Browsing by Author "Schwantes, Daniel"
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- ItemAdsorbents developed from residual biomass of canola grains for the removal of lead from water(2020) Goncalves, A. C.; Braccini, A. L.; Schwantes, Daniel; Campagnolo, M. A.; Schiller, A. D.; Manfrin, J.; Conradi, E.; Zimmermann, J.
- ItemAdsorption of Cd (II), Pb (II) and Cr (III) on chemically modified Euterpe Oleracea biomass for the remediation of water pollution(UNIV ESTADUAL MARINGA, PRO-REITORIA PESQUISA POS-GRADUACAO, 2021) Goncalves Junior, Affonso Celso; Schwantes, Daniel; Conradi Junior, Elio; Zimmermann, Juliano; Coelho, Gustavo FerreiraThis study evaluated the use of Euterpe oleracea endocarp after chemical modification with H2O2, H2SO4 and NaOH for the removal of Cd2+, Pb2+ and Cr3+ from water. Therefore, the adsorbent was characterized for its chemical composition, Fourier Transform Infrared (FTIR) analysis, Scanning Electron Microscope (SEM) images, and pH of point of zero charge (pH(PZC)), thermal stability and porosimetry. Adsorption tests were conducted by using a Central Composite Design (CCD). Pseudo-first order, pseudosecond order, Elovich and intraparticle diffusion models evaluated the adsorption kinetics, and sorption isotherms were linearized according to Langmuir, Freundlich and Dubinin- Radushkevich. The effect of initial concentration, temperature in the process and the desorption were also analyzed. SEM results showed that the acai adsorbents (or CA) had irregular and heterogeneous structure, and IR analysis evidenced the presence of hydroxyl, aliphatic, phenolic and carboxylic surface groups; both analyses indicate favorable adsorption characteristics. The pHPZC of the adsorbent is 4.41, 4.02 and 7.10 for CA modified with H2O2, H2SO4 and NaOH, respectively. The optimum adsorption conditions were pH 5.0, within 40 min, with 4 g L-1 as the ideal adsorbent dose. The predominance of chemisorption occurs, in mono and multilayer. The adsorption is only spontaneous for Cd2+ at 15 and 25 degrees C. The CA has the potential to increase the removal efficiency of Cd, Pb and Cr, when chemically modified, particularly with H2O2 and H2SO4.
- ItemAtrazine fate in Rhodic Ferralsol grown with corn under high-intensity rainfall conditions(2023) Affonso Celso Gonçalves, Junior; Elio Conradi, Junior; Schwantes, Daniel; Vander Kaufmann; Alessandro Lucca Braccini; Tiago Roque Benetoli da Silva; Mario Aranda; Juliano Zimmermann
- ItemCanola meal‐derived activated biochar treated with NaOH and CO2 as an effective tool for Cd removal(2022) Affonso C Gonçalves, Jr; Schwantes, Daniel; Alessandro L Braccini; Francisco Albornoz; Élio Conradi, Jr; Juliano Zimmermann
- ItemCr(total) Removal Using Chicken Feathers Derived Materials: A Laboratory Study with Adsorption-precipitation in Electroplating Effluents(2022) Marcelo Angelo Campagnolo; Affonso Celso Gonçalves, Jr.; Schwantes, Daniel; Douglas Cardoso Dragunski; Tanicler Demetrio; Leonardo Henrique Deminski
- ItemDetermination of CHLORPYRIFOS by GC/ECD in water and its sorption mechanism study in a RHODIC FERRALSOL(2020) Schwantes, Daniel; Goncalves, A. C.; Conradi, E.; Campagnolo, M. A.; Zimmermann, J.
