Article
Environmental Sciences
R. Boujelben, M. Ellouze, F. Aziz, N. Ouazzani, S. Sayadi
Summary: The study demonstrated that powdered marble is an effective and economical adsorbent for removing trivalent chromium from tanning effluents, with great potential for chromium recovery. Furthermore, desorption experiments showed that approximately 45% of the adsorbed trivalent chromium can be recovered using hydrochloric acid.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Leticia de Moura Sousa, Felipe Santos Moreira, Vicelma Luiz Cardoso, Fabiana Regina Xavier Batista
Summary: The research evaluates the effectiveness of Rhodobacter capsulatus in removing hexavalent chromium and total chromium contamination. The study shows complete removal of hexavalent chromium, with faster removal times observed at higher light intensities. Maximum removal of total chromium occurs at 5,670 lx and low initial concentrations of hexavalent chromium. Increasing light intensity promotes cell growth and pigment production. The final pigment contents are 2.22 mg/m3 (bacteriochlorophyll) and 1.44 mg/m3 (carotenoid).
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Yago Neco Teixeira, Francisco Jose de Paula Filho, Vinicius Pereira Bacurau, Jorge Marcell Coelho Menezes, Anderson Zhong Fan, Ricardo Paulo Fonseca Melo
Summary: This study assesses the efficiency of ionic flocculation for the removal of MB from synthetic effluent. The results demonstrate that ionic flocculation is a fast and effective method for MB removal.
Article
Environmental Sciences
Dong Wang, Chuyun Gao, Chenchen Wang, Nannan Liu, Chunsheng Qiu, Jingjie Yu, Shaopo Wang
Summary: The study found that mixed petrochemical wastewater significantly affects the organic compound removal process, especially with the addition of polyester wastewater which can prolong the removal process. Moreover, the mixture of wastewater also resulted in the decrease of crucial degrading microbes, leading to inefficient removal of aromatic compounds.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Prabhat Kumar Patel, Lalit Mohan Pandey, Ramagopal V. S. Uppaluri
Summary: Monochloroacetic acid precursor-based carboxymethyl chitosan resins were prepared and investigated for their adsorption properties of Zn, Pb, and Fe. The complexity of the adsorbate system and the co-existing cations significantly influenced the sorption characteristics of the multi-heavy metal ions. The carboxymethyl chitosan resin exhibited optimal adsorption capacities of 238.10 mg g-1 for Zn, 4.78 mg g-1 for Pb, and 147.06 mg g-1 for Fe. The resin could be effectively regenerated using low-cost acid-base solutions even after three adsorption-desorption cycles.
ENVIRONMENTAL RESEARCH
(2024)
Article
Biochemistry & Molecular Biology
Laura Cervera-Gabalda, Cristina Gomez-Polo
Summary: In this study, magnetic carbon nanocomposites were successfully used for the removal of Cr (VI). The results showed that the magnetic adsorbents synthesized at high annealing temperature exhibited high magnetization for magnetic separation and large specific surface area for enhanced pollutant adsorption. The adsorption tests confirmed the ability of the synthesized nanostructures to remove Cr (VI), and the materials showed reusability after consecutive adsorption cycles.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Soodamany Periyasamy, Natrayasamy Viswanathan
Summary: Hydrocalumite (HC) is developed as a promising adsorbent for chromium removal, but its powder form limits its practical application. In this study, HC was dispersed in biopolymeric matrices (chitosan and cellulose) to form hybrid bio-composites (HCCS and HCCel) for Cr(VI) removal. Magnetic bio-composites (Fe3O4@HCCS and Fe3O4@HCCel) were prepared for easy separation after adsorption. The synthesized bio-composites showed high adsorption capacity and can be regenerated up to four times with NaOH solution. They are efficient adsorbents for chromium removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Jiao Du, Xiaoxian Shang, Jingpei Shi, Yueping Guan
Summary: This paper studied a simple and effective method for chromium removal in wastewater using magnetic nanoparticles in a gradient magnetic field. The optimal process conditions were determined, and a PSO-BP model was established to predict chromium adsorption efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Chemical
Meibo He, Tze Chiang Albert Ng, Shujuan Huang, Boyan Xu, How Yong Ng
Summary: This study proposes the use of poly (acrylic acid) hydrogel as a post-treatment method for AnMBRs to remove and recover NH4+-N, thus promoting the circular economy and the adoption of AnMBR technology. The results show that PAA hydrogels have excellent adsorption capacities for NH4+-N and can be regenerated multiple times with minimal decline in adsorption capacity. The use of a strategic recirculation of HCl solution as an eluent also shows promise in concentrating NH4+-N as resources. Economically, the PAA hydrogel-based adsorption/desorption process coupled with eluent recirculation is cost-effective for removing and recovering NH4+-N from AnMBR effluent. Overall, this study has the potential to expand the application of AnMBRs and contribute to innovations in sustainable wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Sung-Wook Kim, Ilgook Kim, Min Ku Jeon, Chan Woo Park, In-Ho Yoon
Summary: The study successfully removed Cs from illite using a chloride salt treatment technique, achieving efficient Cs removal by processing at high temperatures and forming CsCl stable salt phase, even a certain level of removal could be achieved at lower temperatures.
