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Lobel B, Baiocco D, Al-Sharabi M, Routh AF, Zhang Z, Cayre OJ. Current Challenges in Microcapsule Designs and Microencapsulation Processes: A Review. ACS APPLIED MATERIALS & INTERFACES 2024; 16:40326-40355. [PMID: 39042830 PMCID: PMC11311140 DOI: 10.1021/acsami.4c02462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 07/03/2024] [Accepted: 07/09/2024] [Indexed: 07/25/2024]
Abstract
Microencapsulation is an advanced methodology for the protection, preservation, and/or delivery of active materials in a wide range of industrial sectors, such as pharmaceuticals, cosmetics, fragrances, paints, coatings, detergents, food products, and agrochemicals. Polymeric materials have been extensively used as microcapsule shells to provide appropriate barrier properties to achieve controlled release of the encapsulated active ingredient. However, significant limitations are associated with such capsules, including undesired leaching and the nonbiodegradable nature of the typically used polymers. In addition, the energy cost of manufacturing microcapsules is an important factor to be considered when designing microcapsule systems and the corresponding production processes. Recent factors linked to UN sustainability goals are modifying how such microencapsulation systems should be designed in pursuit of "ideal" microcapsules that are efficient, safe, cost-effective and environmentally friendly. This review provides an overview of advances in microencapsulation, with emphasis on sustainable microcapsule designs. The key evaluation techniques to assess the biodegradability of microcapsules, in compliance with recently evolving European Union requirements, are also described. Moreover, the most common methodologies for the fabrication of microcapsules are presented within the framework of their energy demand. Recent promising microcapsule designs are also highlighted for their suitability toward meeting current design requirements and stringent regulations, tackling the ongoing challenges, limitations, and opportunities.
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Affiliation(s)
- Benjamin
T. Lobel
- School
of Chemical and Process Engineering, University
of Leeds, Woodhouse LS2 9JT, United Kingdom
| | - Daniele Baiocco
- School
of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Mohammed Al-Sharabi
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United
Kingdom
| | - Alexander F. Routh
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United
Kingdom
| | - Zhibing Zhang
- School
of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Olivier J. Cayre
- School
of Chemical and Process Engineering, University
of Leeds, Woodhouse LS2 9JT, United Kingdom
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2
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Huang B, Chen G, Zhang H, Hou G, Radenkovic M. Instant deep sea debris detection for maneuverable underwater machines to build sustainable ocean using deep neural network. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 878:162826. [PMID: 36996973 DOI: 10.1016/j.scitotenv.2023.162826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 02/07/2023] [Accepted: 03/09/2023] [Indexed: 05/13/2023]
Abstract
Deep sea debris is any persistent man-made material that ends up in the deep sea. The scale and rapidly increasing amount of sea debris are endangering the health of the ocean. So, many marine communities are struggling for the objective of a clean, healthy, resilient, safe, and sustainably harvested ocean. That includes deep sea debris removal with maneuverable underwater machines. Previous studies have demonstrated that deep learning methods can successfully extract features from seabed images or videos, and are capable of identifying and detecting debris to facilitate debris collection. In this paper, the lightweight neural network (termed DSDebrisNet), which can leverage the detection speed and identification performance to achieve instant detection with high accuracy, is proposed to implement compound-scaled deep sea debris detection. In DSDebrisNet, a hybrid loss function considering the illumination and detection problem was also introduced to improve performance. In addition, the DSDebris dataset is constructed by extracting images and video frames from the JAMSTEC dataset and labeled using a graphical image annotation tool. The experiments are implemented on the deep sea debris dataset, and the results indicate that the proposed methodology can achieve promising detection accuracy in real-time. The in-depth study also provides significant evidence for the successful extension branch of artificial intelligence to the deep sea research domain.
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Affiliation(s)
- Baoxiang Huang
- School of Computer Science and Technology, Qingdao University, China; Laboratory for Regional Oceanography and Numerical Modeling, Laoshan Laboratory, China
| | - Ge Chen
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, School of Marine Technology, Ocean University of China, China; Laboratory for Regional Oceanography and Numerical Modeling, Laoshan Laboratory, China.
