Olga Freitas

1.3k total citations
31 papers, 1.1k citations indexed

About

Olga Freitas is a scholar working on Water Science and Technology, Pollution and Industrial and Manufacturing Engineering. According to data from OpenAlex, Olga Freitas has authored 31 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Water Science and Technology, 10 papers in Pollution and 8 papers in Industrial and Manufacturing Engineering. Recurrent topics in Olga Freitas's work include Adsorption and biosorption for pollutant removal (18 papers), Pharmaceutical and Antibiotic Environmental Impacts (7 papers) and Phosphorus and nutrient management (6 papers). Olga Freitas is often cited by papers focused on Adsorption and biosorption for pollutant removal (18 papers), Pharmaceutical and Antibiotic Environmental Impacts (7 papers) and Phosphorus and nutrient management (6 papers). Olga Freitas collaborates with scholars based in Portugal, Poland and Spain. Olga Freitas's co-authors include Sónia A. Figueiredo, Cristina Delerue‐Matos, Wojciech Stawiński, Agnieszka Węgrzyn, Rui A.R. Boaventura, Lucjan Chmielarz, Ramiro José Espinheira Martins, Grzegorz Mordarski, Artur Błachowski and Lúcia H.M.L.M. Santos and has published in prestigious journals such as The Science of The Total Environment, Water Research and Journal of Hazardous Materials.

In The Last Decade

Olga Freitas

30 papers receiving 1000 citations

Peers

Olga Freitas

WST

POLLU

IME

Sónia A. Figueiredo Portugal

Farid Mzee Mpatani China

Tasrin Shahnaz India

Samya Mohammad Egypt

Carla Bastos Vidal Brazil

Milan Kragović Serbia

Evans Dovi China

Ali Rıza Kul Türkiye

Zahra Sadaoui Algeria

Jonathan L. Talbott United States

Sónia A. Figueiredo Portugal

Olga Freitas

545 ×0.8

WST

162 ×0.8

193 ×1.0

319 ×1.7

POLLU

171 ×1.0

IME

Citations per year, relative to Olga Freitas Olga Freitas (= 1×) peers Sónia A. Figueiredo

Countries citing papers authored by Olga Freitas

Since Specialization

Citations

This map shows the geographic impact of Olga Freitas's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Olga Freitas with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Olga Freitas more than expected).

Fields of papers citing papers by Olga Freitas

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Olga Freitas. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Olga Freitas. The network helps show where Olga Freitas may publish in the future.

Co-authorship network of co-authors of Olga Freitas

This figure shows the co-authorship network connecting the top 25 collaborators of Olga Freitas. A scholar is included among the top collaborators of Olga Freitas based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Olga Freitas. Olga Freitas is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Freitas, Olga, et al.. (2025). A comprehensive review on valorization of chestnut processing wastes into bio‐based composites and bioplastics. Polymer Composites. 46(9). 7838–7857. 2 indexed citations

Freitas, Olga, Elsa F. Vieira, A. Gomes, et al.. (2025). Eco-Friendly Biocomposites from Chestnut Waste: Production, Optimization, Characterization, and Application. Polymers. 17(5). 616–616. 1 indexed citations

Figueiredo, Sónia A., et al.. (2022). Fluoxetine and Nutrients Removal from Aqueous Solutions by Phycoremediation. International Journal of Environmental Research and Public Health. 19(10). 6081–6081. 9 indexed citations

Hultberg, Malin, et al.. (2022). Fluoxetine Removal from Aqueous Solutions Using a Lignocellulosic Substrate Colonized by the White-Rot Fungus Pleurotus ostreatus. International Journal of Environmental Research and Public Health. 19(5). 2672–2672. 5 indexed citations

Węgrzyn, Agnieszka, Stefan Witkowski, Olga Freitas, et al.. (2022). Vermiculite as a potential functional additive for water treatment bioreactors inhibiting toxic action of heavy metal cations upsetting the microbial balance. Journal of Hazardous Materials. 433. 128812–128812. 8 indexed citations

