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San juan-Garisado Y, Luna-Guevara F, Herrera PA, Soto-Paz J, Alvarez-Trujillo JD, Mejia-Parada C, Parra-Orobio BA. Optimization of the Photo-Fenton process for the effective removal of chemical oxygen demand and phenols in portable toilet wastewater: A treatment study under real world conditions. Heliyon 2024; 10:e35286. [PMID: 39166086 PMCID: PMC11334677 DOI: 10.1016/j.heliyon.2024.e35286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 07/23/2024] [Accepted: 07/25/2024] [Indexed: 08/22/2024] Open
Abstract
Wastewater from portable toilets (WWPT) is characterized by a high content of organic matter and a variety of chemical compounds that retain bad odors, especially phenols, a type of pollutant that is difficult to degrade by conventional treatments; in addition, it is persistent, toxic, and accumulates in the aquatic environment. Although different successful experiences with the use of Photo-Fenton are reported in the scientific domain, its application in WWPT is scarce and warrants study due to the wide use of portable toilets. The objective of this study was to evaluate the Photo-Fenton oxidation process in the removal of organic matter expressed as COD in a WWPT, as well as the reduction of phenols and BOD5. The experimental runs were carried out in a 0.50 L batch reactor to evaluate the effect of the factors (H2O2: 0.019, 25.56, 40.67, 87.24, 148.91, 174.45 g L-1 and pH: 2.80, 3.00, 3.27, 4.40, 5.53, 6.00 UNT) on COD removal and sludge production. It was found that the optimum operating conditions of pH 4.72 and H2O2 dosage of 174.45 g L-1 reduced the concentration of phenols by 97.83 % and 95.49 % of COD. In addition, 98.01 % of BOD5 was reduced, resulting in a biodegradability ratio (BOD5/COD) of 0.23 compared to the untreated wastewater of 0.53. From a cost perspective, the use of Photo-Fenton to treat wastewater under these conditions would be US$ 1.15 per liter.
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Affiliation(s)
- Yorgi San juan-Garisado
- Universidad Popular Del Cesar Seccional Aguachica (UPCsA), Facultad de Ingenierías y Tecnologías, Grupo de Investigación GE&TES, Carrera 40 #1 Norte-2 a 1 Norte-58, Aguachica, Colombia
| | - Francisco Luna-Guevara
- Universidad de Santander, Facultad de Ingenierías, Grupo Ambiental de Investigación – GAIA, Calle 70 # 55-210, Bucaramanga, Colombia
| | - Pablo Alberto Herrera
- Universidad Popular Del Cesar Seccional Aguachica (UPCsA), Facultad de Ingenierías y Tecnologías, Grupo de Investigación GE&TES, Carrera 40 #1 Norte-2 a 1 Norte-58, Aguachica, Colombia
| | - Jonathan Soto-Paz
- Universidad de Investigación y Desarrollo, Faculty of Engineering, Research Group Threats, Vulnerability and Risks to Natural Phenomena, Calle 9 # 23-55, Bucaramanga, Colombia
| | - Jesus David Alvarez-Trujillo
- Universidad de Investigación y Desarrollo, Faculty of Engineering, Research Group Threats, Vulnerability and Risks to Natural Phenomena, Calle 9 # 23-55, Bucaramanga, Colombia
- Universidad Industrial de Santander, Facultad de Ingenierías Fisicomecánicas, Grupo de Investigación en Recursos Hídricos y Saneamiento Ambiental – GPH, Carrera 27 Calle 9 Ciudad Universitaria, Bucaramanga, Colombia
| | - Cristian Mejia-Parada
- Universidad de Investigación y Desarrollo, Faculty of Engineering, Research Group Threats, Vulnerability and Risks to Natural Phenomena, Calle 9 # 23-55, Bucaramanga, Colombia
| | - Brayan Alexis Parra-Orobio
- Universidad Popular Del Cesar Seccional Aguachica (UPCsA), Facultad de Ingenierías y Tecnologías, Grupo de Investigación GE&TES, Carrera 40 #1 Norte-2 a 1 Norte-58, Aguachica, Colombia
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Lu W, Wang A, Zhang Y, Ren S, Zhang Z. Insights into the efficient mineralization of antibiotic trimethoprim in aqueous media by Fe 2+ catalytically enhanced vacuum-UV irradiation: Kinetics, mechanisms, and toxicity evaluation. ENVIRONMENTAL RESEARCH 2024; 250:118363. [PMID: 38331141 DOI: 10.1016/j.envres.2024.118363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/29/2023] [Accepted: 12/05/2023] [Indexed: 02/10/2024]
Abstract
The widespread existence of antibiotics in the environment has attracted growing concerns regarding the potential adverse effects on aquatic organisms, ecosystems, and human health even at low concentrations. Extensive efforts have been devoted to developing new methods for effective elimination of antibiotics from wastewater. Herein, a novel process of Fe2+ catalytically enhanced vacuum ultraviolet (VUV) irradiation was proposed as a promising approach for the removal of antibiotic trimethoprim (TMP) in water. Compared with UVC photolysis, VUV photolysis, and UVC/Fe2+, VUV/Fe2+ could increase the pseudo-first-order reaction rate constant of TMP removal by 6.6-38.4 times and the mineralization rate by 36.5%-59.9%. The excellent performance might originate from the synergistic effect of VUV and Fe2+, i.e., VUV irradiation could effectively split water and largely accelerate the Fe3+/Fe2+ cycle to generate more reactive oxygen species (ROS). EPR results indicated that •OH and O2•- were identified as the main ROS in the UVC/Fe2+ and VUV/Fe2+ processes, while •OH, O2•-, and 1O2 were involved in the VUV process. The operating parameters, such as Fe2+ dosage and initial TMP contents, were evaluated and optimized. Up to 8 aromatic intermediates derived from hydroxylation, demethylation, carbonylation, and methylene group cleavage were identified by UPLC-QTOF-MS/MS technique, the possible pathways of TMP degradation were proposed. Finally, the acute and chronic toxicity of intermediates formed during TMP degradation in the VUV/Fe2+ process were also evaluated.
