Effective and sustainable bioremediation of molybdenum pollutants from wastewaters by potential microalgae

Tambat, Vaibhav Sunil; Tseng, Yi-Sheng; Kumar, Prashant; Chen, Chiu-Wen; Singhania, Reeta Rani; Chang, Jo‐Shu; Dong, Cheng-Di; Patel, Anil Kumar

doi:10.1016/j.eti.2023.103091

Cited by 19 publications

(3 citation statements)

References 36 publications

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“…Furthermore, pH level plays a critical factor in affecting the ability of S. obliquus to remove copper and molybdenum. In this study, the pH level of S. obliquus culture and PW inside the PBR was above 7, whereas the optimum pH for these heavy metals adsorption by microalgae is below 7 (Saavedra et al 2018 ; Liu et al 2021 ; Novák et al 2020 ; Urrutia et al 2019 ; Tambat et al 2023 ).…”

Section: Resultsmentioning

confidence: 71%

Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor

Khairuddin,

Khan,

Sankaran

et al. 2024

Bioresour. Bioprocess.

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Produced water (PW) from oil and gas exploration adversely affects aquatic life and living organisms, necessitating treatment before discharge to meet effluent permissible limits. This study first used activated sludge to pretreat PW in a sequential batch reactor (SBR). The pretreated PW then entered a 13 L photobioreactor (PBR) containing Scenedesmus obliquus microalgae culture. Initially, 10% of the PW mixed with 90% microalgae culture in the PBR. After the exponential growth of the microalgae, an additional 25% of PW was added to the PBR without extra nutrients. This study reported the growth performance of microalgae in the PBR as well as the reduction in effluent’s total organic carbon (TOC), total dissolved solids (TDS), electrical conductivity (EC), and heavy metals content. The results demonstrated removal efficiencies of 64% for TOC, 49.8% for TDS, and 49.1% for EC. The results also showed reductions in barium, iron, and manganese in the effluent by 95, 76, and 52%, respectively.

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Section: Resultsmentioning

confidence: 71%

Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor

Khairuddin,

Khan,

Sankaran

et al. 2024

Bioresour. Bioprocess.

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“…Secara umum proses adsorbsi tidak dioperasikan pada temperatur tinggi maupun rendah karena akan meningkatkan biaya operasional dalam menyediakan sumber panas dan unit refrigerasi. Reaksi adsorpsi logam berat dapat bersifat eksotermis, sehingga efisiensi adsorbsi meningkat dengan penurunan temperatur (Tambat et al, 2023). Pernyataan ini telah dibuktikan dari hasil analisis termodinamika pada proses adsorbsi diberbagai suhu yang menghasilkan entalpi bernilai negatif.…”

Section: Pengaruh Temperatur Larutanunclassified

Studi Isoterm Adsorbsi dan Termodinamika Pada Proses Penyisihan Ion Fe (III) Menggunakan Pektin dari Kulit Pisang

