Pub Date : 2025-02-03DOI: 10.1016/j.jwpe.2025.107129
Yunfeng Zhang , Haoyuan Qin , Xinhai Sun , Zhiqiang Zhao , Jianhua Hou , Chunsheng Li , Weilong Shi
Photo-Fenton process is known as an effective water treatment method due to its high efficiency, however, its application is limited by the need for exogenous hydrogen peroxide (H2O2). In this paper, a photo-self-Fenton system utilizing hydroxyl-modified tubular g-C3N4 (TCN-OH) as a photocatalyst to produce H2O2 in-situ to combine Fe ions was developed. The tubular morphology of TCN-OH enhances carrier mobility and increases the number of active sites available for H2O2 production. Meanwhile, the addition of Fe3+ facilitates the activation of hydroxyl radical (·OH) reactive species from H2O2, leading to the efficient degradation of tetracycline (TC) antibiotic pollutants under visible light irradiation. This study provides a conceptual design strategy for constructing optical-self-Fenton systems, providing a promising approach for the efficient treatment of industrial wastewater effluents.
{"title":"Boosting hydrogen peroxide production in tubular carbon nitride with hydroxy modification for high-efficient photo-self-Fenton antibiotic degradation","authors":"Yunfeng Zhang , Haoyuan Qin , Xinhai Sun , Zhiqiang Zhao , Jianhua Hou , Chunsheng Li , Weilong Shi","doi":"10.1016/j.jwpe.2025.107129","DOIUrl":"10.1016/j.jwpe.2025.107129","url":null,"abstract":"<div><div>Photo-Fenton process is known as an effective water treatment method due to its high efficiency, however, its application is limited by the need for exogenous hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>). In this paper, a photo-self-Fenton system utilizing hydroxyl-modified tubular g-C<sub>3</sub>N<sub>4</sub> (TCN-OH) as a photocatalyst to produce H<sub>2</sub>O<sub>2</sub> in-situ to combine Fe ions was developed. The tubular morphology of TCN-OH enhances carrier mobility and increases the number of active sites available for H<sub>2</sub>O<sub>2</sub> production. Meanwhile, the addition of Fe<sup>3+</sup> facilitates the activation of hydroxyl radical (·OH) reactive species from H<sub>2</sub>O<sub>2</sub>, leading to the efficient degradation of tetracycline (TC) antibiotic pollutants under visible light irradiation. This study provides a conceptual design strategy for constructing optical-self-Fenton systems, providing a promising approach for the efficient treatment of industrial wastewater effluents.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"71 ","pages":"Article 107129"},"PeriodicalIF":6.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-03DOI: 10.1016/j.jwpe.2025.107112
Jie Liu , Minlong Li , Zhiming Diao , Jiawan Guo , Yintong Liang , Zhien Fang , Feng Li , Guangwei Yu , Yuhai Liang
Anammox has a very broad application for the treatment of low carbon/nitrogen and high ammonia nitrogen wastewater. In sewage treatment, the anammox granular sludge systems would be affected due to a large number of aluminum salt coagulant or phosphorus removal agent. Therefore, this paper investigated the effect of aluminum ions on the nitrogen removal performance and sludge characteristics of anammox granular sludge. Under low-concentration conditions of aluminum ions (5–20 mg·L−1), nitrogen removal performance was significantly enhanced, particularly at 20 mg·L−1. However, above 30 mg·L−1 concentration, the anammox system gradually collapsed. In the range of 30–100 mg·L−1, the abundance of anammox bacteria did not change considerably, but the nitrogen removal performance was significantly decreased due to the colloidal layer formed by the hydrolysis of aluminum ions. When aluminum ion concentration was 200 mg·L−1, both the genus Candidatus_Brocadia and hzsB gene copy number were notably reduced, anammox bacteria were significantly inhibited by aluminum ion toxicity. These results indicate that the effects of aluminum ion coagulants on anammox granular sludge system include toxicity inhibition and mass transfer.
