In this study, composite repair material was obtained by composting and fermentation of straw biochar and sludge according to the mass ratio of 1:4. The remediation effect of its composite remediation materials on heavy metals copper (Cu) and lead (Pb) in soil was investigated. The characterization results of the composite remediation material showed that the material had rich pore structure, high specific surface area and rich functional groups such as hydroxyl, carbonyl and carboxyl groups, and had high adsorption capacity for heavy metals in contaminated soil. The passivation effect of Cu and Pb in contaminated soil was investigated under different application amount (3%, 5%) and passivation time (15d, 60d). The changes of Cu and Pb content, availability and morphology distribution in the soil before and after the addition of remediation materials were analyzed. The results showed that the passivation effect of Cu and Pb in soil was significantly enhanced with increasing passivation time and application amount. In conclusion, the addition of remediation materials effectively reduced the content and effectiveness of heavy metals in the soil and promoted the change of Cu and Pb morphology in the heavy metal-contaminated soil, thus realizing the remediation of the heavy metal-contaminated soil.
{"title":"Study on the effects of new developed biochar and sludge composite materials on copper and lead contaminated soil and its remediation mechanism","authors":"Xiao Wang, Qing Guo, Xiaoyan Wang, Yong Jia, Wanke Chen, Qianfeng Zhang, Jing Yuan","doi":"10.1016/j.eti.2023.103429","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103429","url":null,"abstract":"In this study, composite repair material was obtained by composting and fermentation of straw biochar and sludge according to the mass ratio of 1:4. The remediation effect of its composite remediation materials on heavy metals copper (Cu) and lead (Pb) in soil was investigated. The characterization results of the composite remediation material showed that the material had rich pore structure, high specific surface area and rich functional groups such as hydroxyl, carbonyl and carboxyl groups, and had high adsorption capacity for heavy metals in contaminated soil. The passivation effect of Cu and Pb in contaminated soil was investigated under different application amount (3%, 5%) and passivation time (15d, 60d). The changes of Cu and Pb content, availability and morphology distribution in the soil before and after the addition of remediation materials were analyzed. The results showed that the passivation effect of Cu and Pb in soil was significantly enhanced with increasing passivation time and application amount. In conclusion, the addition of remediation materials effectively reduced the content and effectiveness of heavy metals in the soil and promoted the change of Cu and Pb morphology in the heavy metal-contaminated soil, thus realizing the remediation of the heavy metal-contaminated soil.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"27 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135455804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103436
Behnam Askari Lasaki, Peter Maurer, Harald Schönberger, Emilia Palomeque Alvarez
The present study aimed to determine the physical and chemical parameters in the primary treatment process of municipal wastewater by flocculation processes using natural and synthetic polymers as chemically advanced primary treatment (CAPT). Flocculants like chitosan-based, starch-based, and polyacrylamide were chosen, and their feasibility for preliminary treated (PSTin) and pre-treated WASTEWATER (PSTout) underwent precise investigations applying the batch test setup. Since TSS concentration varies hourly in wastewater treatment plants (WWTP) and significantly affects the required dosage of the flocculants, various samples with TSS concentrations ranging from extremely low (<100 mg L-1) to incredibly high (> 700 mg L-1) were gathered to account for all TSS ranges. Several tests were then performed on the samples to establish the efficacy, optimum dosage, settleability, and filterability of the flocs generated by the polymers. The flocs' morphological characteristics were also analyzed by two-dimensional image analysis (2D-IA). The results showed that PSTin or PSTout can be purified solely with synthetic and environmentally confirmed natural-based polymers readily and efficiently. This concept introduces one-stage flocculation for the primary treatment of municipal wastewater rather than the conventional two stages of coagulation-flocculation, which has been used so far while applying harmful aluminum or ferric salts. The results also revealed that the CAPT system can be enhanced by coupling with a microstrain (MS) to remove nearly all particulate organic carbon in the form of COD or TSS. Exploring a range of biological treatment options in conjunction with the CAPT system revealed a significant reduction in external energy reliance for municipal WWTPs, transferring from roughly 75% to complete independence. This evolution also enables the efficient production of valuable byproducts such as Hydrogen, Polyhydroxyalkanoates, and Ammonium chloride fertilizers, ultimately empowering municipal WWTPs from energy-dependent facilities into self-sustaining energy sources.
