Leonardo Romero-Martinez

Leonardo Romero-Martinez
Universidad de Cádiz | UCA · Department of Environmental Technologies

Ph.D.

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18
Publications
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217
Citations

Publications

Publications (18)
Article
Full-text available
The Ballast Water Management Convention (BWMC) establishes limits regarding the permissible number of viable organisms in discharged ballast water. Ozone as a ballast water treatment is interesting because it can be generated in-situ and has strong oxidant power. Additionally, some oxidants can be formed in reaction with seawater, especially bromin...
Article
Full-text available
The Ballast Water Management Convention (BWMC) establishes limits for viable organisms in discharged ballast water. However, organisms smaller than 10 μm are not considered in this regulation although they represent, in some regions, the majority of the phytoplankton organisms in marine water. The objective in this study is to assess three photosyn...
Article
Due to the increasing number of ecosystem invasions with the introduction of exogenous species via ballast water, the International Maritime Organization adopted the Ballast Water Convention (BWMC). The BWMC establishes standards for the concentration of viable organisms in a ballast water discharge. Ultraviolet (UV) irradiation is commonly used fo...
Article
Full-text available
Polyunsaturated aldehydes (PUAs) are bioactive molecules suggested as chemical defenses and infochemicals. In marine coastal habitats, diatoms reach high PUA production levels during bloom episodes. Two fractions of PUA can usually be analyzed: pPUA obtained via artificial breakage of collected phytoplankton cells and dissolved PUA already released...
Article
Meeting the recent biological standards established by the Ballast Water Management Convention requires the application of ballast water treatment systems; ultraviolet irradiation is a frequently used option. However, organisms can repair the damage caused by ultraviolet irradiation primarily with photo-repair mechanisms that are dependent on the a...
Article
Over the years, industrial activities that generate high salinity effluents have been intensifying; this has relevant potential for causing organic and microbiological pollution which damages both human and ocean health. The development of new regulations, such as ballast water convention, encourage the development of treatment systems that can be...
Article
Full-text available
Ballast water in ocean transportation is an important vector for species transferring between areas not connected naturally. Ultraviolet irradiation is a common treatment to inactivate organisms in ballast water. A primary disadvantage inherent to ultraviolet treatment is photoreactivation. This study evaluates the possibility to enhance the effica...
Article
Full-text available
Industrial and commercial activities may require seawater disinfection for which ultraviolet irradiation is a widely used technology. Ultraviolet devices are commonly used in laboratory to evaluate the disinfection efficacy, looking for the highest control of the experimental conditions such as collimated beam reactor or continuous flow reactors wi...
Article
Assessing the disinfection of ballast water and its compliance with international standards requires determining the size, viability, and concentration of planktonic organisms. The FlowCAM (Flow Cytometer and Microscope) is an Imaging Flow Cytometry designed to obtain the particle concentration, images, and quantitative morphologic information. The...
Article
Water contained on ships is employed in the majority of activities on a vessel; therefore, it is necessary to correctly manage through marine water treatments. Among the main water streams generated on vessels, ballast water appears to be an emerging global challenge (especially on cargo ships) due to the transport of invasive species and the signi...
Article
Full-text available
Ultraviolet disinfection is a frequent option for eliminating viable organisms in ballast water to fulfill international and national regulations. The objective of this work is to evaluate the reduction of microalgae able to reproduce after UV irradiation, based on their growth features. A monoculture of microalgae Tisochrysis lutea was irradiated...
Conference Paper
In the most of the cases the organisms released by ballast water have found a way that enables them to develop and grow into a new habitat, becoming invasive species. It can generate large impacts, endangering the ecosystem and human activities. The port of Algeciras, a leading global port, assumes great importance in this aspect. Due to its strate...
Article
Background Ultraviolet disinfection systems used for treating ballast water have several strict requirements such as short exposure time or high disinfection efficacy. Disinfection can be enhanced by a photocatalytic system triggered by ultraviolet light, leading to a reduction in the exposure time necessary and thus a general improvement in the tr...
Article
Community metabolism plays a crucial role in the carbon dynamics of continental aquatic ecosystems. In the present work, two Mediterranean reservoirs (Southern Spain) with different trophic status were monitored during the stratified phase over two consecutive years (2009 and 2010) to evaluate community metabolic dynamics and potential controlling...
Conference Paper
En las últimas décadas se ha puesto de manifiesto la importancia del papel de los lagos y embalses dentro del ciclo global del carbono. Estos sistemas procesan grandes cantidades de carbono procedente tanto de la atmósfera como de la propia cuenca. De forma general, pueden comportarse como fuentes o sumideros de este elemento. El metabolismo de la...

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Projects

Projects (2)
Project
"Harmful algal blooms" (HABs) are globally increasing in both frequency and magnitude. Unusual climatic conditions together with the high rates of nutrient release seem to be the main cause’s events. In parallel, the growth of industrial activity in coastal locations together with maritime transport can raise the probability of HABs in these areas. Water resources must be managed in treatment plants prior to consumption or dumping. To the date, conventional treatment systems for drinking water (and/or wastewater) have been focused on the reduction load of organic matter and the disinfection of pathogens. Disinfection also takes a special interest in treatments implemented in the aquaculture industry or for ballast water management systems. The main goal of the project is to investigate technological processes that support the discharge standards associated with HABs. Different Advanced Oxidation Processes (AOPs) will be evaluated. It will evaluate, optimize, and improve well-implemented processes for the oxidation/disinfection of water (such as UV radiation) so that they can be easily implemented in water treatment plants.