In this study, 16 children’s products with the highest detection potential of phthalates were selected, and a phthalate assay and transdermal delivery analysis (NIER, US EPA Wipe [stress condition], US EPA Wipe [physiological condition], and US EPA Hand Wipe) were conducted with these products. The content of 6 controlled phthalates (DBP, BBP, DEHP, DNOP, DINP, and DIDP) was measured and most products contained more phthalates than the regulated guidelines (a total content of 6 phthalates to be ≤0.1%). For transdermal delivery, all items were found to be lower in the NIER transdermal delivery test method compared to the US EPA Hand Wipe (stress condition and physiological condition) transdermal delivery test method. For the US EPA Hand Wipe (stress condition and physiological condition) transdermal delivery test method, a similar result was observed, except for DINP. The average daily dose (ADD) estimated by determining the exposure algorithm for each transdermal delivery test method was highest in mats with a large contacting surface area and a long exposure time in the respective test methods. Conclusively, there was a difference between the NIER transdermal delivery test method and the US EPA Wipe transdermal delivery test method.
本研究选取了16种邻苯二甲酸盐检测潜力最高的儿童产品，对这些产品进行邻苯二甲酸盐测定和透皮给药分析(NIER、US EPA Wipe[应激状态]、US EPA Wipe[生理状态]和US EPA Hand Wipe)。测定了6种受控邻苯二甲酸酯(DBP、BBP、DEHP、DNOP、DINP和DIDP)的含量，大多数产品的邻苯二甲酸酯含量超过了规定的标准(6种邻苯二甲酸酯的总含量≤0.1%)。对于透皮给药，与美国EPA Hand Wipe(应激状态和生理状态)透皮给药测试方法相比，NIER透皮给药测试方法中所有项目都较低。对于美国EPA Hand Wipe(应激状态和生理状态)透皮给药试验方法，除了DINP外，观察到类似的结果。通过确定每种透皮给药试验方法的暴露算法估计的平均日剂量(ADD)在各自试验方法中接触表面积大、暴露时间长的垫子中最高。最后，NIER透皮给药试验方法与美国EPA Wipe透皮给药试验方法存在差异。
{"title":"Evaluation of transdermal exposure of phthalates in children’s products","authors":"Jihye Hwang, Young-Wook Lim, Ji-Yeon Yang, Dong-chun Shin","doi":"10.5620/eaht.2022005","DOIUrl":"https://doi.org/10.5620/eaht.2022005","url":null,"abstract":"In this study, 16 children’s products with the highest detection potential of phthalates were selected, and a phthalate assay and transdermal delivery analysis (NIER, US EPA Wipe [stress condition], US EPA Wipe [physiological condition], and US EPA Hand Wipe) were conducted with these products. The content of 6 controlled phthalates (DBP, BBP, DEHP, DNOP, DINP, and DIDP) was measured and most products contained more phthalates than the regulated guidelines (a total content of 6 phthalates to be ≤0.1%). For transdermal delivery, all items were found to be lower in the NIER transdermal delivery test method compared to the US EPA Hand Wipe (stress condition and physiological condition) transdermal delivery test method. For the US EPA Hand Wipe (stress condition and physiological condition) transdermal delivery test method, a similar result was observed, except for DINP. The average daily dose (ADD) estimated by determining the exposure algorithm for each transdermal delivery test method was highest in mats with a large contacting surface area and a long exposure time in the respective test methods. Conclusively, there was a difference between the NIER transdermal delivery test method and the US EPA Wipe transdermal delivery test method.","PeriodicalId":101307,"journal":{"name":"Environmental analysis, health and toxicology","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77445399","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}
Genotoxicity and oxidative stress potential of Ajakanga Landfill Leachate (ALL) were investigated in this study. Forty-two male albino rats of the Wistar strain (100 g and 150 g) were divided equally into six groups. Group A (control) animals were given distilled water as drinking water for forty-five days; while groups B-F animals were exposed to 12.5%, 25%, 50%, 75% and 100% leachate respectively via drinking water for forty-five days. The effect of the leachate was assessed on markers of oxidative stress in the liver, kidney and testes of rats; markers of liver function (Alanine aminotransferase (ALT) and Aspartate aminotransferase (AST) were determined in the serum and the genotoxic effect of the leachate was investigated using micronucleus assay. Physicochemical and heavy metal analysis were also carried out on the leachate sample. Exposure to ALL resulted in increase in the activities of ALT and AST. A significant increase in malondialdehyde level as well as alterations in antioxidant status was observed in the liver, kidney and testes of the rats compared with control. There was also significant increase in micronuclei formation in the bone marrow of rats exposed to the leachate. Physicochemical and heavy metal analysis of the leachate revealed the presence of some heavy metals at high concentrations as well as other toxic constituents and the total number of active bacteria in the leachate sample were also high. In conclusion, ALL induced oxidative stress and genotoxicity in rats. This suggests that the leachate may be toxic to humans if exposure occurs.