{"title":"Empowering Municipal Wastewater Treatment: Enhancing Particulate Organic Carbon Removal via Chemical Advanced Primary Treatment","authors":"Behnam Askari Lasaki, Peter Maurer, Harald Schönberger, Emilia Palomeque Alvarez","doi":"10.1016/j.eti.2023.103436","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103436","url":null,"abstract":"The present study aimed to determine the physical and chemical parameters in the primary treatment process of municipal wastewater by flocculation processes using natural and synthetic polymers as chemically advanced primary treatment (CAPT). Flocculants like chitosan-based, starch-based, and polyacrylamide were chosen, and their feasibility for preliminary treated (PSTin) and pre-treated WASTEWATER (PSTout) underwent precise investigations applying the batch test setup. Since TSS concentration varies hourly in wastewater treatment plants (WWTP) and significantly affects the required dosage of the flocculants, various samples with TSS concentrations ranging from extremely low (<100 mg L-1) to incredibly high (> 700 mg L-1) were gathered to account for all TSS ranges. Several tests were then performed on the samples to establish the efficacy, optimum dosage, settleability, and filterability of the flocs generated by the polymers. The flocs' morphological characteristics were also analyzed by two-dimensional image analysis (2D-IA). The results showed that PSTin or PSTout can be purified solely with synthetic and environmentally confirmed natural-based polymers readily and efficiently. This concept introduces one-stage flocculation for the primary treatment of municipal wastewater rather than the conventional two stages of coagulation-flocculation, which has been used so far while applying harmful aluminum or ferric salts. The results also revealed that the CAPT system can be enhanced by coupling with a microstrain (MS) to remove nearly all particulate organic carbon in the form of COD or TSS. Exploring a range of biological treatment options in conjunction with the CAPT system revealed a significant reduction in external energy reliance for municipal WWTPs, transferring from roughly 75% to complete independence. This evolution also enables the efficient production of valuable byproducts such as Hydrogen, Polyhydroxyalkanoates, and Ammonium chloride fertilizers, ultimately empowering municipal WWTPs from energy-dependent facilities into self-sustaining energy sources.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135515055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103380
Zhong-Fei Xue, Wen-Chieh Cheng, Lin Wang, Yi-Xin Xie, Peng Qin
Microbially induced carbonate precipitation (MICP) is increasingly being explored for Pb-contaminated water bodies and soil remediation. However, the Pb-related precipitate resulting from the MICP process can possibly leach acid over time when subjected to harsh environments, causing serious threats to human health. In this study, for the first time, self-healing microbial-induced calcium carbonate (MICC) materials are proposed and applied to prevent Pb2+ migration where the Pb-related precipitate is acid leached after spore germination, spore-vegetative cell transformation, urease secretion, and urea hydrolysis, thereby producing spore-containing precipitation. This process was repeated five times to explore the effect of a harsh circular environment on self-healing MICC materials. Results indicated that Pb immobilization would have deteriorated if the inosine and trace elements had not been intervened during spore germination and spore-vegetative cell transformation, respectively. The spores and vegetative cells provided extra nucleation sites for Pb2+ and minerals to attach. The extracellular polymeric substances (EPSs) combined Pb2+ with functional groups and chemical bonds to prevent their migration to surrounding environments. The scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM–EDS) images also indicated that the cerussite mineral was precipitated prior to the calcite mineral because Pb2+ had more affinity to combine with CO32- and OH-. An immobilization efficiency of greater than 95% remained nearly the same after five cycles, while it reduced very quickly to less than 10% after three cycles when neglecting the self-healing MICC materials, thus highlighting their relative merits.