Correia‐Sá, Luísa, Cristina Soares, Olga Freitas, et al.. (2021). A Three-Dimensional Electrochemical Process for the Removal of Carbamazepine. Applied Sciences. 11(14). 6432–6432. 22 indexed citations

Stawiński, Wojciech, et al.. (2019). Adsorption of Fluoxetine and Venlafaxine onto the Marine Seaweed Bifurcaria bifurcata. Environmental Engineering Science. 36(5). 573–582. 25 indexed citations

Stawiński, Wojciech, et al.. (2018). Application of vermiculite-derived sustainable adsorbents for removal of venlafaxine. Environmental Science and Pollution Research. 25(17). 17066–17076. 23 indexed citations

Stawiński, Wojciech, Agnieszka Węgrzyn, Grzegorz Mordarski, et al.. (2018). Sustainable adsorbents formed from by-product of acid activation of vermiculite and leached-vermiculite-LDH hybrids for removal of industrial dyes and metal cations. Applied Clay Science. 161. 6–14. 35 indexed citations

10.

Stawiński, Wojciech, et al.. (2017). Acid-base treated vermiculite as high performance adsorbent: Insights into the mechanism of cationic dyes adsorption, regeneration, recyclability and stability studies. Chemosphere. 173. 107–115. 88 indexed citations

11.

Stawiński, Wojciech, Agnieszka Węgrzyn, Olga Freitas, Lucjan Chmielarz, & Sónia A. Figueiredo. (2017). Dual-function hydrotalcite-derived adsorbents with sulfur storage properties: Dyes and hydrotalcite fate in adsorption-regeneration cycles. Microporous and Mesoporous Materials. 250. 72–87. 24 indexed citations

12.

Stawiński, Wojciech, Olga Freitas, Lucjan Chmielarz, et al.. (2016). The influence of acid treatments over vermiculite based material as adsorbent for cationic textile dyestuffs. Chemosphere. 153. 115–129. 49 indexed citations

13.

Stawiński, Wojciech, Agnieszka Węgrzyn, Olga Freitas, et al.. (2016). Simultaneous removal of dyes and metal cations using an acid, acid-base and base modified vermiculite as a sustainable and recyclable adsorbent. The Science of The Total Environment. 576. 398–408. 70 indexed citations

14.

Soares, Andrey, et al.. (2013). Copper, nickel and zinc removal by peanut hulls: batch and column studies in mono, tri-component systems and with real effluent. Global NEST Journal. 12(2). 206–214. 19 indexed citations

15.

Sousa, João, et al.. (2013). Basic dyestuffs removal from textile effluents using feathers: equilibrium, kinetic and column studies. Global NEST Journal. 14(1). 100–107. 6 indexed citations

16.

Pitrez, Patrícia R., et al.. (2012). Influence of the pre-treatments on the properties of biodegradable films from bovine hair. The Scientific Repository of the Polytechnic Institute of Porto (Polytechnic Institute of Porto).

17.

Freitas, Olga, Cristina Delerue‐Matos, & Rui A.R. Boaventura. (2009). Optimization of Cu(II) biosorption onto Ascophyllum nodosum by factorial design methodology. Journal of Hazardous Materials. 167(1-3). 449–454. 26 indexed citations

18.

Freitas, Olga, Ramiro José Espinheira Martins, Cristina Delerue‐Matos, & Rui A.R. Boaventura. (2007). Removal of Cd(II), Zn(II) and Pb(II) from aqueous solutions by brown marine macro algae: Kinetic modelling. Journal of Hazardous Materials. 153(1-2). 493–501. 145 indexed citations

19.

Silva, Aurora, et al.. (2006). The Periodic Table: Contest and Exhibition. Journal of Chemical Education. 83(4). 557–557. 4 indexed citations

20.

Freitas, Olga, et al.. (1999). Reactive dyes removal from wastewaters by adsorption on eucalyptus bark: variables that define the process. Water Research. 33(4). 979–988. 246 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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