This study aimed to evaluate the effects of an accumulated lead pollution model on the structure and metabolic functions of culturable soil microorganisms, as well as and their mechanisms of adaptation to lead contamination.The research employed the dilution plate culture method and the Biology EcoPlate method to investigate culturable microorganisms.The results indicated that, in comparison to soil exposed to a single instance of contamination, soil subjected to multiple exposures exhibited higher levels of culturable microbial activity.The total carbon sources utilized by culturable microorganisms increased with the concentration of lead pollution.Fungi demonstrated a greater resilience to relatively high lead pollution, while certain bacteria exhibited tolerance to high concentrations of lead.Conversely, actinomycetes populations declined with increasing pollution concentration, being significantly higher in soils with accumulated pollution (2.71-3.7510^5/g) than in soils with single instance pollution (0.80-2.4910^5/g).Soil respiration decreased as lead pollution concentration rose, from 17.33 mg/g/h to 4.85 mg/g/h.The accumulated pollution model resulted in a greater increase in soil organic carbon (12.63-12.67g/kg) and microbial biomass carbon (64.13-73.38 mg/kg) compared to the single-instance pollution model (11.91-11.96g/kg and 47.58-61.61mg/kg).The highest levels of microbial biomass C were observed in high lead treatments under both pollution models.For the same lead concentration, the accumulated contamination model yielded a higher McIntosh index.This study utilized the accumulated lead pollution model to simulate the gradual accumulation of lead in real-world soil conditions, demonstrating higher levels of culturable microbial activity in tea garden soil and indicating its potential for more accurately assessing lead risks in actual soil environments.
{"title":"LEAD WITH ACCUMULATED POLLUTION MODEL AFFECTED MICROBIAL ACTIVITY AND FUNCTIONAL DIVERSITY IN TEA GARDEN SOIL OF ANHUI PROVINCE, CHINA","authors":"Gaofei Ge, Ziyan Zhang, Lu Xu, Qingmei Deng","doi":"10.30638/eemj.2025.149","DOIUrl":"https://doi.org/10.30638/eemj.2025.149","url":null,"abstract":"This study aimed to evaluate the effects of an accumulated lead pollution model on the structure and metabolic functions of culturable soil microorganisms, as well as and their mechanisms of adaptation to lead contamination.The research employed the dilution plate culture method and the Biology EcoPlate method to investigate culturable microorganisms.The results indicated that, in comparison to soil exposed to a single instance of contamination, soil subjected to multiple exposures exhibited higher levels of culturable microbial activity.The total carbon sources utilized by culturable microorganisms increased with the concentration of lead pollution.Fungi demonstrated a greater resilience to relatively high lead pollution, while certain bacteria exhibited tolerance to high concentrations of lead.Conversely, actinomycetes populations declined with increasing pollution concentration, being significantly higher in soils with accumulated pollution (2.71-3.7510^5/g) than in soils with single instance pollution (0.80-2.4910^5/g).Soil respiration decreased as lead pollution concentration rose, from 17.33 mg/g/h to 4.85 mg/g/h.The accumulated pollution model resulted in a greater increase in soil organic carbon (12.63-12.67g/kg) and microbial biomass carbon (64.13-73.38 mg/kg) compared to the single-instance pollution model (11.91-11.96g/kg and 47.58-61.61mg/kg).The highest levels of microbial biomass C were observed in high lead treatments under both pollution models.For the same lead concentration, the accumulated contamination model yielded a higher McIntosh index.This study utilized the accumulated lead pollution model to simulate the gradual accumulation of lead in real-world soil conditions, demonstrating higher levels of culturable microbial activity in tea garden soil and indicating its potential for more accurately assessing lead risks in actual soil environments.","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"24 9","pages":"1923-1933"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://doi.org/10.30638/eemj.2025.149","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147899084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"ANALYSIS OF THE DRIVING MECHANISM AND COUNTERMEASURES FOR GREEN BUILDING DEVELOPMENT BASED ON STRUCTURAL EQUATION MODELING","authors":"Jian Chen, Lifeng Rao","doi":"10.30638/eemj.2023.097","DOIUrl":"https://doi.org/10.30638/eemj.2023.097","url":null,"abstract":"","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135009861","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}
{"title":"MICROBIAL OIL PRODUCTION USING NEWLY ISOLATED Wickerhamomyces subpelliculosus 6 GROWN IN WASTE ROSE PULP","authors":"Merih Kivanc, Ayse Gokdal Otuzbiroglu","doi":"10.30638/eemj.2023.090","DOIUrl":"https://doi.org/10.30638/eemj.2023.090","url":null,"abstract":"","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135699215","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}
A. Agyemang, K. Yusheng, Maxwell Kongkuah, A. Musah, M. Musah
{"title":"ASSESSING THE IMPACT OF ENVIRONMENTAL ACCOUNTING DISCLOSURE ON CORPORATE PERFORMANCE IN CHINA","authors":"A. Agyemang, K. Yusheng, Maxwell Kongkuah, A. Musah, M. Musah","doi":"10.30638/eemj.2023.030","DOIUrl":"https://doi.org/10.30638/eemj.2023.030","url":null,"abstract":"","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69521161","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}
In order to develop the carbon emission market in a positive and healthy direction, how to price carbon emission rights effectively is an issue worth studying. This paper compares the advantages, disadvantages and applicability of several commonly used pricing methods, and finally chooses the Black-Scholes model (hereinafter referred to as ‘B-S’ model) as the base model to carry out the study. Since the volatility of carbon emission rights is subject to fluctuations, the historical volatility in the BS model cannot fully reflect the real market situation. In order to solve this problem, the GARCH model is introduced to fit the volatility of returns to improve the accuracy of the BS model. However, as the amount of data increases, the modeling ability of the GARCH model cannot fully simulate volatility. The GARCH model is the most commonly used model for modeling the volatility of financial time series data, while the LSTM model requires high initial values. The combination of the two models improves the accuracy of the model and is tested by empirical evidence. The results of this paper enrich the theoretical system of carbon emission rights assessment.