{"title":"Effect of a harsh circular environment on self-healing microbial-induced calcium carbonate materials for preventing Pb2+ migration","authors":"Zhong-Fei Xue, Wen-Chieh Cheng, Lin Wang, Yi-Xin Xie, Peng Qin","doi":"10.1016/j.eti.2023.103380","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103380","url":null,"abstract":"Microbially induced carbonate precipitation (MICP) is increasingly being explored for Pb-contaminated water bodies and soil remediation. However, the Pb-related precipitate resulting from the MICP process can possibly leach acid over time when subjected to harsh environments, causing serious threats to human health. In this study, for the first time, self-healing microbial-induced calcium carbonate (MICC) materials are proposed and applied to prevent Pb2+ migration where the Pb-related precipitate is acid leached after spore germination, spore-vegetative cell transformation, urease secretion, and urea hydrolysis, thereby producing spore-containing precipitation. This process was repeated five times to explore the effect of a harsh circular environment on self-healing MICC materials. Results indicated that Pb immobilization would have deteriorated if the inosine and trace elements had not been intervened during spore germination and spore-vegetative cell transformation, respectively. The spores and vegetative cells provided extra nucleation sites for Pb2+ and minerals to attach. The extracellular polymeric substances (EPSs) combined Pb2+ with functional groups and chemical bonds to prevent their migration to surrounding environments. The scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM–EDS) images also indicated that the cerussite mineral was precipitated prior to the calcite mineral because Pb2+ had more affinity to combine with CO32- and OH-. An immobilization efficiency of greater than 95% remained nearly the same after five cycles, while it reduced very quickly to less than 10% after three cycles when neglecting the self-healing MICC materials, thus highlighting their relative merits.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"689 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136018607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103364
Govindasamy Palanisamy, Jin-Hyung Lee, Jintae Lee
The resistance of staphylococcus aureus and Acinetobacter baumannii to antimicrobial agents results in chronic infections, making removing contaminants from wastewater essential for environmental remediation. Removing hazardous pollutants from wastewater and inhibiting biofilm formation is important for environmental remediation. This study effectively built biocompatible curcumin-loaded hydroxyapatite nanoparticles (Cur-HAp NPs) using a simple in-situ precipitation technique. Various analytical characterization techniques were used to evaluate the structural, morphological, and chemical composition of the synthesized NPs. Combining a highly bioactive natural curcumin pigment with hydroxyapatite NPs could maintain its pharmacological activity and exhibit a sustained release profile of curcumin. The antibiofilm activities against single and mixed dual species of S. aureus and A. baumannii were evaluated using crystal violet staining techniques. Excellent antibiofilm activities were demonstrated by Cur-HAp NPs against S. aureus, A. baumannii, and mixed dual species, with respective efficiency percentages of 76.7, 85.6, and 68.8 % inhibition upon treatment, respectively. In addition, Cur-HAp NPs demonstrated excellent dye adsorption against Congo red dye by approximately 95.6 %. Cur-HAp could absorb up to 112.4 mg/g of dye at a time. Negative ΔG value (−1.372 kJmol−1) indicates the spontaneous and feasible dye absorption onto Cur-HAp. The Langmuir adsorption isotherm and pseudo-second-order equation provided the best fit for the Cur-HAp NPs. Therefore, the sustained drug release behavior of Cur-HAp NPs is a promising candidate for combatting antibiofilm activity and dye removal capacity.
{"title":"Curcumin-loaded hydroxyapatite nanoparticles for enriched removal of organic pollutants and inhibition of dual-species biofilm formation","authors":"Govindasamy Palanisamy, Jin-Hyung Lee, Jintae Lee","doi":"10.1016/j.eti.2023.103364","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103364","url":null,"abstract":"The resistance of staphylococcus aureus and Acinetobacter baumannii to antimicrobial agents results in chronic infections, making removing contaminants from wastewater essential for environmental remediation. Removing hazardous pollutants from wastewater and inhibiting biofilm formation is important for environmental remediation. This study effectively built biocompatible curcumin-loaded hydroxyapatite nanoparticles (Cur-HAp NPs) using a simple in-situ precipitation technique. Various analytical characterization techniques were used to evaluate the structural, morphological, and chemical composition of the synthesized NPs. Combining a highly bioactive natural curcumin pigment with hydroxyapatite NPs could maintain its pharmacological activity and exhibit a sustained release profile of curcumin. The antibiofilm activities against single and mixed dual species of S. aureus and A. baumannii were evaluated using crystal violet staining techniques. Excellent antibiofilm activities were demonstrated by Cur-HAp NPs against S. aureus, A. baumannii, and mixed dual species, with respective efficiency percentages of 76.7, 85.6, and 68.8 % inhibition upon treatment, respectively. In addition, Cur-HAp NPs demonstrated excellent dye adsorption against Congo red dye by approximately 95.6 %. Cur-HAp could absorb up to 112.4 mg/g of dye at a time. Negative ΔG value (−1.372 kJmol−1) indicates the spontaneous and feasible dye absorption onto Cur-HAp. The Langmuir adsorption isotherm and pseudo-second-order equation provided the best fit for the Cur-HAp NPs. Therefore, the sustained drug release behavior of Cur-HAp NPs is a promising candidate for combatting antibiofilm activity and dye removal capacity.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"765 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134956945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103367