Article
Engineering, Environmental
Myong Nam Pak, Jiaojiao Yang, Qimeng Li, Guoxiang Wang, Fei He
Summary: A novel magnetic anion exchange microbead (NAEM) with excellent reuse and anti-fouling performance was developed for the removal of reactive dye sunset yellow (FCF). NAEM exhibited a significantly higher initial adsorption rate and equilibrium adsorption capacity for FCF compared to commercial anion-exchange resins. The multilayered adsorption of FCF on different resins suggests the contribution of physical adsorption. NAEM also demonstrated enhanced anti-interference capacity and prolonged reusability compared to other resins.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Dahee Kim, Da-Seul Lim, Hye-Jin Lee, In-Chul Kim, Young -Nam Kwon, Suwan Myung
Summary: In this study, a mixed-matrix membrane (MMM) composed of a polymer matrix and adsorbent was developed for efficient removal of heavy-metal ions from wastewater. The MMM showed high adsorption capacity, excellent desorption efficiency, and good reusability, making it a promising solution for wastewater treatment.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Environmental Sciences
Yingcai Tang, Zhiqiang Chen, Qinxue Wen, Boxuan Yang, Yang Pan
Summary: This study compared the removal efficiency of EfOM by MIEX, ozonation, and M+O processes, with ozonation showing better performance in reducing OMPs, TF, genotoxicity, and estrogenic activity. The M+O process was found to be more effective in removing EfOM compared to individual MIEX or ozonation processes. MIEX adsorption of organic nitrogen and nitrite-nitrogen helped reduce the generation of ammonia-nitrogen and nitrate-nitrogen in the subsequent ozonation process. Different regenerants also influenced the OMP desorption performance of MIEX, with NaCl + NaOH showing the highest total OMP desorption efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Jing Yang, Ruixue Wang, Ziyi Cheng, Yucheng Chen, Lei Li, Xingrun Wang
Summary: A new ferrite process has been developed in this study for removal and recycling of Cr(VI) from alkaline wastewater, forming almost pure chromium ferrite under proposed optimum conditions. The chromium ferrite product with good magnetic properties has the potential to be recycled as a useful material.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Ebrahim Saied, Ahmed M. Eid, Saad El-Din Hassan, Salem S. Salem, Ahmed A. Radwan, Mahmoud Halawa, Fayez M. Saleh, Hosam A. Saad, Essa M. Saied, Amr Fouda
Summary: Magnesium oxide nanoparticles (MgO-NPs) were successfully synthesized using Aspergillus terreus S1, showing excellent properties in antimicrobial activity, biotreatment of tanning effluent, and chromium ion removal. Characterization and biological activity tests confirmed the high efficiency and potential of the biosynthesized MgO-NPs.
Article
Materials Science, Ceramics
Lidiane Pereira Bessa, Eduardo de Paulo Ferreira, Vicelma Luiz Cardoso, Miria Hespanhol Miranda Reis
Summary: In this study, Si was added as a sintering additive into SiC to produce Si-bonded SiC hollow fiber membranes for oil/water separation. The addition of Si improved the mechanical resistance and filtration efficiency of the membranes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Thermodynamics
F. S. Moreira, M. S. Rodrigues, L. M. Sousa, F. R. X. Batista, J. S. Ferreira, V. L. Cardoso
Summary: This study investigated the production of hydrogen using photofermentation with a co-culture of Enterobacter cloacae and either Rhodobacter capsulatus or Rhodopseudomonas palustris, along with the addition of glucose or lactose from milk whey permeate. The co-culture system achieved high hydrogen productivity and organic acid concentration.
Article
Energy & Fuels
Gustavo Machado Tottoli Ferreira, Felipe Santos Moreira, Vicelma Luiz Cardoso, Fabiana Regina Xavier Batista
Summary: In recent years, there has been significant interest in photo-fermentation-based biological hydrogen production. This paper assesses the viability of using purple non-sulfur bacteria in photo-fermentation for hydrogen production. The study shows that using a co-culture system and periodic medium renewal can greatly improve hydrogen yield and productivity.
