Muhammad Vohra, Abdullah Basaleh, Fayzul Kabir, Mohammad Al-Suwaiyan, Mehvish Bilal
Aqueous phase bromate (BrO 3– ) treatment using a commercial granular activated carbon (GAC, FILTRASORB 400) indicated that bromate removal is highly influenced by the operational factors such as pH, initial bromate concentration, contact time and the adsorbent dosage. The effect of pH on bromate treatment indicated higher to significant bromate removal at pH ≤ 4, whereas for pH range 5–9 ~ 50% bromate removal was noted. At pH higher than 9, a significant decrease in the bro - mate removal was noted that was ascribed to changes in the GAC surface speciation. Furthermore, a higher mass-based bromate removal transpired with an increase in the initial bromate concen - tration that was explained based on higher mass transfer and diffusion. Also, the bromate adsorp - tion experimental data fitted well to the Freundlich adsorption isotherm, indicating a multilayer bromate ions accumulation on the GAC surface. Furthermore, an increasing ‘ q e vs. C e ’ trend also implied a multilayer bromate ions attachment on the GAC surface. Moreover, the kinetics exper - iments showed that the pseudo-second-order kinetic model better describes the respective GAC-based bromate removal as compared to pseudo-first-order kinetic model. This indirectly indicated that the removal of bromate using granular activated carbon is a more involved process, with both adsorption and reduction causing the noted bromate removal ( GAC-BrO 3 ↔ GAC-BrO ↔ GAC -Br). It is suggested that initially the adsorbed BrO 3 – ion is reduced to BrO – (hypobromite) followed by a further reduction of BrO – to Br – (bromide) ion. Additionally, as the surface bound bromate ion is reduced to bromide, it would cause further mass transfer of solution phase bromate ion towards the GAC surface, which is also indirectly supported by the aforementioned Freundlich based multilayer bromate removal trend.
{"title":"Aqueous bromate (BrO3-) removal using FILTRASORB 400 activated carbon: effect of process variables and modeling","authors":"Muhammad Vohra, Abdullah Basaleh, Fayzul Kabir, Mohammad Al-Suwaiyan, Mehvish Bilal","doi":"10.5004/dwt.2023.29671","DOIUrl":"https://doi.org/10.5004/dwt.2023.29671","url":null,"abstract":"Aqueous phase bromate (BrO 3– ) treatment using a commercial granular activated carbon (GAC, FILTRASORB 400) indicated that bromate removal is highly influenced by the operational factors such as pH, initial bromate concentration, contact time and the adsorbent dosage. The effect of pH on bromate treatment indicated higher to significant bromate removal at pH ≤ 4, whereas for pH range 5–9 ~ 50% bromate removal was noted. At pH higher than 9, a significant decrease in the bro - mate removal was noted that was ascribed to changes in the GAC surface speciation. Furthermore, a higher mass-based bromate removal transpired with an increase in the initial bromate concen - tration that was explained based on higher mass transfer and diffusion. Also, the bromate adsorp - tion experimental data fitted well to the Freundlich adsorption isotherm, indicating a multilayer bromate ions accumulation on the GAC surface. Furthermore, an increasing ‘ q e vs. C e ’ trend also implied a multilayer bromate ions attachment on the GAC surface. Moreover, the kinetics exper - iments showed that the pseudo-second-order kinetic model better describes the respective GAC-based bromate removal as compared to pseudo-first-order kinetic model. This indirectly indicated that the removal of bromate using granular activated carbon is a more involved process, with both adsorption and reduction causing the noted bromate removal ( GAC-BrO 3 ↔ GAC-BrO ↔ GAC -Br). It is suggested that initially the adsorbed BrO 3 – ion is reduced to BrO – (hypobromite) followed by a further reduction of BrO – to Br – (bromide) ion. Additionally, as the surface bound bromate ion is reduced to bromide, it would cause further mass transfer of solution phase bromate ion towards the GAC surface, which is also indirectly supported by the aforementioned Freundlich based multilayer bromate removal trend.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Due to climate change in recent years, the degradation of most glaciers on the Qinghai–Tibet Plateau has accelerated the expansion of glacial lakes. Based on the polarization entropy difference between water and non-water signals, this paper studies the classification method of glacial lake in snowmelt period by using the dual-polarization time series synthetic aperture radar (SAR) images as data sources, and proposes a method for extracting and dynamically monitoring glacial lake based on the normalized polarization entropy ratio of dual-polarization SAR images. In order to verify the feasibility of the method, the Sentinel-1 dual-polarization image sequence of ESA was selected to carry out the dynamic extraction of glacial lakes and the analysis of long-term temporal variations on a time span of 4a for the typical experimental area located in the glacier basin of A’nyemaqen. The spatial and temporal changes of the glacial lake at the end of the A’nyemaqen glacier during 2019–2022 were successfully obtained through experiments, and then it was found that the area of the glacial lake near 4a was decreasing.
