Pub Date : 2022-12-13DOI: 10.1080/26395940.2022.2156397
Ziyou Bai, Fuzhong Wu, Yinping He, Z. Han
ABSTRACT We collected tailings samples to assess and analyze the concentrations of heavy metals, pollution levels, and the risks posed by heavy metals in the tailings of the Zuoxiguo antimony mine to ecological and human health. The samples were selected by employing the serpentine sampling method, which were treated heavy-metal digestion method. Cu, Cr, Cd, and Pb were determined via inductively coupled plasma mass spectrometry, As and Sb were identified through atomic fluorescence, the average concentration of heavy metals in the tailings is: Sb (5902.77 mg/kg)>As (412.53 mg/kg)>Zn (155.42 mg/kg)>Cr (143.32 mg/kg)>Cu (92.68 mg/kg)>Pb (48.49 mg/kg)>Cd (3.29 mg/kg). The average Nemerow pollution index (NPI) was 553.06, indicating a high level of pollution. The average integrated ecological risk index (RI) result was 5395.94, indicating a serious threat to the study area’s ecology. The Non-carcinogenic health-risk index (HQ) suggested that all heavy metals posed a higher risk to children than to adults under different modes of exposure, with oral intake of Sb and As posing a non-carcinogenic risk to both adults and children, For adults, HQing value of Sb and As are 22.07 and 2.13, respectively; for child, HQing value of Sb and As are 178 and 16.29, which are exceeding limitation of 1. Dermal exposure posing a non-carcinogenic risk to child, for child, HQderm value of Sb and As are 14.96 and 3.32, which are also exceeding limitation of 1. The findings suggest that Sb and As pose serious threats to both the ecological environment and human health and that the local government should focus on Sb and As management for regions.
{"title":"Pollution and risk assessment of heavy metals in Zuoxiguo antimony mining area, southwest China","authors":"Ziyou Bai, Fuzhong Wu, Yinping He, Z. Han","doi":"10.1080/26395940.2022.2156397","DOIUrl":"https://doi.org/10.1080/26395940.2022.2156397","url":null,"abstract":"ABSTRACT We collected tailings samples to assess and analyze the concentrations of heavy metals, pollution levels, and the risks posed by heavy metals in the tailings of the Zuoxiguo antimony mine to ecological and human health. The samples were selected by employing the serpentine sampling method, which were treated heavy-metal digestion method. Cu, Cr, Cd, and Pb were determined via inductively coupled plasma mass spectrometry, As and Sb were identified through atomic fluorescence, the average concentration of heavy metals in the tailings is: Sb (5902.77 mg/kg)>As (412.53 mg/kg)>Zn (155.42 mg/kg)>Cr (143.32 mg/kg)>Cu (92.68 mg/kg)>Pb (48.49 mg/kg)>Cd (3.29 mg/kg). The average Nemerow pollution index (NPI) was 553.06, indicating a high level of pollution. The average integrated ecological risk index (RI) result was 5395.94, indicating a serious threat to the study area’s ecology. The Non-carcinogenic health-risk index (HQ) suggested that all heavy metals posed a higher risk to children than to adults under different modes of exposure, with oral intake of Sb and As posing a non-carcinogenic risk to both adults and children, For adults, HQing value of Sb and As are 22.07 and 2.13, respectively; for child, HQing value of Sb and As are 178 and 16.29, which are exceeding limitation of 1. Dermal exposure posing a non-carcinogenic risk to child, for child, HQderm value of Sb and As are 14.96 and 3.32, which are also exceeding limitation of 1. The findings suggest that Sb and As pose serious threats to both the ecological environment and human health and that the local government should focus on Sb and As management for regions.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75391052","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}
Pub Date : 2022-12-01DOI: 10.1080/26395940.2022.2152730
Imen Askri, Houda Ben Lamine, Raoudha Smiti, O. Tebourbi, Dorsaf Hallègue, M. Sakly, K. Ben Rhouma
ABSTRACT The use of pesticides has been widespread throughout the world. The intensive and uncontrolled use of these chemical substances has harmful effects on human health and the environment. Imidacloprid and Deltametrin are among the insecticides most commonly used. Our study evaluated the potential effects on hepatic function of Imidacloprid and Deltametrin in rats after subacute toxicity. Forty adult male Wistar rats were randomly divided into four groups of 10 rats each: the 1st group was the control; the 2nd group was exposed to Imidacloprid (25 mg/kg); the 3rd group received Deltametrin (200 mg/kg) and the 4th group received a mixture (Imidacloprid + Deltametrin) with the same dose for 30 days. The results showed that subacute exposure of rats to these insecticides induced a decrease in relative liver weights. On the other hand, hepatic activity was altered; however, there was a significant rise at the level of hepatic enzymes, blood sugar and lipids versus decreased protein in treated rats. These modifications were accompanied by alterations of the hepatic tissue structure in the treated rats, compared to the controls which remained intact. The alterations and lesions were more marked in the animals receiving the Imidacloprid and Deltametrin mixture. Subacute toxicity of Imidacloprid and Deltametrin, used individually or together, disturb liver function in rats and the treatment with the combination of the two worsens the condition.
