1
|
Morales-Figueroa C, Linares-Hernández I, Martínez-Miranda V, Teutli-Sequeira EA, Castillo-Suárez LA, Garduño-Pineda L. Electro-galvanic alkalization and treatment of rainwater to obtain drinking water. ENVIRONMENTAL TECHNOLOGY 2024; 45:4116-4130. [PMID: 37490626 DOI: 10.1080/09593330.2023.2241618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/19/2023] [Indexed: 07/27/2023]
Abstract
Rainwater Electro-Galvanic Alkalization (EGA) was performed using copper and magnesium (1:1) electrode. Efficiently removal of pollutants without external energy consumption was carried out, in addition essential ions were dosed for alkalization of rainwater. The optimal system conditions were obtained using response surface methodology (RSM) by considering the following operating variables: flow rate and concentration of the supporting electrolyte (NaCl and CaCl2). Furthermore, the maximum efficiency of nitrate, ammoniacal nitrogen, colour, and turbidity removal was evaluated. The results showed that the response variables were mainly sensitive to the type of supporting electrolyte used and the flow rate. Under experimental conditions of 0.009 M (NaCl) and 20 mL min-1, the removal rate was 74.19%, 72.49%, and 81.43% for nitrates, colour, and turbidity, respectively, and the lowest concentration of ammoniacal nitrogen (0.99 mg L - 1 ) was obtained. The kinetic models for nitrate and colour were fitted to zero-order models with k = 0.33 mg L - 1 mi n - 1 and k = 0.933 Pt - Co , respectively. In addition, turbidity was fitted to a first-order model ( k = 0.1661 mi n - 1 ) , and ammoniacal nitrogen was fitted to a second-order model ( k = 0.0217 L m g - 1 mi n - 1 ) . The concentration increases of minerals such as Ca and Mg, which rises the rainwater alkalinity after treatment (pH shift from 6.1 to 8.91), was determined by inductively coupled plasma (ICP) analysis.
Collapse
Affiliation(s)
- Cristina Morales-Figueroa
- Facultad de Química, Unidad Colón, Toluca de Lerdo, México
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Unidad San Cayetano, Universidad Autónoma del Estado de México, Toluca, México
| | - Ivonne Linares-Hernández
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Unidad San Cayetano, Universidad Autónoma del Estado de México, Toluca, México
| | - Verónica Martínez-Miranda
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Unidad San Cayetano, Universidad Autónoma del Estado de México, Toluca, México
| | | | - Luis Antonio Castillo-Suárez
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Unidad San Cayetano, Universidad Autónoma del Estado de México, Toluca, México
- Advanced Oxidation Processes Department, Cátedras COMECYT, Toluca, México
| | - Laura Garduño-Pineda
- Analytics Chemistry Department, Tecnológico de Estudios Superiores de Jocotitlán (TESJo), Jocotitlán, México
| |
Collapse
|
2
|
Artus A, Schafer IJ, Cossaboom CM, Haberling DL, Galloway R, Sutherland G, Browne AS, Roth J, France V, Cranford HM, Kines KJ, Pompey J, Ellis BR, Walke H, Ellis EM. Seroprevalence, distribution, and risk factors for human leptospirosis in the United States Virgin Islands. PLoS Negl Trop Dis 2022; 16:e0010880. [PMID: 36378681 PMCID: PMC9665390 DOI: 10.1371/journal.pntd.0010880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 10/10/2022] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND The first documented human leptospirosis cases in the U.S. Virgin Islands (USVI) occurred following 2017 Hurricanes Irma and Maria. We conducted a representative serosurvey in USVI to estimate the seroprevalence and distribution of human leptospirosis and evaluate local risk factors associated with seropositivity. METHODOLOGY/PRINCIPAL FINDINGS A stratified, two-stage cluster sampling design was used and consisted of three island strata and random selection of census blocks and then households. All eligible members of selected households were invited to participate (≥5 years old, resided in USVI ≥6 months and ≥6 months/year). Household and individual-level questionnaires were completed, and serum collected from each enrolled individual. Microscopic agglutination test serology was conducted, and bivariate and logistic regression analyses completed to identify risk factors for seropositivity. In March 2019, 1,161 individuals were enrolled from 918 households in St. Croix, St. Thomas, and St. John. The territory-wide weighted seroprevalence was 4.0% (95% CI:2.3-5.7). Characteristics/exposures