Environmental Technology最新文献

Rapid detection of sludge moisture content based on the frequency domain reflection. 基于频域反射的污泥含水率快速检测。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI: 10.1080/09593330.2024.2440657

Yan Zhang, Yawen Yao, Shuying Yu, Minrui Huang, Xilong Lu, Jiadi Lian, Peng Xu, Binqi Rao

{"title":"Rapid detection of sludge moisture content based on the frequency domain reflection.","authors":"Yan Zhang, Yawen Yao, Shuying Yu, Minrui Huang, Xilong Lu, Jiadi Lian, Peng Xu, Binqi Rao","doi":"10.1080/09593330.2024.2440657","DOIUrl":"10.1080/09593330.2024.2440657","url":null,"abstract":"The moisture content (MC) of sludge is a critical factor affecting sludge treatment and disposal technologies. Traditional drying methods for measuring sludge MC are time-consuming and lack of portability. To achieve rapid online detection of sludge MC, this paper proposes a method based on frequency domain reflectometry. The theoretical feasibility of detecting MC using the frequency reflection principle was demonstrated. The model of the relationship between MC and dielectric constant, as well as the relationship between dielectric constant and oscillation frequency, was derived. The mathematical model correlating MC of sludge with oscillation frequency was established, and the structure of the sensor probe was designed. Experimental results show that the third-degree fitting curve achieving the best <math><msubsup><mi>R</mi><mi>t</mi><mn>2</mn></msubsup></math> of 0.98247. The proposed method presents good measurement performance compared to the drying method, with satisfactory repeatability and consistency in performance tests. For the sludge samples with MC ranging from 10% to 75%, the maximum error is 3.4%, and the average absolute error is 1.86%. This method provides an effective way for rapid detection of sludge MC, offering shorter measurement times and better portability compared to traditional methods.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2615-2628"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal uptake in wetland plants from oil sands process-affected waters: a case study. 湿地植物对油砂过程影响水体中金属的吸收：一个案例研究。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI: 10.1080/09593330.2024.2443600

Alexander M Cancelli, Asfaw Bekele, Andrea K Borkenhagen

{"title":"Metal uptake in wetland plants from oil sands process-affected waters: a case study.","authors":"Alexander M Cancelli, Asfaw Bekele, Andrea K Borkenhagen","doi":"10.1080/09593330.2024.2443600","DOIUrl":"10.1080/09593330.2024.2443600","url":null,"abstract":"Treatment wetlands have emerged as a potential remediation option for oil-sands process affected waters (OSPW) which contains a suite of organic and inorganic constituents of potential concern. The aim of this study was to evaluate the fate of metals in a treatment wetland exposed to OSPW. Data was collected over three operational seasons testing freshwater and OSPW inputs at the Kearl Treatment Wetland in northern Alberta. Overall, results show that OSPW from the Kearl oil sands mine has relatively low concentrations of metals and trace elements compared to other industrial OSPW. Of the inorganic constituents introduced into the wetland from OSPW, six analytes (As, Ba, Cu, Mo, Ni, and U) were found to depurate by wetland treatment, were distributed among wetland media (water, sediment, plants), and translocated into water sedge and cattail tissue. Depuration of these analytes from the OSPW occurred mainly through sorption to sediment, while Mo and Cu had higher uptake and storage within plant tissue compared to the other analytes. No significant differences in metal uptake were observed between cattails and water sedge; root concentrations were higher than leaf concentrations. Root and leaf concentration factors were similar across years indicating that mechanisms of plant uptake were not impacted by exposure to OSPW and that bioconcentration was mainly a function of exposure. These findings support continued investigation into the application of treatment wetlands for OSPW remediation and underscore the need for further studies to optimize these systems for diverse OSPW types.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2681-2695"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal of sulfamethoxazole by Fe(III)-activated peracetic acid combined with ascorbic acid. 铁（III）活化过氧乙酸与抗坏血酸联合去除磺胺甲恶唑。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI: 10.1080/09593330.2024.2442779