Zi-Han Tang, Chen Liang, Ruo-Chen Zhang
Cost optimization of biomass collection is indispensable for its increased utilization, especially in rural areas where crop residues (CRs)-based biomass is in abundance and energy is usually in short supply. However, due to the discrete distribution of rural settlements, the increasing economic and environmental costs associated with CRs collection have become key factors limiting its application. Therefore, this study proposes a method for optimizing the spatial pattern of CRs collection in rural areas while also considering transportation costs and carbon emissions reduction. Based on a multi-scenario location–allocation model, a CRs collection pattern was constructed for biomass resource points and energy facilities. An empirical study in Fujin County found that as CRs collection distance threshold (CDT) increased, transportation costs and carbon emissions reduction potential tended to increase and gradually converge. When the CDT was taken for 15 km, the spatial pattern of CRs collection maximized the overall benefits of transportation costs and carbon emissions reduction, with a transportation cost of 898,104 yuan and a carbon emissions reduction potential of 501,627.5 t. The optimal spatial pattern for collection achieved the collection-utilization spatial matching of 647 biomass feedstock resource points and 196 villages in the study area, resulting in the exploitation of 84% of CRs in total. 25% of villages in the study area can independently meet their heating needs through CRs, and 75% need to consider mixed energy sources for heating. This method can support planning and decision-making for the distributed development and sustainable utilization of biomass resources in rural areas.
{"title":"Optimizing crop residues collection patterns in rural areas to reduce transportation costs and carbon emissions","authors":"Zi-Han Tang, Chen Liang, Ruo-Chen Zhang","doi":"10.1016/j.eti.2023.103367","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103367","url":null,"abstract":"Cost optimization of biomass collection is indispensable for its increased utilization, especially in rural areas where crop residues (CRs)-based biomass is in abundance and energy is usually in short supply. However, due to the discrete distribution of rural settlements, the increasing economic and environmental costs associated with CRs collection have become key factors limiting its application. Therefore, this study proposes a method for optimizing the spatial pattern of CRs collection in rural areas while also considering transportation costs and carbon emissions reduction. Based on a multi-scenario location–allocation model, a CRs collection pattern was constructed for biomass resource points and energy facilities. An empirical study in Fujin County found that as CRs collection distance threshold (CDT) increased, transportation costs and carbon emissions reduction potential tended to increase and gradually converge. When the CDT was taken for 15 km, the spatial pattern of CRs collection maximized the overall benefits of transportation costs and carbon emissions reduction, with a transportation cost of 898,104 yuan and a carbon emissions reduction potential of 501,627.5 t. The optimal spatial pattern for collection achieved the collection-utilization spatial matching of 647 biomass feedstock resource points and 196 villages in the study area, resulting in the exploitation of 84% of CRs in total. 25% of villages in the study area can independently meet their heating needs through CRs, and 75% need to consider mixed energy sources for heating. This method can support planning and decision-making for the distributed development and sustainable utilization of biomass resources in rural areas.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"36 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134996059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fabricating low-cost and efficient adsorbents to purify water and soil with Cd-As contaminants remains challenging. Previous studies have demonstrated that alkali-modified and iron-modified biochar promote the adsorption of cationic and anionic pollutants. Herein, alkali/Fe-modified cotton straw-based biochar (FACSB) was fabricated, and its performance and the mechanism for remediation of Cd(II) and As(V) in water and soil were investigated. The initial pH, kinetics, isotherms, and coexisting ions on single and binary-adsorption water systems, whilst the temporal effects of passivation in co-contaminated soils, were systematically examined. The results showed that the maximum adsorption capacity of Cd and As were 42.57 and 30.69 mg/g for single-adsorption system, 41.27 and 34.51 mg/g for binary-adsorption adsorption system, respectively, enhancing adsorption for As when Cd presence. The presence of Mg2+ and Ca2+ competed with Cd, whereas PO43- inhibited As adsorption, and the high ionic strength exerted a detrimental impact on Cd adsorption. The mechanisms for removing Cd and As could mainly involve physisorption and chemisorption, respectively. Continuous soil incubation for half-year revealed a substantial reduction in the bioavailability of Cd and As, decreasing by 79.99% and 34.72%, respectively, at 5% treatment (amendment/soil ratio). The amendment, rising soil pH, and organic matter content (SOM) facilitated to immobilize contaminants. The above results indicate that FACSB is promising for Cd and As pollution remediation applications.