independently associated with seropositivity using logistic regression included contact with cows (OR: 39.5; 95% CI: 9.0-172.7), seeing rodents/rodent evidence or contact with rodents (OR: 2.6; 95% CI: 1.1-5.9), and increasing age (OR: 1.02; 95% CI: 1.002-1.04); full or partial Caucasian/White race was negatively correlated with seropositivity (OR: 0.02, 95% CI: 0.04-0.7). Bivariate analysis showed self-reported jaundice since the 2017 hurricanes (pRR: 5.7; 95% CI: 1.0-33.4) was associated with seropositivity and using a cover/lid on cisterns/rainwater collection containers (pRR: 0.3; 95% CI: 0.08-0.8) was protective against seropositivity. CONCLUSIONS/SIGNIFICANCE Leptospirosis seropositivity of 4% across USVI demonstrates an important human disease that was previously unrecognized and emphasizes the importance of continued leptospirosis surveillance and investigation. Local risk factors identified may help guide future human and animal leptospirosis studies in USVI, strengthen leptospirosis public health surveillance and treatment timeliness, and inform targeted education, prevention, and control efforts.
Collapse
Affiliation(s)
- Aileen Artus
- Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Ilana J. Schafer
- Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Caitlin M. Cossaboom
- Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- Epidemic Intelligence Service, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Dana L. Haberling
- Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Renee Galloway
- Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Graham Sutherland
- Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - A. Springer Browne
- Epidemic Intelligence Service, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- U.S. Virgin Islands Department of Health, U.S. Virgin Islands, United States of America
| | - Joseph Roth
- U.S. Virgin Islands Department of Health, U.S. Virgin Islands, United States of America
- Division of Local and State Readiness, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Valicia France
- U.S. Virgin Islands Department of Health, U.S. Virgin Islands, United States of America
| | - Hannah M. Cranford
- U.S. Virgin Islands Department of Health, U.S. Virgin Islands, United States of America
| | - Kristine J. Kines
- Division of Preparedness and Emerging Infections, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Justine Pompey
- Division of Preparedness and Emerging Infections, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Brett R. Ellis
- U.S. Virgin Islands Department of Health, U.S. Virgin Islands, United States of America
| | - Henry Walke
- Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, U.S. Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Esther M. Ellis
- U.S. Virgin Islands Department of Health, U.S. Virgin Islands, United States of America
| | | |
Collapse
|
3
|
Direct One-Step Seedless Hydrothermal Growth of ZnO Nanostructures on Zinc: Primary Study for Photocatalytic Roof Development for Rainwater Purification. Catalysts 2022. [DOI: 10.3390/catal12101231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
To shift towards the greener city, photocatalytic urban infrastructures have emerged as a promising solution for pollution remediation. To reach this goal, the large bandgap semiconductors, such as nontoxic Zinc Oxide (ZnO), already proved their excellent photocatalytic performances. However, integrating and developing cost-effective and greener photocatalytic surfaces with an easily scaled-up synthesis method and without energy and chemical product overconsumption is still challenging. Therefore, this work proposes to develop a depolluting Zinc (Zn) roof covered by ZnO nanostructures (NSs) using a one-step seedless hydrothermal growth method in 2 h. The feasibility of this synthesis was firstly studied on small areas of Zn (1.25 cm2) before being scaled up to medium-sized areas (25 cm2). The efficiency of this functionalization route for ZnO NSs grown without seed layer was attributed to the presence of Zn2+ sites and the native oxide film on the Zn surface. Their photocatalytic efficiency was demonstrated by removing in less than 3 h the Methylene Blue (MB) and Acid Red 14 (AR14) in both DI water and rainwater under UV-light. Promising results were also recorded under solar light. Therefore, the photocatalytic Zn roof functionalized by ZnO NSs is a promising route for rainwater purification by photocatalysis.
