Effects of Chemical Properties of Cyanotoxins on Transport through Granular Activated Carbons
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University of Cincinnati / OhioLINK
2018
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535374137804276 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-ucin15353741378042762021-08-03T07:08:18Z Effects of Chemical Properties of Cyanotoxins on Transport through Granular Activated Carbons Chen, Bingran Environmental Engineering cyanotoxins GAC chemical properties Cyanobacteria are microorganisms that can multiply to produce harmful algal blooms (HABs) under favorable conditions in the fresh waters. Many genera of cyanobacteria are identified capable of producing cyanotoxins, which are may lead to irritation, illness or even death in pets, livestock and humans. Microcystins and cylindrospermosin are examples of toxins that are often detected in the fresh water. Granular activated carbon (GAC) adsorption is considered to be one of the most successful techniques to eradicate dissolved cyanotoxins from fresh water. Numerous researches was conducted using virgin GAC that investigated the factors, which influence the adsorptions with the use of Rapid Small Scale Column Test (RSSCT). However, only a small number of studies focused on the use of reactivated GAC and assessed whether the chemical properties of cyanotoxins had an influence on the course of adsorption. This study aims to evaluate the effects of chemical properties of cyanotoxins (i.e., MC-LR, MC-RR and CYN) on adsorption by GAC and also to study the effect of physical properties (i.e., virgin vs. reactivated) of GACs on the eradication of cyanotoxins. The eradication efficiency of three cyanotoxins (i.e. MC-LR, MC-RR, and CYN) with the two GACs (i.e. virgin GAC and reactivated GAC) was tested. The results indicated that the breakthrough was only observed from using the reactivated GAC column with CYN at the end of operation. This observation could be due to the lower molecular weight and greater hydrophilicity of the CYN compared to MC-LR and MC-RR.In addition, as compared to the reactivated GAC, the virgin GAC exhibited a higher success in eradicating cyanotoxins, together with the total organic carbon (TOC) and dissolved organic carbon (DOC) in the substrate. The reason is that micropore allows better and greater adsorption due to its small pore size and its special structure. Hence, the virgin GAC with more micropore demonstrated better action than the reactivated GAC. 2018-10-30 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535374137804276 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535374137804276 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Environmental Engineering cyanotoxins GAC chemical properties |
| spellingShingle |
Environmental Engineering cyanotoxins GAC chemical properties Chen, Bingran Effects of Chemical Properties of Cyanotoxins on Transport through Granular Activated Carbons |
| author |
Chen, Bingran |
| author_facet |
Chen, Bingran |
| author_sort |
Chen, Bingran |
| title |
Effects of Chemical Properties of Cyanotoxins on Transport through Granular Activated Carbons |
| title_short |
Effects of Chemical Properties of Cyanotoxins on Transport through Granular Activated Carbons |
| title_full |
Effects of Chemical Properties of Cyanotoxins on Transport through Granular Activated Carbons |
| title_fullStr |
Effects of Chemical Properties of Cyanotoxins on Transport through Granular Activated Carbons |
| title_full_unstemmed |
Effects of Chemical Properties of Cyanotoxins on Transport through Granular Activated Carbons |
| title_sort |
effects of chemical properties of cyanotoxins on transport through granular activated carbons |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2018 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535374137804276 |
| work_keys_str_mv |
AT chenbingran effectsofchemicalpropertiesofcyanotoxinsontransportthroughgranularactivatedcarbons |
| _version_ |
1719454583210639360 |