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Affiliation(s)
- Wen Lu
- School of Environment, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing Jiaotong University, China.
| | - Aimin Wang
- School of Environment, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing Jiaotong University, China.
| | - Yanyu Zhang
- School of Environment, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing Jiaotong University, China.
| | - Songyu Ren
- School of Environment, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing Jiaotong University, China.
| | - Zhongguo Zhang
- Institute of Resources and Environment, Beijing Academy of Science and Technology, China.
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Louhichi G, El Khouni A, Ghrabi A, Khouni I. Phytotoxicity assessment of treated vegetable oily wastewater via environmentally coagulation/flocculation and membrane filtration technologies using lettuce (Lactuca sativa) seeds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-023-31594-2. [PMID: 38175507 DOI: 10.1007/s11356-023-31594-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 12/12/2023] [Indexed: 01/05/2024]
Abstract
The present investigation highlights the necessity of monitoring some basic physico-chemical water quality indicators and their phytotoxic effect using ecotoxicological bioassays such as "seed germination tests." The phytotoxicity of raw and treated vegetable oil refinery wastewater (VORW) using different treatment processes was assessed through some physiological responses (relative seed germination (RSG), seedling elongation, and germination index (GI)) using Lactuca sativa cultivar. Biotest results of different raw water samples revealed a noticeable correlation between the organic matter content and water phytotoxicity. In fact, VORW showed a very low RSG (17 ± 0.7 to -47 ± 0.58%) and high phytotoxic effects (GI < 50%). The use of coagulation/flocculation (CF) allowed a satisfactory phytotoxicity removal where RSG obtained ranged from 83 ± 1.58 to 90 ± 1.2%. However, the effluent still presents high to moderate phytotoxicity since GI remained below 80% which indicates the presence of toxic elements remaining after CF treatment. When VORW were treated using membrane processes, their phytotoxicity was gradually decreased with the decrease in the membrane pore size. The use of microfiltration membranes (MF), with pore size of 5 µm, 1.2 µm, 0.45 µm, and 0.22 µm, showed RSG values ranged from 37 ± 1.15 to 77 ± 1.68% and GI of less than 80% indicating a moderate to high phytotoxicity. However, the use of ultrafiltration (UF) membranes with molecular weight cut-off (MWCO) of 100 kDa, 30 kDa, and 10 kDa made it possible to achieve an RSG of 100% and an IG exceeding 80% showing that the VORW-treated using UF does not exhibit any phytotoxicity effect. Hence, UF appears to be the most efficient and environmentally friendly technology that could be used for safely treated VORW irrigation purposes compared to CF and MF processes.
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Affiliation(s)
- Ghofrane Louhichi
- Laboratoire Eaux Usées Et Environnement, Centre de Recherches Et Des Technologies Des Eaux (CERTE), BP 273-8020, Soliman, Tunisia
| | - Amine El Khouni
- Laboratoire de Production Oléicole Intégrée, Institut de L'Olivier, Cité Mahrajène, BP 208, 1082, Tunis, Tunisia
| | - Ahmed Ghrabi
- Laboratoire Eaux Usées Et Environnement, Centre de Recherches Et Des Technologies Des Eaux (CERTE), BP 273-8020, Soliman, Tunisia
| | - Imen Khouni
- Laboratoire Eaux Usées Et Environnement, Centre de Recherches Et Des Technologies Des Eaux (CERTE), BP 273-8020, Soliman, Tunisia.
