Pub Date : 2023-07-01DOI: 10.32526/ennrj/21/20230036
Rania Nawra Thifali Izdihar, Diah Ariyanti Perdana, Farial Alwaini, A. P. Nugroho
Mancozeb and methomyl are active ingredients commonly contained in pesticides applied in shallot farming. Surface runoff can carry pesticide residues that enter water bodies and affect non-target organisms, such as Daphnia magna. This study evaluated the genotoxicity effects of individual and combined mancozeb and methomyl on the DNA damage of D. magna. Organisms at 24 h old and 48 h old were exposed to individual and combined concentrations of mancozeb and methomyl for 24 h to obtain the LC50-24 h values. These values were used to evaluate DNA damage by calculating the tail intensity (TI) (%), tail moment (TM), and tail factor (TF). Results showed that based on the LC50-24 h values, methomyl has the highest toxicity level, followed by the mancozeb:methomyl combination, and then mancozeb. The combination index of mancozeb:methomyl for both D. magna ages (24 h and 48 h) indicated that the two pesticides antagonistically interact (CI>1). However, based on TI%, TM, and TF values, the level of damage was almost the same between the individual and combined pesticide concentrations, and the DNA damage was more massive with increased pesticide concentration. The DNA damage of 24 h old and 48 h old D. magna did not significantly differ. Increased DNA damage in D. magna indicated that this parameter was sensitive to the presence of pesticides. In application, DNA damage can be used as a biomarker for biomonitoring pesticide pollution in the aquatic ecosystem.
{"title":"Individual and Combined Effects of Pesticides with Active Ingredients of Mancozeb and Methomyl on the DNA Damage of Daphnia magna (Straus, 1820; Cladocera, Daphniidae)","authors":"Rania Nawra Thifali Izdihar, Diah Ariyanti Perdana, Farial Alwaini, A. P. Nugroho","doi":"10.32526/ennrj/21/20230036","DOIUrl":"https://doi.org/10.32526/ennrj/21/20230036","url":null,"abstract":"Mancozeb and methomyl are active ingredients commonly contained in pesticides applied in shallot farming. Surface runoff can carry pesticide residues that enter water bodies and affect non-target organisms, such as Daphnia magna. This study evaluated the genotoxicity effects of individual and combined mancozeb and methomyl on the DNA damage of D. magna. Organisms at 24 h old and 48 h old were exposed to individual and combined concentrations of mancozeb and methomyl for 24 h to obtain the LC50-24 h values. These values were used to evaluate DNA damage by calculating the tail intensity (TI) (%), tail moment (TM), and tail factor (TF). Results showed that based on the LC50-24 h values, methomyl has the highest toxicity level, followed by the mancozeb:methomyl combination, and then mancozeb. The combination index of mancozeb:methomyl for both D. magna ages (24 h and 48 h) indicated that the two pesticides antagonistically interact (CI>1). However, based on TI%, TM, and TF values, the level of damage was almost the same between the individual and combined pesticide concentrations, and the DNA damage was more massive with increased pesticide concentration. The DNA damage of 24 h old and 48 h old D. magna did not significantly differ. Increased DNA damage in D. magna indicated that this parameter was sensitive to the presence of pesticides. In application, DNA damage can be used as a biomarker for biomonitoring pesticide pollution in the aquatic ecosystem.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46446497","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 : 2023-07-01DOI: 10.32526/ennrj/21/20230057
Mouna Boufafa, Fatma Zohra Guellati, Hassen Touati, S. Kadri, M. Bensouilah
This study investigated the bacteriological and physicochemical quality of seawater and sediment samples collected from four sampling sites in the Gulf of Annaba (Northeastern Algeria) over a one-year period. Culture-based techniques were used to quantify and assess Fecal Indicator Bacteria (FIB) and potentially pathogenic bacteria. Additionally, various physicochemical parameters including temperature, pH, salinity, dissolved oxygen, and suspended solids were measured. The results revealed seasonal variations in the physicochemical variables, reflecting the influence of environmental conditions in the research area. The highest concentrations of FIB were observed in samples obtained from Sidi Salem and Rezgui Rachid, indicating a possible association with sewage contamination. Furthermore, the sediments collected from all sites exhibited higher levels of FIB and potentially pathogenic bacteria compared to the seawater samples, particularly during the summer and fall seasons.
