Alternative sorption filter materials effectively remove non-particulate organic pollutants from stormwater

Markiewicz, Anna; Strömvall, Ann-Margret Hvitt; Björklund, Karin

doi:10.1016/j.scitotenv.2020.139059

Cited by 14 publications

(7 citation statements)

References 50 publications

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“…The selectivity of sorbents occurs when they float the water's surface contaminated with oil, preferably removing the oil over water. [ 16 ] After that, the entire sorption system can be removed by the mechanical process. [ 17,18 ] Other properties inherent to hydrophobic and oleophilic materials can be mentioned, such as mechanical stability, biodegradability, cost–benefit ratio, and oil reuse potential and recovery, surface area, and porosity (pore size and volume).…”

Section: Introductionmentioning

confidence: 99%

“…[ 17,18 ] Other properties inherent to hydrophobic and oleophilic materials can be mentioned, such as mechanical stability, biodegradability, cost–benefit ratio, and oil reuse potential and recovery, surface area, and porosity (pore size and volume). [ 16,18–20 ] Shan et al [ 21 ] mentioned that MPs and oily components had a strong interaction due to the particle size (<5 mm), high hydrophobicity, stability, and MPs mobility.…”

Section: Introductionmentioning

confidence: 99%

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Envelopes with microplastics generated from recycled plastic bags for crude oil sorption

Martins

Zanini

Botelho

et al. 2021

Polymer Engineering & Sci

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Oil spill accidents in marine environments and the lack of disposal of post‐consumer plastic are environmental problems worldwide. This study presents a sustainable alternative for both issues through envelopes filled with microplastics (MPs) from recycled bags for the sorption of spilled crude oil. Through particle size analysis by three different sieves (4, 9, and 20 mesh), different MP sizes were characterized by scanning electron microscope (SEM), Brunauer–Emmett–Teller (BET), density, contact angle (CA), and Fourier‐transform infrared spectroscopy (FTIR). According to their sizes, the MPs were distributed in envelopes and submitted to crude oil sorption capacity and efficiency evaluation. Three MP particle sizes were obtained (from the largest to the smallest, according to the sieve mesh, MP4, MP9, and MP20). SEM images of samples exhibited irregular and porous surfaces, and MP4 had the smallest pore size (8.6 μm). BET showed that MP4 had the highest surface area (0.074 m2/g). The CA > 90° exposed that all samples were hydrophobic. FTIR spectrum demonstrated that the samples from the recycled bags were made of high density polyethylene (HDPE). The MP4 envelopes also had the best crude oil sorption results in capacity and efficiency (1.73 g/g and 68%, respectively), being a promising recycled sorbent in crude oil spillage applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Envelopes with microplastics generated from recycled plastic bags for crude oil sorption

Martins

Zanini

Botelho

et al. 2021

Polymer Engineering & Sci

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“…Markiewicz et al [ 29 ] have confirmed that DOM in sewage is adsorbed effectively by AC. The fluorescence spectrum after AC treatment showed that the fluorescence signal was very weak (Fig.…”

Section: Resultsmentioning

confidence: 99%

Water reuse and growth inhibition mechanisms for cultivation of microalga Euglena gracilis