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Peng Y, Wang Z, Ren D, Zhang X, Zhang S, Chen W. Ion exchange synthesis of copper-based hydroxyapatite for the catalytic degradation of phenol. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 88:2332-2343. [PMID: 37966186 PMCID: wst_2023_292 DOI: 10.2166/wst.2023.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Hydroxyapatite (HAP) is a material renowned for its exceptional capabilities in adsorbing and exchanging heavy metal ions, making it a widely employed substance within the environmental domain. This study aims to present a novel material, namely copper-HAP (Cu-HAP), which was synthesized via an ion exchange method. The resulting material underwent comprehensive characterization using scanning electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and Brunauer-Emmett-Teller (BET) analysis. Subsequently, based on the principle of the Fenton-like oxidation reaction, the material was used for the degradation of phenol. The outcomes of the investigation revealed that the optimal preparation conditions for the catalyst were achieved at a temperature of 40 °C, a pH value of 5, and a relative dosage of Cu-HAP at 100 mg/g. Under the reaction conditions of a catalyst dosage of 2 g/L, a 30% hydrogen peroxide concentration of 30 mM, a phenol concentration of 20 mg/L, a pH value of 6, a temperature of 40 °C, and the degradation rate of phenol impressively reached 98.12%. Furthermore, the degradation rate remained at 42.31% even after five consecutive cycles, indicating the promising potential of Cu-HAP in the treatment of recalcitrant organic compounds within this field.
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Affiliation(s)
- Yu Peng
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China E-mail:
| | - Zhaobo Wang
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China
| | - Dajun Ren
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China
| | - Xiaoqing Zhang
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China
| | - Shuqin Zhang
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China
| | - Wangsheng Chen
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China
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Kumar V, Verma P. A critical review on environmental risk and toxic hazards of refractory pollutants discharged in chlorolignin waste of pulp and paper mills and their remediation approaches for environmental safety. ENVIRONMENTAL RESEARCH 2023; 236:116728. [PMID: 37495063 DOI: 10.1016/j.envres.2023.116728] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/01/2023] [Accepted: 07/22/2023] [Indexed: 07/28/2023]
Abstract
Agro-based pulp and paper mills (PPMs) inevitably produce numerous refractory pollutants in their wastewater, including chlorolignin, chlorophenols, chlorocatechols, chloroguaiacol, cyanide, furan, dioxins, and other organic compounds, as well as various heavy metals, such as nickel (Ni), zinc (Zn), chromium (Cr), iron (Fe), lead (Pb), arsenic (As), etc. These pollutants pose significant threats to aquatic and terrestrial life due to their cytogenotoxicity, mutagenicity, impact on sexual organs, hormonal interference, endocrine disruption, and allergenic response. Consequently, it is crucial to reclaim pulp paper mill wastewater (PPMW) with high loads of refractory pollutants through effective and environmentally sustainable practices to minimize the presence of these chemicals and ensure environmental safety. However, there is currently no comprehensive published review providing up-to-date knowledge on the fate of refractory pollutants from PPMW in soil and aquatic environments, along with valuable insights into the associated health hazards and remediation methods. This critical review aims to shed light on the potential adverse effects of refractory pollutants from PPMW on natural ecosystems and living organisms. It explores existing effective treatment technologies for remediating these pollutants from wastewater, highlighting the advantages and disadvantages of each approach, all in pursuit of environmental safety. Special emphasis is placed on emerging technologies used to decontaminate wastewater discharged from PPMs, ensuring the preservation of the environment. Additionally, this review addresses the major challenges and proposes future research directions for the proper disposal of PPMW. It serves as a comprehensive source of knowledge on the environmental toxicity and risks associated with refractory pollutants in PPMW, making it a valuable reference for policymakers and researchers when selecting appropriate technologies for remediation. The scientific community, concerned with mitigating the widespread risks posed by refractory pollutants from PPMs, is expected to take a keen interest in this review.
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Affiliation(s)
- Vineet Kumar
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, Ajmer, 305817, Rajasthan, India
| | - Pradeep Verma
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, Ajmer, 305817, Rajasthan, India.
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6
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Grisales-Cifuentes CM, Serna-Galvis EA, Acelas N, Porras J, Flórez E, Torres-Palma RA. Biochar from palm fiber wastes as an activator of different oxidants for the elimination of pharmaceuticals from diverse classes in aqueous samples. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116148. [PMID: 36088761 DOI: 10.1016/j.jenvman.2022.116148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 08/12/2022] [Accepted: 08/28/2022] [Indexed: 06/15/2023]
Abstract
Biochar (BP) obtained from palm fiber wastes was combined with H2O2, peroxymonosulfate (PMS), or persulfate (PDS) to treat valsartan, acetaminophen, and cephalexin in water. BP activated PMS and PDS but no H2O2. Computational calculations indicated that interactions of PMS and PDS with BP are more favored than those with HP. The highest synergistic effect was obtained for the removal of valsartan by BP + PMS. This carbocatalytic process was optimized, evaluating the effects of pH, BP dose, and peroxymonosulfate concentration, and minimizing the oxidant quantity to decrease costs and environmental impacts of the process. SO4•-, HO•, 1O2, and O2•- were the agents involved in the degradation of the pharmaceuticals. The reusability of BP was tested, showing that the carbocatalytic process removed ∼80% of target pollutants after 120 min of treatment even at the fourth reuse cycle. Also, the process decreased the phytotoxicity of the treated sample. Simulated hospital wastewater was treated and its components induced competing effects, but the system achieved the target pharmaceuticals removal in this matrix. Additionally, the analysis of environmental impact using a life cycle assessment unraveled that the carbocatalytic process had a carbon footprint of 2.87 Kg CO2-Eq, with the biochar preparation (which involves the use of ZnCl2 and electric energy consumption) as the main hotspot in the process.