{"title":"Bacteriological Assessment of Fecal Contamination in the Sediments of the Gulf of Annaba (Southern Mediterranean): A Preliminary Investigation","authors":"Mouna Boufafa, Fatma Zohra Guellati, Hassen Touati, S. Kadri, M. Bensouilah","doi":"10.32526/ennrj/21/20230057","DOIUrl":"https://doi.org/10.32526/ennrj/21/20230057","url":null,"abstract":"This study investigated the bacteriological and physicochemical quality of seawater and sediment samples collected from four sampling sites in the Gulf of Annaba (Northeastern Algeria) over a one-year period. Culture-based techniques were used to quantify and assess Fecal Indicator Bacteria (FIB) and potentially pathogenic bacteria. Additionally, various physicochemical parameters including temperature, pH, salinity, dissolved oxygen, and suspended solids were measured. The results revealed seasonal variations in the physicochemical variables, reflecting the influence of environmental conditions in the research area. The highest concentrations of FIB were observed in samples obtained from Sidi Salem and Rezgui Rachid, indicating a possible association with sewage contamination. Furthermore, the sediments collected from all sites exhibited higher levels of FIB and potentially pathogenic bacteria compared to the seawater samples, particularly during the summer and fall seasons.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48818727","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 : 2023-06-23DOI: 10.32526/ennrj/21/20230014
Rapeepan Yongyod, Phatcharaporn Phusomya, P. Chopjitt
Consumption of food from food stalls and water from vending machines has recently increased in Sakon Nakon Province, Thailand. This study investigated the microbial quality of food stalls and the sanitation of drinking water distributed through water vending machines. Escherichia coli, Salmonella spp., Staphylococcus aureus, and Vibrio cholerae were detected using polymerase chain reaction. In total, 33 food samples were collected from food stalls and 63 drinking water samples were collected from water vending machines. The results identified E. coli in 6.06% of the food and 11.11% of the drinking water samples. Salmonella spp., S. aureus, and V. cholerae were not detected in any of the food or drinking water samples. Food sanitation assessment indicated 21 (63.64%) of the food stalls did not meet the standards for drinking water as it was not stored in clean and closed containers equipped with a tap or nozzle. Regarding the sanitation of the water vending machines, the businesses failed to inspect the physical, chemical and biological aspects of water quality and never used a simple bacterial test kit to check water quality. It is concluded that the relevant government officials should educate the vender on food safety and hygiene as well as enforcing regular monitoring of the quality of food stall and drinking water vending machines.