Collapse
|
4
|
Cousins IT, Johansson JH, Salter ME, Sha B, Scheringer M. Outside the Safe Operating Space of a New Planetary Boundary for Per- and Polyfluoroalkyl Substances (PFAS). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:11172-11179. [PMID: 35916421 PMCID: PMC9387091 DOI: 10.1021/acs.est.2c02765] [Citation(s) in RCA: 136] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Indexed: 05/16/2023]
Abstract
It is hypothesized that environmental contamination by per- and polyfluoroalkyl substances (PFAS) defines a separate planetary boundary and that this boundary has been exceeded. This hypothesis is tested by comparing the levels of four selected perfluoroalkyl acids (PFAAs) (i.e., perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorohexanesulfonic acid (PFHxS), and perfluorononanoic acid (PFNA)) in various global environmental media (i.e., rainwater, soils, and surface waters) with recently proposed guideline levels. On the basis of the four PFAAs considered, it is concluded that (1) levels of PFOA and PFOS in rainwater often greatly exceed US Environmental Protection Agency (EPA) Lifetime Drinking Water Health Advisory levels and the sum of the aforementioned four PFAAs (Σ4 PFAS) in rainwater is often above Danish drinking water limit values also based on Σ4 PFAS; (2) levels of PFOS in rainwater are often above Environmental Quality Standard for Inland European Union Surface Water; and (3) atmospheric deposition also leads to global soils being ubiquitously contaminated and to be often above proposed Dutch guideline values. It is, therefore, concluded that the global spread of these four PFAAs in the atmosphere has led to the planetary boundary for chemical pollution being exceeded. Levels of PFAAs in atmospheric deposition are especially poorly reversible because of the high persistence of PFAAs and their ability to continuously cycle in the hydrosphere, including on sea spray aerosols emitted from the oceans. Because of the poor reversibility of environmental exposure to PFAS and their associated effects, it is vitally important that PFAS uses and emissions are rapidly restricted.
Collapse
Affiliation(s)
- Ian T. Cousins
- Department
of Environmental Science, Stockholm University, SE-10691 Stockholm, Sweden
| | - Jana H. Johansson
- Department
of Environmental Science, Stockholm University, SE-10691 Stockholm, Sweden
| | - Matthew E. Salter
- Department
of Environmental Science, Stockholm University, SE-10691 Stockholm, Sweden
| | - Bo Sha
- Department
of Environmental Science, Stockholm University, SE-10691 Stockholm, Sweden
| | - Martin Scheringer
- Institute
of Biogeochemistry and Pollutant Dynamics, ETH Zürich, 8092 Zürich, Switzerland
- RECETOX, Masaryk University, 625 00 Brno, Czech Republic
| |
Collapse
|
5
|
Bonotto DM. Hydrochemical and radiometric evaluation of fresh and thermal waters from Araxá city (Minas Gerais, Brazil). ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2022; 44:2163-2186. [PMID: 34390450 DOI: 10.1007/s10653-021-01058-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
This paper reports the hydrochemistry and activity concentration of the natural radionuclides 238U, 234U, and 210Po for three compartments of the hydrological/hydrogeological system in Araxá city, Minas Gerais State, Brazil: 1) mineral waters from the prominent springs Dona Beja (DBS) and Andrade Júnior (AJS), occurring at Barreiro area; 2) surface waters from Barreiro area and vicinity; and 3) rainwater. According to the Rule for Mineral Waters in Brazil (Register 7841) for temperature, the DBS water is cold (< 25 °C), while AJS is hypothermal (25-33 °C). The TDS (Total Dissolved Solids) concentration of DBS is low (70 mg/L), but high in AJS (2898 mg/L). The hydrogeochemical facies corresponded to sodium-(bi)carbonate for AJS and sodium/potassium-bicarbonate for DBS. The hydrochemical differences of DBS and AJS waters reflect the distinct characteristics of their respective aquifer systems. The DBS classification for TDS is the same of the Barreiro basin surface waters (mean TDS = 102 mg/L). Such value is somewhat higher than that of the rainwater and surface waters used for human consumption at Araxá city (TDS < 50 mg/L). The dataset reported in this paper indicated that fluoride and barium exceeded the WHO limits proposed in 2011 for drinking water. Among the natural radionuclides analyzed here that offer potential hazards for the human health is 210Po, whose WHO's limiting value of 100 mBq/L in drinking water was exceeded in rainwater, thus, restricting the use of this resource as a possible supply of drinking water for the local community.
