scholarly journals Public health responses to toxic cyanobacterial blooms: perspectives from the 2016 Florida event

Water Policy ◽  
2018 ◽  
Vol 20 (5) ◽  
pp. 919-932 ◽  
Author(s):  
James S. Metcalf ◽  
Sandra Anne Banack ◽  
James T. Powell ◽  
Fiona J. M. Tymm ◽  
Susan J. Murch ◽  
...  
Keyword(s):  
Management Strategies ◽  
Cyanobacterial Bloom ◽  
Cyanobacterial Blooms ◽  
World Health ◽  
Lake Okeechobee ◽  
Recreational Water ◽  
State Of Emergency ◽  
Guideline Values ◽  
Health Organization ◽  
World Health Organization Guideline

Abstract In June 2016, massive cyanobacterial blooms occurred in the St. Lucie River in Florida, caused by nutrient and cyanobacterial-laden water releases from Lake Okeechobee. We independently collected and analyzed bloom material for cyanotoxin diversity and concentrations. The concentrations of microcystins, potent hepatotoxins, present in the bloom material greatly exceeded World Health Organization Guideline Values for drinking and recreational water. We also detected the neurotoxins anatoxin-a(S) and β-N-methylamino-L-alanine (BMAA). The Florida State Governor declared a state of emergency, but many affected aquatic recreational areas in St. Lucie County remained open during the bloom event without adequate hazard notification to citizens. During the bloom event, issues with preparedness, communication, sampling, analysis, closures and contingencies were observed. We suggest better ways that cyanobacterial bloom events can be predicted, managed, and mitigated in the future throughout the world. As similar problems with cyanobacterial bloom frequency and occurrence present worldwide, understanding governmental responses to the 2016 Florida incident can help in the development of effective mitigation and management strategies for future bloom events.

scholarly journals Studies on Selected Metals and other Pollutants in Urban Atmosphere in Dhaka Bangladesh

2013 ◽  
Vol 61 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Mohammad Arifur Rahman ◽  
Abdur Rahim ◽  
Nur-E-Alam Siddique ◽  
AM Shafiqul Alam
Keyword(s):  
Size Fraction ◽  
Fine Fraction ◽  
Coarse Fraction ◽  
Average Concentration ◽  
Urban Atmosphere ◽  
World Health ◽  
Suspended Particulates ◽  
Guideline Values ◽  
Health Organization ◽  
World Health Organization Guideline

The concentration of lead, iron and potassium were determined in suspended particulates matters (SPM) in the atmosphere Dhaka, Bangladesh between January and June, 2008. The sampling areas are Khandakar Mukarram Hossain Biggan Bhaban, University of Dhaka, Tejgaon, Hazaribagh, Uttara and Agargaon new colony. The average concentrations of TSP, PM10 and PM2.5 were 68, 43 and 35 ?g m-3, respectively. About 82% particles were from fine fraction (PM2.5) and 18% were from coarse fraction (PM10-2.5), which indicates mechanical processes are one of the main sources for the particulate matters in air of Dhaka. The concentration of lead, iron and potassium were determined by using atomic absorption spectrophotometer (AAS) for the size fraction of PM10 with highest concentrations recorded for iron (10.8 ?g/m3) and lowest for lead (0.10 ?g/m3). The average concentration of NOx, O3 and SOx with eight hours sampling were 82.8, 22.5 and 25.5 ?g/m3 respectively. This study revealed that the concentrations of Pb, K, Fe, CO, NOx, O3 and SOx in Dhaka City were higher than the WHO (World Health Organization) guideline values. Dhaka Univ. J. Sci. 61(1): 41-46, 2013 (January) DOI: http://dx.doi.org/10.3329/dujs.v61i1.15094

scholarly journals The Toxic Metal Arsenic Contamination of the Coastal Aquifers in the North Coast of Java, Indonesia

2016 ◽  
Vol 18 (2) ◽  
Author(s):  
Chrisna Adhi Suryono
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Ground Water ◽  
Atomic Absorption ◽  
Quality Standard ◽  
World Health ◽  
Domestic Water ◽  
Guideline Values ◽  
Health Organization ◽  
World Health Organization Guideline