{"title":"Monitoring of interannual variabilities of glacial lakes at the end of A’nyemaqen glacier utilizing PolSAR images","authors":"Rui Guo, Qiming Zeng","doi":"10.5004/dwt.2023.29693","DOIUrl":"https://doi.org/10.5004/dwt.2023.29693","url":null,"abstract":"Due to climate change in recent years, the degradation of most glaciers on the Qinghai–Tibet Plateau has accelerated the expansion of glacial lakes. Based on the polarization entropy difference between water and non-water signals, this paper studies the classification method of glacial lake in snowmelt period by using the dual-polarization time series synthetic aperture radar (SAR) images as data sources, and proposes a method for extracting and dynamically monitoring glacial lake based on the normalized polarization entropy ratio of dual-polarization SAR images. In order to verify the feasibility of the method, the Sentinel-1 dual-polarization image sequence of ESA was selected to carry out the dynamic extraction of glacial lakes and the analysis of long-term temporal variations on a time span of 4a for the typical experimental area located in the glacier basin of A’nyemaqen. The spatial and temporal changes of the glacial lake at the end of the A’nyemaqen glacier during 2019–2022 were successfully obtained through experiments, and then it was found that the area of the glacial lake near 4a was decreasing.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Abujazar, S. U. Karaağaç, S. A. Abu Amr, S. Fatihah, M. Bashir, M. Alazaiza, A. Yusof, Mohamad Abou Auda
{"title":"Factorial design and optimization of pinecone seed powder as a natural coagulant for organic and heavy metals removal from industrial wastewater","authors":"M. Abujazar, S. U. Karaağaç, S. A. Abu Amr, S. Fatihah, M. Bashir, M. Alazaiza, A. Yusof, Mohamad Abou Auda","doi":"10.5004/dwt.2023.29199","DOIUrl":"https://doi.org/10.5004/dwt.2023.29199","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74809030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhengan Zhang, Juanfang Shang, Yuying Li, Lin Li, Yujiao Ye, Xia Hua, Bailian Li
{"title":"Optimizing of ultraviolet initiated template polymerization of cationic polyacrylamide by response surface methodology","authors":"Zhengan Zhang, Juanfang Shang, Yuying Li, Lin Li, Yujiao Ye, Xia Hua, Bailian Li","doi":"10.5004/dwt.2023.29475","DOIUrl":"https://doi.org/10.5004/dwt.2023.29475","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"18 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74889723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Cherouaki, Youssef Gherraby, R. Bassam, S. Belaaouad, J. Naja
This work investigates the adsorption and the photocatalytic degradation performance of dyes (methylene blue (MB) and methyl orange (MO)) on the surface of raw bentonite (Raw-B) and doped bentonite with titanium oxide (TiO 2 -B). The bentonite was selected from the Nador region in north- ern Morocco, it was doped with various TiO 2 mass ratios. The structural, mineralogical and mor- phological composition of Raw-B and TiO 2 -B was characterized using several techniques including inductively coupled plasma atomic emission spectroscopy, X-ray diffraction, Fourier-transform infrared, transmission electron microscopy, and energy-dispersive X-ray analysis. The adsorption process of MB and MO were affected according to the Langmuir and Freundlich isotherms. The maximum removal capacity of MB and MO were around 60.97 and 142.85 mg/g, respectively. MB and MO degression ratios achieved 100% under a lamp irradiation at 245 nm. The results obtained show that the application of titanium oxide-doped bentonite has a very high performance in wastewater treatment.