Collapse
Affiliation(s)
- Daniel M Bonotto
- Instituto de Geociências e Ciências Exatas-IGCE, Universidade Estadual Paulista-UNESP, Av 24-A No. 1515, P.O. Box 178, Rio Claro, São Paulo,, CEP 13506-900, Brazil.
| |
Collapse
|
6
|
Community-Scale Rural Drinking Water Supply Systems Based on Harvested Rainwater: A Case Study of Australia and Vietnam. WATER 2022. [DOI: 10.3390/w14111763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Rainwater harvesting (RWH) systems can be used to produce drinking water in rural communities, particularly in developing countries that lack a clean drinking water supply. Most previous research has focused on the application of RWH systems for individual urban households. This paper develops a yield-after-spillage water balance model (WBM) which can calculate the reliability, annual drinking water production (ADWP) and benefit–cost ratio (BCR) of a community-scale RWH system for rural drinking water supply. We consider multiple scenarios regarding community aspects, including 150–1000 users, 70–4800 kL rainwater storage, 20–50 L/capita/day (LCD) drinking water usage levels, local rainfall regimes and economic parameters of Australia (developed country) and Vietnam (developing country). The WBM analysis shows a strong correlation between water demand and water supply with 90% system reliability, which allows both Australian and Vietnamese systems to achieve the similar capability of ADWP and economic values of the produced drinking water. However, the cost of the Vietnamese system is higher due to the requirement of larger rainwater storage due to larger household size and lower rainfall in the dry season, which reduces the BCR compared to the Australian systems. It is found that the RWH systems can be feasibly implemented at the water price of 0.01 AUD/L for all the Vietnamese scenarios and for some Australian scenarios with drinking water demand over 6 kL/day.
Collapse
|
7
|
Lead exposure and stunting incidents in children aged 3–5 years in Pontianak City, West Kalimantan, Indonesia. TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2022. [DOI: 10.1016/j.toxac.2022.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
8
|
Satriani S, Ilma IS, Daniel D. Trends of Water, Sanitation, and Hygiene (WASH) Research in Indonesia: A Systematic Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19031617. [PMID: 35162638 PMCID: PMC8835571 DOI: 10.3390/ijerph19031617] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/24/2022] [Accepted: 01/28/2022] [Indexed: 02/05/2023]
Abstract
This study provides an overview of water, sanitation, and hygiene (WASH) research trends in Indonesia from 1975 until April 2021. The systematic review compiled 272 articles related to the Sustainable Development Goals 6.1 and 6.2 in Indonesia, which were published in the Web of Science and Scopus databases. The results showed that the water-related topic (41%) was discussed more often than sanitation (22%) or hygiene (13%). Furthermore, the social theme (39%) was dominantly found in all these articles, mostly finding determinants of WASH-related behavior. However, few WASH implementation studies or behavioral change interventions were recorded in Indonesia, suggesting a gap between science and policy or implementation. On the other hand, hygiene-related topics (14%) and WASH-related financial themes (6%) were the least studied in Indonesia. Combinations of topics (23%) and themes (15%) were also often conducted in Indonesia, suggesting that WASH researchers started to recognize the need to analyze WASH problems holistically, i.e., from multiple perspectives. In addition, the distribution of WASH research was still dominated in the central part of Indonesia, whereas the WASH-related problems, i.e., poor WASH services, and behavior, often occur in this area. This study also offers some research gaps, both in terms of topics, themes, and regional distribution, that need to be considered for the design of future WASH research in Indonesia.
Collapse
Affiliation(s)
- S. Satriani
- Department of Environmental Science, The Graduate School, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia; (S.S.); (I.S.I.)
| | - Izana Saffana Ilma
- Department of Environmental Science, The Graduate School, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia; (S.S.); (I.S.I.)