{"title":"Effect of intoxication by gavage with pyrethroid and neonicotinoid insecticides on the liver in adult male rats of the Wistar strain","authors":"Imen Askri, Houda Ben Lamine, Raoudha Smiti, O. Tebourbi, Dorsaf Hallègue, M. Sakly, K. Ben Rhouma","doi":"10.1080/26395940.2022.2152730","DOIUrl":"https://doi.org/10.1080/26395940.2022.2152730","url":null,"abstract":"ABSTRACT The use of pesticides has been widespread throughout the world. The intensive and uncontrolled use of these chemical substances has harmful effects on human health and the environment. Imidacloprid and Deltametrin are among the insecticides most commonly used. Our study evaluated the potential effects on hepatic function of Imidacloprid and Deltametrin in rats after subacute toxicity. Forty adult male Wistar rats were randomly divided into four groups of 10 rats each: the 1st group was the control; the 2nd group was exposed to Imidacloprid (25 mg/kg); the 3rd group received Deltametrin (200 mg/kg) and the 4th group received a mixture (Imidacloprid + Deltametrin) with the same dose for 30 days. The results showed that subacute exposure of rats to these insecticides induced a decrease in relative liver weights. On the other hand, hepatic activity was altered; however, there was a significant rise at the level of hepatic enzymes, blood sugar and lipids versus decreased protein in treated rats. These modifications were accompanied by alterations of the hepatic tissue structure in the treated rats, compared to the controls which remained intact. The alterations and lesions were more marked in the animals receiving the Imidacloprid and Deltametrin mixture. Subacute toxicity of Imidacloprid and Deltametrin, used individually or together, disturb liver function in rats and the treatment with the combination of the two worsens the condition.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75210338","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}
ABSTRACT The effects of rhamnolipid chelating La (III) or Nd (III) on m-dichlorobenzene removal and biofilm growth were investigated. The rhamnolipid chelating La (III) or Nd (III) significantly increased the average m-dichlorobenzene elimination capacity by 24% and 29%, respectively, on day 70–130, and the average wet weights of biomass ranged from 11 kg/m3 to 15 kg/m3 in BTFs on day 100–180 at an inlet load of at 47–98 gm3/h and an EBRT of 60s-90s. Microbial community functional genes about biofilm growth and m-dichlorobenzene removal were also increased. In addition, the rhamnolipid chelating La (III) or Nd (III) can improve the membrane permeability, extracellular polymeric substance (EPS) production, catechol 2,3 dioxygenase (C23O) enzyme, and chlorobenzene dioxygenase activity. These results demonstrate that rhamnolipid chelating La (III) or Nd (III) have the potential to improve the performance of BTFs treating hydrophobic and highly toxic VOCs. Graphical Abstract
{"title":"Synchronously enhanced biofilm formation and m-dichlorobenzene removal in biotrickling filters by rhamnolipid chelating rare earth elements","authors":"Bairen Yang, Jiajie Wang, Qingqing Shang, Zhuqiu Sun, Yifan Wu","doi":"10.1080/26395940.2022.2151516","DOIUrl":"https://doi.org/10.1080/26395940.2022.2151516","url":null,"abstract":"ABSTRACT The effects of rhamnolipid chelating La (III) or Nd (III) on m-dichlorobenzene removal and biofilm growth were investigated. The rhamnolipid chelating La (III) or Nd (III) significantly increased the average m-dichlorobenzene elimination capacity by 24% and 29%, respectively, on day 70–130, and the average wet weights of biomass ranged from 11 kg/m3 to 15 kg/m3 in BTFs on day 100–180 at an inlet load of at 47–98 gm3/h and an EBRT of 60s-90s. Microbial community functional genes about biofilm growth and m-dichlorobenzene removal were also increased. In addition, the rhamnolipid chelating La (III) or Nd (III) can improve the membrane permeability, extracellular polymeric substance (EPS) production, catechol 2,3 dioxygenase (C23O) enzyme, and chlorobenzene dioxygenase activity. These results demonstrate that rhamnolipid chelating La (III) or Nd (III) have the potential to improve the performance of BTFs treating hydrophobic and highly toxic VOCs. Graphical Abstract","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76842520","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}