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Affiliation(s)
- Claudia M Grisales-Cifuentes
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Efraím A Serna-Galvis
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia; Grupo de Catalizadores y Adsorbentes (CATALAD), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 # 52-21, Medellín, Colombia.
| | - Nancy Acelas
- Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
| | - Jazmín Porras
- Grupo de Investigaciones Biomédicas Uniremington, Facultad de Ciencias de La Salud, Corporación Universitaria Remington (Uniremington), Calle 51 No. 51-27, Medellín, Colombia
| | - Elizabeth Flórez
- Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
| | - Ricardo A Torres-Palma
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia.
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Calabró MR, Roqueiro G, Tapia R, Crespo DC, Bargiela MF, Young BJ. Chronic toxicity, bioavailability and bioaccumulation of Zn, Cu and Pb in Lactuca sativa exposed to waste from an abandoned gold mine. CHEMOSPHERE 2022; 307:135855. [PMID: 35961448 DOI: 10.1016/j.chemosphere.2022.135855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/20/2022] [Accepted: 07/23/2022] [Indexed: 06/15/2023]
Abstract
Abandoned mines with untreated waste cause environmental pollution. The complex mixture of mining waste includes high metal content, anthropogenic chemicals and sterile rocks. Adverse effects of contaminated soils have been widely assessed by the use of plants. The aim of this study was to assess the chronic toxicity of a contaminated soil by waste from an abandoned gold mine on Lactuca sativa and its relationship with the bioavailability and bioaccumulation of Zn, Cu and Pb. Soil samples were taken from the site of mining waste stacking and a reference site in La Planta (Argentina). Contamination indices were calculated and acute and chronic exposures on L. sativa were carried out. Phytotoxicity indices, morphological and biochemical parameters, and concentrations of Zn, Cu and Pb in pseudo total and bioavailable soil fractions and in plant tissue were determined. Concentration- and time-dependent toxicity effects were observed, especially on plant width, fresh aerial biomass, leaf area and percentage of plants with completely necrotic aerial biomass. High levels of Zn (1453.3 ± 220.3 μg g-1) were found in plant tissue compared to Pb (277.2 ± 18.0 μg g-1) and Cu (255.3 ± 25.6 μg g-1). Toxicological endpoints correlated with metal uptake and mining waste concentration. In addition, bioaccumulation factors correlated with mobilisable and water soluble fractions. The concentration of Pb in aerial biomass surpassed the permissible concentrations in leaf vegetables, even at the reference site, indicating that lettuce crop consumption could be risky for the local population's health. This study demonstrated a strong relationship between metal bioavailability, toxicity endpoints and bioaccumulation, contributing with novel information to future ecotoxicological risk assessments and remediation plans.
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Affiliation(s)
- María Rosario Calabró
- Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMYZA). Nicolás Repetto y de los Reseros s/n (1686), Hurlingham, Argentina; Universidad de Buenos Aires, Facultad de Agronomía, Cátedra de Química Inorgánica y Analítica. Av. San Martín 4453 (1417), Buenos Aires, Argentina
| | - Gonzalo Roqueiro
- Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Juan, Calle 11 y Vidart, Pocito (5427), San Juan, Argentina; Universidad Nacional de San Juan, Facultad de Ciencias Exactas, Físicas y Naturales. Av. Libertador General San Martín 1109 (5400), San Juan, Argentina
| | - Raúl Tapia
- Universidad Nacional de San Juan, Facultad de Ciencias Exactas, Físicas y Naturales. Av. Libertador General San Martín 1109 (5400), San Juan, Argentina; Instituto Nacional de Tecnología Agropecuaria (INTA) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET-CCT San Juan), Calle 11 y Vidart, Pocito (5427), San Juan, Argentina
| | - Diana Cristina Crespo
- Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMYZA). Nicolás Repetto y de los Reseros s/n (1686), Hurlingham, Argentina
| | - Martha Fidela Bargiela
- Universidad de Buenos Aires, Facultad de Agronomía, Cátedra de Química Inorgánica y Analítica. Av. San Martín 4453 (1417), Buenos Aires, Argentina
| | - Brian Jonathan Young
- Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMYZA). Nicolás Repetto y de los Reseros s/n (1686), Hurlingham, Argentina; Universidad de Buenos Aires, Facultad de Agronomía, Cátedra de Química Inorgánica y Analítica. Av. San Martín 4453 (1417), Buenos Aires, Argentina.