{"title":"Alkali/Fe-modified biochar for Cd-As contamination in water and soil: Performance and Mechanism","authors":"Linwei Zeng, Dinggui Luo, Lirong Liu, Xuexia Huang, Yu Liu, Lezhang Wei, Tangfu Xiao, Qihang Wu","doi":"10.1016/j.eti.2023.103381","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103381","url":null,"abstract":"Fabricating low-cost and efficient adsorbents to purify water and soil with Cd-As contaminants remains challenging. Previous studies have demonstrated that alkali-modified and iron-modified biochar promote the adsorption of cationic and anionic pollutants. Herein, alkali/Fe-modified cotton straw-based biochar (FACSB) was fabricated, and its performance and the mechanism for remediation of Cd(II) and As(V) in water and soil were investigated. The initial pH, kinetics, isotherms, and coexisting ions on single and binary-adsorption water systems, whilst the temporal effects of passivation in co-contaminated soils, were systematically examined. The results showed that the maximum adsorption capacity of Cd and As were 42.57 and 30.69 mg/g for single-adsorption system, 41.27 and 34.51 mg/g for binary-adsorption adsorption system, respectively, enhancing adsorption for As when Cd presence. The presence of Mg2+ and Ca2+ competed with Cd, whereas PO43- inhibited As adsorption, and the high ionic strength exerted a detrimental impact on Cd adsorption. The mechanisms for removing Cd and As could mainly involve physisorption and chemisorption, respectively. Continuous soil incubation for half-year revealed a substantial reduction in the bioavailability of Cd and As, decreasing by 79.99% and 34.72%, respectively, at 5% treatment (amendment/soil ratio). The amendment, rising soil pH, and organic matter content (SOM) facilitated to immobilize contaminants. The above results indicate that FACSB is promising for Cd and As pollution remediation applications.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"122 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the popularization and application of biogas engineering, byproduct biogas slurry has excellent application potential as organic liquid fertilizer, while its source and application rate significantly affect its effect. Irrational application of biogas slurry, can reduce crop yields and cause environmental problems such as soil salinization and diffuse source pollution. In this study, the impact of different types of biogas slurry from various materials (i.e., pig manure, chicken manure, vinasse, and kitchen waste) and their required application rates on the growth and incidence of cucumber were investigated by analyzing the dry weight of cucumber, soil chemical properties, soil extracellular enzyme activity, and the incidence of cucumber wilt disease. The results showed that the effects of the four selected types of biogas slurry on cucumber growth and disease were similar. It was shown that 3% was the most suitable application rate considering the dry weight of cucumber plants and the incidence of wilt disease. At this application rate, it was achievable to increase soil pH, soil AN, AK, Olsen P content, and enzyme activities without increasing the risk of salinization. In summary, despite different sources, biogas slurry showed the best growth promotion and disease suppression ability in 3% (v/w) application, without the risk of soil salinization.