{"title":"Effects of aluminum ions on anaerobic ammonium oxidation granular sludge systems: Performance, microbial characteristics and mechanisms","authors":"Jie Liu , Minlong Li , Zhiming Diao , Jiawan Guo , Yintong Liang , Zhien Fang , Feng Li , Guangwei Yu , Yuhai Liang","doi":"10.1016/j.jwpe.2025.107112","DOIUrl":"10.1016/j.jwpe.2025.107112","url":null,"abstract":"<div><div>Anammox has a very broad application for the treatment of low carbon/nitrogen and high ammonia nitrogen wastewater. In sewage treatment, the anammox granular sludge systems would be affected due to a large number of aluminum salt coagulant or phosphorus removal agent. Therefore, this paper investigated the effect of aluminum ions on the nitrogen removal performance and sludge characteristics of anammox granular sludge. Under low-concentration conditions of aluminum ions (5–20 mg·L<sup>−1</sup>), nitrogen removal performance was significantly enhanced, particularly at 20 mg·L<sup>−1</sup>. However, above 30 mg·L<sup>−1</sup> concentration, the anammox system gradually collapsed. In the range of 30–100 mg·L<sup>−1</sup>, the abundance of anammox bacteria did not change considerably, but the nitrogen removal performance was significantly decreased due to the colloidal layer formed by the hydrolysis of aluminum ions. When aluminum ion concentration was 200 mg·L<sup>−1</sup>, both the genus <em>Candidatus_Brocadia</em> and <em>hzsB</em> gene copy number were notably reduced, anammox bacteria were significantly inhibited by aluminum ion toxicity. These results indicate that the effects of aluminum ion coagulants on anammox granular sludge system include toxicity inhibition and mass transfer.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"71 ","pages":"Article 107112"},"PeriodicalIF":6.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-03DOI: 10.1016/j.jwpe.2025.107146
Morish Azabo , Amal Abdelhaleem , Mahmoud Nasr
While several studies have employed phytoremediation to treat surfactant-laden kitchen wastewater (SLKWW), there exists a research gap in addressing the profitability, sustainability, and environmental effects related to spent plant valorization. This work utilizes water hyacinth for SLKWW phytoremediation, followed by managing the exhausted aquatic macrophyte by either direct disposal into landfills (Scenario#1), or pyrolysis to generate biochar used as an adsorbent for post-treatment (Scenario#2). The best scenario was selected based on the techno-financial study, life cycle analysis (LCA) impact categories, and sustainable development goals (SDGs) achieved. The phytotechnology was operated under 23 ± 2 °C, light:dark cycle of 18:6 h:h, 65 ± 5 % relative humidity, plant density (1.0–4.0 kg m−2), pH (3–11), and retention time (4–14 d), getting maximum surfactant removal efficiency = 97.45 ± 4.62 %. The exhausted plant biomass was pyrolyzed at 500 °C for 120 min to produce biochar used as an adsorbent for effluent treatment, achieving 91.39 ± 4.43 % surfactant removal at adsorbent dosage = 8.9 g L−1, pH = 4.3, and time = 135 min. The techno-economic investigation demonstrated that Scenario#2 was the desired pathway with enhanced financial performance (net present value = 12.5 US$, internal rate of return = 8.2 %, and payback period = 7.1 years), and superior LCA environmental benefits related to human health and carbon credit. The study outcomes comply with SDG_3 “protect human health from landfill leachate”, SDG_6 “surfactant-laden kitchen wastewater treatment”, SDG_7 “exhausted plant pyrolysis”, and SDG_12 “recycling of plant residues”. Further studies should focus on the sustainable management of the exhausted adsorbent after SLKWW post-treatment to avoid the risk of secondary pollution.
