Influence of microplastics on the toxicity of the pharmaceuticals procainamide and doxycycline on the marine microalgae Tetraselmis chuii

Penelitian ini membahas tentang penentuan batas laju alir yang diberikan kepada mikroalga Tetrashelmis chuii dan Spirrulina sp terhadap ketahananya dalam hal mengadsorpsi CO2 dengan konsentasi umpan CO2 yang cukup besar. Tujuan dari penelitian ini adalah menentukan batas toleransi laju alir gas umpan dengan konsentrasi CO2 konstan pada mikroalga (Tetraselmiss chuii dan Spirrulina sp) dalam fotobioreaktor. Hal ini diperlukan untuk mengkarakteristikan jenis mikroalga terhadap ketahanannya dalam menerima umpan gas yang diberikan untuk mengurangi jumlah CO2 dengan dilakukannya variasi laju alir umpan masuk fotobioreaktor yaitu 1 l/menit , 1,5 l/menit dan 2 l/menit dengan konsentrasi CO2 sebesar 33 %. Didapatkan hasil bahwa laju alir yang optimum yang dimiliki oleh mikroalga paling baik dalam penyerapan CO2 yaitu Spirrulina sp dengan kemampuan laju alir 1 l/menit dengan penyerapan sebesar 83,13 % dibanding Tetraselmis chuii dengan laju alir 1,5 l/menit dengan penyerapan sebesar 76,10 %.

Download Full-text

A photobioreactor using Nannochloropsis oculata marine microalgae for removal of polycyclic aromatic hydrocarbons and sorption of metals in produced water

Chemosphere ◽

10.1016/j.chemosphere.2021.130775 ◽

2021 ◽

pp. 130775

Author(s):

Isadora Machado Marques ◽

Adna Caroline Vale Oliveira ◽

Olivia Maria Cordeiro de Oliveira ◽

Emerson Andrade Sales ◽

Ícaro Thiago Andrade Moreira

Keyword(s):

Polycyclic Aromatic Hydrocarbons ◽

Aromatic Hydrocarbons ◽

Produced Water ◽

Nannochloropsis Oculata ◽

Marine Microalgae ◽

Polycyclic Aromatic

Download Full-text

Variability in Macro- and Micronutrients of 15 Commercially Available Microalgae Powders

Marine Drugs ◽

10.3390/md19060310 ◽

2021 ◽

Vol 19 (6) ◽

pp. 310

Author(s):

Fabian Sandgruber ◽

Annekathrin Gielsdorf ◽

Anja C. Baur ◽

Benjamin Schenz ◽

Sandra Marie Müller ◽

...

Keyword(s):

Fatty Acids ◽

Dunaliella Salina ◽

Haematococcus Pluvialis ◽

Saturated Fatty Acids ◽

Dry Weight ◽

Chlorella Pyrenoidosa ◽

Essential Amino Acids ◽

Arthrospira Platensis ◽

Omega 3 ◽

Tetraselmis Chuii

The nutrient composition of 15 commercially available microalgae powders of Arthrospira platensis, Chlorella pyrenoidosa and vulgaris, Dunaliella salina, Haematococcus pluvialis, Tetraselmis chuii, and Aphanizomenon flos-aquae was analyzed. The Dunaliella salina powders were characterized by a high content of carbohydrates, saturated fatty acids (SFAs), omega-6-polyunsaturated fatty acids (n6-PUFAs), heavy metals, and α-tocopherol, whereas the protein amounts, essential amino acids (EAAs), omega-3-PUFAs (n3-PUFAs), vitamins, and minerals were low. In the powder of Haematococcus pluvialis, ten times higher amounts of carotenoids compared to all other analyzed powders were determined, yet it was low in vitamins D and E, protein, and EAAs, and the n6/n3-PUFAs ratio was comparably high. Vitamin B12, quantified as cobalamin, was below 0.02 mg/100 g dry weight (d.w.) in all studied powders. Based on our analysis, microalgae such as Aphanizomenon and Chlorella may contribute to an adequate intake of critical nutrients such as protein with a high content of EAAs, dietary fibers, n3-PUFAs, Ca, Fe, Mg, and Zn, as well as vitamin D and E. Yet, the nutritional value of Aphanizomenon flos-aquae was slightly decreased by high contents of SFAs. The present data show that microalgae are rich in valuable nutrients, but the macro- and micronutrient profiles differ strongly between and within species.

Download Full-text

Removal of Pharmaceutical Micropollutants with Integrated Biochar and Marine Microalgae

Microorganisms ◽

10.3390/microorganisms9010004 ◽

2020 ◽

Vol 9 (1) ◽

pp. 4

Author(s):

Amin Mojiri ◽

Maedeh Baharlooeian ◽

Reza Andasht Kazeroon ◽

Hossein Farraji ◽

Ziyang Lou

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Response Surface Methodology ◽

Cell Viability ◽

Response Surface ◽

Contact Time ◽

Marine Microalgae ◽

Chaetoceros Muelleri ◽

Mean Squared Errors ◽

High Concentrations

Using microalgae to remove pharmaceuticals and personal care products (PPCPs) micropollutants (MPs) have attracted considerable interest. However, high concentrations of persistent PPCPs can reduce the performance of microalgae in remediating PPCPs. Three persistent PPCPs, namely, carbamazepine (CBZ), sulfamethazine (SMT) and tramadol (TRA), were treated with a combination of Chaetoceros muelleri and biochar in a photobioreactor during this study. Two reactors were run. The first reactor comprised Chaetoceros muelleri, as the control, and the second reactor comprised Chaetoceros muelleri and biochar. The second reactor showed a better performance in removing PPCPs. Through the response surface methodology, 68.9% (0.330 mg L−1) of CBZ, 64.8% (0.311 mg L−1) of SMT and 69.3% (0.332 mg L−1) of TRA were removed at the initial concentrations of MPs (0.48 mg L−1) and contact time of 8.1 days. An artificial neural network was used in optimising elimination efficiency for each MP. The rational mean squared errors and high R2 values showed that the removal of PPCPs was optimised. Moreover, the effects of PPCPs concentration (0–100 mg L−1) on Chaetoceros muelleri were studied. Low PPCP concentrations (<40 mg L−1) increased the amounts of chlorophyll and proteins in the microalgae. However, cell viability, chlorophyll and protein contents dramatically decreased with increasing PPCPs concentrations (>40 mg L−1).

Download Full-text