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8
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Wang L, Fei Y, Gong C, Shan Y, Zhang Z, Zhang F, Cheng H. Comparative study of UV/H 2O 2 and UV/PMS processes for treating pulp and paper wastewater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:2032-2044. [PMID: 36315094 DOI: 10.2166/wst.2022.326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Pulp and paper wastewater (PPWW) contains numerous refractory and harmful contaminants that require advanced treatment to meet the discharge criteria. This study compared the efficacy of two PPWW treatments: ultraviolet/peroxymonosulfate (UV/PMS) and ultraviolet/H2O2 (UV/H2O2) working under similar circumstances. The initial pH value, oxidant dosage, UV radiation intensity, and pseudo-first-order constant kobs were systematically studied in both systems. Optimally, the UV/PMS process produced an effluent of higher quality than the UV/H2O2, as measured by the removal efficiencies of chemical oxygen demand (COD) in 60 min, which were 48.2 and 64.3% for the respective UV/H2O2 and UV/PMS processes and corresponding kobs values of 0.0102 and 0.0159 min-1, respectively. Radical scavenging experiments demonstrated that •OH was the primary reactive oxygen species in UV/H2O2 process, and •OH and SO4-• in the UV/PMS process. Moreover, ultraviolet-visible spectroscopy and gas chromatography coupled mass spectroscopy analyses showed that deep treatment of petroleum hydrocarbons with carbon chain lengths greater than 18 and macromolecular semi-volatile organic compounds in paper wastewater is difficult, whereas the UV/PMS process can significantly improve the removal of amides, esters, phenols, and other aromatic compounds.
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Affiliation(s)
- Liangliang Wang
- Institute of Resources and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing 100095, China E-mail:
| | - Yuchao Fei
- Institute of Resources and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing 100095, China E-mail:
| | - Chenhao Gong
- Institute of Resources and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing 100095, China E-mail:
| | - Yue Shan
- Institute of Resources and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing 100095, China E-mail:
| | - Zhongguo Zhang
- Institute of Resources and Environment, Beijing Academy of Science and Technology, No.1 Gao Li Zhang Road, Beijing 100095, China E-mail:
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9
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Ramos MDN, Rangel AS, Azevedo KS, Melo MGB, Oliveira MC, Watanabe CMU, Pereira FF, Silva CM, Aguiar A. Characteristics and treatment of Brazilian pulp and paper mill effluents: a review. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:651. [PMID: 35931934 PMCID: PMC9362618 DOI: 10.1007/s10661-022-10331-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 07/25/2022] [Indexed: 05/08/2023]
Abstract
Pulp and paper industries are very important for developing the Brazilian economy. During production processes, many effluents are generated with high polluting potential. The objective of this study is to conduct an extensive literature review on the characteristics of effluents and treatment forms adopted by Brazilian mills in this industrial sector. Most consulted studies address raw (without treatment) and secondary (after biological treatment) effluents, considering their main characteristics like pH, chemical and biochemical oxygen demands (COD and BOD, respectively), color, solids, organochlorines, toxicity, estrogenic activity, and phenols. Raw effluents differ considerably in composition, depending on the type of paper produced, the pulping process employed, and other steps, like pulp bleaching. Raw effluent characteristics indicate that this effluent cannot be directly disposed of into water bodies, because it does not comply with federal and state disposal standards. Secondary effluents normally comply with Brazilian legislations, although some studies have reported COD and total phenol concentrations higher than disposal standards, suggesting that additional treatments are necessary. Treated effluent reuse was verified in some Brazilian mills, while its disposal in eucalyptus plantations has been considered a promising alternative for irrigation purposes.
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Affiliation(s)
| | - Angélica Santos Rangel
- Natural Resource Institute, Federal University of Itajubá, Itajubá, Minas Gerais, 37500-903, Brazil
| | - Karina Siqueira Azevedo
- Natural Resource Institute, Federal University of Itajubá, Itajubá, Minas Gerais, 37500-903, Brazil
| | | | - Maria Caroline Oliveira
- Natural Resource Institute, Federal University of Itajubá, Itajubá, Minas Gerais, 37500-903, Brazil
| | | | | | - Cláudio Mudadu Silva
- Cellulose and Paper Laboratory, Forestry Engineering Department, Federal University of Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - André Aguiar
- Natural Resource Institute, Federal University of Itajubá, Itajubá, Minas Gerais, 37500-903, Brazil.
