Grace Anne Vieira Magalhães-Ghiotto , Jean Paulo Silva Natal , Marcos Rogério Guilherme , Raquel Guttierres Gomes , Rosângela Bergamasco
{"title":"评估基于化学改性明胶和含氧化石墨烯纳米颗粒的 PVA 复合水凝胶对蓝藻和蓝藻毒素的去除效果","authors":"Grace Anne Vieira Magalhães-Ghiotto , Jean Paulo Silva Natal , Marcos Rogério Guilherme , Raquel Guttierres Gomes , Rosângela Bergamasco","doi":"10.1016/j.enmm.2024.100995","DOIUrl":null,"url":null,"abstract":"<div><p>After being applied to pharmaceutics removal from water, the newly synthesized composite hydrogel based on chemically modified gelatin and PVA-containing graphene nanoparticles (CHGP-GOn), was now assessed for another application. The hydrogels were able to interact with <em>Microcystis aeruginosa</em> cells, resulting in the formation of small cell colonies and cell lysis related to exposure time. In the removal tests, the best general removal efficiency of cyanobacterial cells was achieved with the highest adsorbent mass at natural pH, achieving values of removal of 90 % for cells, 75 % chlorophyll-a, 63 % and 43 % for turbidity and visible colour removals, respectively. From the kinetic study, the results showed that cell inactivation has achieved removal equilibrium in 19 h, with a qe of 106 × 10<sup>6</sup> cells/g of CHGP-GOn. Furthermore, with the results from the other parameters, the tests presented a removal equilibrium of just 14 h, there was a removal of 4670 µg/L of Chlorophyll-a and 6450 µg/L/g of MC-LR microcystin per gram of adsorbent. The experimental data best fitted to the Elovich model, indicating possible removal by chemisorption. Analysis of cellular integrity and morphology showed that within just 12 h, few cyanobacterial cells showed membrane disruption and release of intracellular toxins, with an increase in the toxicity medium related to extended exposure time, and presentation of morphological and superficial cellular damage within 24 h. In addition, other characteristic measurements presented an exceptional mechanical strength and resistance that was slightly reduced after swelling. However, showing good development during adsorption tests under agitation, without any detachment of material and an absence of GO leaching. Therefore, it can be concluded that the synthesized hydrogel should be applied in removing <em>M. aeruginosa</em> cells and their toxins from water treatment, serving as an excellent alternative to traditional adsorbents.</p></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 100995"},"PeriodicalIF":0.0000,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Evaluation of the removal of cyanobacteria and cyanotoxins with a composite hydrogel based on chemically modified gelatin and PVA-containing graphene oxide nanoparticles\",\"authors\":\"Grace Anne Vieira Magalhães-Ghiotto , Jean Paulo Silva Natal , Marcos Rogério Guilherme , Raquel Guttierres Gomes , Rosângela Bergamasco\",\"doi\":\"10.1016/j.enmm.2024.100995\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>After being applied to pharmaceutics removal from water, the newly synthesized composite hydrogel based on chemically modified gelatin and PVA-containing graphene nanoparticles (CHGP-GOn), was now assessed for another application. The hydrogels were able to interact with <em>Microcystis aeruginosa</em> cells, resulting in the formation of small cell colonies and cell lysis related to exposure time. In the removal tests, the best general removal efficiency of cyanobacterial cells was achieved with the highest adsorbent mass at natural pH, achieving values of removal of 90 % for cells, 75 % chlorophyll-a, 63 % and 43 % for turbidity and visible colour removals, respectively. From the kinetic study, the results showed that cell inactivation has achieved removal equilibrium in 19 h, with a qe of 106 × 10<sup>6</sup> cells/g of CHGP-GOn. Furthermore, with the results from the other parameters, the tests presented a removal equilibrium of just 14 h, there was a removal of 4670 µg/L of Chlorophyll-a and 6450 µg/L/g of MC-LR microcystin per gram of adsorbent. The experimental data best fitted to the Elovich model, indicating possible removal by chemisorption. Analysis of cellular integrity and morphology showed that within just 12 h, few cyanobacterial cells showed membrane disruption and release of intracellular toxins, with an increase in the toxicity medium related to extended exposure time, and presentation of morphological and superficial cellular damage within 24 h. In addition, other characteristic measurements presented an exceptional mechanical strength and resistance that was slightly reduced after swelling. However, showing good development during adsorption tests under agitation, without any detachment of material and an absence of GO leaching. Therefore, it can be concluded that the synthesized hydrogel should be applied in removing <em>M. aeruginosa</em> cells and their toxins from water treatment, serving as an excellent alternative to traditional adsorbents.