{"title":"Microbiological Quality and Sanitation of Food Stalls and Drinking Water Vending Machines","authors":"Rapeepan Yongyod, Phatcharaporn Phusomya, P. Chopjitt","doi":"10.32526/ennrj/21/20230014","DOIUrl":"https://doi.org/10.32526/ennrj/21/20230014","url":null,"abstract":"Consumption of food from food stalls and water from vending machines has recently increased in Sakon Nakon Province, Thailand. This study investigated the microbial quality of food stalls and the sanitation of drinking water distributed through water vending machines. Escherichia coli, Salmonella spp., Staphylococcus aureus, and Vibrio cholerae were detected using polymerase chain reaction. In total, 33 food samples were collected from food stalls and 63 drinking water samples were collected from water vending machines. The results identified E. coli in 6.06% of the food and 11.11% of the drinking water samples. Salmonella spp., S. aureus, and V. cholerae were not detected in any of the food or drinking water samples. Food sanitation assessment indicated 21 (63.64%) of the food stalls did not meet the standards for drinking water as it was not stored in clean and closed containers equipped with a tap or nozzle. Regarding the sanitation of the water vending machines, the businesses failed to inspect the physical, chemical and biological aspects of water quality and never used a simple bacterial test kit to check water quality. It is concluded that the relevant government officials should educate the vender on food safety and hygiene as well as enforcing regular monitoring of the quality of food stall and drinking water vending machines.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44301687","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 : 2023-06-23DOI: 10.32526/ennrj/21/20230002
F. Riyanti, ,. N. , Nurhidayah, W. Purwaningrum, N. Yuliasari, P. Hariani
In this study, MgFe2O4 was successfully synthesized through the coprecipitation method using the precursors Fe(NO3)3·9H2O and Mg(NO3)2·6H2O. The MgFe2O4 product was characterized using XRD, SEM-EDS, VSM, UV-DRS, and FTIR. The catalyst was used for the photocatalytic degradation of Congo red dye under visible light irradiation. The variables of the photocatalytic degradation included solution pH, Congo red concentration, H2O2 concentration, and irradiation time. The MgFe2O4 synthesized has magnetic properties, with a saturation magnetization value of 17.78 emu/g and a band gap of 1.88 eV. A degradation efficiency of 99.62% was achieved under specific conditions, including a Congo red concentration of 10 mg/L, a solution pH of 6, an H2O2 concentration of 2.5 mM, and an irradiation time of 180 min. The degradation efficiency without H2O2 was observed to be 83.45%. The photocatalytic degradation of Congo red followed the pseudo-first-order kinetics model with a rate constant (k) of 0.0167 min-1 and a half-life (t1/2) of 41.49 min. The total organic carbon (TOC) removal of 84.58% indicated that the mineralization of Congo red had occurred. The effectiveness of photocatalytic degradation decreased from 99.62% to 94.50% (<5%) after five cycles of photocatalytic degradation. The results demonstrated that MgFe2O4 has a high Congo red dye degradation efficiency, can be regenerated, and is readily separated from the solution using a permanent magnet.
{"title":"MgFe2O4 Magnetic Catalyst for Photocatalytic Degradation of Congo Red Dye in Aqueous Solution Under Visible Light Irradiation","authors":"F. Riyanti, ,. N. , Nurhidayah, W. Purwaningrum, N. Yuliasari, P. Hariani","doi":"10.32526/ennrj/21/20230002","DOIUrl":"https://doi.org/10.32526/ennrj/21/20230002","url":null,"abstract":"In this study, MgFe2O4 was successfully synthesized through the coprecipitation method using the precursors Fe(NO3)3·9H2O and Mg(NO3)2·6H2O. The MgFe2O4 product was characterized using XRD, SEM-EDS, VSM, UV-DRS, and FTIR. The catalyst was used for the photocatalytic degradation of Congo red dye under visible light irradiation. The variables of the photocatalytic degradation included solution pH, Congo red concentration, H2O2 concentration, and irradiation time. The MgFe2O4 synthesized has magnetic properties, with a saturation magnetization value of 17.78 emu/g and a band gap of 1.88 eV. A degradation efficiency of 99.62% was achieved under specific conditions, including a Congo red concentration of 10 mg/L, a solution pH of 6, an H2O2 concentration of 2.5 mM, and an irradiation time of 180 min. The degradation efficiency without H2O2 was observed to be 83.45%. The photocatalytic degradation of Congo red followed the pseudo-first-order kinetics model with a rate constant (k) of 0.0167 min-1 and a half-life (t1/2) of 41.49 min. The total organic carbon (TOC) removal of 84.58% indicated that the mineralization of Congo red had occurred. The effectiveness of photocatalytic degradation decreased from 99.62% to 94.50% (<5%) after five cycles of photocatalytic degradation. The results demonstrated that MgFe2O4 has a high Congo red dye degradation efficiency, can be regenerated, and is readily separated from the solution using a permanent magnet.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49664919","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 : 2023-06-07DOI: 10.32526/ennrj/21/202200273
