Abstract:
:Mine tailings have been analyzed by a sequential extraction procedure after their pre-treatment with a leaching solution for 24 h and electrodialytic remediation during 15 days with a constant electric field of 2.7 V cm-1. Four leaching solutions were tested: H₂SO₄ + HNO₃ (2:1 vol.) pH = 1.9; H₂SO₄ + HNO₃ (2:1 vol) pH = 4.2; NH₄Cl 0.8M, pH = 5.5 and 30% H₂O₂ adjusted to pH 2 with HNO₃ 1M + HCl 1M. After the treatment, the tailings were divided in six slices from anode to cathode. The highest removal efficiency of copper was obtained with H₂SO₄ + HNO₃ pH = 1.9, which allows one to remove 67% of the copper in the total cell and 85% of the copper in the slice closest to anode. The same solution with pH = 4.2 allows one to remove 62% of the total copper. The analysis realized by the sequential extraction method indicates the easy removal of water-soluble and exchangeable fractions in all experiments, moreover, residual and sulfide are the less mobile fractions. The general trend was the movement of copper associated to different fractions from anode to cathode and its accumulation closest to the cathode in the case of exchangeable, Fe-Mn oxides and acid soluble fractions, possibly due to some precipitation of copper compounds associated with less acidic conditions.
journal_name
Int J Environ Res Public Healthauthors
Lazo A,Hansen HK,Lazo P,Gutiérrez Cdoi
10.3390/ijerph16040584subject
Has Abstractpub_date
2019-02-18 00:00:00issue
4eissn
1661-7827issn
1660-4601pii
ijerph16040584journal_volume
16pub_type
杂志文章abstract::Bioflocculants mediate the removal of suspended particles from solution and the efficiency of flocculation is dependent on the characteristics of the flocculant. Apart from the merits of biodegradability and harmlessness, bioflocculants could be viable as industrially relevant flocculants as they are a renewable resou...
journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph14101149
更新日期:2017-09-29 00:00:00
abstract::This study aims at investigating medication literacy of discharged patients with acute coronary syndrome (ACS) in China, and the important determinants of medication literacy among them. For this purpose, we conducted a prospective cohort study. Patient's demographic and clinical data were retrieved from hospital char...
journal_title:International journal of environmental research and public health
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abstract::In light of the challenges that all cities face today, food is offered as a prism through which to read and intervene on various areas that affect the quality of life of the population: circular economy, urban metabolism, social relations, economies, and food quality. In the Roman context, in recent years, numerous in...
journal_title:International journal of environmental research and public health
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abstract::Previous research has found churches to be effective at delivering physical activity (PA) programs to their congregants. Mosques, however, have not been extensively studied. Therefore, we quantified U.S. Islamic centers' advertisement of PA programming and examined their programming characteristics. We conducted a con...
journal_title:International journal of environmental research and public health
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更新日期:2018-11-18 00:00:00
abstract::: The acquisition of competencies in basic life support (BLS) among university students of health sciences requires specific and updated training; therefore, the aim of this review was to identify, evaluate, and synthesise the available scientific knowledge on the effect of training in cardiorespiratory resuscitation ...
journal_title:International journal of environmental research and public health
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abstract::There is a scarcity of resources and studies that utilize targeted weight management interventions to engage parents via mHealth tools targeting obese children and adolescents with mild intellectual disabilities (MIDs) extended from school to a home setting. To test the feasibility and acceptability of a school-based ...
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pub_type: 杂志文章,随机对照试验
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journal_title:International journal of environmental research and public health
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更新日期:2020-11-18 00:00:00
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journal_title:International journal of environmental research and public health
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abstract::Globally, falls are the second leading cause of unintentional injury deaths, with 80% occurring in low-and middle-income countries. The overall objective of this study is to describe the burden and risk factors of falls in rural Bangladesh. In 2013, a large household survey covering a population of 1,169,593 was condu...
journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph14080900
更新日期:2017-08-10 00:00:00
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journal_title:International journal of environmental research and public health
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更新日期:2018-09-28 00:00:00
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journal_title:International journal of environmental research and public health
pub_type: 杂志文章
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更新日期:2020-05-16 00:00:00
abstract::Objectives: Isolation of Leptospira by culture represents a definitive growth and confirmation of the disease, yet it is hampered with its nature of slow growth. With slight modification of culture method, the study aims to isolate and characterize Leptospira spp. from patients with acute febrile illness. Methods: A t...
journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph17041307
更新日期:2020-02-18 00:00:00
abstract::In 2011, the Taiwan Food and Drug Administration inadvertently discovered that, for decades, manufacturers had replaced expensive natural emulsifiers in food products with diethylhexyl phthalate (DEHP). We wanted to compare urinary phthalate metabolite levels of children before and after the DEHP food contamination ev...
journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph14080935
更新日期:2017-08-19 00:00:00
abstract:BACKGROUND:The rising prevalence of allergies can substantially impact the skin, which is one of the largest targets for allergic and immunologic responses. OBJECTIVE:Here, we describe the results of an online survey assessing self-reported allergy prevalence in Americans, outline the populations who report allergies,...
journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph17103360
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journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph17134650
更新日期:2020-06-28 00:00:00
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pub_type: 杂志文章
doi:10.3390/ijerph18020518
更新日期:2021-01-10 00:00:00
abstract::Public transport is an effective and sustainable alternative to private vehicle usage, also helping to reduce the environmental impact of driving. However, the work environment of public transport operators is full of adverse conditions, which, together with their high mileage, may increase the occurrence of negative ...
journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph15030497
更新日期:2018-03-12 00:00:00
abstract::The aim of this study was to determine the caries status and risk factors in the schoolchildren of Spain's Valencia region in 2018 and to compare them to the 20-year evolution of caries indicators in the region. A cross-sectional survey was conducted with 1722 children and adolescents aged between 6 and 15 using clust...
journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph17186561
更新日期:2020-09-09 00:00:00
abstract::As the main bearing area of the ecological crisis in resource-rich cities, it is essential for the urban fringe to enhance regional ecological security during a city's transformation. This paper takes Daqing City, the largest oilfield in China's cold land, as an example. Based on remote sensing image data from 1980 to...
journal_title:International journal of environmental research and public health
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doi:10.3390/ijerph16234640
更新日期:2019-11-21 00:00:00
abstract::This study collected 11 parameters regarding the labial and lingual strength for maximum isometric and swallowing tasks among 150 healthy Chinese adults in Taiwan. Measurements were performed using the Iowa Oral Performance Instrument (IOPI). All of the labial and lingual strength parameters were measured three times....
journal_title:International journal of environmental research and public health
pub_type: 杂志文章
doi:10.3390/ijerph17217904
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abstract::Interventions to discourage sugary beverages and encourage water consumption have produced modest and unsustainable behavioral changes to reduce obesity and noncommunicable disease risks. This systematic scoping review examined media campaigns to develop a typology to support healthy hydration nonalcoholic beverage be...
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pub_type: 杂志文章,评审
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journal_title:International journal of environmental research and public health
pub_type: 社论
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journal_title:International journal of environmental research and public health
pub_type: 杂志文章,多中心研究
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abstract::Although the Chinese government has promulgated a series of policies to mitigate air pollution, the air quality in a number of Chinese cities still has the potential to be improved. As the major source of air pollution, enterprises in the industrial and energy sectors are the most difficult to regulate in terms of pol...
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abstract::Leptospirosis is a worldwide zoonotic disease whose transmission is linked through multiple factors in the animal-human-ecosystem interface. The data on leptospirosis reported to the World Organization for Animal Health (OIE) for Latin America and Caribbean (LAC) countries/sovereign territories from 2005-2011 were map...
journal_title:International journal of environmental research and public health
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abstract::Air pollution is an important environmental factor associated with health impacts in Europe and considerable resources are used to reduce exposure to air pollution through emission reductions. These reductions will have non-linear effects on exposure due, e.g., to interactions between climate and atmospheric chemistry...
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更新日期:2015-03-04 00:00:00