</p></div>\",\"PeriodicalId\":11716,\"journal\":{\"name\":\"Environmental Nanotechnology, Monitoring and Management\",\"volume\":\"22 \",\"pages\":\"Article 100995\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-08-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Nanotechnology, Monitoring and Management\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2215153224000837\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Environmental Science\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Nanotechnology, Monitoring and Management","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2215153224000837","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Environmental Science","Score":null,"Total":0}
Evaluation of the removal of cyanobacteria and cyanotoxins with a composite hydrogel based on chemically modified gelatin and PVA-containing graphene oxide nanoparticles
After being applied to pharmaceutics removal from water, the newly synthesized composite hydrogel based on chemically modified gelatin and PVA-containing graphene nanoparticles (CHGP-GOn), was now assessed for another application. The hydrogels were able to interact with Microcystis aeruginosa cells, resulting in the formation of small cell colonies and cell lysis related to exposure time. In the removal tests, the best general removal efficiency of cyanobacterial cells was achieved with the highest adsorbent mass at natural pH, achieving values of removal of 90 % for cells, 75 % chlorophyll-a, 63 % and 43 % for turbidity and visible colour removals, respectively. From the kinetic study, the results showed that cell inactivation has achieved removal equilibrium in 19 h, with a qe of 106 × 106 cells/g of CHGP-GOn. Furthermore, with the results from the other parameters, the tests presented a removal equilibrium of just 14 h, there was a removal of 4670 µg/L of Chlorophyll-a and 6450 µg/L/g of MC-LR microcystin per gram of adsorbent. The experimental data best fitted to the Elovich model, indicating possible removal by chemisorption. Analysis of cellular integrity and morphology showed that within just 12 h, few cyanobacterial cells showed membrane disruption and release of intracellular toxins, with an increase in the toxicity medium related to extended exposure time, and presentation of morphological and superficial cellular damage within 24 h. In addition, other characteristic measurements presented an exceptional mechanical strength and resistance that was slightly reduced after swelling. However, showing good development during adsorption tests under agitation, without any detachment of material and an absence of GO leaching. Therefore, it can be concluded that the synthesized hydrogel should be applied in removing M. aeruginosa cells and their toxins from water treatment, serving as an excellent alternative to traditional adsorbents.
期刊介绍:
Environmental Nanotechnology, Monitoring and Management is a journal devoted to the publication of peer reviewed original research on environmental nanotechnologies, monitoring studies and management for water, soil , waste and human health samples. Critical review articles, short communications and scientific policy briefs are also welcome. The journal will include all environmental matrices except air. Nanomaterials were suggested as efficient cost-effective and environmental friendly alternative to existing treatment materials, from the standpoints of both resource conservation and environmental remediation. The journal aims to receive papers in the field of nanotechnology covering; Developments of new nanosorbents for: •Groundwater, drinking water and wastewater treatment •Remediation of contaminated sites •Assessment of novel nanotechnologies including sustainability and life cycle implications Monitoring and Management papers should cover the fields of: •Novel analytical methods applied to environmental and health samples •Fate and transport of pollutants in the environment •Case studies covering environmental monitoring and public health •Water and soil prevention and legislation •Industrial and hazardous waste- legislation, characterisation, management practices, minimization, treatment and disposal •Environmental management and remediation