Lestari,

Ristianingsih,

Istiani

et al. 2023

Eksergi

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Adsorben berupa pektin berhasil diekstraksi dari kulit pisang menggunakan larutan asam kuat dan telah digunakan untuk menyisihkan ion Fe 3+ dalam air. Pengaruh berbagai parameter terhadap proses adsorbsi, seperti waktu kontak, pH larutan, dosis adsorben, dan temperatur adsorbsi diinvestigasi dalam suatu sistem batch. Konsentrasi ion Fe 3+ dalam larutan air diukur menggunakan Atomic Absorption Spectrometry . Efisiensi adsorbsi terbaik diperoleh pada waktu kontak selama 4 jam, pH larutan 2, dosis adsorben sebesar 3 g, dan temperatur 20 o C. Mekanisme proses adsorbsi dan perubahan energi bebas Gibbs, entalpi, serta entropi telah dievalusi. Model isoterm Freundlich dan Temkin paling sesuai untuk menggambarkan mekanisme adsorbsi ion Fe 3+ pada pektin dengan R 2 berturut-turut 0,9871 dan 0,9591. Data parameter termodinamika membuktikan bahwa adsorpsi ion Fe 3+ bersifat eksotermis dan berlangsung secara tidak spontan pada rentang temperatur 20 hingga 60ᵒC. Penelitian ini menunjukkan bahwa kulit pisang dapat dimanfaatkan sebagai adsorben murah yang menjanjikan untuk menghilangkan ion Fe 3+ dalam air. Kata Kunci: pektin; ion Fe 3+ ; adsorbsi isoterm; termodinamika; kulit pisang ABSTRACT: The adsorbent in the form of pectin was successfully extracted from banana peels using a strong acid solution and has been used to remove Fe 3+ ions in water. The effect of various parameters on the adsorption process, such as contact time, solution pH, adsorbent dosage, and adsorption temperature was investigated in a batch system. The concentration of Fe 3+ ions in aqueous solutions was measured using Atomic Absorption Spectrometry. The best adsorption efficiency was obtained at a contact time of 4 hours, a solution pH of 2, an adsorbent dose of 3 g, and a temperature of 20 o C. The mechanism of the adsorption process and the change in Gibbs free energy, enthalpy, and entropy had evaluated. Freundlich and Temkin's isotherm model is more suitable to describe the mechanism of adsorption of Fe 3+ ions on pectin with R 2 of 0.9871 and 0.9591, respectively. The thermodynamic parameter data proves that the adsorption of Fe 3+ ions is exothermic and takes place unspontaneously at a temperature range of 20 to 60ᵒC. This study shows that banana peels can be used as a cheap adsorbent that promises to remove Fe 3+ ions in water.

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“…Until now, the main techniques are the aerobic process with anaerobic sedimentation [4], activated sludge process combined with ozonation [5], sludge retention time control and its biological decomposition [6], and high dissolved oxygen process [7] for the management of excess sludge produced in the activated sludge process has been reported. Since the disposal of excess sludge from purification sys tems in the environment is done either as compos t (fertilizer) or as landfill, the presence of heavy metal pollution plays an important and influential role in its disposal because the entry of heavy metals into the soil and the s tructure of plants, it will eventually appear in the human body through diffusion in water and dus t. Heavy metals such as arsenic (skin cancer) [8][9], cadmium (lung cancer) [10][11], copper (kidney and liver failure) [12], lead (des troying the nervous sys tem) [13], mercury (congenital abnormalities) [14][15], molybdenum (hyperactivity and convulsion factor) [16], nickel (cardiovascular abnormalities) [17] and selenium (kidney and liver des truction) [18] which are considered a serious threat to human health. There are many methods for determining and extracting heavy metals from different matrixes.…”

Section: Introductionmentioning

confidence: 99%

Design of sludge drying package pilot for removal of excess sludge in petrochemical industries: Heavy metals determination in sludge by polarography and atomic absorption spectrometry

Hassani,

Azemi Motlagh

2024

Anal. Method Environ. Chem. J.

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In this research, according to the high amount of sludge in a petrochemical company, an iron package type of drying sludge bed was made/designed with carbon steel. Then, the drying sludge pond was filled with layers of sand with different mesh sizes. The excess sludge from the sedimentation pond was passed over this bed, and the amount of sludge removed by the bed was obtained at %96. The values of heavy metal and microbial forms were determined using the proposed method based on activated sludge after wastewater treatment. For the validation process, 10 mL of deionized water (DW) was mixed with 1.0 g of dried sludge with pure nitric acid (2% HNO3), and then the solid phase was filtered with the Whatman filter (WF). The concentration of heavy metals (As, Cd, Cu, Pb, Hg, Mo, Ni, Co, Se, Zn) in the remaining solution of sludge (mg kg-1) and wastewater (µg L-1) was extracted/ separated based on sulfur-doped graphene oxide adsorbent (SDGO) by solid-phase microextraction procedure (SPME) before being determined by the flame and hydride generation atomic absorption spectrometry (F-AAS; HG-AAS) which had similar range to the polarography analysis. The LOD, linear range and preconcentration factor (PF) for metals were obtained.

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Effective and sustainable bioremediation of molybdenum pollutants from wastewaters by potential microalgae

Cited by 19 publications

References 36 publications

Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor

Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor

Studi Isoterm Adsorbsi dan Termodinamika Pada Proses Penyisihan Ion Fe (III) Menggunakan Pektin dari Kulit Pisang

Design of sludge drying package pilot for removal of excess sludge in petrochemical industries: Heavy metals determination in sludge by polarography and atomic absorption spectrometry

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