| | - Hongfeng Zhang
- School of Computer Science and Technology, Qingdao University, China
| | - Guojia Hou
- School of Computer Science and Technology, Qingdao University, China
| | - Milena Radenkovic
- School of Computer Science and Information Technology, The University of Nottingham, United Kingdom
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Pinheiro M, Martins I, Raimundo J, Caetano M, Neuparth T, Santos MM. Stressors of emerging concern in deep-sea environments: microplastics, pharmaceuticals, personal care products and deep-sea mining. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 876:162557. [PMID: 36898539 DOI: 10.1016/j.scitotenv.2023.162557] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 02/16/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
Although most deep-sea areas are remote in comparison to coastal zones, a growing body of literature indicates that many sensitive ecosystems could be under increased stress from anthropogenic sources. Among the multiple potential stressors, microplastics (MPs), pharmaceuticals and personal care products (PPCPs/PCPs) and the imminent start of commercial deep-sea mining have received increased attention. Here we review recent literature on these emerging stressors in deep-sea environments and discuss cumulative effects with climate change associated variables. Importantly, MPs and PPCPs have been detected in deep-sea waters, organisms and sediments, in some locations in comparable levels to coastal areas. The Atlantic Ocean and the Mediterranean Sea are the most studied areas and where higher levels of MPs and PPCPs have been detected. The paucity of data for most other deep-sea ecosystems indicates that many more locations are likely to be contaminated by these emerging stressors, but the absence of studies hampers a better assessment of the potential risk. The main knowledge gaps in the field are identified and discussed, and future research priorities are highlighted to improve hazard and risk assessment.
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Affiliation(s)
- Marlene Pinheiro
- CIIMAR/CIMAR-LA - Interdisciplinary Centre of Marine and Environmental Research, Avenida General Norton de Matos S/N, 4450-208 Matosinhos, Portugal; FCUP - Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre S/N, 4169-007 Porto, Portugal
| | - Irene Martins
- CIIMAR/CIMAR-LA - Interdisciplinary Centre of Marine and Environmental Research, Avenida General Norton de Matos S/N, 4450-208 Matosinhos, Portugal
| | - Joana Raimundo
- CIIMAR/CIMAR-LA - Interdisciplinary Centre of Marine and Environmental Research, Avenida General Norton de Matos S/N, 4450-208 Matosinhos, Portugal; IPMA - Portuguese Institute for Sea and Atmosphere, Avenida Alfredo Magalhães Ramalho 6, 1495-165 Algés, Portugal
| | - Miguel Caetano
- CIIMAR/CIMAR-LA - Interdisciplinary Centre of Marine and Environmental Research, Avenida General Norton de Matos S/N, 4450-208 Matosinhos, Portugal; IPMA - Portuguese Institute for Sea and Atmosphere, Avenida Alfredo Magalhães Ramalho 6, 1495-165 Algés, Portugal
| | - Teresa Neuparth
- CIIMAR/CIMAR-LA - Interdisciplinary Centre of Marine and Environmental Research, Avenida General Norton de Matos S/N, 4450-208 Matosinhos, Portugal.
| | - Miguel M Santos
- CIIMAR/CIMAR-LA - Interdisciplinary Centre of Marine and Environmental Research, Avenida General Norton de Matos S/N, 4450-208 Matosinhos, Portugal; FCUP - Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre S/N, 4169-007 Porto, Portugal.
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Nunes BZ, Moreira LB, Xu EG, Castro ÍB. A global snapshot of microplastic contamination in sediments and biota of marine protected areas. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 865:161293. [PMID: 36592906 DOI: 10.1016/j.scitotenv.2022.161293] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/14/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Microplastics (MPs) become ubiquitous contaminants in Marine Protected Areas (MPA) that have been planned as a conservation strategy. The present study provides a comprehensive overview of the occurrence, abundance, and distribution of MPs potentially affecting MPA worldwide. Data on MP occurrence and levels in sediment and biota samples were collected from recent peer-reviewed literature and screened using a GIS-based approach overlapping MP records with MPA boundaries. MPs were found in 186 MPAs, with levels ranging from 0 to 9187.5 items/kg in sediment and up to 17,461.9 items/kg in organisms. Peaked MPs concentrations occurred within multiple-use areas, and no-take MPAs were also affected. About half of MP levels found within MPA fell into the higher concentration quartiles, suggesting potential impacts on these areas. In general, benthic species were likely more affected than pelagic ones due to the higher concentrations of MP reported in the tissues of benthic species. Alarmingly, MPs were found in tissues of two threatened species on the IUCN Red List. The findings denote urgent concerns about the effectiveness of the global system of protected areas and their proposed conservation goals.
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Affiliation(s)
- Beatriz Zachello Nunes
- Programa de pós-graduação em Oceanologia (PPGO), Universidade Federal do Rio Grande (IO-FURG), Rio Grande, RS, Brazil
| | - Lucas Buruaem Moreira
- Instituto do Mar, Universidade Federal de São Paulo (IMAR -UNIFESP), Rua Maria Máximo, 168, 11030-100 Santos, SP, Brazil
| | - Elvis Genbo Xu
- Department of Biology, University of Southern Denmark, Odense 5230, Denmark
| | - Ítalo Braga Castro
- Programa de pós-graduação em Oceanologia (PPGO), Universidade Federal do Rio Grande (IO-FURG), Rio Grande, RS, Brazil; Instituto do Mar, Universidade Federal de São Paulo (IMAR -UNIFESP), Rua Maria Máximo, 168, 11030-100 Santos, SP, Brazil.