Pub Date : 2022-11-27DOI: 10.1080/26395940.2022.2151515
Y. Liang, Liang Ding, Qing Song, Ben Zhao, Siyu Wang, Sheng Liu
ABSTRACT Biodegradation could remove atrazine from contaminated soil and water. In this work, three isolated bacterial strains D2, D6, and D17 were identified as Solibacillus, Bacillus, and Arthrobacter, respectively.They can rapidly degrade atrazine and effectively alleviate the phytotoxic effects of atrazine, with degradation efficiency following D2> D6>D17. Besides having the highest amount of exoenzyme and endoenzyme, the highest exoenzyme ratio in strain D2 also contributed to the highest atrazine degradation, as exoenzyme facilitated the direct reaction with atrazine in a short time and alleviated the stress of pollutant on strains, while more endoenzyme for D6 and D17 indicated degradation acted only after across the membrane, which needs more time to degradation. Furthermore, trzN in strain D2 can degrade atrazine to hydroxyatrazine. The biodegradation product of atrazine by strain D2 was cyanuric acid via dichlorination, hydroxylation, hydrodealkylation, methylation, dealkylation, elimination, and hydrolysis.
{"title":"Biodegradation of atrazine by three strains: identification, enzymes activities, and biodegradation mechanism","authors":"Y. Liang, Liang Ding, Qing Song, Ben Zhao, Siyu Wang, Sheng Liu","doi":"10.1080/26395940.2022.2151515","DOIUrl":"https://doi.org/10.1080/26395940.2022.2151515","url":null,"abstract":"ABSTRACT Biodegradation could remove atrazine from contaminated soil and water. In this work, three isolated bacterial strains D2, D6, and D17 were identified as Solibacillus, Bacillus, and Arthrobacter, respectively.They can rapidly degrade atrazine and effectively alleviate the phytotoxic effects of atrazine, with degradation efficiency following D2> D6>D17. Besides having the highest amount of exoenzyme and endoenzyme, the highest exoenzyme ratio in strain D2 also contributed to the highest atrazine degradation, as exoenzyme facilitated the direct reaction with atrazine in a short time and alleviated the stress of pollutant on strains, while more endoenzyme for D6 and D17 indicated degradation acted only after across the membrane, which needs more time to degradation. Furthermore, trzN in strain D2 can degrade atrazine to hydroxyatrazine. The biodegradation product of atrazine by strain D2 was cyanuric acid via dichlorination, hydroxylation, hydrodealkylation, methylation, dealkylation, elimination, and hydrolysis.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77768978","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}
Pub Date : 2022-11-20DOI: 10.1080/26395940.2022.2147098
M. Nur, I. N. Djarot, P. Boelen, Hadiyanto, H. J. Heeres
ABSTRACT POME is an excellent cultivation medium for the production of microalgae because it includes high macro and micronutrients. Nevertheless, microalga cultivation is laborious to maintain under outdoor condition. The aim of this reseasch was to evaluate the potency of co-cultivation strategy to improve growth and lipid production of mixed algae when growing on POME under dynamic outdoor condition. Cultivation was done in outdoor condition by comparing synthetic medium and POME medium, and optimizing the enviromental and nutritional conditions by using Box-behnken response surface methodology (RSM). Results showed that high growth rate (0.35/d) and lipid (40%) were achieved when 75% POME fraction, 30 PSU salinity, and 450 mg/L urea were used. The increasing POME fraction and urea addition enhanced SFA formation to MUFA and PUFA in the fatty acid profiles. We conclude that co-cultivation strategy on POME could promote growth rate and lipid production of mixed algae under outdoor condition.