{"title":"Feasibility of phytoremediation/pyrolysis/adsorption framework for valorization of water hyacinth: Life cycle assessment, techno-economics, and sustainability pillars","authors":"Morish Azabo , Amal Abdelhaleem , Mahmoud Nasr","doi":"10.1016/j.jwpe.2025.107146","DOIUrl":"10.1016/j.jwpe.2025.107146","url":null,"abstract":"<div><div>While several studies have employed phytoremediation to treat surfactant-laden kitchen wastewater (SLKWW), there exists a research gap in addressing the profitability, sustainability, and environmental effects related to spent plant valorization. This work utilizes water hyacinth for SLKWW phytoremediation, followed by managing the exhausted aquatic macrophyte by either direct disposal into landfills (Scenario#1), or pyrolysis to generate biochar used as an adsorbent for post-treatment (Scenario#2). The best scenario was selected based on the techno-financial study, life cycle analysis (LCA) impact categories, and sustainable development goals (SDGs) achieved. The phytotechnology was operated under 23 ± 2 °C, light:dark cycle of 18:6 h:h, 65 ± 5 % relative humidity, plant density (1.0–4.0 kg m<sup>−2</sup>), pH (3–11), and retention time (4–14 d), getting maximum surfactant removal efficiency = 97.45 ± 4.62 %. The exhausted plant biomass was pyrolyzed at 500 °C for 120 min to produce biochar used as an adsorbent for effluent treatment, achieving 91.39 ± 4.43 % surfactant removal at adsorbent dosage = 8.9 g L<sup>−1</sup>, pH = 4.3, and time = 135 min. The techno-economic investigation demonstrated that Scenario#2 was the desired pathway with enhanced financial performance (net present value = 12.5 US$, internal rate of return = 8.2 %, and payback period = 7.1 years), and superior LCA environmental benefits related to human health and carbon credit. The study outcomes comply with SDG_3 “protect human health from landfill leachate”, SDG_6 “surfactant-laden kitchen wastewater treatment”, SDG_7 “exhausted plant pyrolysis”, and SDG_12 “recycling of plant residues”. Further studies should focus on the sustainable management of the exhausted adsorbent after SLKWW post-treatment to avoid the risk of secondary pollution.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"71 ","pages":"Article 107146"},"PeriodicalIF":6.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jwpe.2025.107017
Xiaocong Liu , Fuping Zhang , Yi Wang , Bo Xing , Guo Yang , Min Li , Xingyong Liu , Qian Zhou , Yan Luo
Abstract
The electro-Fenton (EF) is one of the most promising methods for dye wastewater treatment. However, developing efficient and stable catalysts is still a long-term goal in practical applications. Herein, a MnVOx EF cathode catalyst regulated by oxygen vacancy (Ov) was synthesized using a one-pot hydrothermal method, which demonstrated a high degradation rate (96.78 %) for the dye Rhodamine B (Rh B) within 2 h under acidic conditions, with excellent stability and applicability. Combined with the analysis of XRD, XPS, and TEM, the crystal structure and exposed crystal face of MnO2 were altered on account of introducing V. Moreover, the content of Ov and low-valent manganese (Mn2+/Mn3+) was increased significantly when the Mn/V ratio in precursor was 1:1. The increase of active sites for degrading Rh B promoted the formation and the production of reactive oxygen species (·OH, ·, and 1O2). And the electron transfer between V and Mn could also promote the production of reactive oxygen species. This work offers an insight for the design of Mn-based cathodic catalysts and their application for degradation of dye wastewater by EF.
{"title":"Oxygen vacancy-mediated MnVOx cathode via assisted of vanadium in heterogeneous electro-Fenton degradation of dye wastewater","authors":"Xiaocong Liu , Fuping Zhang , Yi Wang , Bo Xing , Guo Yang , Min Li , Xingyong Liu , Qian Zhou , Yan Luo","doi":"10.1016/j.jwpe.2025.107017","DOIUrl":"10.1016/j.jwpe.2025.107017","url":null,"abstract":"<div><div>Abstract</div><div>The electro-Fenton (EF) is one of the most promising methods for dye wastewater treatment. However, developing efficient and stable catalysts is still a long-term goal in practical applications. Herein, a MnVO<sub><em>x</em></sub> EF cathode catalyst regulated by oxygen vacancy (O<sub>v</sub>) was synthesized using a one-pot hydrothermal method, which demonstrated a high degradation rate (96.78 %) for the dye Rhodamine B (Rh B) within 2 h under acidic conditions, with excellent stability and applicability. Combined with the analysis of XRD, XPS, and TEM, the crystal structure and exposed crystal face of MnO<sub>2</sub> were altered on account of introducing V. Moreover, the content of O<sub>v</sub> and low-valent manganese (Mn<sup>2+</sup>/Mn<sup>3+</sup>) was increased significantly when the Mn/V ratio in precursor was 1:1. The increase of active sites for degrading Rh B promoted the formation and the production of reactive oxygen species (·OH, ·<span><math><msubsup><mi>O</mi><mn>2</mn><mo>−</mo></msubsup></math></span>, and <sup>1</sup>O<sub>2</sub>). And the electron transfer between V and Mn could also promote the production of reactive oxygen species. This work offers an insight for the design of Mn-based cathodic catalysts and their application for degradation of dye wastewater by EF.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 107017"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jwpe.2025.106987
