Agricultural and Biological Sciences, Soil Science, Environmental Science
41
Scopus Publications
Scopus Publications
Phragmites australis and Scirpus holoschoenus for metal(loid)s polluted groundwater remediation: a wetland mesocosm study with different exposure regimes Aqib Hassan Ali Khan, Alberto Soto-Cañas, Carlos Rad, Andrea Martin-Pablo, Blanca Velasco-Arroyo, Dalia de la Fuente-Vivas, Laura Gómez-Cuadrado, Gonzalo Salazar-Mardones, Herwig De Wilde, Alfredo Pérez-de-Mora, Rocío Barros Journal of Hazardous Materials, 2026 Mitigation of pollutants is crucial for long-term sustainable management of groundwater and freshwater systems and ecosystem health. However, the potential of nature-based attenuation strategies, such as phytoremediation, in the presence of multi-element contamination and under changing exposure conditions, remains largely unexplored. This study aimed to comprehensively assess the potential of Phragmites australis and Scirpus holoschoenus for metal(loid) remediation in contaminated groundwater. The investigation involved both medium (4 L) static and large dynamic (65 L) mesocosms to simulate different exposure conditions, including abrupt (acute), and continuous (progressive and chronic), with a particular focus on reducing overall metal(loid) toxicity. Dynamic mesocosm results demonstrated that both macrophytes corrected water pH from 3.7 to 7.6, and significantly reduced Ni, Fe, and Cu, which initially exceeded the Flemish regulatory limits by up to 3182-fold. Additionally, P. australis exhibited superior bioenergy potential, with higher heating values (HHV) reaching up to 17.15 MJ kg⁻¹. Metal uptake followed a clear phytostabilization trend for Al, Cu, Fe, Ni, and Zn. Most notably, macrophytes assisted phytoremediation restored the HepG2 cell viability from 0% to over 75%, indicating an effective neutralization of polluted groundwater toxicity. In conclusion, this study demonstrated the potential of phytoremediation using P. australis and S. holoschoenus as sustainable strategy for contaminated water treatment, providing simultaneous benefits of metalloids removal, toxicity reduction, and the valorization of biomass for bioenergy applications. • Metal(loid)s polluted groundwater phytoremediation in different regimes was studied. • P. australis and S. holoschoenus performed phytostabilization of metal(loid)s. • Mesocosms neutralized water pH (3.7 to 7.6), promoting to metal immobilization. • Treated water restored the HepG2 cell viability, hence reducing health risk. • Both plants showed higher tolerance and biomass in chronic exposure.
Hyperspectral Images of Vine Leaves Treated with Antifungal Products Ramón Sánchez, Carlos Rad, Carlos Cambra, Rocío Barros, Álvaro Herrero Data, 2026 Hyperspectral imagery provides detailed insights for vineyard vegetation assessment, enabling improved pesticide management within precision agriculture. For this reason, the dataset presented here includes hyperspectral images acquired from grapevine leaves treated with two copper-based formulations: ZZ Cuprocol (containing 70% w/v copper oxychloride) and Cuprantol Duo (composed of 14% w/w copper oxychloride and 14% w/w copper hydroxide). In addition, a commonly used contact pesticide in both intensive and traditional viticulture, Folpet—free of copper but containing sulfur and chlorine—was also evaluated in its commercial formulation Vitipec Azul (Cimoxanil 6% w/w, Folpet 37.5% w/w, Ascenza, Portugal). For each product, six different dilution levels were prepared along with a distilled water control. Leaf samples were collected and analyzed during the 2023 growing season from three shoot locations (basal, middle, and apical) and from both orientations of the vine canopy: east and west. Following pesticide treatment, leaf hyperspectral images were captured using a 300-band Pika L camera (Resonon, Bozeman, MT, USA), mounted on a mechanical scanning platform synchronized with the imaging system.
