アジア・オセアニア研究教育機構(Q-AOS)ポスターセッション

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発表者

8.ASMAA KAMALELDEEN AHMED MOHAMED REZK ELNAGDY(農学研究院・博士課程)
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Suspect and non-target screening of emerging contaminants in wastewater using LC-QTOF/MS: An insight on occurrence, fate, risk, and wastewater management in Asia
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Domestic wastewater is a major pollution source to water environment in many Asian countries. In the respect of water environmental conservation,it is important to reduce the pollution load from domestic sector. Therefore, a comprehensive suspect and non-target screening workflow based on LC-QTOF/MS was developed for identification of contaminants in wastewater. Occurrence, fate and risk was studied. Multivariate analysis demonstrated an effective wastewater treatment process.The workflow would have wider implication in wastewater management in Asia region.

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過去の意見交換

タイトル
Nice Work
コメント
Nice work, promising results
投稿者
G
投稿日
2021/10/16
タイトル
Excellent
コメント
I am very interested in the design of the work-flow and prospective applications of it in water treatment. I am expecting this method will be highly valuable for water treatment and validation for developing countries. Thank you for sharing your results!
投稿者
KUMAR S.
投稿日
2021/10/16
タイトル
How to reduce toxic material
コメント
Thank you for the very interesting research presentation. You have identified the compounds and toxicity of the waste water. I know it is outside your research, but how difficult or is it possible in the first place to remove the toxic materials according to the compounds you have specified.
投稿者
Ueda
投稿日
2021/10/18
タイトル
Nice Work
コメント
Thank you very much Sir for your comment
投稿者
Asmaa Kamal El-Deen
投稿日
2021/10/19
タイトル
Excellent
コメント
Thank you very much Sir for your comment. I also hope the workflow can find its application in identifying contaminants in waste water as a first step in water treatment.
投稿者
Asmaa Kamal El-Deen
投稿日
2021/10/19
タイトル
How to reduce toxic material
コメント
Thank you very much sir for your question. For the removal of the specified compounds, they can be removed by optimizing the treatment parameters in the wastewater treatment centers. For examples, the treatment center from where I collected the samples are using different treatment steps including activated sludge, aerobic and anaerobic bacteria, and finally chlorination for contaminants’ removal. Depending on the physicochemical properties of the identified compounds, they can optimize the treatment steps by which each class is expected to be removed and so on. Some compounds are easily oxidized and could be removed by chlorination, others have high partition coefficients and can by removed by activated sludge, and some have tendency to be removed by biological reaction. So, they can optimize different factors like the hydraulic retention time (HRT), sludge retention time (SRT), chlorine amount,…etc. Thank you again for the important question.
投稿者
Asmaa Kamal El-Deen
投稿日
2021/10/19
タイトル
Question
コメント
Thank you for sharing your work. I have a small simple question, what might be the class of compounds with intensity increased during treatment? Could you please give more explanation and examples about this class of compounds?
投稿者
Yu-Qi
投稿日
2021/10/19
タイトル
Reply to Question
コメント
Thank you Sir for your question. Regarding the compounds with an intensity increased after treatment, most of them is supposed to be degradation and transformation products. For example, we identified the pharmaceutical carbamazepine and also identified its major metabolite and transformation product, carbamazepine epoxied. The concentration of this metabolite is increased after treatment which means it formed from the degradation of the parent compound. On the other hand, some parents compounds showed higher concentration after treatment (this is called negative elimination rate). This might attribute to various reasons. The first main reason is the deconjugation of the sulfate or glucuronic acid conjugates during treatment to give the parent compounds. The second is the desorption from fecal particles or it may result from grab sampling. Samples, that were not sampled with a hydraulic lag, may bring some error in due to diurnal variation of the concentration. Thanks again for your question.
投稿者
Asmaa Kamal El-Deen
投稿日
2021/10/19