Ganchen Zhou, Xiaoying Jin, Zuliang Chen
Ionic rare earth mining wastewater contains a certain amount of rare earth elements (REEs). Given the scarcity and great application potential of REEs, this study explored the potential of employing manganese nanoparticles (GT-Mn) derived from green tea to recover REEs from mining wastewater. The maximum adsorption efficiencies of GT-Mn on REEs were 98.50 % (Y), 94.85 % (La), 73.33 % (Gd), 75.00 % (Dy), and 81.25 % (Yb), respectively. Characterizations were conducted to elucidate the mechanism of GT-Mn in the recovery of REEs. The findings revealed that the adsorption capacity of GT-Mn for REEs is predominantly attributed to the presence of organic functional groups, including tyrosine and theanine, along with the interactions of MnO bonding interactions. Moreover, the zeta analysis supported the electrostatic interaction between GT-Mn and REEs. Thus, the key physicochemical properties of REEs removal by GT-Mn were statistically analyzed by Pearson's correlation analysis, indicating that the removal mechanism of REEs included complexation and electrostatic force. The desorption of REEs from GT-Mn in 0.01 M acetic acid (CH3COOH) solution showed that the desorption efficiency of REEs exceeded 75.00 %. Overall, GT-Mn demonstrates significant potential and advantages in the realm REEs recovery, which can achieve the dual benefits of environmental remediation and resource conservation.
{"title":"Biosynthesis of manganese nanoparticles for efficient recovery of rare earth elements from mining wastewater","authors":"Ganchen Zhou, Xiaoying Jin, Zuliang Chen","doi":"10.1016/j.jwpe.2025.106987","DOIUrl":"10.1016/j.jwpe.2025.106987","url":null,"abstract":"<div><div>Ionic rare earth mining wastewater contains a certain amount of rare earth elements (REEs). Given the scarcity and great application potential of REEs, this study explored the potential of employing manganese nanoparticles (GT-Mn) derived from green tea to recover REEs from mining wastewater. The maximum adsorption efficiencies of GT-Mn on REEs were 98.50 % (Y), 94.85 % (La), 73.33 % (Gd), 75.00 % (Dy), and 81.25 % (Yb), respectively. Characterizations were conducted to elucidate the mechanism of GT-Mn in the recovery of REEs. The findings revealed that the adsorption capacity of GT-Mn for REEs is predominantly attributed to the presence of organic functional groups, including tyrosine and theanine, along with the interactions of Mn<img>O bonding interactions. Moreover, the zeta analysis supported the electrostatic interaction between GT-Mn and REEs. Thus, the key physicochemical properties of REEs removal by GT-Mn were statistically analyzed by Pearson's correlation analysis, indicating that the removal mechanism of REEs included complexation and electrostatic force. The desorption of REEs from GT-Mn in 0.01 M acetic acid (CH<sub>3</sub>COOH) solution showed that the desorption efficiency of REEs exceeded 75.00 %. Overall, GT-Mn demonstrates significant potential and advantages in the realm REEs recovery, which can achieve the dual benefits of environmental remediation and resource conservation.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106987"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jwpe.2024.106908
Ankit Singh, Rajesh Roshan Dash
The impact of elevated OLR in conjunction with an anaerobic feeding strategy on the direct development of Aerobic granular sludge (AGS) for agro-based refractory rice mill wastewater is unexplored. This work utilized four identical sequencing batch reactors (SBRs) namely, R1, R2, R3, and R4 directly supplied with synthetically prepared lignin-rich rice mill wastewater, operating at varying OLR of 3, 6, 9, and 12 kg COD/m3·d, respectively to develop AGS. While granules in R1 and R2 achieved a stable average diameter of 1.23 ± 0.2 and 2.56 ± 0.1 mm, R3 and R4 could not meet the traditional AGS requirement due to excessive biomass development and loss of loose and fluffy filamentous granules. Higher EPS and PN/PS values led to compact and stable structures in OLR 3 and 6 kg COD/m3·d. Reactor performances were stable for R1 and R2. COD, lignin, TN, N, and TP removal were 90 ± 2, 80 ± 3, 63 ± 2, 70 ± 2, and 52 ± 3 %, respectively for R1 and 86 ± 1, 73 ± 2, 68 ± 2, 81 ± 3, and 71 ± 2 %, respectively for R2 were observed. For OLR 9 kg COD/m3·d, stable granules did not form due to low DO and lignin inhibition led to overall unsatisfactory performance of R3 and R4. This study contributed to a better understanding of AGS formation and treatment performance in terms of organic and nutrient removal under different OLR conditions in lignin rich rice mill wastewater.