{"title":"Evaluation of genotoxic and oxidative stress potential of Ajakanga Landfill Leachate in rats","authors":"O. Arojojoye, O. Nwaechefu, Samuel C. Nkwadinamor","doi":"10.5620/eaht.2022004","DOIUrl":"https://doi.org/10.5620/eaht.2022004","url":null,"abstract":"Genotoxicity and oxidative stress potential of Ajakanga Landfill Leachate (ALL) were investigated in this study. Forty-two male albino rats of the Wistar strain (100 g and 150 g) were divided equally into six groups. Group A (control) animals were given distilled water as drinking water for forty-five days; while groups B-F animals were exposed to 12.5%, 25%, 50%, 75% and 100% leachate respectively via drinking water for forty-five days. The effect of the leachate was assessed on markers of oxidative stress in the liver, kidney and testes of rats; markers of liver function (Alanine aminotransferase (ALT) and Aspartate aminotransferase (AST) were determined in the serum and the genotoxic effect of the leachate was investigated using micronucleus assay. Physicochemical and heavy metal analysis were also carried out on the leachate sample. Exposure to ALL resulted in increase in the activities of ALT and AST. A significant increase in malondialdehyde level as well as alterations in antioxidant status was observed in the liver, kidney and testes of the rats compared with control. There was also significant increase in micronuclei formation in the bone marrow of rats exposed to the leachate. Physicochemical and heavy metal analysis of the leachate revealed the presence of some heavy metals at high concentrations as well as other toxic constituents and the total number of active bacteria in the leachate sample were also high. In conclusion, ALL induced oxidative stress and genotoxicity in rats. This suggests that the leachate may be toxic to humans if exposure occurs.","PeriodicalId":101307,"journal":{"name":"Environmental analysis, health and toxicology","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87032838","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}
A. Kazemifar, A. Shafikhani, H. Mozhdehipanah, S. Khamesi, M. Arami
Evidence suggests that the relationship between arsenic metabolism and diseases, including metabolic syndrome, is complex. The aim of this study was to evaluate the different types of arsenic methylation and its association with metabolic syndrome in an arsenic endemic area. A cross-sectional study was conducted on 132 subjects from Shahid-Abad Village, Qazvin province, Iran (arsenic endemic area). Demographic characteristics, metabolic syndrome, and urinary arsenic species, including iAs (inorganic arsenic), MMA (monomethylarsonic acid), and DMA (dimethylarsinic acid) were measured for all patients and their relationship was analyzed by appropriate statistical methods. In this study, 34.5% of the participants had metabolic syndrome. The decrease in %MMA, increase in %DMA and increase in secondary methylation index (DMA/MMA) were associated with increased risk of metabolic syndrome (p<0.05). We did not find any association between the incidence of metabolic syndrome with primary methylation index (MMA/iAs) and %iAs (p>0.05). This study showed that the prevalence of metabolic syndrome was significantly higher in people with metabolic syndrome than in the general population. A closer examination revealed that the secondary methylation index is related to the metabolic syndrome and its components. Given the higher prevalence of cardiovascular disease and diabetes in patients with metabolic syndrome, it is necessary to change the pathogenesis of the disease using comprehensive management methods for decreasing patient complications.