Detecting copper-based fungicides in vineyards by means of hyperspectral imagery Ramón Sánchez, Carlos Rad, Carlos Cambra, Rocío Barros, Álvaro Herrero Smart Agricultural Technology, 2025 Fungal diseases affecting vineyards are commonly controlled using copper-based fungicides. Inaccurate application of these products usually leads to accumulations of copper in the soil. The use of spectral images in vineyards is a tool that can help in the correct application of fungicides to improve their efficiency and effectiveness. To do that, a solution is required to identify the copper deposited on the vine leaf. To bridge this gap, the present work compares images obtained with a hyperspectral camera (Pika L, Resonon) of vineyard leaves ( Vitis vinifera L.) cv. Tempranillo treated with two copper-based products, Cuprantol duo (Syngenta, CH) and Cuprocol (Syngenta, CH). Treated leaves with both products and the corresponding blanks made with distilled water were compared. Most of the differences between treatments and products are found in the near-infrared region (700-740 nm), the green region (550 nm) and the region of (620-640 nm). Maximal spectral variations appeared in the range of 711.16-758.27 nm for wet status products, which allowed to differentiate between the areas treated with copper-based products from the blanks without product. We can conclude that using hyperspectral imagery is possible to detect leave areas treated with copper-based fungicides immediately (wet treatment) after application.
SEM-EDS and hyperspectral images of vine leaves treated with antifungal products Ramón Sánchez, Carlos Rad, Carlos Cambra, M.P. Castroviejo, Rocío Barros, Álvaro Herrero Data in Brief, 2025 Scanning electron microscope, better known by its acronym as SEM, is a very useful technique for obtaining high-resolution images of the surface of a sample. Hyperspectral imaging provides precise information for analysing vineyard vegetation that could help in improving pesticide application in precision viticulture technics. The present dataset is based on images of vineyard leaves, taken with both technics. The leaves of the cv. Tempranillo, proceeding from a vineyard located inside of the Cigales Denomination of Origin, in north-central Spain, were treated with two Cu-containing products: ZZ Cuprocol (70 % w/v copper oxychloride) and Cuprantol Duo (14 % w/w copper oxychloride, 14 % w/w copper hydroxide). In addition, a contact pesticide widely used in intensive and traditional viticulture based on Folpet, copper-free but containing sulphur and chlorine, has been tested in its commercial form, Vitipec Blue (Cymoxanil 6 % w/w, Folpet 37.5 % w/w, Ascenza, PT). Three dilutions were prepared, one of each compound, at the actual field application concentration of 1.33 g/L. The leaves were sampled and processed during the 2023 season. These leaves were taken from the central part of representative shoots of the vine canopy, with east and west exposures. After the application of the pesticide dilutions, images of the leaves were taken with a 300-channel hyperspectral camera (Pika L, Resonon) using a mechanical bench synchronized with the camera. Then the SEM analysis was carried after prepare the samples. Hence, such imagery is provided in the present dataset, based on the images taken from the leaves with both technics.
Macrophyte assisted phytoremediation and toxicological profiling of metal(loid)s polluted water is influenced by hydraulic retention time Aqib Hassan Ali Khan, Alberto Soto-Cañas, Carlos Rad, Sandra Curiel-Alegre, Carlos Rumbo, Blanca Velasco-Arroyo, Herwig de Wilde, Alfredo Pérez-de-Mora, Sonia Martel-Martín, Rocío Barros Environmental Science and Pollution Research, 2025 The present study reports findings related to the treatment of polluted groundwater using macrophyte-assisted phytoremediation. The potential of three macrophyte species (Phragmites australis, Scirpus holoschoenus, and Typha angustifolia) to tolerate exposure to multi-metal(loid) polluted groundwater was first evaluated in mesocosms for 7- and 14-day batch testing. In the 7-day batch test, the polluted water was completely replaced and renewed after 7 days, while for 14 days exposure, the same polluted water, added in the first week, was maintained. The initial biochemical screening results of macrophytes indicated that the selected plants were more tolerant to the provided conditions with 14 days of exposure. Based on these findings, the plants were exposed to HRT regimes of 15 and 30 days. The results showed that P. australis and S. holoschoenus performed better than T. angustifolia, in terms of metal(loid) accumulation and removal, biomass production, and toxicity reduction. In addition, the translocation and compartmentalization of metal(loid)s were dose-dependent. At the 30-day loading rate (higher HRT), below-ground phytostabilization was greater than phytoaccumulation, whereas at the 15-day loading rate (lower HRT), below- and above-ground phytoaccumulation was the dominant metal(loid) removal mechanism. However, higher levels of toxicity were noted in the water at the 15-day loading rate. Overall, this study provides valuable insights for macrophyte-assisted phytoremediation of polluted (ground)water streams that can help to improve the design and implementation of phytoremediation systems.