{"title":"Co-cultivation of microalgae growing on palm oil mill effluent under outdoor condition for lipid production","authors":"M. Nur, I. N. Djarot, P. Boelen, Hadiyanto, H. J. Heeres","doi":"10.1080/26395940.2022.2147098","DOIUrl":"https://doi.org/10.1080/26395940.2022.2147098","url":null,"abstract":"ABSTRACT POME is an excellent cultivation medium for the production of microalgae because it includes high macro and micronutrients. Nevertheless, microalga cultivation is laborious to maintain under outdoor condition. The aim of this reseasch was to evaluate the potency of co-cultivation strategy to improve growth and lipid production of mixed algae when growing on POME under dynamic outdoor condition. Cultivation was done in outdoor condition by comparing synthetic medium and POME medium, and optimizing the enviromental and nutritional conditions by using Box-behnken response surface methodology (RSM). Results showed that high growth rate (0.35/d) and lipid (40%) were achieved when 75% POME fraction, 30 PSU salinity, and 450 mg/L urea were used. The increasing POME fraction and urea addition enhanced SFA formation to MUFA and PUFA in the fatty acid profiles. We conclude that co-cultivation strategy on POME could promote growth rate and lipid production of mixed algae under outdoor condition.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79617363","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}
ABSTRACT Herein, a novel photocatalyst of Ag3PO4/Bi2WO6 was developed via hydrothermal and precipitation method. Its structure and morphology was characterized through XRD, XPS, SEM, TEM, HRTEM, BET, UV-vis DRS, PL, and so on. By employing toluene photodegradation experiment under visible light, the photocatalytic performance of Ag3PO4/Bi2WO6 was proved to be better than Ag3PO4 and Bi2WO6 alone due to the efficient separation of electron-hole pairs. When the molar ratio of Ag3PO4 to Bi2WO6 was 1:2, the degradation rate of toluene could reach 80% within 180 min. This study provided a new idea for the simple preparation of cheap and efficient nanocomposite materials for VOCs degradation by visible light.
{"title":"Preparation of a visible light catalyst of novel Bi2WO6 loaded Ag3PO4 heterojunction and its efficient removal of toluene","authors":"Qi Zhang, Yuyu Zhu, Liangyun Yu, Xuexing Dong, Yifan Wu, Bairen Yang, Qixin Xu","doi":"10.1080/26395940.2022.2146000","DOIUrl":"https://doi.org/10.1080/26395940.2022.2146000","url":null,"abstract":"ABSTRACT Herein, a novel photocatalyst of Ag3PO4/Bi2WO6 was developed via hydrothermal and precipitation method. Its structure and morphology was characterized through XRD, XPS, SEM, TEM, HRTEM, BET, UV-vis DRS, PL, and so on. By employing toluene photodegradation experiment under visible light, the photocatalytic performance of Ag3PO4/Bi2WO6 was proved to be better than Ag3PO4 and Bi2WO6 alone due to the efficient separation of electron-hole pairs. When the molar ratio of Ag3PO4 to Bi2WO6 was 1:2, the degradation rate of toluene could reach 80% within 180 min. This study provided a new idea for the simple preparation of cheap and efficient nanocomposite materials for VOCs degradation by visible light.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80568139","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}
Pub Date : 2022-11-06DOI: 10.1080/26395940.2022.2142672
Hongyuan Li, Yujing Wang, Wenchao Du, Hua He, Shaogui Yang
ABSTRACT Soil contamination with perfluorooctanoic acid (PFOA) is a global concern. PFOA in soil can enter plants, affect plant growth and threaten food safety. Therefore, understanding the plant utilization and phytotoxicity of PFOA is conducive to assessing the environmental risk of soil contaminated with PFOA. This review analyzed recent studies about the uptake and effects of PFOA on terrestrial plants from the aspects of absorption, transport, distribution, phytotoxicity, and the underlying mechanism. Based on current research, PFOA was predominantly taken by plant roots and showed adverse effects on plants by affecting the antioxidant system and metabolic process. Research in field or higher terrestrial plants is still very scarce. Given the importance of exploring the potential remediation methods for PFOA, more research with comprehensive consideration of soil and environmental factors should be carried out to tell its specific mechanisms of plant utilization and toxicity action.