{"title":"Effect of organic loading rates on granulation characteristics and performance for rice mill wastewater treatment","authors":"Ankit Singh, Rajesh Roshan Dash","doi":"10.1016/j.jwpe.2024.106908","DOIUrl":"10.1016/j.jwpe.2024.106908","url":null,"abstract":"<div><div>The impact of elevated OLR in conjunction with an anaerobic feeding strategy on the direct development of Aerobic granular sludge (AGS) for agro-based refractory rice mill wastewater is unexplored. This work utilized four identical sequencing batch reactors (SBRs) namely, R1, R2, R3, and R4 directly supplied with synthetically prepared lignin-rich rice mill wastewater, operating at varying OLR of 3, 6, 9, and 12 kg COD/m<sup>3</sup>·d, respectively to develop AGS. While granules in R1 and R2 achieved a stable average diameter of 1.23 ± 0.2 and 2.56 ± 0.1 mm, R3 and R4 could not meet the traditional AGS requirement due to excessive biomass development and loss of loose and fluffy filamentous granules. Higher EPS and PN/PS values led to compact and stable structures in OLR 3 and 6 kg COD/m<sup>3</sup>·d. Reactor performances were stable for R1 and R2. COD, lignin, TN, <span><math><msubsup><mi>NH</mi><mn>4</mn><mo>+</mo></msubsup></math></span><img>N, and TP removal were 90 ± 2, 80 ± 3, 63 ± 2, 70 ± 2, and 52 ± 3 %, respectively for R1 and 86 ± 1, 73 ± 2, 68 ± 2, 81 ± 3, and 71 ± 2 %, respectively for R2 were observed. For OLR <span><math><mo>≥</mo></math></span> 9 kg COD/m<sup>3</sup>·d, stable granules did not form due to low DO and lignin inhibition led to overall unsatisfactory performance of R3 and R4. This study contributed to a better understanding of AGS formation and treatment performance in terms of organic and nutrient removal under different OLR conditions in lignin rich rice mill wastewater.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106908"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jwpe.2024.106918
Yu Liang , Yili Ge , Kunkun Tian , Xiang Chen , Aiping Wu , Dabing Ge , Jiawei Zhang , Zhenrong Huang
In modern agriculture, fertilizers and pesticides not absorbed by crops contribute significant total nitrogen (TN) and total phosphorus (TP) to water bodies, leading to agricultural non-point source pollution (ANSP). This study presents a novel ecological ditch utilizing Vallisneria natans (V. natans) to purify TN and TP in farmland drainage while enhancing economic efficiency. Ecologically, the ecological ditch effectively intercepted TN and TP in the drainage water, achieving removal rates of 94.8–97.0 % for TN and 88.8–94.0 % for TP. Economically, the net profit and output/input ratio of the ecological ditch reached 3002.5 ± 340.7 RMB and 1.53 ± 0.18, respectively. Furthermore, the results indicated a negative correlation between the biomass of V. natans and the concentrations of TN (r = −0.51) and TP (r = −0.46) in water. The study also revealed significant negative correlations between the biomass of V. natans and the concentrations of TN (r = −0.70) and TP (r = −0.48) of sediments. Additionally, The biomass exhibited a positive correlation with both the DO (r = 0.86) concentration in the water and the organic matter content in the sediment (OM_S) (r = 0.95). These findings reflect the tendencies and transformation pathways of TN and TP within the ecological ditch. These findings highlight the potential of ecological ditches as effective tools for mitigating ANSP while providing economic benefits to agricultural systems.