{"title":"Evaluation of different types of arsenic methylation and its relationship with metabolic syndrome in an area chronically exposed to arsenic.","authors":"A. Kazemifar, A. Shafikhani, H. Mozhdehipanah, S. Khamesi, M. Arami","doi":"10.5620/eaht.2020006","DOIUrl":"https://doi.org/10.5620/eaht.2020006","url":null,"abstract":"Evidence suggests that the relationship between arsenic metabolism and diseases, including metabolic syndrome, is complex. The aim of this study was to evaluate the different types of arsenic methylation and its association with metabolic syndrome in an arsenic endemic area. A cross-sectional study was conducted on 132 subjects from Shahid-Abad Village, Qazvin province, Iran (arsenic endemic area). Demographic characteristics, metabolic syndrome, and urinary arsenic species, including iAs (inorganic arsenic), MMA (monomethylarsonic acid), and DMA (dimethylarsinic acid) were measured for all patients and their relationship was analyzed by appropriate statistical methods. In this study, 34.5% of the participants had metabolic syndrome. The decrease in %MMA, increase in %DMA and increase in secondary methylation index (DMA/MMA) were associated with increased risk of metabolic syndrome (p<0.05). We did not find any association between the incidence of metabolic syndrome with primary methylation index (MMA/iAs) and %iAs (p>0.05). This study showed that the prevalence of metabolic syndrome was significantly higher in people with metabolic syndrome than in the general population. A closer examination revealed that the secondary methylation index is related to the metabolic syndrome and its components. Given the higher prevalence of cardiovascular disease and diabetes in patients with metabolic syndrome, it is necessary to change the pathogenesis of the disease using comprehensive management methods for decreasing patient complications.","PeriodicalId":101307,"journal":{"name":"Environmental analysis, health and toxicology","volume":"17 1","pages":"2020006-0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90316794","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}
N. E. Muze, Alexander Iheanyichukwu Opara, F. Ibe, O. C. Njoku
Geo-environmental assessment of activities of auto-mechanics at Alaoji Aba and Elekahia Port Harcourt, both in the Niger Delta region, Southern Nigeria were carried out with the main objective of determining the extent of soil contamination arising from anthropogenic activities within mechanic villages (MVs). Geochemical analysis of soil samples from the study area revealed that the concentrations of the trace metals ranged from <1 mg/kg for chromium (Cr) to 1,925 mg/kg for the lead (Pb). Soil analysis for polycyclic aromatic hydrocarbon (PAH) and total petroleum hydrocarbon (TPH) across the area revealed concentrations ranging from <0.02 to 1.80 mg/Kg and from <1.00 to 38,327 mg/kg respectively. Elevated levels of the heavy metals and TPH were observed at MV in Alaoji Aba when compared to MV in Elekahia Port Harcourt, and the control sites. These could be attributed to contamination due to the presence of these auto-mechanics in the area for over thirty years. The concentration of Pb and Cd recorded in some sample points were above USEPA (United State Environmental Protection Agency) and the National Environmental Standards and Regulations Enforcement Agency (NESREA) permissible limits. Results of PAH analysis showed the presence of naphthalene, phenanthrene, pyrene, fluorene, benzo(a)anthracene, acenaphthene, methylnaphthalene. Risk assessment analysis showed significant geo-accumulation values for Cd and Pb indicating heavy contamination. The monomial risk factor of the heavy metals in the MVs are in the order Cd>Pb>Cr, while potential ecological risk index analysis showed values indicating very high risk, considerable risk and a moderate risk to the area under study as well as the surrounding environment. These results suggest that the soils from the MVs which represent the mechanic workshops at Alaoji Aba and Elekahia Port Harcourt are considered to be of pollution concern due to elevated Pb and Cd levels. Hence, there is a serious need to regularly monitor the activities of auto-mechanics in the study area.
对尼日利亚南部尼日尔三角洲地区的Alaoji Aba和Elekahia Port Harcourt的汽车修理工活动进行了地质环境评估，主要目的是确定机械村(MVs)内人为活动引起的土壤污染程度。研究区土壤样品的地球化学分析表明，研究区土壤中微量金属的浓度范围为Pb>Cr，潜在生态风险指数分析显示，研究区及周边环境存在极高、相当和中等风险。这些结果表明，代表阿劳吉阿坝和埃莱卡希亚港哈考特机械车间的农场土壤由于铅和Cd水平升高而被认为是污染问题。因此，有一个严重的需要定期监测在研究领域的自动机械师的活动。