{"title":"Interaction of Perfluorooctanoic Acid with terrestrial plants: Uptake, transfer and phytotoxicity aspects","authors":"Hongyuan Li, Yujing Wang, Wenchao Du, Hua He, Shaogui Yang","doi":"10.1080/26395940.2022.2142672","DOIUrl":"https://doi.org/10.1080/26395940.2022.2142672","url":null,"abstract":"ABSTRACT Soil contamination with perfluorooctanoic acid (PFOA) is a global concern. PFOA in soil can enter plants, affect plant growth and threaten food safety. Therefore, understanding the plant utilization and phytotoxicity of PFOA is conducive to assessing the environmental risk of soil contaminated with PFOA. This review analyzed recent studies about the uptake and effects of PFOA on terrestrial plants from the aspects of absorption, transport, distribution, phytotoxicity, and the underlying mechanism. Based on current research, PFOA was predominantly taken by plant roots and showed adverse effects on plants by affecting the antioxidant system and metabolic process. Research in field or higher terrestrial plants is still very scarce. Given the importance of exploring the potential remediation methods for PFOA, more research with comprehensive consideration of soil and environmental factors should be carried out to tell its specific mechanisms of plant utilization and toxicity action.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73487961","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}
Pub Date : 2022-10-21DOI: 10.1080/26395940.2022.2137061
A. Giwa, Mingqiang Sheng, Xiaoqian Zhang, Yuanyuan Wu, Huang Bo, A. Memon, Shuqin Bai, N. Ali, Jean Maurice Ndungutse, Wang Kaijun
ABSTRACT Continuous population growth associated with sanitation, food waste (FW), and domestic wastewater (DWW) is becoming critical globally. Crucial efforts and appropriate measures to utilize the FW and DWW for resources are needed. This paper reviews the conventional treatment techniques, challenges, and associated merits for treating FW and DWW. In the context of this review, DWW is often referred to as blackwater (BW)/feces. Due to the rationale for resource amplification, the review proposed that both mixtures (FW and DWW) be stored in a sub-surface storage tank for several months or years. They are further biodegraded in a bioprocess to generate energy with stabilized digestates. The effluent’s peculiar features are low organic acids with a low pH4 value, offering a stabilized and sanitized effluent. The second proposed route was to integrate anaerobic digestion, composting, and pyrolysis. Anaerobic digestion will offer bioenergy and digestates. Composting will cater to compost production and avert digestate drying and heating costs during pyrolysis. The pyrolysis of the digestates will generate biochar and bioenergy materials, while improved bioprocess performance is attained with the simultaneous biochar utilization in the bioprocess. The integrated technological routes can valorize DWW and FW for maximum resource recovery and sustainable development in a real-world context. The concept can be applied to an existing facility to create a cleaner and more efficient DWW with FW recycling. However, a comprehensive techno-economic analysis must be conducted.
{"title":"Approaches for treating domestic wastewater with food waste and recovery of potential resources","authors":"A. Giwa, Mingqiang Sheng, Xiaoqian Zhang, Yuanyuan Wu, Huang Bo, A. Memon, Shuqin Bai, N. Ali, Jean Maurice Ndungutse, Wang Kaijun","doi":"10.1080/26395940.2022.2137061","DOIUrl":"https://doi.org/10.1080/26395940.2022.2137061","url":null,"abstract":"ABSTRACT Continuous population growth associated with sanitation, food waste (FW), and domestic wastewater (DWW) is becoming critical globally. Crucial efforts and appropriate measures to utilize the FW and DWW for resources are needed. This paper reviews the conventional treatment techniques, challenges, and associated merits for treating FW and DWW. In the context of this review, DWW is often referred to as blackwater (BW)/feces. Due to the rationale for resource amplification, the review proposed that both mixtures (FW and DWW) be stored in a sub-surface storage tank for several months or years. They are further biodegraded in a bioprocess to generate energy with stabilized digestates. The effluent’s peculiar features are low organic acids with a low pH4 value, offering a stabilized and sanitized effluent. The second proposed route was to integrate anaerobic digestion, composting, and pyrolysis. Anaerobic digestion will offer bioenergy and digestates. Composting will cater to compost production and avert digestate drying and heating costs during pyrolysis. The pyrolysis of the digestates will generate biochar and bioenergy materials, while improved bioprocess performance is attained with the simultaneous biochar utilization in the bioprocess. The integrated technological routes can valorize DWW and FW for maximum resource recovery and sustainable development in a real-world context. The concept can be applied to an existing facility to create a cleaner and more efficient DWW with FW recycling. However, a comprehensive techno-economic analysis must be conducted.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79228807","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}
ABSTRACT Nanoparticles coated with electrospun fibers cannot fully exert their inherent properties. Therefore, it is critical to develop a method to enhance the intrinsic performances of the composite fibers. In this work, UiO-66/PAN composite nanofiber membranes with good physicochemical properties were prepared by electrospinning, and a swelling method was developed to improve its performances. The adsorption performance for arsenate was improved by 19.9% or 49% after swelling by nitrobenzene or pyridine solvent, respectively. The swelling process did not change the morphologies and structures of the fibers. The pyridine solvent as the swelling agent improved the adsorption performance of the nanofiber membrane by about 45% in 1 hour. There was no detectable leached Zr in the remaining solution, indicating that the composite membrane was stable during the course. This work provides a new strategy for functional promotion of electrospun nanofiber membrane and will be helpful for environmentally friendly applications of nanocomposites in water remediation.
