  
Staphylococcus Epidermidis ◽  
Methanol Extract ◽  
Ethyl Acetate Extract ◽  
Antioxidant Activities ◽  
Avicennia Marina ◽  
Total Flavonoids ◽  
Phytochemical Screening ◽  
Mangrove Species ◽  
Sonneratia Caseolaris ◽  
Bruguiera Gymnorhiza

Background: Mangrove plant extracts are used in folkloric medicine as aphrodisiac, sedative, antioxidant, antimicrobial and antimalarial. Screening for antimicrobial, phytochemical and antioxidant activities of fourteen mangroves plant species (Aegiceras corniculatum, Acanthus ilicifolius, Avicennia alba, Avicennia marina, Avicennia officinalis, Bruguiera cylindrica, Bruguiera gymnorhiza, Ceriops tagel, Excoecaria agallocha, Kandelia candel, Rhizophora apiculata, Rhizophora mucronata, Sonneratia alba, and Sonneratia caseolaris) in various solvents are reported in this work. Methods: The antimicrobial screening was carried out using agar well diffusion method. In this study, nine pathogenic strains were used, including three Gram-positive and six Gram-negative bacteria. Phytochemical screening, total flavonoids, total phenolic and antioxidant activity was tested by DPPH radical scavenging assay. Four phenolic compounds (gallic acid, vanillin, tannic acid and quercetin) were quantified by LC-MS/MS in selected mangrove species. Results: Antimicrobial screening showed Staphylococcus aureus, Staphylococcus epidermidis, Enterococcus faecalis and Pseudomonas aeruginosa were most susceptible to ethyl acetate extract as compared to ethanol and methanol extract. Ethyl acetate extract of Avicennia marina and Bruguiera gymnorhiza showed strong antibacterial activity against Staphylococcus aureus, Staphylococcus epidermidis, Enterococcus faecalis and Pseudomonas aeruginosa. Phytochemical analysis revealed the presence of saponins, phenolics, flavonoids, alkaloids, tannins, and terpenoids, which was found to be variable as per the solvent used for extraction. In addition, total phenolics and total flavonoids content with different solvents were found in the range of 11.08 to 196.76 mg GAE/g and 12.92 to 110.3 mg QE/g of extract respectively. Moreover, antioxidant capacities expressed in terms of IC50 (mg/mL) showed that methanol extract exhibited higher antioxidant capacity followed by ethanol extract. LC-MS/MS analysis showed gallic acid and tannic acid are present in higher concentration in Aegiceras corniculatum and Sonneratia caseolaris than other species. The vanillin and quercetin were found in the least concentration. Conclusion: Mangroves species are rich source of antioxidant, phenolics and antimicrobial compounds.

scholarly journals Spatial distribution and potential ecological risk assessment of some trace elements in sediments and grey mangrove (Avicennia marina) along the Arabian Gulf coast, Saudi Arabia

2020 ◽  
Vol 18 (1) ◽  
pp. 77-96
Author(s):  
Hameed Alsamadany ◽  
Hassan S. Al-Zahrani ◽  
El-Metwally M. Selim ◽  
Mohsen M. El-Sherbiny
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Ecological Risk ◽  
Oil Pollution ◽  
Gulf Coast ◽  
Arabian Gulf ◽  
Avicennia Marina ◽  
Potential Ecological Risk ◽  
Average Concentration ◽  
Grey Mangrove

AbstractTo assess trace element concentrations (Zn, Cu, Pb, Cr, Cd and Ni) in the mangrove swamps along the Saudi coast of the Arabian Gulf, thirteen samples of surface sediment and leaves of grey mangrove, Avicennia marina were collected and analyzed. The detected trace element contents (μg g-1) in surface sediments were in the following descending order according to their mean values; Cr (49.18) > Zn (48.48) > Cu (43.06) > Pb (26.61) > Ni (22.88) > Cd (3.21). The results showed that the average concentrations of Cd and Pb exceeded their world average concentration of shale. The geo-accumulation, potential ecological risk and toxicity response indices demonstrated that trace elements have posed a considerable ecological risk, especially Cd. The inter-relationships between physico-chemical characters and trace elements suggests that grained particles of mud represent a noteworthy character in the distribution of trace elements compared to organic materials. Moreover, the results revealed that Zn was clearly bioaccumulated in leaf tissues A. marina. Dredging, landfilling, sewage effluents and oil pollution can be the paramount sources of pollution in the area under investigation.

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