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Rizzo PF, Young BJ, Pin Viso N, Carbajal J, Martínez LE, Riera NI, Bres PA, Beily ME, Barbaro L, Farber M, Zubillaga MS, Crespo DC. Integral approach for the evaluation of poultry manure, compost, and digestate: Amendment characterization, mineralization, and effects on soil and intensive crops. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 139:124-135. [PMID: 34968898 DOI: 10.1016/j.wasman.2021.12.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/06/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The egg industry has increased its production worldwide during the last decades. Several waste management strategies have been proposed to treat large volumes of poultry manure. Composting and anaerobic digestion are the main stabilization processes used. However, there are disagreements on the criteria for applying raw and treated poultry manure to the soil. We studied the relationship between physicochemical, toxicological, microbiological, parasitological, and metabarcoding parameters of raw and treated poultry manure (compost and digestate). Subsequently, we evaluated the mineralization of C, N and P, and the effects of amended soil on horticultural and ornamental crops. Compost and digestate presented better general conditions than poultry manure for use as organic soil amendments. The highest pathogenic microorganism content (total and fecal coliforms, Escherichia coli, and Salmonella spp.) was recorded for poultry manure. Multivariate analyses allowed associating a lower phytotoxicity with compost and a higher microbial diversity with digestate. Therefore, only compost presented stability and maturity conditions. We found high released CO2-C, N loss, and P accumulation in soil amended with a high dose of poultry manure during mineralization. However, high doses of poultry manure and digestate increased the biomass production in the valorization assay. We recommend the soil application of stabilized and mature poultry manure-derived amendments, which reduce the negative impacts on the environment and promote more sustainable practices in agricultural systems.
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Affiliation(s)
- Pedro Federico Rizzo
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Laboratorio de Transformación de Residuos, Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
| | - Brian Jonathan Young
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Laboratorio de Transformación de Residuos, Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
| | - Natalia Pin Viso
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Agrobiotecnología y Biología Molecular (IABiMo), Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
| | - Jazmín Carbajal
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Laboratorio de Transformación de Residuos, Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
| | - Laura Elizabeth Martínez
- Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria Mendoza, San Martin 3853, M5534, Luján de Cuyo, Mendoza, Argentina.
| | - Nicolás Iván Riera
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Laboratorio de Transformación de Residuos, Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
| | - Patricia Alina Bres
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Laboratorio de Transformación de Residuos, Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
| | - María Eugenia Beily
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Laboratorio de Transformación de Residuos, Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
| | - Lorena Barbaro
- Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria Cerro Azul, Ruta Nacional 14. Km. 836, 3313, Cerro Azul, Misiones, Argentina.
| | - Marisa Farber
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Agrobiotecnología y Biología Molecular (IABiMo), Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
| | - Marta Susana Zubillaga
- Cátedra de Fertilidad y Fertilizantes, Departamento de Ingeniería Agrícola y Uso de la Tierra, Facultad de Agronomía, Universidad de Buenos Aires (UBA), Av. San Martín 4453, C1417DSE Buenos Aires, Argentina.
| | - Diana Cristina Crespo
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Laboratorio de Transformación de Residuos, Las Cabañas y Los Reseros s/n, 1686, Hurlingham, Buenos Aires, Argentina.
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11
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A New Anodic Electrochemiluminescence of Tris(2,2′- bipyridine)ruthenium(II) with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide as a Coreactant for Determination of Hydrogen peroxide. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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12
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Machine Learning Approach to Predict Quality Parameters for Bacterial Consortium-Treated Hospital Wastewater and Phytotoxicity Assessment on Radish, Cauliflower, Hot Pepper, Rice and Wheat Crops. WATER 2022. [DOI: 10.3390/w14010116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Raw hospital wastewater is a source of excessive heavy metals and pharmaceutical pollutants. In water-stressed countries such as Pakistan, the practice of unsafe reuse by local farmers for crop irrigation is of major concern. In our previous work, we developed a low-cost bacterial consortium wastewater treatment method. Here, in a two-part study, we first aimed to find what physico-chemical parameters were the most important for differentiating consortium-treated and untreated wastewater for its safe reuse. This was achieved using a Kruskal–Wallis test on a suite of physico-chemical measurements to find those parameters which were differentially abundant between consortium-treated and untreated wastewater. The differentially abundant parameters were then input to a Random Forest classifier. The classifier showed that ‘turbidity’ was the most influential parameter for predicting biotreatment. In the second part of our study, we wanted to know if the consortium-treated wastewater was safe for crop irrigation. We therefore carried out a plant growth experiment using a range of popular crop plants in Pakistan (Radish, Cauliflower, Hot pepper, Rice and Wheat), which were grown using irrigation from consortium-treated and untreated hospital wastewater at a range of dilutions (turbidity levels) and performed a phytotoxicity assessment. Our results showed an increasing trend in germination indices and a decreasing one in phytotoxicity indices in plants after irrigation with consortium-treated hospital wastewater (at each dilution/turbidity measure). The comparative study of growth between plants showed the following trend: Cauliflower > Radish > Wheat > Rice > Hot pepper. Cauliflower was the most adaptive plant (PI: −0.28, −0.13, −0.16, −0.06) for the treated hospital wastewater, while hot pepper was susceptible for reuse; hence, we conclude that bacterial consortium-treated hospital wastewater is safe for reuse for the irrigation of cauliflower, radish, wheat and rice. We further conclude that turbidity is the most influential parameter for predicting bio-treatment efficiency prior to water reuse. This method, therefore, could represent a low-cost, low-tech and safe means for farmers to grow crops in water stressed areas.