Bioaugmentation and vermicompost facilitated the hydrocarbon bioremediation: scaling up from lab to field for petroleum-contaminated soils Sandra Curiel-Alegre, Aqib Hassan Ali Khan, Carlos Rad, Blanca Velasco-Arroyo, Carlos Rumbo, Rafael Rivilla, David Durán, Miguel Redondo-Nieto, Eduard Borràs, Daniele Molognoni, Soledad Martín-Castellote, Blanca Juez, Rocío Barros Environmental Science and Pollution Research, 2025 The biodegradation of total petroleum hydrocarbon (TPH) in soil is very challenging due to the complex recalcitrant nature of hydrocarbon, hydrophobicity, indigenous microbial adaptation and competition, and harsh environmental conditions. This work further confirmed that limited natural attenuation of petroleum hydrocarbons (TPHs) (15% removal) necessitates efficient bioremediation strategies. Hence, a scaling-up experiment for testing and optimizing the use of biopiles for bioremediation of TPH polluted soils was conducted with three 500-kg pilots of polluted soil, and respective treatments were implemented: including control soil (CT), bioaugmentation and vermicompost treatment (BAVC), and a combined application of BAVC along with bioelectrochemical snorkels (BESBAVC), all maintained at 40% field capacity. This study identified that at pilot scale level, a successful application of BAVC treatment can achieve 90.3% TPH removal after 90 days. BAVC’s effectiveness stemmed from synergistic mechanisms. Introduced microbial consortia were capable of TPH degradation, while vermicompost provided essential nutrients, enhanced aeration, and, potentially, acted as a biosorbent. Hence, it can be concluded that the combined application of BAVC significantly enhances TPH removal compared to natural attenuation. While the combined application of a bioelectrochemical snorkel (BES) with BAVC also showed a significant TPH removal, it did not differ statistically from the individual application of BAVC, under applied conditions. Further research is needed to optimize BES integration with BAVC for broader applicability. This study demonstrates BAVC as a scalable and mechanistically sound approach for TPH bioremediation in soil.
Optimizing sunflower yield: Understanding pollinator contribution to inform agri-environmental strategies Lucie Mota, João Loureiro, José A. González, Violeta Hevia, Jorge J. Ortega-Marcos, Carlos Rad, Evan A.N. Marks, Sílvia Castro Field Crops Research, 2024 The agricultural intensification due to global increased food demand has harmed pollinator communities worldwide. However, some of the economically most important oilseed crops, such as the sunflower, depend on pollinators to produce seeds. While self-fertile varieties have undergone genetic selection to guarantee productivity, the pollinator-dependence levels and the economic contribution of pollinators have not been fully estimated. Here, we aimed to explore floral and pollinator constraints limiting the agricultural yield of sunflower varieties most frequently used in the Iberian Peninsula. Pollination experiments were undertaken to analyse the pollinator-dependence level of 12 varieties under controlled conditions and also under natural conditions in 23 fields of two Spanish agricultural regions. The selfing ability and economic contribution of pollinators were estimated by comparing bagged and open-pollination treatments. Our results showed that the degree of pollinator-dependence is highly dependent on sunflower variety, with impacts on production and productivity outcomes, e.g. individual plant yield values varied between 0.188 and 0.692. Several varieties could self-fertilize and produce seeds regardless of pollinators. However, outcrossing significantly increased seed set in most varieties with increments up to 0.341. Overall, a trade-off between the number and weight of seeds was observed. Under natural field conditions, pollinators significantly increased overall sunflower production, although differences were observed among regions (increment of 275 kg/ha in Burgos and 382 kg/ha in Cuenca), with an associated economic outcome. The self-fertilization ability and the level of pollinator-dependence vary according to the intrinsic reproductive traits of the variety analysed. Although some varieties are able to produce seeds despite the absence of pollinators, the sunflower clearly benefits from insect pollination. The landscape context and the availability of pollinator communities influenced the final crop yield and the economic outcome. Combining landscape-restoring interventions with the cultivation of self-compatible varieties during at least the first years of implementation may be a solid additional agri-environmental strategy to maintain production levels and economic outcomes, which may particularly mitigate effects of pollinator and biodiversity losses mainly in highly simplified agroecosystems. • Global changes are threatening pollinator communities and food security. • Floral and pollinator constraints to sunflower productivity were quantified. • Pollinator-dependence varied by variety with a seed number and weight trade-off. • Pollinators significantly increased sunflower productivity and economic outcomes. • Agri-environmental strategies should consider self-fertile sunflower varieties.
