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Taghavijeloudar, Mohsen,Park, Junboum,Hashemi, Shervin,Han, Mooyoung Elsevier 2019 Bioresource technology Vol.273 No.-
<P><B>Abstract</B></P> <P>The application of pressure filtration in microalgae harvesting requires chemical pretreatment in order to reduce membrane fouling and to increase water flux. Surfactants have shown potential to enhance microalgae dewaterability by charge neutralization, bridging and releasing extracellular polymeric substances (EPS) and bound water. In this study, the effect of three surfactants including anionic sodium dodecyl sulfate (SDS), non-ionic triton X-100 and cationic cetyl trimethyl ammonium bromide (CTAB) on the dewaterability of <I>Chlamydomonas</I> sp. was investigated. Filtration fluxes and biomass concentrations were used to evaluate the microalgae dewaterability. Based on the results, SDS and Triton X-100 had a negative effect on the dewaterability of microalgae biomass. However, CTAB improved the dewaterability by decreasing the reversible and irreversible fouling resistance. The optimum dosage of CTAB was found to be 1500 mg/L, and resulted in 95.8% and 140% improvement on average water flux and biomass recovery efficiency, respectively.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The effect of surfactant on the dewaterability of microalgae was investigated. </LI> <LI> Dose of SDS and Triton X-100 caused a significant deterioration in dewaterability. </LI> <LI> CTAB is found as suitable pretreatment to improve microalgae dewaterability. </LI> <LI> 140% biomass recovery efficiency is obtained. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Microplastics pollution in different aquatic environments and biota: A review of recent studies
Rezania, Shahabaldin,Park, Junboum,Md Din, Mohd Fadhil,Mat Taib, Shazwin,Talaiekhozani, Amirreza,Kumar Yadav, Krishna,Kamyab, Hesam Elsevier 2018 MARINE POLLUTION BULLETIN Vol.133 No.-
<P><B>Abstract</B></P> <P>Microplastics (MPs) are generated from plastic and have negative impact to our environment due to high level of fragmentation. They can be originated from various sources in different forms such as fragment, fiber, foam and so on. For detection of MPs, many techniques have been developed with different functions such as microscopic observation, density separation, Raman and FTIR analysis. Besides, due to ingestion of MPs by wide range of marine species, research on the effect of this pollution on biota as well as human is vital. Therefore, we comprehensively reviewed the occurrence and distribution of MPs pollution in both marine and freshwater environments, including rivers, lakes and wastewater treatment plants (WWTPs). For future studies, we propose the development of new techniques for sampling MPs in aquatic environments and biota and recommend more research regarding MPs release by WWTPs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> MPs pollution in different aqueous environments and biota is reviewed. </LI> <LI> MPs pollution in marine and fresh waters were studied more than WWTPs. </LI> <LI> Wide range of marine biota ingested different types of MPs. </LI> <LI> Future studies should focused on treatment as detection is well developed. </LI> </UL> </P>