Pesatnya perkembangan industri dan aktivitas domestic di daerah pantai utara Jawa mendorong untuk perlunya dilakukan penelitian tentang kemungkinan adanya pencemaran logam Arsen (As) di akifer dangkal kota-kota Jakarta, Semarang dan Surabaya. Sebanyak 30 contoh air dari sumur-sumur yang berasal dari zona pemukiman di daerah pesisir dianalisis kandungan logam As dengan menggunakan teknik Atomic Absorption Spectrophotometer (AAS). Hasil analisis menunjukkan adanya kandungan logam As sebesar 59.65 μg L−1 di Jakarta. Rerata dan simpangan baku dari logam As di Jakarta, Semarang and Surabaya adalah 15.47 ± 18.79, 1.25 ± 2.05 and 0.59 ± 0.26 μgL-1. Terdapat korelasi yang nyata antara logam As dan Fe di airtanah. Dari hasil ini dapat disimpulkan bahwa tingkat kandungan logam As dan Fe di daerah akifer pantai utara Jawa masih berada di bawah ambang yang dipersyaratkan oleh Indonesian Drinking & Domestic Water Quality Standard for Ground Water and WHO’s (World Health Organization) Guideline Values for Drinking Water, kecuali untuk stasion 5 dan 6 dari Jakarta.Kata kunci: Arsen (As), AAS, akifer pantaiA study was conducted to assess the Arsenic (As) metal contamination of the shallow aquifers in Jakarta, Semarang, and Surabaya city of Java and its relation to the highly developed industrial and domestic activities in the coastal region. Arsen was assayed in the waters of 30 wells throughout the terrestrial cities, in residential zones using Atomic Absorption Spectrophotometer (AAS) technique. Analysis of the As level revealed that high As contents were found primarily in Jakarta, to a maximum of 59.65 μg L−1. The mean and standard deviation of As in Jakarta, Semarang and Surabaya were 15.47 ± 18.79, 1.25 ± 2.05 and 0.59 ± 0.26 μgL-1, respectively. The groundwater As concentration shows a correlation with Fe significantly. It was concluded that the levels of As in some investigated 3 Indonesian metropolis cities were below the maximum allowable concentrations of metals recommended by Indonesian Drinking & Domestic Water Quality Standard for Ground Water and WHO’s (World Health Organization)Guideline Values for Drinking Water, except for station 5 and 6 of Jakarta.Keywords: Arsenic (As), AAS, coastal aquifer

Toxic cyanobacterial blooms in a drinking water reservoir - causes, consequences and management strategy

2001 ◽  
Vol 1 (2) ◽  
pp. 237-246 ◽  
Author(s):  
M. Tarczyńska ◽  
Z. Romanowska-Duda ◽  
T. Jurczak ◽  
M. Zalewski
Keyword(s):  
Drinking Water ◽  
Management Strategies ◽  
Cyanobacterial Bloom ◽  
Water Reservoir ◽  
Dry Weight ◽  
Cyanobacterial Blooms ◽  
Potential Health ◽  
North East ◽  
Drinking Water Reservoir ◽  
Lowland Reservoirs

Eutrophication of reservoirs used for drinking water supplies is a very common problem, particularly in lowland reservoirs. Long water retention time (60-120 days) favours cyanobacterial bloom occurrence in Sulejów Reservoir, Poland. The localisation of the water intake in a bay exposed to north-east winds favoured the Microcystis bloom accumulation, which formed a 0.5 m thick dense scum for the first time in September 1999. Cyanobacterial hepatotoxins can pose a potential health problem because the presence of about 0.8 μg/l microcystins was detected in drinking water during three series of analysis. An investigation of the efficiency of each stage of water treatment processes in the elimination of microcystins showed that pre-chlorination, coagulation, and rapid sand filtration were ineffective in removing microcystins from water. Significant elimination was observed after ozonation and chlorination. The concentration of microcystins in bloom material was between 12 to 860 μg/g dry weight of phytoplankton biomass. Management strategies for reservoirs should consider the important role of ecohydrological processes, which are often very easy to regulate, and which can be useful for bio-manipulation of the water ecosystem.

scholarly journals Chemical and Biological Components of Urban Aerosols in Africa: Current Status and Knowledge Gaps