Yiqing Liu, Linghan Xu, Xin Li, Shixiang Wang

{"title":"Removal of sulfamethoxazole by Fe(III)-activated peracetic acid combined with ascorbic acid.","authors":"Yiqing Liu, Linghan Xu, Xin Li, Shixiang Wang","doi":"10.1080/09593330.2024.2442779","DOIUrl":"10.1080/09593330.2024.2442779","url":null,"abstract":"Ascorbic acid (AA) was used as a reducing agent to improve the Fe(III)-activated peracetic acid (PAA) system for the removal of sulfamethoxazole (SMX) in this work. The efficiency, influencing factors and mechanism of SMX elimination in the AA/Fe(III)/PAA process were studied. The results exhibited that AA facilitated the reduction of Fe(III) to Fe(II) and subsequently improved the activation of PAA and H2O2. Various radicals, including organic radicals (e.g. CH3C(O)O• and CH3C(O)OO•) and hydroxyl radical (HO•), were rapidly formed from the activated PAA and H2O2, resulting in SMX removal. Increasing dosages of PAA and Fe(III) contributed to enhanced SMX degradation, while excessive PAA and Fe(III) did not further promote SMX degradation. Due to the radicals' quenching effect, excess AA hindered SMX elimination in the AA/Fe(III)/PAA process. The presence of <math><msubsup><mrow><mi>HCO</mi></mrow><mn>3</mn><mo>-</mo></msubsup></math> and Cl- inhibited SMX removal in this system, whereas <math><msubsup><mrow><mi>NO</mi></mrow><mn>3</mn><mo>-</mo></msubsup></math>, <math><msubsup><mrow><mi>SO</mi></mrow><mn>4</mn><mrow><mn>2</mn><mo>-</mo></mrow></msubsup></math> and natural organic matter had little impact on SMX degradation. The transformation pathways of SMX in the AA/Fe(III)/PAA system included hydroxylation, bond cleavage and amino oxidation. This research provides a strategy to enhance the Fe(III)-activated PAA system for the elimination of refractory organic pollutants.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2670-2680"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The speciation and thermal transformation characteristics of fluorine and chlorine in industrial wastes. 工业废渣中氟、氯的形态及热转化特征。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2025-01-20 DOI: 10.1080/09593330.2024.2445326

Peng-Tao Cai, Tong Chen, Bei Chen, Yu-Chun Wang, Xiao-Jun Ma, Zeng-Yi Ma, Jian-Hua Yan

{"title":"The speciation and thermal transformation characteristics of fluorine and chlorine in industrial wastes.","authors":"Peng-Tao Cai, Tong Chen, Bei Chen, Yu-Chun Wang, Xiao-Jun Ma, Zeng-Yi Ma, Jian-Hua Yan","doi":"10.1080/09593330.2024.2445326","DOIUrl":"10.1080/09593330.2024.2445326","url":null,"abstract":"The study investigated the chlorine and fluorine contents in three types of industrial solid waste: textile, plastic, and paper waste, utilizing various analytical methods. Significant variations in the proportions of organic and inorganic chlorine were observed among the waste types. During heat treatment, the majority of chlorine converts to a volatile state, with fixed chlorine content showing a correlation with organic chlorine. Organic fluorine predominated in all waste types, predominantly transitioning to a volatile state during heat treatment. Notably, textile waste exhibited unique behaviour, potentially converting some organic fluorine into a fixed state due to flame retardant additives. Analysis of flue gas during practical co-incineration of industrial solid waste revealed a substantial increase in chloride concentration, accompanied by the presence of organic chlorides such as chlorobenzene, methane chloride, and ethane chloride. These findings underscore the importance of implementing preventive measures against chlorine and fluorine emissions during industrial waste co-incineration.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2719-2728"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143002632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption behaviour and mechanism of natural citric acid modified MOF-808 for Cr(III) and Cr(III)-EDTA in water and site energy analysis. 天然柠檬酸改性MOF-808对水中Cr（III）和Cr(III)-EDTA的吸附行为、机理及现场能分析

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI: 10.1080/09593330.2024.2438890