et al. 2021

Biotechnol Biofuels

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Background Microalgae can contribute to more than 40% of global primary biomass production and are suitable candidates for various biotechnology applications such as food, feed products, drugs, fuels, and wastewater treatment. However, the primary limitation for large-scale algae production is the fact that algae requires large amounts of fresh water for cultivation. To address this issue, scientists around the world are working on ways to reuse the water to grow microalgae so that it can be grown in successive cycles without the need for fresh water. Results In this study, we present the results when we cultivate microalgae with cultivation water that is purified and reused. Specifically, we purify the cultivation water using an ultrafiltration membrane (UFM) treatment and investigate how this treatment affects: the biomass and biochemical components of the microalgae; characteristics of microalgae growth inhibitors; the mechanism whereby potential growth inhibitors are secreted (followed using metabolomics analysis); the effect of activated carbon (AC) treatment and advanced oxidation processes (AOPs) on the removal of growth inhibitors of Euglena gracilis. Firstly, the results show that E. gracilis can be only cultivated through two growth cycles with water that has been filtered and reused, and the growth of E. gracilis is significantly inhibited when the water is used a third time. Secondly, as the number of reused water cycles increases, the Cl− concentration gradually increases in the cultivation water. When the Cl− concentration accumulates to a level of fivefold higher than that of the control, growth of E. gracilis is inhibited as the osmolality tolerance range is exceeded. Interestingly, the osmolality of the reused water can be reduced by replacing NH4Cl with urea as the source of nitrogen in the cultivation water. Thirdly, E. gracilis secretes humic acid (HA)—which is produced by the metabolic pathways for valine, leucine, and isoleucine biosynthesis and by linoleic acid metabolism—into the cultivation water. Because HA contains large fluorescent functional groups, specifically extended π(pi)-systems containing C=C and C=O groups and aromatic rings, we were able to observe a positive correlation between HA concentration and the rate of inhibition of E. gracilis growth using fluorescence spectroscopy. Moreover, photosynthetic efficiency is adversely interfered by HA, thereby reductions in the synthetic efficiency of paramylon and lipid in E. gracilis. In this way, we are able to confirm that HA is the main growth inhibitor of E. gracilis. Finally, we verify that all the HA is removed or converted into nutrients efficiently by AC or UV/H2O2/O3 treatments, respectively. As a result of these treatments, growth of E. gracilis is restored (AC treatment) and the amount of biomass is promoted (UV/H2O2/O3 treatment). Conclusions These studies have important practical and theoretical significance for the cyclic cultivation of E. gracilis and for saving water resources. Our work may also provide a useful reference for other microalgae cultivation.

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“…Anna Markiewicz et al [102] assessed the performance of a pilot plant for the removal of non-particulate organic pollutants from urban runoff in Sweden. The separation system included a sand-column as pre-filter, which is in series with a granulated activated carbon, Sphagnum peat, or Pinus Fig.…”

Section: Recent Progress In Conventional Separation Methodsmentioning

confidence: 99%

Microplastics in Aquatic Environments: Recent Advances in Separation Techniques

Hadian-Ghazvini

Torkashvand

2022

Period. Polytech. Chem. Eng.

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Separation and removal of microplastic pollution from aquatic environments as a global environmental issue is classified as one of the major concerns in both water and wastewater treatment plants. Microplastics as polymeric particles less than 5 mm in at least one dimension are found with different shapes, chemical compositions, and sizes in soil, water, and sediments. Conventional treatment methods for organic separation have shown high removal efficiency for microplastics, while the separation of small microplastic particles, mainly less than 100 µm, in wastewater treatment plants is particularly challenging. This review aims to review the principle and application of different physical and chemical methods for the separation and removal of microplastic particles from aquatic environments, especially in water treatments process, with emphasis on some alternative and emerging separation methods. Advantages and disadvantages of conventional separation techniques such as clarification, sedimentation, floatation, activated sludge, sieving, filtration, and density separation are discussed. The advanced separation methods can be integrated with conventional techniques or utilize as a separate step for separating small microplastic particles. These advanced microplastic separation methods include membrane bioreactor, magnetic separation, micromachines, and degradation-based methods such as electrocatalysis, photocatalysis, biodegradation, and thermal degradation.

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Alternative sorption filter materials effectively remove non-particulate organic pollutants from stormwater

Cited by 14 publications

References 50 publications

Envelopes with microplastics generated from recycled plastic bags for crude oil sorption

Envelopes with microplastics generated from recycled plastic bags for crude oil sorption

Water reuse and growth inhibition mechanisms for cultivation of microalga Euglena gracilis

Microplastics in Aquatic Environments: Recent Advances in Separation Techniques

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