Metal(loid) tolerance, accumulation, and phytoremediation potential of wetland macrophytes for multi-metal(loid)s polluted water Aqib Hassan Ali Khan, Blanca Velasco-Arroyo, Carlos Rad, Sandra Curiel-Alegre, Carlos Rumbo, Herwig de Wilde, Alfredo Pérez-de-Mora, Sonia Martel-Martín, Rocío Barros Environmental Science and Pollution Research, 2024 Natural based solutions, notably constructed/artificial wetland treatment systems, rely heavily on identification and use of macrophytes with the ability to tolerate multiple contaminants and grow for an extended period to reduce contamination. The potential to tolerate and remediate metal(loid) contaminated groundwater from an industrial site located in Flanders (Belgium) was assessed for 10 wetland macrophytes (including Carex riparia Curtis, Cyperus longus Baker, Cyperus rotundus L., Iris pseudacorus L., Juncus effusus L., Lythrum salicaria L., Mentha aquatica L., Phragmites australis Trin. ex Steud., Scirpus holoschoenus L., and Typha angustifolia L.). The experiment was conducted under static conditions, where plants were exposed to polluted acidic (pH ~ 4) water, having high level of metal(loid)s for 15 days. Plant biomass, morphology, and metal uptake by roots and shoots were analysed every 5 days for all species. Typha angustifolia and Scirpus holoschoenus produced ~ 3 and ~ 1.1 times more dried biomass than the controls, respectively. For S. holoschoenus, P. australis, and T. angustifolia, no apparent morphological stress symptoms were observed, and plant heights were similar between control and plants exposed to polluted groundwater. Higher concentrations of all metal(loid)s were detected in the roots indicating a potential for phytostabilization of metal(loid)s below the water column. For J. effusus and T. angustifolia, Cd, Ni, and Zn accumulation was observed higher in the shoots. S. holoschoenus, P. australis, and T. angustifolia are proposed for restoration and phytostabilization strategies in natural and/or constructed wetland and aquatic ecosystems affected by metal(loid) inputs. Graphical abstract
Unveiling the capacity of bioaugmentation application, in comparison with biochar and rhamnolipid for TPHs degradation in aged hydrocarbons polluted soil Sandra Curiel-Alegre, Dalia de la Fuente-Vivas, Aqib Hassan Ali Khan, Javier García-Tojal, Blanca Velasco-Arroyo, Carlos Rumbo, Gerhard Soja, Carlos Rad, Rocío Barros Environmental Research, 2024 Persistent, aged hydrocarbons in soil hinder remediation, posing a significant environmental threat. While bioremediation offers an environmentally friendly and cost-effective approach, its efficacy for complex contaminants relies on enhancing pollutant bioavailability. This study explores the potential of immobilized bacterial consortia combined with biochar and rhamnolipids to accelerate bioremediation of aged total petroleum hydrocarbon (TPH)-contaminated soil. Previous research indicates that biochar and biosurfactants can increase bioremediation rates, while mixed consortia offer sequential degradation and higher hydrocarbon mineralization. The present investigation aimed to assess whether combining these strategies could further enhance degradation in aged, complex soil matrices. The bioaugmentation (BA) with bacterial consortium increased the TPHs degradation in aged soil (over 20% compared to natural attenuation - NA). However, co-application of BA with biochar and rhamnolipid higher did not show a statistically prominent synergistic effect. While biochar application facilitated the maintenance of hydrocarbon degrading bacterial consortium in soil, the present study did not identify a direct influence in TPHs degradation. The biochar application in contaminated soil contributed to TPHs adsorption. Rhamnolipid alone slightly increased the TPHs biodegradation with NA, while the combined bioaugmentation treatment with rhamnolipid and biochar increased the degradation between 27.5 and 29.8%. These findings encourage further exploration of combining bioaugmentation with amendment, like biochar and rhamnolipid, for remediating diverse environmental matrices contaminated with complex and aged hydrocarbons.