| | - D. Daniel
- Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
- Department of Health Behaviour, Environment, and Social Medicine, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
- Correspondence: or
| |
Collapse
|
9
|
Raj AV, Jamwal P, Anju AK, Kumar P, Biswas D, Rao L, Helliwell R, Richards S, Ellis R, Koseoglu N, Yeluripati J, Connelly S. A novel approach to baseline water quality assessment at local and catchment scale: a case study from Berambadi, India. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:837. [PMID: 34811602 DOI: 10.1007/s10661-021-09617-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
Optimal design and maintenance are necessary for the sustainability of wastewater treatment systems. In this study, we present the outcome of a novel approach to baseline assessment conducted prior to the design and deployment of a decentralized wastewater treatment system at a school in rural India. The baseline water quality monitoring protocol was deployed to assess (a) the quality and quantity of wastewater (greywater and blackwater) flows from the school and (b) the status of surface water and groundwater quality in the catchment. Hourly greywater flows and water quality trends were monitored across four seasons at the school. Average freshwater consumption at the school was 518 ± 322 L/day for hand washing and 287 ± 97 L/day for cooking meals. Greywater generation showed high hourly variations in COD levels. Greywater generated from hand wash and kitchen sources contributed to 110 g/day and 96 g/day of BOD5 respectively and 214 g/day and 141 g/day of COD respectively. Based on additional data from a self-reporting sanitation survey, the organic contaminant load generated from the toilet was estimated to be 1.5 ± 0.1 kg COD/day. At the catchment scale, both groundwater and surface water quality were monitored seasonally to assess the impact of raw sewage and stormwater inputs. Compared with borewells, high nitrate-N levels (> 10 mg/L) were observed in the village hand pump samples throughout the year. Maximum nitrate-N (16 mg/L) and fecal coliforms (3.9 log MPN/100 mL) levels were observed in surface waters during monsoons, indicating the impact of sewage and surface runoff on water quality. The proposed approach is useful to estimate data on freshwater use and wastewater generation at the school and hence to make the case for, and design of, a sustainable water management intervention.
Collapse
Affiliation(s)
- Anjali V Raj
- Centre for Environment and Development, Ashoka Trust for Research in Ecology and the Environment (ATREE), Bangalore, India
| | - Priyanka Jamwal
- Centre for Environment and Development, Ashoka Trust for Research in Ecology and the Environment (ATREE), Bangalore, India.
| | - Anusree K Anju
- Centre for Environment and Development, Ashoka Trust for Research in Ecology and the Environment (ATREE), Bangalore, India
| | - Praveen Kumar
- Centre for Environment and Development, Ashoka Trust for Research in Ecology and the Environment (ATREE), Bangalore, India
| | - Durba Biswas
- Centre for Environment and Development, Ashoka Trust for Research in Ecology and the Environment (ATREE), Bangalore, India
| | - Lakshminarayana Rao
- Centre for Sustainable Technologies, Indian Institute of Science (IISc), Bangalore, India
| | - Rachel Helliwell
- Environmental and Biochemical Sciences, The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, Scotland, UK
| | - Samia Richards
- Environmental and Biochemical Sciences, The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, Scotland, UK
| | - Rowan Ellis
- Social, Economic and Geographical Sciences, The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, Scotland, UK
| | - Nazli Koseoglu
- Social, Economic and Geographical Sciences, The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, Scotland, UK
| | - Jagadeesh Yeluripati
- Information and Computational Sciences, The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, Scotland, UK
| | - Stephanie Connelly
- Division of Infrastructure and Environment, James Watt School of Engineering, University of Glasgow, Glasgow, G12 8LT, UK
| |
Collapse
|
10
|
Ebraheim G, Karbassi A, Mehrdadi N. The thermodynamic stability, potential toxicity, and speciation of metals and metalloids in Tehran runoff, Iran. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:4719-4740. [PMID: 33973140 DOI: 10.1007/s10653-021-00966-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 05/01/2021] [Indexed: 06/12/2023]
Abstract
Surface runoff is the most significant source of water in dry cities like Tehran. The surface runoff is polluted by heavy metals, which their risk level is a function of their speciation. Herein, Tehran runoff quality and the speciation of metals and metalloids were investigated. The results of quality showed that oxidation-reduction potential (Eh) and pH ranged from + 186 to + 230 mV and from 7.31 to 10.29, respectively. Cluster analysis indicated that Cr, Si, Mn, Fe, Pb, Se, Th, Ba, Ni, Li, and Sr had similar behaviors and origins, and salinity played an active role in restricting their concentrations. Eh and dissolved oxygen (DO) negatively affected the concentrations of all the studied elements. The speciation model (according to HSC Chemistry program) exhibited that all the studied elements are stable; however, in two cases, they would become unstable (pH < 7, Eh < - 480 mV or Eh > 1100 mV) and (pH > 10, Eh < - 570 mV or Eh > 970 mV). Also, Ba, Cd, Li, Mn, Al, As, Sr, Cr, Si, and Se are present in bioavailable species and As and Cd in the runoff exist in high toxic oxidation states of + 3 and + 2, respectively. The linear regression of Cu, Co, Cd, Zn, and As with Eh provided a good fit, and all of these metals were significant at levels 1 and 5%. Finally, it is recommended to continuously monitor the Eh-pH changes for investigating the potential toxicity of metals and predicting the metal pollution by regression equations in any other stations.