{"title":"Study on the economic advantages of ecological ditch and the impact of removing nitrogen and phosphorus from paddy field drainage","authors":"Yu Liang , Yili Ge , Kunkun Tian , Xiang Chen , Aiping Wu , Dabing Ge , Jiawei Zhang , Zhenrong Huang","doi":"10.1016/j.jwpe.2024.106918","DOIUrl":"10.1016/j.jwpe.2024.106918","url":null,"abstract":"<div><div>In modern agriculture, fertilizers and pesticides not absorbed by crops contribute significant total nitrogen (TN) and total phosphorus (TP) to water bodies, leading to agricultural non-point source pollution (ANSP). This study presents a novel ecological ditch utilizing <em>Vallisneria natans</em> (<em>V. natans</em>) to purify TN and TP in farmland drainage while enhancing economic efficiency. Ecologically, the ecological ditch effectively intercepted TN and TP in the drainage water, achieving removal rates of 94.8–97.0 % for TN and 88.8–94.0 % for TP. Economically, the net profit and output/input ratio of the ecological ditch reached 3002.5 ± 340.7 RMB and 1.53 ± 0.18, respectively. Furthermore, the results indicated a negative correlation between the biomass of <em>V. natans</em> and the concentrations of TN (<em>r</em> = −0.51) and TP (<em>r</em> = −0.46) in water. The study also revealed significant negative correlations between the biomass of <em>V. natans</em> and the concentrations of TN (<em>r</em> = −0.70) and TP (<em>r</em> = −0.48) of sediments. Additionally, The biomass exhibited a positive correlation with both the DO (<em>r</em> = 0.86) concentration in the water and the organic matter content in the sediment (OM_S) (<em>r</em> = 0.95). These findings reflect the tendencies and transformation pathways of TN and TP within the ecological ditch. These findings highlight the potential of ecological ditches as effective tools for mitigating ANSP while providing economic benefits to agricultural systems.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106918"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jwpe.2025.106946
Manuel Botejara-Antúnez , Jaime González-Domínguez , Francisco Javier Rebollo-Castillo , Justo García-Sanz-Calcedo
Legionellosis is a disease caused by the Legionella pneumophila bacterium and that has great importance in the different water systems of a hospital's infrastructure. To prevent its appearance and spread, it is necessary for the health system to have preventive maintenance and disinfection equipment. This research evaluated the environmental impact of 5 disinfection systems of the Extremadura Health Service (Spain) broken down into 15 disinfection cases which covered two working scenarios and different types of fuel and chemical consumption. To this end, the different cases underwent a life cycle assessment, and a unique scoring damage category analysis was performed for the midpoint and endpoint stages using the ReCiPe 2016 method, the Ecoinvent 3.10 environmental database, the SimaPro 9.6 LCA software, and the “cradle to grave” perspective. The results show that disinfection using ultraviolet radiation gave the least favourable values in both working scenarios (6.28 pt./m3). In addition, it was determined that the chemical disinfection system through intensive chlorine hyperchlorination is the optimal solution when less than two outbreaks occur each year (1.13 pt./m3). For scenarios with more than two annual outbreaks (unusual situation), the copper‑silver ionization disinfection system is the most sustainable. The knowledge obtained made it possible to add a new dimension to the process of selecting treatment systems against Legionella in hospital water installations, guaranteeing their operability and the health and safety of users.
