Article
Biochemistry & Molecular Biology
Mohammad Taghi Shakeri, Hossein Nezami, Samaneh Nakhaee, Jan Aaseth, Omid Mehrpour
Summary: This study compared the toxicity of heavy metal levels in the blood of smokers and non-smokers in Birjand, finding that smokers had significantly higher concentrations of thallium, arsenic, manganese, and copper compared to non-smokers. Lead, cadmium, and cobalt were identified as the most critical metals accumulated in the blood of cigarette smokers. Cluster analysis showed a different grouping of elements in the smoker and non-smoker groups, indicating potential health risks associated with heavy metal exposure from smoking.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Yan Cong, Rui-lian Yu, Yu Yan, Bo-sen Weng, Gong-ren Hu, Jing-wei Sun, Jian-yong Cui, Yao-yi Huang
Summary: This study determined the concentrations of heavy metals in Tieguanyin tea plants and identified agricultural activities as the main source of heavy metals pollution in tea.
Article
Environmental Sciences
Kei Nakagawa, Tomomi Imura, Ronny Berndtsson
Summary: The distribution of heavy metal concentrations and related human health risks were investigated in Shimabara City, Nagasaki Prefecture. Potential heavy metal contamination in an area affected by nitrate pollution was clarified, with livestock waste application and other anthropogenic pollutants identified as the possible sources. High concentrations of Cu and Zn were found in agricultural areas and urban areas.
Article
Engineering, Environmental
Varsha Gupta, Dinesh Kumar, Anamika Dwivedi, Umesh Vishwakarma, D. S. Malik, Seema Paroha, Narendra Mohan, Neelima Gupta
Summary: Exponential industrialization and anthropogenic activities have caused heavy metal contamination in the water sources in Kanpur city, India. This contamination not only affects the quality of river water, but also poses health issues and concerns due to groundwater contamination.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Environmental Sciences
Yevhen Maltsev, Anna Maltseva, Svetlana Maltseva
Summary: Heavy metals are common pollutants in natural ecosystems, affecting algae sensitivity and growth. This study showed that low concentrations of zinc and manganese can have toxic effects on algae, while higher concentrations can lead to complete death. The response of algae species to different metal concentrations varies, with some species being more resistant to specific metals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Economics
Jungjun Choi, Xiye Yang
Summary: This paper investigates the differences between conducting principal component analysis (PCA) using standardized data and using raw data in the context of high frequency data. Analytical forms of the asymptotic biases and variances for the estimators of the integrated eigenvalues and eigenvectors are derived, and a new jackknife-type estimator for the asymptotic variance of the integrated volatility functional estimator is proposed. Several statistical tests for commonly tested hypotheses are also introduced. Simulation results show that using analytical results from the covariance case when applying PCA on the correlation matrix can lead to misleading results.
JOURNAL OF ECONOMETRICS
(2022)
Article
Multidisciplinary Sciences
Eric N. Aidoo, Simon K. Appiah, Gaston E. Awashie, Alexander Boateng, Godfred Darko
Summary: Geographically weighted principal component analysis (GWPCA) reveals spatial heterogeneity of soil heavy metals, enhancing the understanding of their distribution. In Kumasi, Ghana, the concentration of heavy metal pollutants exhibits spatial heterogeneity. The use of PCA fails to account for this spatial variation in soil heavy metal pollutants.
Article
Engineering, Multidisciplinary
Mohit Aggarwal, S. Anbukumar, T. Vijaya Kumar
Summary: This study assessed heavy metal contamination in suspended solids samples collected from the Ganga River. The results showed moderate contamination by zinc, lead, and cadmium, and less contamination by other metals. Some sites exhibited progressive deterioration based on the pollution load index. Nawabganj and Manikpur were identified as the most contaminated sites. Statistical analysis revealed a strong correlation between copper, zinc, and nickel.
SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Srilert Chotpantarat, Jirawan Thamrongsrisakul
Summary: This study focused on investigating the hydrogeological and hydrochemical characteristics around a gold mine at the border between the Phichit and Phetchabun provinces. The results showed that both natural and anthropogenic processes had an impact on groundwater quality, with natural processes playing a greater role.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Biotechnology & Applied Microbiology
Jabbar Khan, Rani Singh, Pallavi Upreti, Rajesh Kumar Yadav
Summary: Soil systems are dynamic natural systems that play a crucial role in sustaining life on Earth. However, industrial activities, such as the discharge of effluents in the Bagru textile Printing and Dying industrial region in Rajasthan, India, are causing the degradation of soil and water quality, posing a threat to life and agriculture.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Environmental Sciences
Sumanta Banerjee, Pradip K. Sikdar
Summary: Hydrochemical fingerprinting of groundwater is used to analyze the physico-chemical dynamics and assess pumping-induced changes in a complex deltaic aquifer system in an urban-peri-urban area in the south Bengal Basin in India. The study reveals different hydrochemical facies in the groundwater samples and shows that over the past two decades, there has been a deterioration in groundwater quality due to over-withdrawal, with a significant increase in blended and brackish water areas.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Environmental Sciences
Ahmad Heidari, Vinod Kumar, Ali Keshavarzi
Summary: The study evaluated the quality of agricultural soils in Alborz province, Iran, finding that the heavy metal content was generally lower than international standards, with pH affecting the retention of zinc, copper, and manganese in soil. Results of contamination factor and ecological risk index showed low levels of contamination in soil samples, while enrichment factor and modified ecological risk index indicated high enrichment and ecological risk of copper, manganese, and zinc in surface and sub-surface soil samples.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Khawlhring Lalrammawia, Ananya Buragohain, Bomngam Kakki, Lalrinawma Zote, Nikrang K. Marak, Lalrinhlupuii, Malsawmtluangi, Rebecca Lalmuanpuii, Nachimuthu Senthil Kumar, Lalrintluanga Jahau, Mathummal Sudarshan, Omari Chaligava, Nikita Yushin, Dmitrii Grozdov, Pavel Nekhoroshkov, Konstantin Vergel, Inga Zinicovscaia, Rajendra Bose Muthukumaran
Summary: Even when cultivated in uncontaminated soils, tobacco plants have a higher propensity to extract and accumulate trace elements. The analysis showed weak correlations between heavy element mass fractions of tobacco and different soil parameters, and under acidic soil conditions, tobacco plants efficiently absorbed and translocated Cl- ions.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Vinod Kumar, Shevita Pandita, Raj Setia
Summary: The contamination of heavy metals in soils and sediments and its impact on human health have been studied in different countries. The study found that China and Ireland had the highest number of sampling sites, Cd and Hg were the most concentrated heavy metals in soils and sediments, and India and Poland had the highest PERI values. This research is important for controlling heavy metal pollution in soils and sediments.
Article
Chemistry, Analytical
Paulina Pecyna-Utylska, Edward Muntean, Joanna Kernert, Rajmund Michalski
Summary: This research focuses on the determination of selected metals in tap water from Upper Silesia region in Poland and assesses the risk for consumers. Heavy metal pollution index and metal index were used to determine the potential risk of heavy metals in drinking water. ICP-MS and ICP-OES were used to measure the concentrations of Co, Mn, Cu, Ni, Pb, As, Zn and Sr. Chemometric analysis, including principal component analysis and cluster analysis, was conducted to analyze the data and identify outliers. It is suggested that chemometric analysis can be a useful tool for corrective action in water distribution networks.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)