2019 ◽  
Vol 16 (6) ◽  
pp. 941 ◽  
Author(s):  
Egide Kalisa ◽  
Stephen Archer ◽  
Edward Nagato ◽  
Elias Bizuru ◽  
Kevin Lee ◽  
...  
Keyword(s):  
Management Strategies ◽  
Complex Mixture ◽  
Ambient Air ◽  
World Health ◽  
Current Status ◽  
Middle Income ◽  
Middle Income Countries ◽  
Polycyclic Aromatic ◽  
Nitro Derivatives ◽  
Health Organization

Aerosolized particulate matter (PM) is a complex mixture that has been recognized as the greatest cause of premature human mortality in low- and middle-income countries. Its toxicity arises largely from its chemical and biological components. These include polycyclic aromatic hydrocarbons (PAHs) and their nitro-derivatives (NPAHs) as well as microorganisms. In Africa, fossil fuel combustion and biomass burning in urban settings are the major sources of human exposure to PM, yet data on the role of aerosols in disease association in Africa remains scarce. This review is the first to examine studies conducted in Africa on both PAHs/NPAHs and airborne microorganisms associated with PM. These studies demonstrate that PM exposure in Africa exceeds World Health Organization (WHO) safety limits and carcinogenic PAHs/NPAHs and pathogenic microorganisms are the major components of PM aerosols. The health impacts of PAHs/NPAHs and airborne microbial loadings in PM are reviewed. This will be important for future epidemiological evaluations and may contribute to the development of effective management strategies to improve ambient air quality in the African continent.

A review of the analytical methodology to determine Radium-226 and Radium-228 in drinking waters

2018 ◽  
Vol 106 (10) ◽  
pp. 819-829 ◽  
Author(s):  
Akbar Abbasi
Keyword(s):  
Environmental Protection Agency ◽  
Liquid Scintillation ◽  
Concentration Level ◽  
Measurement Techniques ◽  
World Health ◽  
Analytical Methodology ◽  
Drinking Waters ◽  
Spectrometry Technique ◽  
Health Organization ◽  
World Health Organization Guideline

Abstract Radium-228 (228Ra) and Radium-226 (226Ra) isotopes in drinking water are significant from the aspect of radiation protection and human health. In this paper, the three most common preconcentration methods, i.e.coprecipitation, absorption and evaporation, were reviewed with emphasis on routinely measurement techniques. The reviewed measurement techniques include low background γ-spectrometry, α-spectrometry and liquid scintillation counting. The γ-spectrometry technique is the good selection, when the maximum sensitivity is considered. The Environmental Protection Agency guideline has provided the maximum concentration level 0.74 Bq/L for 226Ra and 228Ra. Also, the World Health Organization guideline limit is 1 Bq/L and 0.1 Bq/L for 226Ra and 228Ra, respectively.

scholarly journals Long-Term Assessment of Air Quality and Identification of Aerosol Sources at Setúbal, Portugal

2020 ◽  
Vol 17 (15) ◽  
pp. 5447 ◽  
Author(s):  
Alexandra Viana Silva ◽  
Cristina M. Oliveira ◽  
Nuno Canha ◽  
Ana Isabel Miranda ◽  
Susana Marta Almeida
Keyword(s):  
Air Quality ◽  
Urban Areas ◽  
Air Pollutants ◽  
Air Pollutant ◽  
Urban Traffic ◽  
Anthropogenic Sources ◽  
World Health ◽  
Mitigation Measures ◽  
Guideline Values ◽  
Health Organization

Understanding air pollution in urban areas is crucial to identify mitigation actions that may improve air quality and, consequently, minimize human exposure to air pollutants and their impact. This study aimed to assess the temporal evolution of the air quality in the city of Setúbal (Portugal) during a time period of 10 years (2003–2012), by evaluating seasonal trends of air pollutants (PM10, PM2.5, O3, NO, NO2 and NOx) measured in nine monitoring stations. In order to identify emission sources of particulate matter, PM2.5 and PM2.5–10 were characterized in two different areas (urban traffic and industrial) in winter and summer and, afterwards, source apportionment was performed by means of Positive Matrix Factorization. Overall, the air quality has been improving over the years with a decreasing trend of air pollutant concentration, with the exception of O3. Despite this improvement, levels of PM10, O3 and nitrogen oxides still do not fully comply with the requirements of European legislation, as well as with the guideline values of the World Health Organization (WHO). The main anthropogenic sources contributing to local PM levels were traffic, industry and wood burning, which should be addressed by specific mitigation measures in order to minimize their impact on the local air quality.

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