BIOENERGY RESEARCH
(2023)
Article
Electrochemistry
Maria Zizi Martins Mendonca, Fabiano Mendonca de Oliveira, Jacqueline Marques Petroni, Bruno Gabriel Lucca, Rodrigo Amorim Bezerra da Silva, Vicelma Luiz Cardoso, Edmar Isaias de Melo
Summary: Biochar from coffee husks was used to prepare a carbon paste modified electrode (BC-CPE), which showed good performance in the simultaneous determination of Cd2+ and Pb2+ using differential pulse adsorptive stripping voltammetry (DPAdsV). The optimized BC-CPE exhibited a wide linear range, low LODs, and good stability and reproducibility. This method was successfully applied for the determination of Pb2+ and Cd2+ in water samples with good accuracy.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Physical
Camila Magalhaes de Sousa, Vicelma Luiz Cardoso, Fabiana Regina Xavier Batista
Summary: The increasing development of industries has led to excessive exploitation of natural resources and unregulated discharge of wastewater into the environment. Heavy metals, such as chromium, are highly toxic and persistent in nature. This study investigates the synergistic photocatalytic process for the reduction and removal of Cr (VI), using niobium oxide (Nb2O5) and microalgae Chlamydomonas reinhardtii in separate phases. The results show that the proposed model provides an average total removal of 71%, 31%, and 18% for initial concentrations of 10, 30, and 50 mg/L of Cr (VI), respectively.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Microbiology
Jessica Gatti Silva, Mayara Teixeira da Silva, Roseli Mendonca Dias, Vicelma Luiz Cardoso, Miriam Maria de Resende
Summary: Crushed and ground PCB samples were characterized using XRF and SEM to evaluate copper, lead, and aluminum. XRF analysis showed 0.12% lead, 3.72% copper, and 12.73% aluminum in the PCBs. Metal solubilization experiments using Acidithiobacillus ferrooxidans showed higher total metal solubilization with adjusted inoculum pH. However, bioleaching did not result in higher metal solubilization. Sequential bioremoval experiments with mixed culture after bioleaching removed varying percentages of metals, with higher removal achieved with magnetic field application.
CURRENT MICROBIOLOGY
(2023)
Article
Environmental Sciences
Karolyna Barros Miguel, Vicelma Luiz Cardoso, Miria Hespanhol Miranda Reis
Summary: We extracted and purified pigments and bioactive compounds from annatto seeds through sequential aqueous extraction and ultrafiltration processes, which exhibited significant antioxidant activity. Ultrafiltration process is a suitable alternative for concentrating bioactive compounds from the aqueous extract, although flux decay was observed due to cake formation on the membrane surface.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Environmental Sciences
Higor Tulio Correa, William Fernando Vieira, Adalberto Pessoa Jr, Vicelma Luiz Cardoso, Ubirajara Coutinho Filho
Summary: Insects, especially Tenebrio molitor, are being explored as a potential source for the production of enzymes and biosurfactants due to their low cost and ease of production. This study investigated the production of l-asparaginase and biosurfactants using T. molitor biomass as the primary source, and the results showed promising outcomes.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Engineering, Environmental
Leticia de Moura Sousa, Felipe Santos Moreira, Vicelma Luiz Cardoso, Fabiana Regina Xavier Batista
Summary: The research evaluates the effectiveness of Rhodobacter capsulatus in removing hexavalent chromium and total chromium contamination. The study shows complete removal of hexavalent chromium, with faster removal times observed at higher light intensities. Maximum removal of total chromium occurs at 5,670 lx and low initial concentrations of hexavalent chromium. Increasing light intensity promotes cell growth and pigment production. The final pigment contents are 2.22 mg/m3 (bacteriochlorophyll) and 1.44 mg/m3 (carotenoid).
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Polymer Science
M. S. Rodrigues, F. S. Moreira, J. G. Silva, V. L. Cardoso, M. M. de Resende
Summary: This study produced and characterized heterogeneous ion-exchange membranes using the phase inversion technique. The membranes achieved high water permeability fluxes and increased ion exchange indices with the incorporation of resins and graphene oxide (GO). The addition of GO demonstrated promising results in producing membranes for the removal of metal ions from contaminated effluents.
Article
Water Resources
Amanda Carmelo da Rocha, Patricia Angelica Vieira, Vicelma Luiz Cardoso
Summary: This paper investigated the pretreatment of raw cheese whey to enhance its biodegradability in an anaerobic reactor. Coagulation/flocculation using Carica papaya seeds and Fenton/photo-Fenton processes were applied. The physicochemical parameters were characterized to assess the pollution potential of the cheese whey. The coagulation/flocculation process showed effective turbidity removal, and the Fenton/photo-Fenton processes improved the biodegradability of the cheese whey.
ENGENHARIA SANITARIA E AMBIENTAL
(2023)
Article
Environmental Sciences
Igor G. F. Costa, Stella R. F. L. Ribeiro, Lucas L. Nascimento, Antonio Otavio T. Patrocinio, Vicelma L. Cardoso, Fabiana R. X. Batista, Miria H. M. Reis
Summary: Heterogenous photocatalysis with silver-decorated titanium dioxide (TiO2) catalysts supported on alumina hollow fibers showed potential for efficient Cr(VI) photoreduction in wastewater treatment. The addition of ultrasound during the synthesis process improved the distribution of Ag nanoparticles on the TiO2 surface. Higher loading of Ag nanoparticles (30 wt%) led to significant enhancement in Cr(VI) photoreduction activity of the TiO2 catalyst. Both suspended and internally or externally supported catalysts achieved complete Cr(VI) photoreduction after prolonged reaction times. However, the externally supported catalyst exhibited superior activity, especially in the initial reuse cycles.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)