K. Khatri, S. Gurung, B. Jha, Milina Sthapit, U. Khadka
Inter Basin Water Transfer (IBWT) is a water resource stressor globally with negative environmental impacts. This study describes the major ions and hydrochemistry of the first ever ongoing IBWT from snow-fed Bheri River to rain-fed Babai River in Western Nepal. Water samples from 10 sites, five from each river system, were collected in HDPE bottles for major ions (Ca^(2+), Mg^(2+), Na^+, K^+, HCO_3^-, Cl^-, SO_4^(2-), NO_3^-, CO_3^(2-)) along with the estimation of pH, temperature and conductivity encompassing winter, spring, summer, and autumn in 2018. Ca^(2+)and HCO_3^- were the most dominant cation and anion, respectively, with 〖Ca-Mg-HCO〗_3 water type in both the river systems. Mann Whitney test revealed significant variation (p<0.05) between the two river systems with regard to Ca^(2+), Mg^(2+), HCO_3^- , and SO_4^(2-). Kruskall Wallis test revealed significant variations between seasons in pH, temperature, Na^+, K^+, and Cl^- in Bheri River system, and in pH, TDS, temperature, Na^+, K^+ , Cl^- and SO_4^(2-) in Babai River system. Carbonate weathering was the main mechanism of ionic sources with insignificant contribution from silicate weathering. Relatively higher concentrations of the major ions during the dry seasons probably indicate the dilution effect of monsoon. Higher concentrations of the ions in the Babai River system reflect the latter’s bedrock geology with susceptibility to erosion. With Nepal’s future plans of IBWTs and their environmental implications, this finding could be helpful in mitigating the negative consequences of IBWTs in the impact assessment and management of IBWT projects because of their implications on management of aquatic resources.
{"title":"Major Ion Chemistry of the Bheri (Snow-Fed) and the Babai (Rain-Fed) River Systems in Western Nepal: Implication on Water Quality","authors":"K. Khatri, S. Gurung, B. Jha, Milina Sthapit, U. Khadka","doi":"10.32526/ennrj/21/202200273","DOIUrl":"https://doi.org/10.32526/ennrj/21/202200273","url":null,"abstract":"Inter Basin Water Transfer (IBWT) is a water resource stressor globally with negative environmental impacts. This study describes the major ions and hydrochemistry of the first ever ongoing IBWT from snow-fed Bheri River to rain-fed Babai River in Western Nepal. Water samples from 10 sites, five from each river system, were collected in HDPE bottles for major ions (Ca^(2+), Mg^(2+), Na^+, K^+, HCO_3^-, Cl^-, SO_4^(2-), NO_3^-, CO_3^(2-)) along with the estimation of pH, temperature and conductivity encompassing winter, spring, summer, and autumn in 2018. Ca^(2+)and HCO_3^- were the most dominant cation and anion, respectively, with 〖Ca-Mg-HCO〗_3 water type in both the river systems. Mann Whitney test revealed significant variation (p<0.05) between the two river systems with regard to Ca^(2+), Mg^(2+), HCO_3^- , and SO_4^(2-). Kruskall Wallis test revealed significant variations between seasons in pH, temperature, Na^+, K^+, and Cl^- in Bheri River system, and in pH, TDS, temperature, Na^+, K^+ , Cl^- and SO_4^(2-) in Babai River system. Carbonate weathering was the main mechanism of ionic sources with insignificant contribution from silicate weathering. Relatively higher concentrations of the major ions during the dry seasons probably indicate the dilution effect of monsoon. Higher concentrations of the ions in the Babai River system reflect the latter’s bedrock geology with susceptibility to erosion. With Nepal’s future plans of IBWTs and their environmental implications, this finding could be helpful in mitigating the negative consequences of IBWTs in the impact assessment and management of IBWT projects because of their implications on management of aquatic resources.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41363689","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 : 2023-05-23DOI: 10.32526/ennrj/21/20230006
Nattawat Siwapathomchai, N. Aimyong, W. Patthanaissaranukool, Tanasri Sihabut