{"title":"Assessment of the geo-environmental effects of activities of auto-mechanic workships at Alaoji Aba and Elekahia Port Harcourt, Niger Delta, Nigeria.","authors":"N. E. Muze, Alexander Iheanyichukwu Opara, F. Ibe, O. C. Njoku","doi":"10.5620/eaht.2020005","DOIUrl":"https://doi.org/10.5620/eaht.2020005","url":null,"abstract":"Geo-environmental assessment of activities of auto-mechanics at Alaoji Aba and Elekahia Port Harcourt, both in the Niger Delta region, Southern Nigeria were carried out with the main objective of determining the extent of soil contamination arising from anthropogenic activities within mechanic villages (MVs). Geochemical analysis of soil samples from the study area revealed that the concentrations of the trace metals ranged from <1 mg/kg for chromium (Cr) to 1,925 mg/kg for the lead (Pb). Soil analysis for polycyclic aromatic hydrocarbon (PAH) and total petroleum hydrocarbon (TPH) across the area revealed concentrations ranging from <0.02 to 1.80 mg/Kg and from <1.00 to 38,327 mg/kg respectively. Elevated levels of the heavy metals and TPH were observed at MV in Alaoji Aba when compared to MV in Elekahia Port Harcourt, and the control sites. These could be attributed to contamination due to the presence of these auto-mechanics in the area for over thirty years. The concentration of Pb and Cd recorded in some sample points were above USEPA (United State Environmental Protection Agency) and the National Environmental Standards and Regulations Enforcement Agency (NESREA) permissible limits. Results of PAH analysis showed the presence of naphthalene, phenanthrene, pyrene, fluorene, benzo(a)anthracene, acenaphthene, methylnaphthalene. Risk assessment analysis showed significant geo-accumulation values for Cd and Pb indicating heavy contamination. The monomial risk factor of the heavy metals in the MVs are in the order Cd>Pb>Cr, while potential ecological risk index analysis showed values indicating very high risk, considerable risk and a moderate risk to the area under study as well as the surrounding environment. These results suggest that the soils from the MVs which represent the mechanic workshops at Alaoji Aba and Elekahia Port Harcourt are considered to be of pollution concern due to elevated Pb and Cd levels. Hence, there is a serious need to regularly monitor the activities of auto-mechanics in the study area.","PeriodicalId":101307,"journal":{"name":"Environmental analysis, health and toxicology","volume":"23 1","pages":"2020005-0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72989475","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}
Concurrent occurrence of chromium (Cr), copper (Cu) and arsenic (As) from chromated copper arsenate (CCA) wood preservative in aquatic ecosystems demands that their joint-actions in eliciting toxic effects be assessed for adequate understanding of the health risk they may pose to biota. Clarias gariepinus was exposed to As2O3 , CrO3 and CuO and their composite mixtures (1:1 and 1:1:1) at various concentrations (0 – 600 mg/L) for 96-h to determine the acute toxicity using OECD (1992) protocol. C. gariepinus was then exposed to sub-lethal concentrations corresponding to 6.25, 12.5, 25.0, 50.0 and 100% of the 96-h LC50 for 7 days to assess the cytogenotoxic effects using piscine micronucleus (MN) test. The 96-h LC50 showed that the metals/metalloid demonstrated differential interactions in a concentration dependent pattern. The 96-h LC50 showed that Cr was the most toxic while Cu and As:Cu were indeterminate (Cr > Cr:Cu > As:Cr > As > As:Cr:Cu > Cu = As:Cu indeterminate). Isobologram and synergistic ratio (SR) models predicted antagonistic interaction between Cu:Cr and As:Cr and synergism between As:Cu in the causation of morbidity and mortality of C. gariepinus. Interaction factor model predicted antagonism as common interactive mechanism among the metal/metalloid mixtures in the induction of MN and abnormal nuclear erythrocytes in C. gariepinus. Predicted interactions among the three metals/ metalloid were largely antagonism and synergism towards the induction of acute toxicity and cytogenotoxicity. The models employed herein may be useful in establishing environmental safe limits for mixtures of metals/metalloids against the induction of acute toxicity and DNA damage in lower aquatic vertebrates.