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Wang C, Zhang J, Du J, Zhang P, Zhao Z, Shi W, Cui F. Rapid degradation of norfloxacin by VUV/Fe 2+/H 2O 2 over a wide initial pH: Process parameters, synergistic mechanism, and influencing factors. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125893. [PMID: 34492831 DOI: 10.1016/j.jhazmat.2021.125893] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 04/07/2021] [Accepted: 04/10/2021] [Indexed: 06/13/2023]
Abstract
Vacuum UV (VUV) technology has attracted much attention because it effectively splits water to generate reactive oxygen species (ROS) in situ and has the advantages of UV. So far, the synergistic mechanisms, formation pathways and contributions of ROS in VUV/Fe2+/H2O2 process have not been extensively studied. Herein, complete removal (at 4 min) and 63.3% mineralization (at 8 min) of 45 μM norfloxacin (NOR) were achieved at neutral pH by VUV/Fe2+/H2O2 (90 μM Fe2+ and 3 mM H2O2). Compared with its subsystems, VUV/Fe2+/H2O2 can not only increase the pseudo-first-order reaction rate constant of NOR removal by 2.3-14.9 times and increase the mineralization by 20.4-59.4%, but also reduce the residual ratio of H2O2 by 19.9-70.1% and reduce total cost by 20.0-68.0%. The synergy factor of VUV/Fe2+/H2O2 was 3.97, which was attributed to the VUV irradiation promoting iron redox cycle and H2O2 decomposition. Moreover, hydroxyl radical and superoxide radical, which were identified as the main ROS, contributed 79.07% and 18.47% to NOR removal, respectively. Degradation pathways of NOR were proposed. Furthermore, effects of coexisting ions and dissolved organic matter were investigated. As an energy-saving and efficient process, the satisfactory results of VUV/Fe2+/H2O2 applied in real waters also highlight its application potential.
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Affiliation(s)
- Chuang Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China
| | - Jing Zhang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Jinying Du
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Pengfei Zhang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Zhiwei Zhao
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China.
| | - Wenxin Shi
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Fuyi Cui
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China.
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14
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Ayyıldız MF, Şaylan M, Bozyiğit GD, Chormey DS, Özdemir OK, Büyükpınar Ç, Bakırdere S. Surface modified iron magnetic nanoparticles assisted Fenton digestion and extraction method for cadmium determination. Anal Biochem 2021; 629:114309. [PMID: 34270997 DOI: 10.1016/j.ab.2021.114309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 07/11/2021] [Accepted: 07/12/2021] [Indexed: 11/15/2022]
Abstract
This study presents a Fenton digestion method for milk samples based on UV irradiation for cadmium determination using flame atomic absorption spectrometry. The method was developed as an alternative to microwave digesters, using very basic apparatus and easy to acquire chemicals. Fenton digestion process was performed by the help of citric acid coated magnetic nanoparticles. Optimum conditions of the digestion process were applied to milk samples to evaluate analytical performance of the method. Limit of detection and limit of quantification values calculated for cadmium in milk were 0.53 and 1.8 mg/L, respectively. The method was applied to three different milk samples to validate the method's suitability and accuracy. Percent recovery values calculated for the samples spiked at two different concentrations ranged between 86 and 111%. Due to differences in the content of the spiked and control/standard milk samples, exact matrix matching calibration strategy using the same brand of milk sample in the preparation of calibration standard was employed and the accuracy of cadmium quantification was greatly enhanced (≈100%).
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Affiliation(s)
| | - Meltem Şaylan
- Yıldız Technical University, Department of Chemistry, 34220, İstanbul, Turkey
| | - Gamze Dalgıç Bozyiğit
- Yıldız Technical University, Department of Environmental Engineering, 34220, İstanbul, Turkey
| | | | - Oğuz Kaan Özdemir
- Yıldız Technical University, Department of Metallurgical and Materials Engineering, 34220, İstanbul, Turkey
| | - Çağdaş Büyükpınar
- Yıldız Technical University, Department of Chemistry, 34220, İstanbul, Turkey
| | - Sezgin Bakırdere
- Yıldız Technical University, Department of Chemistry, 34220, İstanbul, Turkey; Turkish Academy of Sciences (TÜBA), Vedat Dalokay Street, No: 112, Çankaya, 06670, Ankara, Turkey.