This study investigated factors associated with road traffic noise and residents’ annoyance from three distinct types of roads (major arterial, minor arterial, and collector roads). Nine sampling locations in Thailand’s Nakorn Pathom Province were chosen for the measurement of noise levels and three contributing characteristics: traffic volume, vehicle speed, and the proportion of heavy to total vehicles. Along with a housing survey, face to face interviews with a total of 387 roadside dwellers recorded their sociodemographic data, activity-based locations, and noise impacts experienced. A statistical analysis based on Spearman correlation revealed a positive relationship between traffic volume and traffic noise level on major arterial (r=0.607) and collector roads (r=0.885). Residents around collector roads were more sensitive than those along the main arterial road, in spite of having lower noise levels and less intense traffic patterns. Longer housing setbacks appeared to be a key factor in reducing noise annoyance from all road types, according to an exact logistic regression analysis (OR=0.11, 95% CI: 0.003, 0.73 for the major arterial road; OR=0.29, 95% CI: 0.10, 0.78 for the minor arterial road; and OR=0.32, 95% CI: 0.12, 0.84 for collector roads). However, performing activities in closed areas (OR=0.05, 95% CI: 0.01, 0.17 for the minor arterial road; OR=0.22, 95% CI: 0.54, 0.90 for collector roads) and living in soundproof structures (OR=0.05, 95% CI: 0.001, 0.31 for collector roads) played additional roles to reduce the annoyance of residents along the roads with shorter setback lines.
{"title":"Factors Affecting Traffic Noise and Annoyance from Different Types of Roads: A Case Study in Nakorn Pathom Province, Thailand","authors":"Nattawat Siwapathomchai, N. Aimyong, W. Patthanaissaranukool, Tanasri Sihabut","doi":"10.32526/ennrj/21/20230006","DOIUrl":"https://doi.org/10.32526/ennrj/21/20230006","url":null,"abstract":"This study investigated factors associated with road traffic noise and residents’ annoyance from three distinct types of roads (major arterial, minor arterial, and collector roads). Nine sampling locations in Thailand’s Nakorn Pathom Province were chosen for the measurement of noise levels and three contributing characteristics: traffic volume, vehicle speed, and the proportion of heavy to total vehicles. Along with a housing survey, face to face interviews with a total of 387 roadside dwellers recorded their sociodemographic data, activity-based locations, and noise impacts experienced. A statistical analysis based on Spearman correlation revealed a positive relationship between traffic volume and traffic noise level on major arterial (r=0.607) and collector roads (r=0.885). Residents around collector roads were more sensitive than those along the main arterial road, in spite of having lower noise levels and less intense traffic patterns. Longer housing setbacks appeared to be a key factor in reducing noise annoyance from all road types, according to an exact logistic regression analysis (OR=0.11, 95% CI: 0.003, 0.73 for the major arterial road; OR=0.29, 95% CI: 0.10, 0.78 for the minor arterial road; and OR=0.32, 95% CI: 0.12, 0.84 for collector roads). However, performing activities in closed areas (OR=0.05, 95% CI: 0.01, 0.17 for the minor arterial road; OR=0.22, 95% CI: 0.54, 0.90 for collector roads) and living in soundproof structures (OR=0.05, 95% CI: 0.001, 0.31 for collector roads) played additional roles to reduce the annoyance of residents along the roads with shorter setback lines.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47200086","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 : 2023-05-19DOI: 10.32526/ennrj/21/20230035
Nhung C. Vu, T. Ngo‐Duc
This study investigates the spatial distribution and trend of heat stress in Vietnam using data from 68 meteorological stations across the country’s seven climatic sub-regions between 1979 and 2018. Daily maximum wet-bulb temperature (TWmax), an indicator of heat stress, was computed based on the daily maximum air temperature (Tx) and relative humidity at 13:00 LST (RH13). Results indicate a strong positive correlation (>0.97) between daily TWmax and Tx and a weaker relationship between daily TWmax and RH13. Tx and TWmax experienced a general increasing trend across most stations over the study period, while RH13 displayed both negative and positive trends. Vietnam’s heat stress thresholds were found to be higher than those in many other parts of the world due to the country’s location and its temperature-humidity conditions. The study identifies most parts of Vietnam have experienced an increase in heat stress days, typically ranging from 5 to 12 days per decade. Among the four seasons, summer contributed the most (50-80%) to the annual number of heat stress days in most sub-regions, except for the Central Highlands and the South where spring had the highest contribution (65-80%). Overall, this study provides useful benchmark values for future research on heat stress in Vietnam.