{"title":"PRICING CARBON CREDITS BASED ON MODIFIED BLACK-SCHOLES","authors":"Yi Song, D. Chang","doi":"10.30638/eemj.2023.037","DOIUrl":"https://doi.org/10.30638/eemj.2023.037","url":null,"abstract":"In order to develop the carbon emission market in a positive and healthy direction, how to price carbon emission rights effectively is an issue worth studying. This paper compares the advantages, disadvantages and applicability of several commonly used pricing methods, and finally chooses the Black-Scholes model (hereinafter referred to as ‘B-S’ model) as the base model to carry out the study. Since the volatility of carbon emission rights is subject to fluctuations, the historical volatility in the BS model cannot fully reflect the real market situation. In order to solve this problem, the GARCH model is introduced to fit the volatility of returns to improve the accuracy of the BS model. However, as the amount of data increases, the modeling ability of the GARCH model cannot fully simulate volatility. The GARCH model is the most commonly used model for modeling the volatility of financial time series data, while the LSTM model requires high initial values. The combination of the two models improves the accuracy of the model and is tested by empirical evidence. The results of this paper enrich the theoretical system of carbon emission rights assessment.","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69521314","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}
{"title":"THE FREEZE-THAW DURABILITY OF CONCRETE WITH FLY ASH, MICROSILICA AND FIBERS","authors":"S. Scripcă, M. Bărbuță","doi":"10.30638/eemj.2023.057","DOIUrl":"https://doi.org/10.30638/eemj.2023.057","url":null,"abstract":"","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69523771","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}
In the present study, calcite-hematite composite was prepared by coprecipitation method at pH 10 and at pH 12. The XRD analysis confirms the formation of both calcite and hematite in the two cases. Batch experiments were undertaken for characterizing the efficiency of the prepared composite for Cr(VI) removal from water. Effects of pH, temperature, contact time and Cr(VI) initial concentration were studied. The obtained results reveal that Cr(VI) removal is favorable at acidic pH. At pH 4, removal percentage of about 80% is obtained at equilibrium either the composite was prepared at pH 10 or at pH 12. Cr(VI) adsorption by the prepared calcite-hematite composite is spontaneous and exothermic whatever the pH of the preparation. In addition, the removal kinitics is well described by the second-order model both at acidic and neutral pH. The maximal adsorption capacities calculated by Langmuir equation suggest that the pH of the preparation has no effect when Cr(VI) is removed at pH 4. In this case, the maximal adsorption capacity is about 9mg Cr(VI)/g wether the composite was prepared at pH 10 or at pH 12.
{"title":"CHARACTERIZATION OF Cr(VI) REMOVAL BY CALCITE-HEMATITE COMPOSITE","authors":"C. Boukhalfa, Radja Bousseboua, Loubna Bouhouf","doi":"10.30638/eemj.2023.073","DOIUrl":"https://doi.org/10.30638/eemj.2023.073","url":null,"abstract":"In the present study, calcite-hematite composite was prepared by coprecipitation method at pH 10 and at pH 12. The XRD analysis confirms the formation of both calcite and hematite in the two cases. Batch experiments were undertaken for characterizing the efficiency of the prepared composite for Cr(VI) removal from water. Effects of pH, temperature, contact time and Cr(VI) initial concentration were studied. The obtained results reveal that Cr(VI) removal is favorable at acidic pH. At pH 4, removal percentage of about 80% is obtained at equilibrium either the composite was prepared at pH 10 or at pH 12. Cr(VI) adsorption by the prepared calcite-hematite composite is spontaneous and exothermic whatever the pH of the preparation. In addition, the removal kinitics is well described by the second-order model both at acidic and neutral pH. The maximal adsorption capacities calculated by Langmuir equation suggest that the pH of the preparation has no effect when Cr(VI) is removed at pH 4. In this case, the maximal adsorption capacity is about 9mg Cr(VI)/g wether the composite was prepared at pH 10 or at pH 12.","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69525494","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}
{"title":"TREATMENT OF A TEXTILE WASTEWATER USING SULFATE AND HYDROXYL RADICALS BASED OXIDATION UNDER THE UV LIGHT: A COMPARISON BETWEEN UV/H2O2, UV/PS AND UV/PMS","authors":"D. Çifçi, Ozlem Sensoy, Elçin Gunes, Yalçın Gunes","doi":"10.30638/eemj.2023.002","DOIUrl":"https://doi.org/10.30638/eemj.2023.002","url":null,"abstract":"","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69518928","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}
{"title":"INVESTIGATIONS ON DETECTION AND FILTERING OF INDOOR AIR POLLUTANTS EMPLOYING COST-EFFECTIVE CONTROLLER FOR ASTHMA MANAGEMENT","authors":"Alagammal Subbaraman, Muralidharan Srinivasan, Bhavani Ramachandran","doi":"10.30638/eemj.2023.007","DOIUrl":"https://doi.org/10.30638/eemj.2023.007","url":null,"abstract":"","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69519484","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}
{"title":"EFFICIENT REDUCTION OF NITRITE BY STRUCTURAL Fe(II) IN MONTMORILLONITE","authors":"Yasir Al-Ani, Z. M. Ismael, Ahmed Rahomi Rajab","doi":"10.30638/eemj.2023.026","DOIUrl":"https://doi.org/10.30638/eemj.2023.026","url":null,"abstract":"","PeriodicalId":11685,"journal":{"name":"Environmental Engineering and Management Journal","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69521042","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：