Hao Zhang, Jiahong Wang, Peiling Han, Zhi Hu

{"title":"Adsorption behaviour and mechanism of natural citric acid modified MOF-808 for Cr(III) and Cr(III)-EDTA in water and site energy analysis.","authors":"Hao Zhang, Jiahong Wang, Peiling Han, Zhi Hu","doi":"10.1080/09593330.2024.2438890","DOIUrl":"10.1080/09593330.2024.2438890","url":null,"abstract":"Industrial wastewater often contains potentially toxic metals and it's chelates, posing serious threats to human health and aquatic ecosystems, and adsorption is frequently used for the minimization of potentially toxic metals from water. In this study, citric acid modified MOF-808 (MOF-808-CA) was prepared by using citric acid to modify MOF-808 for the removal of Cr(III) and Cr(III)-EDTA from wastewater. MOF-808-CA with the BET surface area of 653.59 m2 g-1 and the pore volumes of 0.467 cm3 g-1 was successfully synthesized. The adsorption of Cr(III) and Cr(III)-EDTA by MOF-808-CA was 40.46 and 17.03 mg g-1 at pH 4.0 and 25°C, respectively. The adsorption isotherms and adsorption kinetics of Cr(III) and Cr(III)-EDTA were summarized using Langmuir-Freundlich isothermal adsorption model and the pseudo-second-order model. Even in high salinity wastewater (35,000 mg L-1), MOF-808-CA displayed a strong affinity for Cr(III) and Cr(III)-EDTA. The site energy (E*) values reduced with the increasing of adsorption capacities, and Cr(III) and Cr(III)-EDTA firstly dominated the high-energy adsorption sites before low-energy adsorption sites. The average site energies for the adsorption of Cr(III) and Cr(III)-EDTA by MOF-808-CA were 26.7 and 24 kJ mol-1, respectively, and the differences in the average site energies further illustrated the essential differences in their adsorption mechanisms. The adsorption by electrostatic adsorption and surface complexation were the main adsorption mechanisms for Cr(III) on MOF-808-CA, whereas hydrogen bonding and complexation were the main adsorption mechanisms for Cr(III)-EDTA on MOF-808-CA. The results showed that the MOF-808-CA adsorbent has a great potential for the removal of both Cr(III) and Cr(III)-EDTA from aqueous solutions.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2509-2520"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanistic study of micropollutants rejection by nanofiltration of a natural water. 天然水体纳滤去除微污染物的机理研究。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-31 DOI: 10.1080/09593330.2024.2439137

Penglin Fan, Lydie Paugam, Pierre-François Biard, Anthony Szymczyk

{"title":"Mechanistic study of micropollutants rejection by nanofiltration of a natural water.","authors":"Penglin Fan, Lydie Paugam, Pierre-François Biard, Anthony Szymczyk","doi":"10.1080/09593330.2024.2439137","DOIUrl":"10.1080/09593330.2024.2439137","url":null,"abstract":"A natural water sampled after a sand filtration step and spiked with four organic micropollutants (metolachlor ESA, metolachlor NOA, desethylatrazine and metaldehyde) was treated by a loose nanofiltration membrane. The Steric, Electric, and Dielectric model (SEDE model) was then used to predict the separation performance of the membrane towards the various ions and micropollutants in the water matrix in order to study the transport mechanism of ions and micropollutants through the membrane. The SEDE model was found to satisfactorily predict the rejection sequences of inorganic anions and cations, as well as neutral (desethylatrazine and metaldehyde) and charged (metolachlor ESA and metolachlor NOA) micropollutants. The dielectric exclusion mechanism was found to be negligible, most likely due to the loose structure of the membrane. The complex behaviour of cations (counterions) was explained by the interplay between the Donnan exclusion, electromigration and steric hindrance effects. The model was found to overestimate the rejection of charged micropollutants, such as metolachlor NOA and metolachlor ESA. It was suggested that it may be attributed to the adsorption of micropollutants on some weakly rejected fractions of natural organic matter (NOM) such as humic substances, which was supported by higher rejection rates observed in a model solution replicating the ionic composition of the natural water matrix but lacking NOM.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2558-2569"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leveraging oyster shell and zero-valent iron to eliminate excessive acidification and enhance methane production from readily acidified substrates. 利用牡蛎壳和零价铁消除过度酸化，提高易酸化底物的甲烷产量。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-24 DOI: 10.1080/09593330.2024.2442778

Xiaofan Ding, Wei Jiang, Fangyuan Feng, Yanfei Li, Yanzhen Yu, Chunhui Zhao, Hui Mu