Collapse
Affiliation(s)
- Ghazal Ebraheim
- Department of Environmental Engineering, School of Environment, College of Engineering, University of Tehran, P.O. Box 14155-6135, Tehran, Iran
| | - Abdolreza Karbassi
- Department of Environmental Engineering, School of Environment, College of Engineering, University of Tehran, P.O. Box 14155-6135, Tehran, Iran.
| | - Naser Mehrdadi
- Department of Environmental Engineering, School of Environment, College of Engineering, University of Tehran, P.O. Box 14155-6135, Tehran, Iran
| |
Collapse
|
11
|
Integrated Water Resource Management: Rethinking the Contribution of Rainwater Harvesting. SUSTAINABILITY 2021. [DOI: 10.3390/su13158338] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Rainwater harvesting (RWH) is generally perceived as a promising cost-effective alternative water resource for potable and non-potable uses (water augmentation) and for reducing flood risks. The performance of RWH systems has been evaluated for various purposes over the past few decades. These systems certainly provide economic, environmental, and technological benefits of water uses. However, regarding RWH just as an effective alternative water supply to deal with the water scarcity is a mistake. The present communication advocates for a systematic RWH and partial infiltration wherever and whenever rain falls. By doing so, the detrimental effects of flooding are reduced, groundwater is recharged, water for agriculture and livestock is stored, and conventional water sources are saved. In other words, RWH should be at the heart of water management worldwide. The realization of this goal is easy even under low-resource situations, as infiltration pits and small dams can be constructed with local skills and materials.
Collapse
|
12
|
Ajani EO, Afolayan JS, Sabiu S. Characterization of Blighia sapida synthesized-copper nanoparticle and its application in periodic pharmaceutical effluent treatment. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:508-515. [PMID: 33656407 DOI: 10.1080/10934529.2021.1890497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
With the rapid increase in pharmaceutical wastewater treatment for diverse applications and to contribute to the understanding of suitability of nanoparticles (NPs) in pharmaceutical effluent treatment, this study was conceptualized. Here, we profiled the concentration of selected heavy metals (Cd, Cr, Pb, Cu and Ni) in pharmaceutical effluent samples over three sampling periods using atomic absorption spectroscopy and evaluated the effectiveness of B. sapida synthesized copper nanoparticles (Cu NPs) in pharmaceutical effluent treatment. The results showed that there was no significant (p > 0.05) difference in the heavy metals concentration of the pharmaceutical effluents across the three sampling periods. This observation could be attributed to the low environmental concentration of the metals that prevented significant leaching into the company's water source through rainfall or the highly effective water treatment pathways that successfully reduced the metals concentration. Despite the observed increase in Cu ions in the treated samples due to the synthesized NPs, its concentration still conforms to the internationally accepted admissible limit in drinkable water. Studies seeking to understand the suitability and toxicological implications of use of the NP-treated effluents are highly encouraged and efforts are underway in this direction.
Collapse
Affiliation(s)
- Emmanuel O Ajani
- Department of Medical Biochemistry and Pharmacology, Kwara State University, Malete, Nigeria
| | - Juwon S Afolayan
- Department of Medical Biochemistry and Pharmacology, Kwara State University, Malete, Nigeria
| | - Saheed Sabiu
- Department of Biotechnology and Food Science, Faculty of Applied Science, Durban University of Technology, Durban, South Africa
| |
Collapse
|