- ItemDevelopment of biochar and activated carbon from cigarettes wastes and their applications in Pb2+ adsorption(2021) Manfrin, Jessica; Goncalves Jr, Affonso Celso; Schwantes, Daniel; Conradi Jr, Elio; Zimmermann, Juliano; Ziemer, Guilherme Lindner
- ItemDevelopment of renewable adsorbent from cigarettes for lead removal from water(2019) Elio Conradi, Jr.; Affonso Celso Gonçalves, Jr.; Schwantes, Daniel; Jéssica Manfrin; Andréia Schiller; Juliano Zimmerman; Gabriel José Klassen; Guilherme Lindner Ziemer
- ItemDistribution of heavy metals in sediments and their bioaccumulation on benthic macroinvertebrates in a tropical Brazilian watershed(2021) Schwantes, Daniel; Goncalves Junior, Affonso Celso; Manfrin, Jessica; Campagnolo, Marcelo Angelo; Zimmermann, Juliano; Conradi Junior, Elio; Bertoldo, Danieli Cristina
- ItemEco-friendly, renewable Crambe abyssinica Hochst-based adsorbents remove high quantities of Zn2+ in water(2020) Schwantes, Daniel; Affonso Celso Gonçalves; Andreia da Paz Schiller; Jéssica Manfrin; Luiz Alberto Verderio Bianco; Andressa Giombelli Rosenberger
- ItemEcofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd2+, Pb2+, and Crtotal(2022) Schwantes, Daniel; Affonso Celso Gonçalves Junior; Henrique Alipio Perina; César Ricardo Teixeira Tarley; Douglas Cardoso Dragunski; Elio Conradi Junior; Juliano Zimmermann; Muhammad Raziq Rahimi Kooh
- ItemEffect of Chitosan–Riboflavin Bioconjugate on Green Mold Caused by Penicillium digitatum in Lemon Fruit(2024) Ipinza Concha, Brenda Michelle; Dibona Villanueva, Luciano Francesco; Fuentealba Patiño, Denis Alberto; Pinilla Quispe, Alexander; Schwantes, Daniel; Garzón Nivia, María Alejandra; Herrera Défaz, Mario Andrés; Valdés Gómez, HéctorPenicillium digitatum is the causal agent of green mold, a primary postharvest disease of citrus fruits. This study evaluated the efficacy of a novel photoactive chitosan–riboflavin bioconjugate (CH-RF) to control green mold in vitro and in lemon fruit. The results showed total inhibition of P. digitatum growth on APDA supplemented with CH-RF at 0.5% (w/v) and a significant reduction of 84.8% at 0.25% (w/v). Lemons treated with CH-RF and kept under controlled conditions (20 °C and 90–95% relative humidity) exhibited a noteworthy reduction in green mold incidence four days post-inoculation. Notably, these effects persisted, with all treatments remaining significantly distinct from the control group until day 14. Furthermore, CH-RF showed high control of green mold in lemons after 20 days of cold storage (5 ± 1 °C). The disease incidence five days after cold storage indicated significant differences from the values observed in the control. Most CH-RF treatments showed enhanced control of green mold when riboflavin was activated by white-light exposure. These findings suggest that this novel fungicide could be a viable alternative to conventional synthetic fungicides, allowing more sustainable management of lemon fruit diseases.
- ItemEffects of Successive Top-Dressing Application of Lime on a Sweet Cherry Orchard in Southern Chile(MDPI, 2024) Artacho Vargas, Pamela Natalia; Schwantes, Daniel; Martabit Jacob, Pablo; Bonomelli de Pinaga, Claudia MaríaAnnual top-dressing application of agricultural lime is a common practice in fruit orchards on acidic soils in southern Chile, which could result in surface over-liming and base imbalances. A trial was performed in a cherry orchard with an 8-year history of surface liming to evaluate the effectiveness of lime materials in neutralizing acidity in the soil profile and the effect on the tree nutritional status. No-lime (NL), calcitic (AgL), hydrated (HL), and liquid (LL) lime treatments were applied on soil surface at commercial rates, and soil acidity variables were measured at depths of 0-5, 5-10, and 10-20 cm in samples collected at 0, 15, 30, 60, and 225 days after application. Tree nutritional status was evaluated through foliar analysis. Top-dressing application of AgL was ineffective in ameliorating subsoil acidity at depths >5 cm, even in high-rainfall conditions. HL did not exhibit greater alkalinity mobility compared to AgL, although it had a faster but shorter-lived reaction. At the manufacturer-recommended rates, LL application was ineffective. After 8 years of top-dressing liming with AgL, a significant stratification of soil pH, Al, and Ca was observed. However, foliar concentration of bases did not reflect the surface Ca accumulation in soil, discarding an antagonistic cation competition for tree uptake.