{"title":"Effect of raw material and application rate of biogas slurry on Cucumber growth, Fusarium wilt suppression, and soil properties","authors":"Naihui Li, Xueyan Yang, Jiaqi Liu, Yanli Liu, Qing Chen, Fengzhi Wu, Ruixue Chang","doi":"10.1016/j.eti.2023.103396","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103396","url":null,"abstract":"With the popularization and application of biogas engineering, byproduct biogas slurry has excellent application potential as organic liquid fertilizer, while its source and application rate significantly affect its effect. Irrational application of biogas slurry, can reduce crop yields and cause environmental problems such as soil salinization and diffuse source pollution. In this study, the impact of different types of biogas slurry from various materials (i.e., pig manure, chicken manure, vinasse, and kitchen waste) and their required application rates on the growth and incidence of cucumber were investigated by analyzing the dry weight of cucumber, soil chemical properties, soil extracellular enzyme activity, and the incidence of cucumber wilt disease. The results showed that the effects of the four selected types of biogas slurry on cucumber growth and disease were similar. It was shown that 3% was the most suitable application rate considering the dry weight of cucumber plants and the incidence of wilt disease. At this application rate, it was achievable to increase soil pH, soil AN, AK, Olsen P content, and enzyme activities without increasing the risk of salinization. In summary, despite different sources, biogas slurry showed the best growth promotion and disease suppression ability in 3% (v/w) application, without the risk of soil salinization.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"59 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135062781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103417
Lian Duan, Chao Wang, Hongbin Yang, Wen Gu, Ying Shi, Lei Wei, Miao Zhang, Shaoxia Dong, Yang Mo, Yuanyuan Chen, Fuchang Deng, Mengmeng Wang, Yuehan Long, Chong Wang, Song Tang
To investigated the effects of desalinated seawater with excessive boron on reproduction of male rats Rats exposed to desalinated seawater (DSW), equivalent boron (B) water, and deionized water (control group) in a 90-days experiment. We explored sperm toxicity, testicular toxicity, and differential gene expression by detecting sperm quality, testicular enzyme activity, and transcriptome, and finally conducted fertility experiments. Results showed the sperm activity-motility (MOT) decreased and follicle-stimulating hormone (FSH) increased in both DSW and B groups at 30 days. As testicular enzymes, malate dehydrogenase (MDH) and lactate dehydrogenase isoenzyme-X (LDH-X) increased in DSW group, and 3-phosphoglyceraldehyde dehydrogenase (GAPD) increased in both DSW and B groups at 30 days. α-glycerol phosphate dehydrogenase (α-GDPH), sorbitol dehydrogenase (SDH), glucose-6-phosphate dehydrogenase (G6PDH), MDH and LDH-X in DSW and B groups decreased at 90 days. Transcriptome analysis revealing the downregulated genes (Dazl, Spef2 and Strbp) and upregulated genes (Catsper3, Gapdhs, Hils1, Odf2, Spata20, Spata24, Spata32 and Spem1) associated with male reproductive processes in 90-days DSW group. Our findings suggest that 30 days (short-term) exposure to DSW might decrease MOT by affecting energy metabolism. FSH and GAPD might be sensitive early biomarkers. 90 days (long-term) and low-dose exposure to DSW may cause spermatogenesis-related genetic changes.