{"title":"Leveraging oyster shell and zero-valent iron to eliminate excessive acidification and enhance methane production from readily acidified substrates.","authors":"Xiaofan Ding, Wei Jiang, Fangyuan Feng, Yanfei Li, Yanzhen Yu, Chunhui Zhao, Hui Mu","doi":"10.1080/09593330.2024.2442778","DOIUrl":"10.1080/09593330.2024.2442778","url":null,"abstract":"Anaerobic digestion is a sustainable technology for methane (CH4) production from organic waste and wastewater. However, its performance is frequently hindered by excessive acidification in readily acidified substrates, such as starch wastewater. Oyster shell (OS), a natural alkaline material, effectively regulates pH and enhances CH4 production. Nevertheless, its use increases CO2 levels in biogas, highlighting the need for in-situ conversion of CO2 into CH4. This study presents a novel approach by combining OS with zero-valent iron (ZVI), which acts as an indirect hydrogen (H2) source, to facilitate this conversion and boost methanogenesis from readily acidified substrates. Results demonstrated a 22.8% reduction in CO2 levels and a significant increase in CH4 yield to 364 mL/g-COD, surpassing both previously reported values and the theoretical maximum of 350 mL/g-COD. Additionally, the daily CH4 production rate was increased by 60.3%, with a shorter lag phase and overall duration. This improvement was driven by the synergy between OS and ZVI, which enhanced hydrogen ion consumption, releasing additional CO2 and H2 for methanogenesis. The synergistic interaction also promoted extracellular polymeric substances levels, acidogenic and methanogenic steps, key enzyme activities, and enrichments of Methanothrix, hydrogenotrophic methanogens, and Longilinea. Furthermore, an economic assessment revealed significant cost benefits of this approach, offering promising potential for industrial applications. This study provides new insights into leveraging OS and ZVI to eliminate excessive acidification and improve CH4 production from readily acidified substrates.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2656-2669"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of sludge biochar at different carbonization temperatures on anammox process. 不同炭化温度下污泥生物炭对厌氧氨氧化过程的影响。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-12 DOI: 10.1080/09593330.2024.2438893

Maolin Wu, Cheng Yao, Zhengxiang Wang, Yongqi Xiong, Xiaoling Zhang, Aixia Chen, Wenjuan Yang

{"title":"Influence of sludge biochar at different carbonization temperatures on anammox process.","authors":"Maolin Wu, Cheng Yao, Zhengxiang Wang, Yongqi Xiong, Xiaoling Zhang, Aixia Chen, Wenjuan Yang","doi":"10.1080/09593330.2024.2438893","DOIUrl":"10.1080/09593330.2024.2438893","url":null,"abstract":"Adding biochar can expedite the establishment of the anaerobic ammonia oxidation (anammox) process and improve the nitrogen removal efficiency of the anammox reactor. However, the optimization research of biochar derived from dewatered sludge on anammox is relatively limited. In this study, four sequencing batch reactors (SBRs) were compared for the enrichment of anammox bacteria using synthetic wastewater with sludge biochar carbonized at temperatures of 300°C, 550°C, and 800°C, and without biochar (CK). The start-up and the nitrogen removal performance of anammox process were evaluated, as well as the effect of organic carbon on nitrogen removal. The results showed that the addition of sludge biochar at different pyrolysis temperatures all can accelerate the start-up of the anammox process, improve the nitrogen removal efficiency, and reduce the total nitrogen (TN) in the effluent. Although the reactor with biochar carbonized at 800°C showed the fastest increase in the nitrogen loading, the best TNRE occurred in the reactor with biochar carbonized at 300°C, which was 8.0% higher than those of the control (CK, p < 0.05). The predominant genus of anammox in SBRs differed between the sludge biochar reactor and the control reactor (without biochar), which were Candidatus Brocadia and Candidatus Jettenia, respectively. Additionally, the total abundances of anammox bacteria and denitrifiers increased with the addition of sludge biochar.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2521-2535"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142817494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recovery of protein from tofu whey wastewater using protein-based coagulant. 蛋白基混凝剂回收豆腐乳清废水中的蛋白质。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-15 DOI: 10.1080/09593330.2024.2439067