{"title":"Spatial Distribution and Trends of Heat Stress in Vietnam","authors":"Nhung C. Vu, T. Ngo‐Duc","doi":"10.32526/ennrj/21/20230035","DOIUrl":"https://doi.org/10.32526/ennrj/21/20230035","url":null,"abstract":"This study investigates the spatial distribution and trend of heat stress in Vietnam using data from 68 meteorological stations across the country’s seven climatic sub-regions between 1979 and 2018. Daily maximum wet-bulb temperature (TWmax), an indicator of heat stress, was computed based on the daily maximum air temperature (Tx) and relative humidity at 13:00 LST (RH13). Results indicate a strong positive correlation (>0.97) between daily TWmax and Tx and a weaker relationship between daily TWmax and RH13. Tx and TWmax experienced a general increasing trend across most stations over the study period, while RH13 displayed both negative and positive trends. Vietnam’s heat stress thresholds were found to be higher than those in many other parts of the world due to the country’s location and its temperature-humidity conditions. The study identifies most parts of Vietnam have experienced an increase in heat stress days, typically ranging from 5 to 12 days per decade. Among the four seasons, summer contributed the most (50-80%) to the annual number of heat stress days in most sub-regions, except for the Central Highlands and the South where spring had the highest contribution (65-80%). Overall, this study provides useful benchmark values for future research on heat stress in Vietnam.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42070091","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 : 2023-05-01DOI: 10.32526/ennrj/21/202200271
Jobelle Capilitan, Abigael Balbin, I. Tabañag, E. Taboada
Mining activity always presents threats to soil and water pollution. As an extractive industry, it disturbs the ground and the biodiversity associated with soil and plants. Its operations have led to severe geological and environmental problems, including the depletion of land and water resources, geological dangers, and ecological landscape devastation that may have accelerated the desertification of mining areas. This case study analyzed the soil’s physical and chemical properties in a nickel laterite mine, including soil erodibility K factor, soil pH, and heavy metal accumulation, as a basis for establishing mine management protocol during and post-mining operations in Tubay, Agusan del Norte, Philippines. Results determined a slightly alkaline pH level. An estimate of soil erodibility ranging from 0.016 to 0.066 was determined using the USLE-K factor, with the highest erodibility at Mine 7, where % silt is high and % sand is lowest. X-ray fluorescence (XRF) spectroscopy was used to analyze soil samples. The findings show that Ni, Fe, Co, and Mn in the soil were above the WHO-permitted limits. The surface soil had mean values of 9,239 ppm for nickel, 302,618 ppm for iron, 639 ppm for cobalt, and 5,203 for manganese. Heavy metals in soil may be consumed by crops and pollute land and water.