研究过量硼淡化海水对雄性大鼠生殖能力的影响。在为期90天的实验中，大鼠分别暴露于淡化海水(DSW)、等量硼(B)水和去离子水(对照组)中。我们通过检测精子质量、睾丸酶活性和转录组来探索精子毒性、睾丸毒性和差异基因表达，最后进行生育实验。结果显示，DSW和B组在30 d时精子活力(MOT)降低，促卵泡激素(FSH)升高。随着睾丸酶的增加，DSW组苹果酸脱氢酶(MDH)和乳酸脱氢酶同工酶- x (LDH-X)升高，DSW组和B组3-磷酸甘油醛脱氢酶(GAPD)升高。DSW和B组α-甘油磷酸脱氢酶(α-GDPH)、山梨醇脱氢酶(SDH)、葡萄糖-6-磷酸脱氢酶(G6PDH)、MDH和LDH-X均在90 d时降低。转录组分析揭示了90天DSW组中与雄性生殖过程相关的下调基因(Dazl、Spef2和Strbp)和上调基因(Catsper3、Gapdhs、Hils1、Odf2、Spata20、Spata24、Spata32和Spem1)。我们的研究结果表明，30天(短期)暴露于DSW可能通过影响能量代谢来降低MOT。FSH和GAPD可能是敏感的早期生物标志物。90天(长期)和低剂量暴露于DSW可能导致与精子发生相关的遗传变化。
{"title":"Effects of desalinated seawater with excessive boron on reproductive health of male rats","authors":"Lian Duan, Chao Wang, Hongbin Yang, Wen Gu, Ying Shi, Lei Wei, Miao Zhang, Shaoxia Dong, Yang Mo, Yuanyuan Chen, Fuchang Deng, Mengmeng Wang, Yuehan Long, Chong Wang, Song Tang","doi":"10.1016/j.eti.2023.103417","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103417","url":null,"abstract":"To investigated the effects of desalinated seawater with excessive boron on reproduction of male rats Rats exposed to desalinated seawater (DSW), equivalent boron (B) water, and deionized water (control group) in a 90-days experiment. We explored sperm toxicity, testicular toxicity, and differential gene expression by detecting sperm quality, testicular enzyme activity, and transcriptome, and finally conducted fertility experiments. Results showed the sperm activity-motility (MOT) decreased and follicle-stimulating hormone (FSH) increased in both DSW and B groups at 30 days. As testicular enzymes, malate dehydrogenase (MDH) and lactate dehydrogenase isoenzyme-X (LDH-X) increased in DSW group, and 3-phosphoglyceraldehyde dehydrogenase (GAPD) increased in both DSW and B groups at 30 days. α-glycerol phosphate dehydrogenase (α-GDPH), sorbitol dehydrogenase (SDH), glucose-6-phosphate dehydrogenase (G6PDH), MDH and LDH-X in DSW and B groups decreased at 90 days. Transcriptome analysis revealing the downregulated genes (Dazl, Spef2 and Strbp) and upregulated genes (Catsper3, Gapdhs, Hils1, Odf2, Spata20, Spata24, Spata32 and Spem1) associated with male reproductive processes in 90-days DSW group. Our findings suggest that 30 days (short-term) exposure to DSW might decrease MOT by affecting energy metabolism. FSH and GAPD might be sensitive early biomarkers. 90 days (long-term) and low-dose exposure to DSW may cause spermatogenesis-related genetic changes.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103425
Bingwen Liu, Yang Xu, Fan Liu, Bing Li, Xiaonan Li, Runjie Zha, Shanquan Wang, Yong Qiu
Wastewater treatment plants (WWTPs) are important source of pharmaceuticals in the environment, identifying their relationship with antibiotic resistance genes (ARGs) and removal behavior is important for risk control. In this study, the correlations of common pharmaceuticals (including antibiotics and non-antibiotics) and ARGs both in wastewater and sludge were investigated, and machine learning was applied to predict the removal efficiencies of typical pharmaceuticals positively correlated with ARGs. Among the 23 kinds of target pharmaceuticals, both antibiotics and non-antibiotics were found to be positive with typical ARGs in wastewater (e.g. correlation coefficients between caffeine and blaTEM, aadD and qnrS were 0.738, 0.609, 0.936, p < 0.01) but negative in sludge (e.g. correlation coefficients between ofloxacin and tetO, tetW and qnrS were -0.922, -0.933 and -0.902, p<0.01), indicating the high risk of pharmaceuticals in wastewater promoting ARG spread. Furthermore, based on pharmaceutical removal efficiencies in different wastewater treatment processes in this and previous studies, the removal efficiencies of typical pharmaceuticals highly correlated with ARGs were well predicted through process operation parameters and wastewater characteristics by Random Forest model. HRT and temperature were identified as the most important explanatory variables. This study could provide comprehensive references for controlling pharmaceuticals in WWTPs.