{"title":"Adsorption and photocatalytic degradation investigation of organic dyes on TiO2-bentonite surface in aqueous solution","authors":"R. Cherouaki, Youssef Gherraby, R. Bassam, S. Belaaouad, J. Naja","doi":"10.5004/dwt.2023.29470","DOIUrl":"https://doi.org/10.5004/dwt.2023.29470","url":null,"abstract":"This work investigates the adsorption and the photocatalytic degradation performance of dyes (methylene blue (MB) and methyl orange (MO)) on the surface of raw bentonite (Raw-B) and doped bentonite with titanium oxide (TiO 2 -B). The bentonite was selected from the Nador region in north- ern Morocco, it was doped with various TiO 2 mass ratios. The structural, mineralogical and mor- phological composition of Raw-B and TiO 2 -B was characterized using several techniques including inductively coupled plasma atomic emission spectroscopy, X-ray diffraction, Fourier-transform infrared, transmission electron microscopy, and energy-dispersive X-ray analysis. The adsorption process of MB and MO were affected according to the Langmuir and Freundlich isotherms. The maximum removal capacity of MB and MO were around 60.97 and 142.85 mg/g, respectively. MB and MO degression ratios achieved 100% under a lamp irradiation at 245 nm. The results obtained show that the application of titanium oxide-doped bentonite has a very high performance in wastewater treatment.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73122065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nature-based solutions enhanced by reactive materials for the protection of urban water bodies","authors":"A. Bus, A. Karczmarczyk, A. Baryła","doi":"10.5004/dwt.2023.28859","DOIUrl":"https://doi.org/10.5004/dwt.2023.28859","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"15 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75466374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Chicken bone ash is a cost-effective and efficient adsorbent for phenol removal from aqueous solution","authors":"M. Fawzy, H. M. Ahmed, Hossam F. Nassar","doi":"10.5004/dwt.2023.29141","DOIUrl":"https://doi.org/10.5004/dwt.2023.29141","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"83 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82655970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muhammad Zahoor, Azmat Ullah, Jawad Ikram, Muhammad Naveed Umar, Riaz Ullah
In this study, a potato wastes based magnetic carbon nanocomposite (PMCNC) was synthesized and explored for its possible applications as adsorbent in removal of lambda-cyhalothrin from synthetically contaminated water. The nanocomposites were characterized through energy-dispersive X-ray, X-ray diffraction analysis, scanning electron microscopy, Fourier-transform infrared spectrophotometry, zero-point charge (pH pzc ) and thermogravimetric/differential thermal analysis. For the demonstration of adsorption efficiency of the nanocomposite, batch adsorption experiments were carried out. Maximum removal of selected pollutant was achieved in 30 min. Several kinetic and isotherm models were applied to the sorption kinetics and isothermal data. The pseudo-sec-ond-order kinetics fitted well the data. The X max (maximum adsorption) at 50°C was recorded as 14.025 mg/g with K 2 (pseudo-second-order kinetics constant) value of 0.0162 and R 2 value of 0.99. The adsorption isotherm data fitted well the Langmuir isotherm model. The optimum pH for the removal of lambda-cyhalothrin was achieved at pH 5. 0.1 g of PMCNC was used as optimum dose in all experiments. The negative value of Gibbs free energy reveals that the removal of lambda-cyhalo-thrin is a spontaneous process. Due to the excellent adsorption capability and easy separation from slurry after use through the application of magnet the PMCNC can be effectively used as an effective sorbent alternative to activated carbon for the removal of inorganic and organic contaminants from aquatic media. This nanocomposite could compete with other adsorbents in the field of surface chemistry warranting further experimentation.