{"title":"Examining Soil Erodibility, Soil pH, and Heavy Metal Accumulation in a Nickel Ore Mine: A Case Study in Tubay, Agusan del Norte, Philippines","authors":"Jobelle Capilitan, Abigael Balbin, I. Tabañag, E. Taboada","doi":"10.32526/ennrj/21/202200271","DOIUrl":"https://doi.org/10.32526/ennrj/21/202200271","url":null,"abstract":"Mining activity always presents threats to soil and water pollution. As an extractive industry, it disturbs the ground and the biodiversity associated with soil and plants. Its operations have led to severe geological and environmental problems, including the depletion of land and water resources, geological dangers, and ecological landscape devastation that may have accelerated the desertification of mining areas. This case study analyzed the soil’s physical and chemical properties in a nickel laterite mine, including soil erodibility K factor, soil pH, and heavy metal accumulation, as a basis for establishing mine management protocol during and post-mining operations in Tubay, Agusan del Norte, Philippines. Results determined a slightly alkaline pH level. An estimate of soil erodibility ranging from 0.016 to 0.066 was determined using the USLE-K factor, with the highest erodibility at Mine 7, where % silt is high and % sand is lowest. X-ray fluorescence (XRF) spectroscopy was used to analyze soil samples. The findings show that Ni, Fe, Co, and Mn in the soil were above the WHO-permitted limits. The surface soil had mean values of 9,239 ppm for nickel, 302,618 ppm for iron, 639 ppm for cobalt, and 5,203 for manganese. Heavy metals in soil may be consumed by crops and pollute land and water.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42598864","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 : 2023-04-28DOI: 10.32526/ennrj/21/202200264
M. Nesha, Z. Fardous, H. Islam, Priyanka Das Pinkey, Md. Abdur Rahman, M. A. Chowdhury
Safe and clean water is an indispensable component for all kinds of living beings. An attempt was taken to examine the drinking water, particularly the groundwater quality of Savar Upazila under the Dhaka District of Bangladesh by assessing some physicochemical parameters such as pH, total dissolved solids (TDS), electrical conductivity (EC), and temperature and the levels of different heavy metals (Cu, Cd, Cr, Fe, Mn, and Zn). To measure the concentration of the six selected metals from the groundwater samples collected from 38 different locations of Savar Upazila, Atomic Absorption Spectrophotometry (AAS) was used. Our results showed that the pH, TDS, EC, and temperature ranged from (6.56-7.72), (73-437 mg/L), (117-654 µS/cm), and (27.7-30.5ºC), respectively which were found within the limit of water standards recommended by national and global regulatory authorities. The mean concentration of different studied metals in the reported water samples of Savar Upazila followed the order of Fe > Zn > Mn > Cr > Cu > Cd. The average concentration was 0.136±0.188 mg/L, 0.121±0.289 mg/L, 0.033±0.060 mg/L, 0.015±0.0096 mg/L, 0.0104±0.005 mg/L, and 0.0022±0.0019 mg/L for Fe, Zn, Mn, Cr, Cu, and Cd, respectively. In this study, Water quality index (WQI) was also calculated for the studied samples and it was observed that the groundwater of Savar Upazila belonged in the good to excellent categories and can be recommended as suitable for drinking purposes.
{"title":"Investigation of Some Physicochemical Parameters and Heavy Metals for Monitoring the Groundwater Quality of Savar Upazila of Dhaka, Bangladesh","authors":"M. Nesha, Z. Fardous, H. Islam, Priyanka Das Pinkey, Md. Abdur Rahman, M. A. Chowdhury","doi":"10.32526/ennrj/21/202200264","DOIUrl":"https://doi.org/10.32526/ennrj/21/202200264","url":null,"abstract":"Safe and clean water is an indispensable component for all kinds of living beings. An attempt was taken to examine the drinking water, particularly the groundwater quality of Savar Upazila under the Dhaka District of Bangladesh by assessing some physicochemical parameters such as pH, total dissolved solids (TDS), electrical conductivity (EC), and temperature and the levels of different heavy metals (Cu, Cd, Cr, Fe, Mn, and Zn). To measure the concentration of the six selected metals from the groundwater samples collected from 38 different locations of Savar Upazila, Atomic Absorption Spectrophotometry (AAS) was used. Our results showed that the pH, TDS, EC, and temperature ranged from (6.56-7.72), (73-437 mg/L), (117-654 µS/cm), and (27.7-30.5ºC), respectively which were found within the limit of water standards recommended by national and global regulatory authorities. The mean concentration of different studied metals in the reported water samples of Savar Upazila followed the order of Fe > Zn > Mn > Cr > Cu > Cd. The average concentration was 0.136±0.188 mg/L, 0.121±0.289 mg/L, 0.033±0.060 mg/L, 0.015±0.0096 mg/L, 0.0104±0.005 mg/L, and 0.0022±0.0019 mg/L for Fe, Zn, Mn, Cr, Cu, and Cd, respectively. In this study, Water quality index (WQI) was also calculated for the studied samples and it was observed that the groundwater of Savar Upazila belonged in the good to excellent categories and can be recommended as suitable for drinking purposes.