{"title":"Comparative life cycle analysis of Legionella treatment and prevention systems in healthcare buildings DHW facilities","authors":"Manuel Botejara-Antúnez , Jaime González-Domínguez , Francisco Javier Rebollo-Castillo , Justo García-Sanz-Calcedo","doi":"10.1016/j.jwpe.2025.106946","DOIUrl":"10.1016/j.jwpe.2025.106946","url":null,"abstract":"<div><div>Legionellosis is a disease caused by the <em>Legionella pneumophila</em> bacterium and that has great importance in the different water systems of a hospital's infrastructure. To prevent its appearance and spread, it is necessary for the health system to have preventive maintenance and disinfection equipment. This research evaluated the environmental impact of 5 disinfection systems of the Extremadura Health Service (Spain) broken down into 15 disinfection cases which covered two working scenarios and different types of fuel and chemical consumption. To this end, the different cases underwent a life cycle assessment, and a unique scoring damage category analysis was performed for the midpoint and endpoint stages using the ReCiPe 2016 method, the Ecoinvent 3.10 environmental database, the SimaPro 9.6 LCA software, and the “cradle to grave” perspective. The results show that disinfection using ultraviolet radiation gave the least favourable values in both working scenarios (6.28 pt./m<sup>3</sup>). In addition, it was determined that the chemical disinfection system through intensive chlorine hyperchlorination is the optimal solution when less than two outbreaks occur each year (1.13 pt./m<sup>3</sup>). For scenarios with more than two annual outbreaks (unusual situation), the copper‑silver ionization disinfection system is the most sustainable. The knowledge obtained made it possible to add a new dimension to the process of selecting treatment systems against Legionella in hospital water installations, guaranteeing their operability and the health and safety of users.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106946"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jwpe.2024.106913
Mohamed Kamel Elshaarawy
Accurate seepage loss estimation from lined canals is crucial for effective water management, especially in water-scarce regions. This study explores seepage loss prediction using advanced gradient boosting models optimized through Bayesian optimization (BO) and introduces a novel Stacked Multiple Linear Regression (SM-MLR) approach. Four hybrid base models were evaluated: Extreme Gradient Boosting (XGB), Light Gradient Boosting Machine (LGB), CatBoost Gradient Boosting (CGB), and Natural Gradient Boosting (NGB), alongside SM-MLR. A dataset of 600 records, using key canal and liner characteristics as inputs, was analyzed. Model performance was assessed using R2 and RMSE, with uncertainty evaluations and feature analysis through Partial Dependence Plots (PDPs) and SHapley Additive exPlanations (SHAP). Results showed that the SM-MLR model achieved the highest predictive accuracy, with an R2 of 0.998 and RMSE of 0.161 during testing, significantly outperforming all base models and setting a new benchmark for seepage loss prediction in lined canals. Among the base models, BO-CGB demonstrated strong and consistent performance, but it slightly lagged behind the SM-MLR model in terms of overall accuracy. SHAP and PDP analysis identified liner hydraulic conductivity (kL) as the most influential factor in seepage loss, followed by canal geometry and liner thickness. Further insights were gained from sensitivity analysis, which validated that optimizing kL is the most effective strategy for minimizing seepage. Thus, the potential of hybrid ensemble modeling was highlighted in significantly improving predictive accuracy, providing a robust and reliable tool for water resource management. The SM-MLR model, by outperforming previous best predictive models, offers actionable insights for real-world canal design, emphasizing the need to consider both hydraulic and geometric parameters to optimize canal performance and support water conservation efforts in water-scarce regions.
{"title":"Stacked-based hybrid gradient boosting models for estimating seepage from lined canals","authors":"Mohamed Kamel Elshaarawy","doi":"10.1016/j.jwpe.2024.106913","DOIUrl":"10.1016/j.jwpe.2024.106913","url":null,"abstract":"<div><div>Accurate seepage loss estimation from lined canals is crucial for effective water management, especially in water-scarce regions. This study explores seepage loss prediction using advanced gradient boosting models optimized through Bayesian optimization (BO) and introduces a novel Stacked Multiple Linear Regression (SM-MLR) approach. Four hybrid base models were evaluated: Extreme Gradient Boosting (XGB), Light Gradient Boosting Machine (LGB), CatBoost Gradient Boosting (CGB), and Natural Gradient Boosting (NGB), alongside SM-MLR. A dataset of 600 records, using key canal and liner characteristics as inputs, was analyzed. Model performance was assessed using R<sup>2</sup> and