{"title":"Reviving of embedded MOFs in electrospun nanofibers by solvent swelling for arsenate removal in water","authors":"Qi Guo, Yuan Li, Xiaoyan Wei, Yi-Wen Shen, Xuelei Duan, Kai-Qiang He, Ke-gang Zhang, Chunmei Yuan","doi":"10.1080/26395940.2022.2136111","DOIUrl":"https://doi.org/10.1080/26395940.2022.2136111","url":null,"abstract":"ABSTRACT Nanoparticles coated with electrospun fibers cannot fully exert their inherent properties. Therefore, it is critical to develop a method to enhance the intrinsic performances of the composite fibers. In this work, UiO-66/PAN composite nanofiber membranes with good physicochemical properties were prepared by electrospinning, and a swelling method was developed to improve its performances. The adsorption performance for arsenate was improved by 19.9% or 49% after swelling by nitrobenzene or pyridine solvent, respectively. The swelling process did not change the morphologies and structures of the fibers. The pyridine solvent as the swelling agent improved the adsorption performance of the nanofiber membrane by about 45% in 1 hour. There was no detectable leached Zr in the remaining solution, indicating that the composite membrane was stable during the course. This work provides a new strategy for functional promotion of electrospun nanofiber membrane and will be helpful for environmentally friendly applications of nanocomposites in water remediation.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73233338","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}
Pub Date : 2022-10-06DOI: 10.1080/26395940.2022.2130825
Yixiao Wu, Huijun Ding, L. Wan, Weihao Zhang, Yan Zhang, L. Yang, Chong Zhao
ABSTRACT This study compared the single and joint toxic effects of clarithromycin (CLA) and levofloxacin (LEV) on Microcystis aeruginosa. CLA was more toxic to algae than LEV, and the 96h-EC50s were 43.31 and 437.6 µg/L, respectively. The synergetic interaction of two antibiotics was detected. This synergetic action was also observed on Fv/Fm, chlorophyll a, and phycobiliprotein. The increase in reactive oxygen species (ROS) and malonaldehyde demonstrated that antibiotic exposure caused severe oxidative stress, which can destroy the membrane system, hinder photosynthesis and finally inhibit cell growth. The antioxidant enzyme activities were improved significantly, especially in the joint exposure treatment, which indicates that the antioxidant defense system can be activated to scavenge ROS. The release of microcystins (MCs) was accelerated under single or combined antibiotic exposure. The promotion of MCs discharge from cyanobacteria caused by the co-occurrence of CLA and LEV in water environment may pose a severe ecological risk to ecosystem.
{"title":"Single and combined toxic effects of clarithromycin and levofloxacin on Microcystis aeruginosa","authors":"Yixiao Wu, Huijun Ding, L. Wan, Weihao Zhang, Yan Zhang, L. Yang, Chong Zhao","doi":"10.1080/26395940.2022.2130825","DOIUrl":"https://doi.org/10.1080/26395940.2022.2130825","url":null,"abstract":"ABSTRACT This study compared the single and joint toxic effects of clarithromycin (CLA) and levofloxacin (LEV) on Microcystis aeruginosa. CLA was more toxic to algae than LEV, and the 96h-EC50s were 43.31 and 437.6 µg/L, respectively. The synergetic interaction of two antibiotics was detected. This synergetic action was also observed on Fv/Fm, chlorophyll a, and phycobiliprotein. The increase in reactive oxygen species (ROS) and malonaldehyde demonstrated that antibiotic exposure caused severe oxidative stress, which can destroy the membrane system, hinder photosynthesis and finally inhibit cell growth. The antioxidant enzyme activities were improved significantly, especially in the joint exposure treatment, which indicates that the antioxidant defense system can be activated to scavenge ROS. The release of microcystins (MCs) was accelerated under single or combined antibiotic exposure. The promotion of MCs discharge from cyanobacteria caused by the co-occurrence of CLA and LEV in water environment may pose a severe ecological risk to ecosystem.","PeriodicalId":11785,"journal":{"name":"Environmental Pollutants and Bioavailability","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73902823","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}
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