- ItemEnvironmental fate of chlorpyrifos in Rhodic Ferralsol grown with corn during summer and winter seasons under high-intensity rainfall(2023) Affonso Celso Gonçalves, Jr.; Elio Conradi Junior; Schwantes, Daniel; Adilson Pinheiro; Vander Kaufmann; Aline Snak
- ItemEvaluation of benthic macroinvertebrates as indicators of metal pollution in Brazilian rivers(TAYLOR & FRANCIS LTD, 2021) Manfrin, Jessica; Schwantes, Daniel; Goncalves, Affonso Celso, Jr.; Schiller, Andreia da Paz; Zimmermann, Juliano; Dias de Oliveira, Vinicius HenriqueThe evaluation of water resources quality is an important tool for controlling and monitoring water bodies, among which, the evaluation of toxic metal levels in benthic macroinvertebrates has been highlighted. This study aimed to evaluate the biological quality of the Alvorada and Mandaguari rivers and to evaluate the metal bioaccumulation by means of the metal concentrations in surface waters, bottom sediments and benthic macroinvertebrates. Samples of water, biological material and sediments were conducted at six sampling points, 3 points in each river during 12 months. Macroinvertebrates were sorted, identified and analysed from the biological metrics, BMWP' index and statistical analyses. The samples of benthic macroinvertebrates and sediments were submitted to nitroperchloric digestion for further determination of the metal content. The metal concentrations in sediment had become high in both rivers, reaching values of up to 1752.50 mg kg(-1) of Pb in point M1 and 53.80 mg kg(-1) of Cd in point M3. Macroinvertebrate tissues exhibited high levels of toxic metals, reaching values of 146.11 mg kg(-1) of Cr in point M1, 144.28 mg kg(-1) of Pb and 3.11 mg kg(-1) of Cd in point M3, which indicates the occurrence of bioaccumulation and insertion in the food chain. The results from the evaluation using the BMWP' index do not present the real conditions of the watersheds, which suggests a review of the evaluation method. In addition, the environmental evaluation using macroinvertebrates is a good tool to verify the impacts in a river.
- ItemFate of atrazine in soybean (Glycine max L.) and corn (Zea mays L.) succession in Brazilian subtropical conditions(2024) Goncalves Jr, Affonso Celso; Conradi Jr, Elio; Schwantes, Daniel; Braccini, Alessandro; Pinheiro, Adilson; Conradi, GustavoThis work aimed to evaluate the distribution of atrazine via surface runoff, leaching, and retention in a Rhodic Ferralsol and to analyze the effect of a succession of corn and soybean crops in Brazilian subtropical edaphoclimatic conditions on the distribution of this herbicide. The mobility of atrazine was evaluated using a drainage lysimeter under conditions of intensely simulated precipitation, carried out 24 h and 48 h after a single herbicide application at 17 days after corn emergence. Surface runoff and leaching were sampled during the rainfall simulations at intervals of 5 min until completing 1 h. Corn foliar analyses were carried out to measure the residual amounts of atrazine. In addition, laboratory studies of sorption (equilibrium and thermodynamics) and dissipation were carried out to understand the dynamics of atrazine in the soil. Freundlich's non-linear isotherms presented an excellent fit in the description of atrazine sorption in a Rhodic Ferralsol. The high content of organic matter in the soil and the temperature variation directly influences the retention of atrazine in the soil. The halflife (t1/2) of atrazine in soil under controlled conditions indicates a non-persistent pesticide, with 14.44 days. However, the herbicide can persist in deep soil layers for more than 93 days after spraying. When high-intensity rainfall occurs 24 h after application, large proportions of atrazine are lost by runoff within the first 20 min of rain. At the same time, significantly inferior losses are observed when rainfall occurs 48 h after spraying. Highintensity rainfall within 24 h of atrazine application leads to substantial losses, causing an approximate 84% reduction in its concentration in corn leaves and a 94% reduction in soil. Conservationist agronomic practices that protect the soil, especially during the initial periods of corn cultivation, are essential to reduce atrazine losses by runoff or leaching. In addition, increasing the concentration of organic matter in the soil can be extremely promising in increasing the retention of this pesticide to soil colloids, preventing its loss in soils with a low content of clay minerals.
- ItemGrowth and accumulation of Pb by roots and shoots of Brassica juncea L.(2020) Bassegio, C.; Campagnolo, M.A.; Schwantes, Daniel; Goncalves, A.C.; Manfrin, J.; Schiller, A.D.; Bassegio, D.
- ItemImplications of wheat farming in Cd(II) and Pb(II) contaminated red eutrophic Oxisol: an experimental pilot investigation(2023) Affonso Celso Gonçalves, Jr; Schwantes, Daniel; Marcelo Angelo Campagnolo; Elio Conradi, Jr; Angélica de Fatima Bortolato Piccioli; Emanuel Sobocinski Zanini
- ItemPhytoremediation capacity, growth and physiological responses of Crambe abyssinica Hochst on soil contaminated with Cd and Pb(2020) Goncalves, A. C.; Schwantes, Daniel; de Sousa, R. F. B.; da Silva, T. R. B.; Guimaraes, V. F.; Campagnolo, M. A.; de Vasconcelos, E. S.; Zimmermann, J.
- ItemPotential of agricultural and agroindustrial wastes as adsorbent materials of toxic heavy metals: a review(2020) Schiller, Andreia da Paz; Goncalves, Affonso Celso, Jr.; Braccini, Alessandro de Lucca; Schwantes, Daniel; Campagnolo, Marcelo Angelo; Conradi, Elio, Jr.; Zimmermann, Juliano