铬化砷酸铜(CCA)木材防腐剂在水生生态系统中同时存在铬(Cr)、铜(Cu)和砷(As)，需要评估它们在引发毒性效应方面的联合作用，以充分了解它们可能对生物群构成的健康风险。采用OECD(1992)方案，将不同浓度(0 - 600 mg/L)的As2O3、CrO3和CuO及其复合混合物(1:1和1:1:1)暴露于Clarias gariepinus中96小时，以确定其急性毒性。分别以96 h LC50的6.25、12.5、25.0、50.0和100%亚致死浓度对加里滨棘鱼进行7 d的细胞基因毒性试验。96 h LC50表明，金属/类金属表现出浓度依赖模式的差异相互作用。96 h LC50显示Cr毒性最大，Cu和As:Cu不确定(Cr > Cr:Cu > As:Cr > As > As:Cr:Cu > Cu = As:Cu不确定)。等线图和协同比(SR)模型预测了Cu:Cr和As:Cr之间的拮抗相互作用以及As:Cu之间的协同作用在引起加里平螺旋体发病和死亡中的作用。相互作用因子模型预测了金属/类金属混合物在诱导鸡淋巴细胞MN和核红细胞异常中的共同相互作用机制为拮抗。预测三种金属/类金属之间的相互作用主要是拮抗和协同作用，以诱导急性毒性和细胞遗传毒性。本文采用的模型可能有助于建立金属/类金属混合物的环境安全限值，以防止在低等水生脊椎动物中诱发急性毒性和DNA损伤。
{"title":"Experimental modeling of the acute toxicity and cytogenotoxic fate of composite mixtures of chromate, copper and arsenate oxides associated with CCA preservative using Clarias gariepinus (Burchell 1822)","authors":"Olukunle S. Fagbenro, C. Alimba, A. A. Bakare","doi":"10.5620/eaht.e2019010","DOIUrl":"https://doi.org/10.5620/eaht.e2019010","url":null,"abstract":"Concurrent occurrence of chromium (Cr), copper (Cu) and arsenic (As) from chromated copper arsenate (CCA) wood preservative in aquatic ecosystems demands that their joint-actions in eliciting toxic effects be assessed for adequate understanding of the health risk they may pose to biota. Clarias gariepinus was exposed to As2O3 , CrO3 and CuO and their composite mixtures (1:1 and 1:1:1) at various concentrations (0 – 600 mg/L) for 96-h to determine the acute toxicity using OECD (1992) protocol. C. gariepinus was then exposed to sub-lethal concentrations corresponding to 6.25, 12.5, 25.0, 50.0 and 100% of the 96-h LC50 for 7 days to assess the cytogenotoxic effects using piscine micronucleus (MN) test. The 96-h LC50 showed that the metals/metalloid demonstrated differential interactions in a concentration dependent pattern. The 96-h LC50 showed that Cr was the most toxic while Cu and As:Cu were indeterminate (Cr > Cr:Cu > As:Cr > As > As:Cr:Cu > Cu = As:Cu indeterminate). Isobologram and synergistic ratio (SR) models predicted antagonistic interaction between Cu:Cr and As:Cr and synergism between As:Cu in the causation of morbidity and mortality of C. gariepinus. Interaction factor model predicted antagonism as common interactive mechanism among the metal/metalloid mixtures in the induction of MN and abnormal nuclear erythrocytes in C. gariepinus. Predicted interactions among the three metals/ metalloid were largely antagonism and synergism towards the induction of acute toxicity and cytogenotoxicity. The models employed herein may be useful in establishing environmental safe limits for mixtures of metals/metalloids against the induction of acute toxicity and DNA damage in lower aquatic vertebrates.","PeriodicalId":101307,"journal":{"name":"Environmental analysis, health and toxicology","volume":"158 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76887846","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}
Benzalkonium chloride is a cationic surfactant widely used as a disinfectant, preservative, and sanitizer in many public places as well as domestically. The purpose of this study is to compare the acute toxicity of lethal doses (LDx) and the target organs after intratracheal instillation and oral ingestion by mice, which is a preliminary test prior to the repeated dose toxicity test. When Balb/c mice were treated with a single dose of benzalkonium chloride via oral administration, LD50 was 241.7 mg/kg. However, it was comparatively decreased to 8.5 mg/kg following intratracheal treatment, which suggests that lung may be the main target of toxicity. Although the histopathology showed inflammatory responses in the lung after intratracheal instillation, it still did not confirm that the inflammatory responses were the key factors inducing death in the treated animal. Acute and fatal mechanisms such as bronchoconstriction or neurotoxicity associated with benzalkonium chloride exposure should be further investigated.