Phytostabilization of metal(loid)s by ten emergent macrophytes following a 90-day exposure to industrially contaminated groundwater Blanca Velasco-Arroyo, Sandra Curiel-Alegre, Aqib Hassan Ali Khan, Carlos Rumbo, Daniel Pérez-Alonso, Carlos Rad, Herwig De Wilde, Alfredo Pérez-de-Mora, Rocío Barros New Biotechnology, 2024 Better understanding of macrophyte tolerance under long exposure times in real environmental matrices is crucial for phytoremediation and phytoattenuation strategies for aquatic systems. The metal(loid) attenuation ability of 10 emergent macrophyte species (Carex riparia, Cyperus longus, Cyperus rotundus, Iris pseudacorus, Juncus effusus, Lythrum salicaria, Menta aquatica, Phragmites australis, Scirpus holoschoenus, and Typha angustifolia) was investigated using real groundwater from an industrial site, over a 90-day exposure period. A "phytobial" treatment was included, with 3 plant growth-promoting rhizobacterial strains. Plants exposed to the polluted water generally showed similar or reduced aerial biomass compared to the controls, except for C. riparia. This species, along with M. aquatica, exhibited improved biomass after bioaugmentation. Phytoremediation mechanisms accounted for more than 60% of As, Cd, Cu, Ni, and Pb removal, whilst abiotic mechanisms contributed to ∼80% removal of Fe and Zn. Concentrations of metal(loid)s in the roots were generally between 10-100 times higher than in the aerial parts. The macrophytes in this work can be considered "underground attenuators", more appropriate for rhizostabilization strategies, especially L. salicaria, M. aquatica, S. holoschoenus, and T. angustifolia. For I. pseudacorus, C. longus, and C. riparia; harvesting the aerial parts could be a complementary phytoextraction approach to further remove Pb and Zn. Of all the plants, S. holoschoenus showed the best balance between biomass production and uptake of multiple metal(loid)s. Results also suggest that multiple phytostrategies may be possible for the same plant depending on the final remedial aim. Phytobial approaches need to be further assessed for each macrophyte species.