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15
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Zarei Mahmoudabadi T, Ehrampoush MH, Talebi P, Fouladi-Fard R, Eslami H. Comparison of poly ferric chloride and poly titanium tetrachloride in coagulation and flocculation process for paper and cardboard wastewater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:27262-27272. [PMID: 33511532 DOI: 10.1007/s11356-021-12675-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
The current study investigated the efficiency of poly ferric chloride (PFC) and poly titanium tetrachloride (PTC) in coagulation-flocculation process for treatment of paper and cardboard wastewater. The effect of pH (5-11), coagulant concentrations (100-1000 mg/L), mixing rate (10-60 rpm), mixing time (5-25 min), and settling time (5-30 min) were examined. The results showed that the removal efficiency for turbidity, total suspended solids (TSS), and chemical oxygen demand (COD) by PFC and PTC coagulants increased with pH rising up to 9 for the former and 7 for the latter coagulant. Furthermore, the removal efficiency for the afore-mentioned parameters increased along with a 30 rpm increase in the mixing rate, while the mixing time reached 20 min. It was also found that the best removal efficiencies for turbidity, TSS, and COD by PFC under optimal conditions (pH 9, coagulant dose 800 mg/L, and settling time of 25 min) were 97.11%, 99.1%, and 84.91%, respectively. In addition, the removal efficiencies for PTC (optimal conditions of pH 7, coagulant dose 600 mg/L, and settling time of 15 min) were found to be 98.29%, 99.29%, and 86.42%, respectively. Water recovery and the produced sludge volume by PFC were 80% and 200 cm3, respectively, in the settling time of 25 min and for PTC were 81.5% and 185 cm3, respectively, in the settling time of 15 min. Costs of the coagulation-flocculation process for treatment 1 m3 of paper and cardboard wastewater using PTC and PFC were 0.42 $ and 0.32 $, respectively. Finally, it can be concluded that compared to PFC, PTC with higher settling rate has a greater efficiency for treatment of paper and cardboard wastewater.
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Affiliation(s)
- Tahereh Zarei Mahmoudabadi
- Environmental Science and Technology Research Center, Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohammad Hassan Ehrampoush
- Environmental Science and Technology Research Center, Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Parvaneh Talebi
- Environmental Science and Technology Research Center, Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Reza Fouladi-Fard
- Research Center for Environmental Pollutants, Department of Environmental Health Engineering, Faculty of Health, Qom University of Medical Sciences, Qom, Iran
| | - Hadi Eslami
- Occupational Health and Safety Research Center, NICICO, World Safety Organization and Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
- Department of Environmental Health Engineering, School of Health, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
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Gong Y, Ma Y, Cheung PCK, You L, Liao L, Pedisić S, Kulikouskaya V. Structural characteristics and anti-inflammatory activity of UV/H 2O 2-treated algal sulfated polysaccharide from Gracilaria lemaneiformis. Food Chem Toxicol 2021; 152:112157. [PMID: 33789119 DOI: 10.1016/j.fct.2021.112157] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/02/2021] [Accepted: 03/22/2021] [Indexed: 12/11/2022]
Abstract
The study aimed to study the effects on structural characteristics and anti-inflammatory activities of algal sulfated polysaccharides isolated from Gracilaria lemaneiformis (GLP) after a combined treatment of UV irradiation (average irradiance of 6500 mJ/cm2) and H2O2 (50 mmol/L) for various time periods up to 60 min. After a 30-min treatment, the molecular weight and particle size of GLP was decreased by 15 and 2.6 fold, respectively with small but significant decrease in the contents of total sugars, uronic acids and proteins. There seemed to have no starch and the presence of longer side chains of branches in the GLP samples before and after UV/H2O2 treatment based on the I2-KI assay. Scanning electron microscope and atomic force microscope analysis confirmed that the UV/H2O2 treatment could modify the surface morphology of GLP. GLP treated for 5 min possessed the strongest in vitro anti-inflammatory activity by inhibiting the production of nitric oxide, tumor necrosis factor-α and interleukin-6 by 60.49%, 62.81% and 36.29%, respectively in IEC-6 cells when compared to the model. Therefore, UV/H2O2 treatment had the potential to enhance the anti-inflammatory activity of algal sulfated polysaccharides.
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Affiliation(s)
- Yufeng Gong
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510640, China
| | - Yongxuan Ma
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510610, China; Guangzhou Liheng Clinical Nutrition Co. Ltd., Guangzhou, 510610, Guangdong, China
| | - Peter Chi-Keung Cheung
- Food & Nutritional Sciences Program, School of Life Sciences, Chinese University of Hong Kong, Hong Kong, China
| | - Lijun You
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510640, China; Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou, 510640, Guangdong, China.
| | - Lan Liao
- Department of Food Science, College of Food Science and Technology, Foshan University, Foshan, Guangdong, 528000, China
| | - Sandra Pedisić
- Faculty of Food Technology & Biotechnology, University of Zagreb, Prolaz Kasandrića 6, 23000, Zadar, Croatia
| | - Viktoryia Kulikouskaya
- Institute of Chemistry of New Materials, National Academy of Sciences of Belarus. 36F. Skaryna Str., Minsk, Belarus, 220141
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