{"title":"Acute toxicity of benzalkonium chloride in Balb/c mice following intratracheal instillation and oral administration","authors":"Handule Lee, Kwangsik Park","doi":"10.5620/eaht.e2019009","DOIUrl":"https://doi.org/10.5620/eaht.e2019009","url":null,"abstract":"Benzalkonium chloride is a cationic surfactant widely used as a disinfectant, preservative, and sanitizer in many public places as well as domestically. The purpose of this study is to compare the acute toxicity of lethal doses (LDx) and the target organs after intratracheal instillation and oral ingestion by mice, which is a preliminary test prior to the repeated dose toxicity test. When Balb/c mice were treated with a single dose of benzalkonium chloride via oral administration, LD50 was 241.7 mg/kg. However, it was comparatively decreased to 8.5 mg/kg following intratracheal treatment, which suggests that lung may be the main target of toxicity. Although the histopathology showed inflammatory responses in the lung after intratracheal instillation, it still did not confirm that the inflammatory responses were the key factors inducing death in the treated animal. Acute and fatal mechanisms such as bronchoconstriction or neurotoxicity associated with benzalkonium chloride exposure should be further investigated.","PeriodicalId":101307,"journal":{"name":"Environmental analysis, health and toxicology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79095936","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}
The deplorable environmental conditions coupled to poor management practices employed by public swimming pool owners have led to suspicions over the safety of these recreational sites. This study was carried out to determine the physicochemical properties, heavy metal contents and accumulation, and associated risks of six swimming pools in Owerri, Capital of Imo State, Nigeria. Physicochemical analysis was conducted using standard methods while determination of heavy metals was carried out using an atomic absorption spectrophotometer. Results obtained showed that the turbidities and total dissolved solutes exceeded the Nigeria standard for water quality. Iron (Fe), cadmium (Cd), mercury (Hg), arsenic (As), nickel (Ni), and lead (Pb) exceeded the drinking safety values from United States Environmental Protection Agency, National Standards for Drinking Water Quality, and World Health Organization, while selenium (Se), chromium (Cr), and zinc (Zn) values fell within the permissible limits. From the bioaccumulation models applied, the enrichment factors showed anthropogenic source of deposition of the metals in all swimming pool while the heavy metal index were in a range of 27.30-70.19. For the risk assessment results, the chronic daily intake showed that Hg, and As levels for all the swimming pools, and Cu for some swimming pools exceeded the oral reference doses, while the hazard quotient for Hg (5.65-16.95), As (2.26-3.77), and Cu (1.13-4.11) indicated potentials of causing related toxicities. This study has shown that the aesthetic quality of the swimming pools were compromised, and contained elevated levels of Hg, As, and Cu significant enough to threaten the health safety of users of these swimming pools, which should instigate tough measures from Nigerian water regulatory bodies to ensure compliance from public swimming pool owners.
{"title":"Swimming pools quality risk assessment for heavy metal deposition and intake via oral and dermal exposure","authors":"Agomuo Emmanuel Nnabugwu, Amadi Peter Uchenna","doi":"10.5620/eaht.e2019008","DOIUrl":"https://doi.org/10.5620/eaht.e2019008","url":null,"abstract":"The deplorable environmental conditions coupled to poor management practices employed by public swimming pool owners have led to suspicions over the safety of these recreational sites. This study was carried out to determine the physicochemical properties, heavy metal contents and accumulation, and associated risks of six swimming pools in Owerri, Capital of Imo State, Nigeria. Physicochemical analysis was conducted using standard methods while determination of heavy metals was carried out using an atomic absorption spectrophotometer. Results obtained showed that the turbidities and total dissolved solutes exceeded the Nigeria standard for water quality. Iron (Fe), cadmium (Cd), mercury (Hg), arsenic (As), nickel (Ni), and lead (Pb) exceeded the drinking safety values from United States Environmental Protection Agency, National Standards for Drinking Water Quality, and World Health Organization, while selenium (Se), chromium (Cr), and zinc (Zn) values fell within the permissible limits. From the bioaccumulation models applied, the enrichment factors showed anthropogenic source of deposition of the metals in all swimming pool while the heavy metal index were in a range of 27.30-70.19. For the risk assessment results, the chronic daily intake showed that Hg, and As levels for all the swimming pools, and Cu for some swimming pools exceeded the oral reference doses, while the hazard quotient for Hg (5.65-16.95), As (2.26-3.77), and Cu (1.13-4.11) indicated potentials of causing related toxicities. This study has shown that the aesthetic quality of the swimming pools were compromised, and contained elevated levels of Hg, As, and Cu significant enough to threaten the health safety of users of these swimming pools, which should instigate tough measures from Nigerian water regulatory bodies to ensure compliance from public swimming pool owners.","PeriodicalId":101307,"journal":{"name":"Environmental analysis, health and toxicology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76669653","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}
{"title":"First issue of EAHT","authors":"Jung-Hwan Kwon","doi":"10.5620/EAHT.E2019007","DOIUrl":"https://doi.org/10.5620/EAHT.E2019007","url":null,"abstract":"","PeriodicalId":101307,"journal":{"name":"Environmental analysis, health and toxicology","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78291609","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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