{"title":"Occurrence and removal prediction of pharmaceuticals positively correlated with antibiotic resistance genes in wastewater treatment processes","authors":"Bingwen Liu, Yang Xu, Fan Liu, Bing Li, Xiaonan Li, Runjie Zha, Shanquan Wang, Yong Qiu","doi":"10.1016/j.eti.2023.103425","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103425","url":null,"abstract":"Wastewater treatment plants (WWTPs) are important source of pharmaceuticals in the environment, identifying their relationship with antibiotic resistance genes (ARGs) and removal behavior is important for risk control. In this study, the correlations of common pharmaceuticals (including antibiotics and non-antibiotics) and ARGs both in wastewater and sludge were investigated, and machine learning was applied to predict the removal efficiencies of typical pharmaceuticals positively correlated with ARGs. Among the 23 kinds of target pharmaceuticals, both antibiotics and non-antibiotics were found to be positive with typical ARGs in wastewater (e.g. correlation coefficients between caffeine and blaTEM, aadD and qnrS were 0.738, 0.609, 0.936, p < 0.01) but negative in sludge (e.g. correlation coefficients between ofloxacin and tetO, tetW and qnrS were -0.922, -0.933 and -0.902, p<0.01), indicating the high risk of pharmaceuticals in wastewater promoting ARG spread. Furthermore, based on pharmaceutical removal efficiencies in different wastewater treatment processes in this and previous studies, the removal efficiencies of typical pharmaceuticals highly correlated with ARGs were well predicted through process operation parameters and wastewater characteristics by Random Forest model. HRT and temperature were identified as the most important explanatory variables. This study could provide comprehensive references for controlling pharmaceuticals in WWTPs.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"65 6-7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.eti.2023.103428
Tengfei Wu, Junjie Lei, Liyun Lin, Qing Wang, Taimoor Hassan Farooq, Guangjun Wang, Jun Wang, Wende Yan
Developing high-efficient and easy-to-recover adsorbents for the removal of toxic metals in water is imperative, although it poses a huge challenge. In this study, a sulfur-functionalized metal-organic framework was incorporated into Ca-alginate/polyacrylic acid granulates as an effective adsorbent (abbr. CPZ-SH) for Cu2+ and Cd2+ removal. The physicochemical properties of the obtained CPZ-SH were determined by the integrated characterization techniques (e.g., FTIR, XRD, and SEM). The environmental effects of solution pH, typical background cations (K+, Na+, Mg2+, and Ca2+), and dissolved organic matter were assessed to determine the adsorption behaviors of the granulates. Time-dependent adsorption kinetics suggested that the adsorption process was dominated by an intraparticle diffusion procedure. CPZ-SH exhibited maximum adsorption capacities of 75.8 and 48.4 mg g–1 at 30 ℃, and excellent adsorption reusability with Cu2+ and Cd2+ adsorption efficiencies over 96.0% and 85.1% after 10 cycles, respectively. The extended X-ray absorption fine structure (EXAFS) demonstrated that the functional groups (thiol, carboxyl, and hydroxyl) played a crucial role in adsorption processes. The findings provided an effective strategy to construct nanostructured metal-organic frameworks (MOFs) into granulates as recyclable adsorbents and enable heavy metal removal from water.
{"title":"MOF-based Ca-alginate/PAA granulate beads for efficient heavy metal removal from water: Synthesis, performance, and mechanism","authors":"Tengfei Wu, Junjie Lei, Liyun Lin, Qing Wang, Taimoor Hassan Farooq, Guangjun Wang, Jun Wang, Wende Yan","doi":"10.1016/j.eti.2023.103428","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103428","url":null,"abstract":"Developing high-efficient and easy-to-recover adsorbents for the removal of toxic metals in water is imperative, although it poses a huge challenge. In this study, a sulfur-functionalized metal-organic framework was incorporated into Ca-alginate/polyacrylic acid granulates as an effective adsorbent (abbr. CPZ-SH) for Cu2+ and Cd2+ removal. The physicochemical properties of the obtained CPZ-SH were determined by the integrated characterization techniques (e.g., FTIR, XRD, and SEM). The environmental effects of solution pH, typical background cations (K+, Na+, Mg2+, and Ca2+), and dissolved organic matter were assessed to determine the adsorption behaviors of the granulates. Time-dependent adsorption kinetics suggested that the adsorption process was dominated by an intraparticle diffusion procedure. CPZ-SH exhibited maximum adsorption capacities of 75.8 and 48.4 mg g–1 at 30 ℃, and excellent adsorption reusability with Cu2+ and Cd2+ adsorption efficiencies over 96.0% and 85.1% after 10 cycles, respectively. The extended X-ray absorption fine structure (EXAFS) demonstrated that the functional groups (thiol, carboxyl, and hydroxyl) played a crucial role in adsorption processes. The findings provided an effective strategy to construct nanostructured metal-organic frameworks (MOFs) into granulates as recyclable adsorbents and enable heavy metal removal from water.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135371969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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