CropPol: A dynamic, open and global database on crop pollination Alfonso Allen‐Perkins, Ainhoa Magrach, Matteo Dainese, Lucas A. Garibaldi, David Kleijn, Romina Rader, James R. Reilly, Rachael Winfree, Ola Lundin, Carley M. McGrady, Claire Brittain, David J. Biddinger, Derek R. Artz, Elizabeth Elle, George Hoffman, James D. Ellis, Jaret Daniels, Jason Gibbs, Joshua W. Campbell, Julia Brokaw, Julianna K. Wilson, Keith Mason, Kimiora L. Ward, Knute B. Gundersen, Kyle Bobiwash, Larry Gut, Logan M. Rowe, Natalie K. Boyle, Neal M. Williams, Neelendra K. Joshi, Nikki Rothwell, Robert L. Gillespie, Rufus Isaacs, Shelby J. Fleischer, Stephen S. Peterson, Sujaya Rao, Theresa L. Pitts‐Singer, Thijs Fijen, Virginie Boreux, Maj Rundlöf, Blandina Felipe Viana, Alexandra‐Maria Klein, Henrik G. Smith, Riccardo Bommarco, Luísa G. Carvalheiro, Taylor H. Ricketts, Jaboury Ghazoul, Smitha Krishnan, Faye E. Benjamin, João Loureiro, Sílvia Castro, Nigel E. Raine, Gerard Arjen de Groot, Finbarr G. Horgan, Juliana Hipólito, Guy Smagghe, Ivan Meeus, Maxime Eeraerts, Simon G. Potts, Claire Kremen, Daniel García, Marcos Miñarro, David W. Crowder, Gideon Pisanty, Yael Mandelik, Nicolas J. Vereecken, Nicolas Leclercq, Timothy Weekers, Sandra A. M. Lindstrom, Dara A. Stanley, Carlos Zaragoza‐Trello, Charlie C. Nicholson, Jeroen Scheper, Carlos Rad, Evan A. N. Marks, Lucie Mota, Bryan Danforth, Mia Park, Antônio Diego M. Bezerra, Breno M. Freitas, Rachel E. Mallinger, Fabiana Oliveira da Silva, Bryony Willcox, Davi L. Ramos, Felipe D. da Silva e Silva, Amparo Lázaro, David Alomar, Miguel A. González‐Estévez, Hisatomo Taki, Daniel P. Cariveau, Michael P. D. Garratt, Diego N. Nabaes Jodar, Rebecca I. A. Stewart, Daniel Ariza, Matti Pisman, Elinor M. Lichtenberg, Christof Schüepp, Felix Herzog, Martin H. Entling, Yoko L. Dupont, Charles D. Michener, Gretchen C. Daily, Paul R. Ehrlich, Katherine L. W. Burns, Montserrat Vilà, Andrew Robson, Brad Howlett, Leah Blechschmidt, Frank Jauker, Franziska Schwarzbach, Maike Nesper, Tim Diekötter, Volkmar Wolters, Helena Castro, Hugo Gaspar, Brian A. Nault, Isabelle Badenhausser, Jessica D. Petersen, Teja Tscharntke, Vincent Bretagnolle, D. Susan Willis Chan, Natacha Chacoff, Georg K. S. Andersson, Shalene Jha, Jonathan F. Colville, Ruan Veldtman, Jeferson Coutinho, Felix J. J. A. Bianchi, Louis Sutter, Matthias Albrecht, Philippe Jeanneret, Yi Zou, Anne L. Averill, Agustin Saez, Amber R. Sciligo, Carlos H. Vergara, Elias H. Bloom, Elisabeth Oeller, Ernesto I. Badano, Gregory M. Loeb, Heather Grab, Johan Ekroos, Vesna Gagic, Saul A. Cunningham, Jens Åström, Pablo Cavigliasso, Alejandro Trillo, Alice Classen, Alice L. Mauchline, Ana Montero‐Castaño, Andrew Wilby, Ben A. Woodcock, C. Sheena Sidhu, Ingolf Steffan‐Dewenter, Ioannis N. Vogiatzakis, José M. Herrera, Mark Otieno, Mary W. Gikungu, Sarah J. Cusser, Thomas Nauss, Lovisa Nilsson, Jessica Knapp, Jorge J. Ortega‐Marcos, José A. González, Juliet L. Osborne, Rosalind Blanche, Rosalind F. Shaw, Violeta Hevia, Jane Stout, Anthony D. Arthur, Betina Blochtein, Hajnalka Szentgyorgyi, Jin Li, Margaret M. Mayfield, Michał Woyciechowski, Patrícia Nunes‐Silva, Rosana Halinski de Oliveira, Steve Henry, Benno I. Simmons, Bo Dalsgaard, Katrine Hansen, Tuanjit Sritongchuay, Alison D. O'Reilly, Fermín José Chamorro García, Guiomar Nates Parra, Camila Magalhães Pigozo, Ignasi Bartomeus Ecology, 2022