本研究合成了一种马铃薯废物基磁性碳纳米复合材料(PMCNC)，并探索了其作为吸附剂去除合成污染水中的高效氯氟氰菊酯的可能性。通过能量色散x射线、x射线衍射分析、扫描电镜、傅里叶变换红外分光光度计、零点电荷(pH pzc)和热重/差热分析对纳米复合材料进行了表征。为了验证纳米复合材料的吸附效率，进行了批量吸附实验。选定污染物的最大去除在30分钟内实现。几种动力学和等温模型应用于吸附动力学和等温数据。拟二、二阶动力学与数据拟合较好。50℃时最大吸附量为14.025 mg/g，准二级动力学常数k2为0.0162,r2为0.99。吸附等温线数据与Langmuir等温线模型拟合良好。pH为5时，氯氟氰菊酯脱除效果最佳。所有实验均以0.1 g PMCNC为最佳剂量。吉布斯自由能为负值，表明氯氰菊酯的去除是一个自发过程。由于优异的吸附能力和使用后易于从浆料中分离，通过磁铁的应用，PMCNC可以有效地用作活性炭的有效吸附剂，用于去除水生介质中的无机和有机污染物。这种纳米复合材料可以在表面化学领域与其他吸附剂竞争，需要进一步的实验。
{"title":"Separation of organic pesticide (insecticide): lambda-cyhalothrin from wastewater using magnetic carbon nanocomposites","authors":"Muhammad Zahoor, Azmat Ullah, Jawad Ikram, Muhammad Naveed Umar, Riaz Ullah","doi":"10.5004/dwt.2023.29588","DOIUrl":"https://doi.org/10.5004/dwt.2023.29588","url":null,"abstract":"In this study, a potato wastes based magnetic carbon nanocomposite (PMCNC) was synthesized and explored for its possible applications as adsorbent in removal of lambda-cyhalothrin from synthetically contaminated water. The nanocomposites were characterized through energy-dispersive X-ray, X-ray diffraction analysis, scanning electron microscopy, Fourier-transform infrared spectrophotometry, zero-point charge (pH pzc ) and thermogravimetric/differential thermal analysis. For the demonstration of adsorption efficiency of the nanocomposite, batch adsorption experiments were carried out. Maximum removal of selected pollutant was achieved in 30 min. Several kinetic and isotherm models were applied to the sorption kinetics and isothermal data. The pseudo-sec-ond-order kinetics fitted well the data. The X max (maximum adsorption) at 50°C was recorded as 14.025 mg/g with K 2 (pseudo-second-order kinetics constant) value of 0.0162 and R 2 value of 0.99. The adsorption isotherm data fitted well the Langmuir isotherm model. The optimum pH for the removal of lambda-cyhalothrin was achieved at pH 5. 0.1 g of PMCNC was used as optimum dose in all experiments. The negative value of Gibbs free energy reveals that the removal of lambda-cyhalo-thrin is a spontaneous process. Due to the excellent adsorption capability and easy separation from slurry after use through the application of magnet the PMCNC can be effectively used as an effective sorbent alternative to activated carbon for the removal of inorganic and organic contaminants from aquatic media. This nanocomposite could compete with other adsorbents in the field of surface chemistry warranting further experimentation.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"56 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83406236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Contents Vol. 284","authors":"","doi":"10.5004/dwt.2023.29462","DOIUrl":"https://doi.org/10.5004/dwt.2023.29462","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"12 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78476844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effective separation of toxic azo dyes from water system using the activated carbon derived from Prosopis juliflora roots","authors":"J. Nayagam, K. Prasanna, P. Senthil kumar","doi":"10.5004/dwt.2023.29216","DOIUrl":"https://doi.org/10.5004/dwt.2023.29216","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"27 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74011979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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