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Abelouah MR, Ben-Haddad M, Hajji S, De-la-Torre GE, Aziz T, Oualid JA, Banni M, Ait Alla A. Floating microplastics pollution in the Central Atlantic Ocean of Morocco: Insights into the occurrence, characterization, and fate. MARINE POLLUTION BULLETIN 2022; 182:113969. [PMID: 35905704 DOI: 10.1016/j.marpolbul.2022.113969] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/15/2022] [Accepted: 07/16/2022] [Indexed: 05/25/2023]
Abstract
This work presents preliminary results about abundance, distribution, characteristics, sources, and fate of microplastics (MPs) in the Central Atlantic Ocean (CAO) of Morocco. The investigation was conducted into three subsections, each characterized by different types of human activities and covering rural, village, and urban areas. MPs were detected in 100 % of the sampling sites. The abundances varied from 0.048 to 3.305 items/m3, with a mean abundance of 0.987 ± 1.081 items/m3. MPs abundance was higher in surface seawater linked to urban areas compared to village and rural areas. The dominant polymer type was polyester (PET-53.8 %) followed by polypropylene (PP-24.36 %), polyamide (PA-7.56 %), polystyrene (PS-6.88 %), polyvinyl chloride (PVC-2.64 %), ethylene vinyl acetate (EVA-2.60 %), polyetherurethane (PUR-1.36 %), and acrylic (AC-0.8 %). Fibers were the most dominant shapes accounting for over 50 %. MPs were mainly smaller than 2 mm in size (71 %) and characterized by colorful aspects. These findings suggested that wastewater treatment plant (WWTP) effluents and anthropogenic activities (industry, tourism, sanitation, and fishing) are the major pollution sources of MPs in the study area. SEM/EDX micrographs showed different weathering degrees and chemical elements adhered to the MPs surface.
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Affiliation(s)
- Mohamed Rida Abelouah
- Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
| | - Mohamed Ben-Haddad
- Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
| | - Sara Hajji
- Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
| | | | - Taoufyq Aziz
- Laboratoire Matériaux et Environnement (LME), Faculté des Sciences d'Agadir, Maroc, Morocco
| | - Jaouad Abou Oualid
- Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
| | - Mohamed Banni
- Laboratory of Biochemistry and Environmental Toxicology, Higher Institute of Agronomy, University of Sousse, Tunisia; University of Monastir, Higher Institute of Biotechnology of Monastir, Monastir, Tunisia
| | - Aicha Ait Alla
- Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco.
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Kukkola AT, Senior G, Maes T, Silburn B, Bakir A, Kröger S, Mayes AG. A large-scale study of microplastic abundance in sediment cores from the UK continental shelf and slope. MARINE POLLUTION BULLETIN 2022; 178:113554. [PMID: 35390630 DOI: 10.1016/j.marpolbul.2022.113554] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 03/04/2022] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
To inform risk assessments, reliable, time efficient and affordable quantification methods are required for creating a microplastic (MP) pollution baseline in the world's oceans. To facilitate this, MP abundance was investigated in sediments of three contrasting areas of the UK continental shelf: North West of Jones Bank, the Canyons in the Celtic Sea and Dogger Bank in the North Sea, utilising the Nile Red tagging method to assess its time efficiency and cost. Average MP abundance in the top 10 cm was 1050-2700 MP kg-1. MP abundance decreased with increasing sediment depth and increased with increasing water depth. The findings emphasise the extent of MP pollution and illustrate the value of Nile Red for large scale mapping at relatively low cost.
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Affiliation(s)
- A T Kukkola
- School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK; School of Geography, Earth and Environmental Sciences, University of Birmingham, B15 2TT, UK
| | - G Senior
- School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - T Maes
- GRID-Arendal, Teaterplassen 3, 4836 Arendal, Norway
| | - B Silburn
- Centre for Environment Fisheries and Aquaculture Science, Pakefield Road, Lowestoft NR33 0HT, UK
| | - A Bakir
- Centre for Environment Fisheries and Aquaculture Science, Pakefield Road, Lowestoft NR33 0HT, UK
| | - S Kröger
- Centre for Environment Fisheries and Aquaculture Science, Pakefield Road, Lowestoft NR33 0HT, UK
| | - A G Mayes
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
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