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44097193","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 : 2023-04-21DOI: 10.32526/ennrj/21/202200270
Jiraphan Chotiratanasak, T. Vitidsant, Maneerat Khemkhao
Globally, there is growing concern about the problem of plastic waste. The majority of plastic waste is dumped into landfills, where it occupies space, reducing landfill capacity and causing a variety of environmental issues. Plastic waste pyrolysis has gained popularity because it can reduce the volume of plastic waste while also producing alternative fuels. This study assessed the feasibility of producing fuel oil from plastic waste using the catalytic pyrolysis process. Polyethylene (PE), polypropylene (PP), and polystyrene (PS) waste samples were collected from municipal solid waste (MSW) landfills on Samui Island, Surat Thani Province, Thailand. Pyrolysis was carried out in a 3-L bench-scale reactor at 450ºC using a 3% spent FCC catalyst. PE, PP, PS, and mixed plastic waste were used as feedstocks. The results showed that the pyrolysis of PS produced the most liquid product (91.44 wt%), whereas the pyrolysis of PE produced the highest percentage of diesel range product (36.60 wt%). Furthermore, the results of the analysis revealed that the characteristics of diesel from improved PE pyrolysis oil by naphtha removal were similar to those of commercial diesel B7. According to the cost-benefit analysis, the operating costs of pyrolysis oil and improved diesel were 0.37 and 0.65 USD/L, respectively, which were lower than the current market price of diesel B7. The findings of the study demonstrated the feasibility of converting plastic waste from MSW on Samui Island into alternative energy using eco-friendly and cost-effective technology.
{"title":"Feasibility Study of Plastic Waste Pyrolysis from Municipal Solid Waste Landfill with Spent FCC Catalyst","authors":"Jiraphan Chotiratanasak, T. Vitidsant, Maneerat Khemkhao","doi":"10.32526/ennrj/21/202200270","DOIUrl":"https://doi.org/10.32526/ennrj/21/202200270","url":null,"abstract":"Globally, there is growing concern about the problem of plastic waste. The majority of plastic waste is dumped into landfills, where it occupies space, reducing landfill capacity and causing a variety of environmental issues. Plastic waste pyrolysis has gained popularity because it can reduce the volume of plastic waste while also producing alternative fuels. This study assessed the feasibility of producing fuel oil from plastic waste using the catalytic pyrolysis process. Polyethylene (PE), polypropylene (PP), and polystyrene (PS) waste samples were collected from municipal solid waste (MSW) landfills on Samui Island, Surat Thani Province, Thailand. Pyrolysis was carried out in a 3-L bench-scale reactor at 450ºC using a 3% spent FCC catalyst. PE, PP, PS, and mixed plastic waste were used as feedstocks. The results showed that the pyrolysis of PS produced the most liquid product (91.44 wt%), whereas the pyrolysis of PE produced the highest percentage of diesel range product (36.60 wt%). Furthermore, the results of the analysis revealed that the characteristics of diesel from improved PE pyrolysis oil by naphtha removal were similar to those of commercial diesel B7. According to the cost-benefit analysis, the operating costs of pyrolysis oil and improved diesel were 0.37 and 0.65 USD/L, respectively, which were lower than the current market price of diesel B7. The findings of the study demonstrated the feasibility of converting plastic waste from MSW on Samui Island into alternative energy using eco-friendly and cost-effective technology.","PeriodicalId":11784,"journal":{"name":"Environment and Natural Resources Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45127535","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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