RMSE, with uncertainty evaluations and feature analysis through Partial Dependence Plots (PDPs) and SHapley Additive exPlanations (SHAP). Results showed that the SM-MLR model achieved the highest predictive accuracy, with an R<sup>2</sup> of 0.998 and RMSE of 0.161 during testing, significantly outperforming all base models and setting a new benchmark for seepage loss prediction in lined canals. Among the base models, BO-CGB demonstrated strong and consistent performance, but it slightly lagged behind the SM-MLR model in terms of overall accuracy. SHAP and PDP analysis identified liner hydraulic conductivity (<em>k</em><sub><em>L</em></sub>) as the most influential factor in seepage loss, followed by canal geometry and liner thickness. Further insights were gained from sensitivity analysis, which validated that optimizing <em>k</em><sub><em>L</em></sub> is the most effective strategy for minimizing seepage. Thus, the potential of hybrid ensemble modeling was highlighted in significantly improving predictive accuracy, providing a robust and reliable tool for water resource management. The SM-MLR model, by outperforming previous best predictive models, offers actionable insights for real-world canal design, emphasizing the need to consider both hydraulic and geometric parameters to optimize canal performance and support water conservation efforts in water-scarce regions.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106913"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jwpe.2024.106910
Mostafa Shoorangiz , Marjan Salari , Mohammad Reza Nikoo , Ali Haddadi
This study aims to evaluate the effectiveness of an electro-Fenton (EF) process using a sacrificial anode for the automatic supply of Fenton catalyst (Fe2+) and agent (H₂O₂) in the removal of Ciprofloxacin (CIP) antibiotic. The novelty of this research lies in the integration of Artificial Neural Networks (ANNs), specifically Multi-Layer Perceptron (ANN-MLP) and Radial Basis Function (ANN-RBF) models, to optimize and predict the responses of CIP removal rate, Chemical Oxygen Demand (COD) removal rate, and Electrical Energy Consumption (EEC). Performance metrics indicated that ANN-MLP provided superior accuracy compared to ANN-RBF and Response Surface Methodology with Central Composite Design (RSM-CCD). Sensitivity analysis highlighted the significant influence of initial pH and current intensity on CIP removal efficiency, while COD removal and EEC were notably affected by initial pH, operation time, and current intensity. Using Genetic Algorithm (GA) and Non-dominated Sorting Genetic Algorithm-II (NSGA-II) for optimization, then achieved simultaneous maximization of CIP and COD removal efficiencies alongside minimization of EEC. The optimal parameters, including a current intensity of 38.01/14.15 mA, operation time of 25/24.94 min, and initial pH of 4.81/5.20 for GA/NSGA-II, lead to average CIP and COD removal efficiencies of 91.33/76.97 % and 51.53/42.51 %, respectively, with an estimated EEC of 134.20/41.04 J under these operating conditions.
{"title":"Advanced modeling techniques in electro-Fenton process optimization: Insights from artificial intelligence and statistical methods","authors":"Mostafa Shoorangiz , Marjan Salari , Mohammad Reza Nikoo , Ali Haddadi","doi":"10.1016/j.jwpe.2024.106910","DOIUrl":"10.1016/j.jwpe.2024.106910","url":null,"abstract":"<div><div>This study aims to evaluate the effectiveness of an electro-Fenton (EF) process using a sacrificial anode for the automatic supply of Fenton catalyst (Fe<sup>2+</sup>) and agent (H₂O₂) in the removal of Ciprofloxacin (CIP) antibiotic. The novelty of this research lies in the integration of Artificial Neural Networks (ANNs), specifically Multi-Layer Perceptron (ANN-MLP) and Radial Basis Function (ANN-RBF) models, to optimize and predict the responses of CIP removal rate, Chemical Oxygen Demand (COD) removal rate, and Electrical Energy Consumption (EEC). Performance metrics indicated that ANN-MLP provided superior accuracy compared to ANN-RBF and Response Surface Methodology with Central Composite Design (RSM-CCD). Sensitivity analysis highlighted the significant influence of initial pH and current intensity on CIP removal efficiency, while COD removal and EEC were notably affected by initial pH, operation time, and current intensity. Using Genetic Algorithm (GA) and Non-dominated Sorting Genetic Algorithm-II (NSGA-II) for optimization, then achieved simultaneous maximization of CIP and COD removal efficiencies alongside minimization of EEC. The optimal parameters, including a current intensity of 38.01/14.15 mA, operation time of 25/24.94 min, and initial pH of 4.81/5.20 for GA/NSGA-II, lead to average CIP and COD removal efficiencies of 91.33/76.97 % and 51.53/42.51 %, respectively, with an estimated EEC of 134.20/41.04 J under these operating conditions.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106910"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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