Widyarani, Gina Nur Annisa, Dhini Annisa Rahmasari Kanto, Atti Sholihah, Sambas, Yessie Widya Sari, Dani Permana

{"title":"Recovery of protein from tofu whey wastewater using protein-based coagulant.","authors":"Widyarani, Gina Nur Annisa, Dhini Annisa Rahmasari Kanto, Atti Sholihah, Sambas, Yessie Widya Sari, Dani Permana","doi":"10.1080/09593330.2024.2439067","DOIUrl":"10.1080/09593330.2024.2439067","url":null,"abstract":"Tofu whey wastewater is the protein-rich liquid by-product of tofu production that has the potential as a source stream for biobased products. Coagulation can be used to recover protein from tofu whey. Biobased coagulants are alternatives for polymer- and metal-based coagulants, particularly if the precipitate is recovered and used for further processes. The tofu whey coagulation performance of three protein-based coagulants, namely soy protein isolate, Moringa oleifera seed, and isolate of Moringa seed protein, was determined with the jar test method. The pH (4, 5, 7, 9) and protein dosage (33-191 mg-protein/L) were varied. The results were compared with chitosan, as a benchmark for biobased coagulants, with similar pH variation and 100-800 mg-chitosan/L dosage variation. Our experiment showed that the optimum pH for protein coagulation was 4 (the initial pH of the tofu whey). Up to 95% turbidity could be removed, with chitosan shown to be the most effective coagulant. On the other hand, chitosan only removed up to 9% of organics as chemical oxygen demand (COD), while soy protein isolate could remove up to 20%. The highest protein removal was obtained by soy protein isolate (35%) followed by Moringa seed (34%), chitosan (25%), and Moringa seed protein (13%). Meanwhile, coagulation with soy protein isolate could recover 11% protein in the precipitate at 60% protein content. Higher protein removal compared to COD suggests a preference towards protein coagulation compared with other organics. Our results suggest that protein-based materials can be applied to recover proteins from tofu whey.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2546-2557"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142827940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of plant-based coagulants for turbidity removal and coagulant dosage prediction using machine learning. 植物基混凝剂去除浊度的评价和使用机器学习的混凝剂用量预测。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-06-01 Epub Date: 2024-12-11 DOI: 10.1080/09593330.2024.2439183

Poloko Ivy Namane, Moatlhodi Wise Letshwenyo, Abid Yahya

{"title":"Evaluation of plant-based coagulants for turbidity removal and coagulant dosage prediction using machine learning.","authors":"Poloko Ivy Namane, Moatlhodi Wise Letshwenyo, Abid Yahya","doi":"10.1080/09593330.2024.2439183","DOIUrl":"10.1080/09593330.2024.2439183","url":null,"abstract":"This study investigates the use of six plant-based coagulants - Acacia erioloba, Ricinodendron rautanenii, Schinziophyton rautanenii, Peltophorum africanum, Delonix regia, and Maerua angolensis for the removal of turbidity from wastewater effluent. The coagulants were characterized using Scanning Electron Microscopy (SEM) to determine morphological structure, X-ray fluorescence (XRF) to assess chemical composition, and X-ray diffraction to analyse the molecular structure. The coagulation process was evaluated using jar tests with varying coagulant dosages and pH levels. SEM images revealed irregular, rough surfaces, with all materials being amorphous and non-crystalline. Significant levels of essential elements, including iron (Fe), calcium (Ca), sulphur (S), and potassium (K) were revealed. Turbidity removal efficiency fluctuated with pH, showing optimal results under alkaline conditions. Notably, strong negative correlations between pH and turbidity were observed for all coagulants except Peltophorum africanum at a dosage of 20 g/L. Doubling the coagulant volume achieved turbidity reductions between 59% and 92.24%, except for Acacia erioloba and Ricinodendron rautanenii at a dosage of 40 g/L, which showed increased turbidity. The study also employed machine learning techniques to analyse the data and predict the most effective coagulant dosage under different pH conditions. These findings suggest that plant-based coagulants could be viable alternatives to chemical coagulants, with machine learning providing accurate predictions of coagulation performance. Further research is recommended to explore the capabilities of these natural coagulants fully.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2570-2585"},"PeriodicalIF":2.2,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142812551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0