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Rabiee Abyaneh M, Nabi Bidhendi G, Daryabeigi Zand A. Pb(ΙΙ), Cd(ΙΙ), and Mn(ΙΙ) adsorption onto pruning-derived biochar: physicochemical characterization, modeling and application in real landfill leachate. Sci Rep 2024; 14:3426. [PMID: 38341513 PMCID: PMC11306770 DOI: 10.1038/s41598-024-54028-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 02/07/2024] [Indexed: 02/12/2024] Open
Abstract
The aim of this study was to systemically evaluate how different pyrolysis temperatures (400, 550, and 700 °C) and particle sizes (1-2 mm and 63-75 µm) were influenced biochar evolution, made from urban pruning waste, during pyrolysis process and to establish their relationships with biochar potential for removal of lead (Pb), cadmium (Cd), and manganese (Mn) from real municipal solid waste landfill leachate. The effects of pH (2-7), contact time (30-300 min) and adsorbent dosage (0.1-5 g L-1) on heavy metals removal were also examined. The results showed that physicochemical properties of biochar were greatly influenced by pyrolysis temperature. Particle size, however, showed little influence on biochar characteristics (p > 0.05). The yield, volatile matter, hydrogen and oxygen contents, and surface functional groups decreased consistently with increasing pyrolysis temperature. An increase in the pH, electrical conductivity, ash, fixed carbon, and specific surface area values was also found. In biochar samples formed at high temperatures (i.e., 550 and 700 °C), Fourier transform infrared spectroscopy-FTIR studies confirmed the increase in aromaticity. Field emission scanning electron microscopy-FESEM images showed differences in the microporous structure and lower size pores at higher temperatures. Biochar pyrolyzed at 700 °C with a particle size of 63-75 µm (i.e., Lv700-63) showed the highest removal efficiency performance. Pb and Cd ions were completely removed (100%) by 0.2 g L-1 Lv700-63 at 7.0 pH and contact times of 120 and 90 min, respectively. The maximum percentage removal of Mn was 86.20% at optimum conditions of 0.2 g L-1 Lv700-63 dosage, 7.0 pH, and 180 min contact time. The findings suggests that the surface complexation, π-electron coordination, and cation exchange were the dominant mechanisms for the Pb, Cd, and Mn removal onto Lv700-63.
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Affiliation(s)
- Maryam Rabiee Abyaneh
- Department of Environmental Engineering, University of Tehran, Kish International Campus, Kish, Iran.
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Mushtaq Q, Joly N, Martin P, Qazi JI. Optimization of Alkali Treatment for Production of Fermentable Sugars and Phenolic Compounds from Potato Peel Waste Using Topographical Characterization and FTIR Spectroscopy. Molecules 2023; 28:7250. [PMID: 37959670 PMCID: PMC10648272 DOI: 10.3390/molecules28217250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023] Open
Abstract
Potato peel waste (PPW) was utilized as a bio-template for the production of valuable compounds such as reducing sugars (RS), total sugar (TS) and total phenolic compounds (TPC). Two methods of alkali treatments, i.e., chemical (NaOH) and thermochemical (NaOH assisted with autoclaving) processes, were employed for the deconstruction of PPW. Response surface methodology (RSM) was used to study the effects of alkali concentration (0.6-1.0 w/v), substrate concentration (5-15 g) and time (4-8 h) on the extraction of RS, TS and TP from PPW. The application of alkali plus steam treatment in Box-Behnken design (BBD) with three levels yielded the optimum releases of RS, TS and TP as 7.163, 28.971 and 4.064 mg/mL, respectively, corresponding to 10% substrate loading, in 0.6% NaOH for 8 h. However, the alkali treatment reported optimum extractions of RS, TS and TP as 4.061, 17.432 and 2.993 mg/mL, respectively. The thermochemical pretreatment was proven a beneficial process as it led to higher productions of TP. FTIR and SEM were used to analyze the deterioration levels of the substrate. The present work was used to explore the sustainable management of PPW, which is a highly neglected substrate bioresource but is excessively dumped in open environment, raising environmental concerns. The cost-effective methods for the breakdown of PPW starch into fermentable sugars might be utilized to extract valuable compounds.
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Affiliation(s)
- Qudsia Mushtaq
- Microbial Biotechnology Laboratory, Institute of Zoology, University of the Punjab, New Campus, Lahore 54590, Pakistan;
| | - Nicolas Joly
- University Artois, Unilasalle, ULR7519—Unité Transformations & Agro-Ressources, F-62408 Béthune, France;
| | - Patrick Martin
- University Artois, Unilasalle, ULR7519—Unité Transformations & Agro-Ressources, F-62408 Béthune, France;
| | - Javed Iqbal Qazi
- Microbial Biotechnology Laboratory, Institute of Zoology, University of the Punjab, New Campus, Lahore 54590, Pakistan;
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Gao JJ, Peng RH, Zhu B, Tian YS, Xu J, Wang B, Fu XY, Han HJ, Wang LJ, Zhang FJ, Zhang WH, Deng YD, Wang Y, Li ZJ, Yao QH. Enhanced phytoremediation of TNT and cobalt co-contaminated soil by AfSSB transformed plant. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 220:112407. [PMID: 34119926 DOI: 10.1016/j.ecoenv.2021.112407] [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: 01/08/2021] [Revised: 05/23/2021] [Accepted: 06/03/2021] [Indexed: 06/12/2023]
Abstract
2,4,6-trinitrotoluene (TNT) and cobalt (Co) contaminants have posed a severe environmental problem in many countries. Phytoremediation is an environmentally friendly technology for the remediation of these contaminants. However, the toxicity of TNT and cobalt limit the efficacy of phytoremediation application. The present research showed that expressing the Acidithiobacillus ferrooxidans single-strand DNA-binding protein gene (AfSSB) can improve the tolerance of Arabidopsis and tall fescue to TNT and cobalt. Compared to control plants, the AfSSB transformed Arabidopsis and tall fescue exhibited enhanced phytoremediation of TNT and cobalt separately contaminated soil and co-contaminated soil. The comet analysis revealed that the AfSSB transformed Arabidopsis suffer reduced DNA damage than control plants under TNT or cobalt exposure. In addition, the proteomic analysis revealed that AfSSB improves TNT and cobalt tolerance by strengthening the reactive superoxide (ROS) scavenging system and the detoxification system. Results presented here serve as strong theoretical support for the phytoremediation potential of organic and metal pollutants mediated by single-strand DNA-binding protein genes. SUMMARIZES: This is the first report that AfSSB enhances phytoremediation of 2,4,6-trinitrotoluene and cobalt separately contaminated and co-contaminated soil.
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Affiliation(s)
- Jian-Jie Gao
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Ri-He Peng
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Bo Zhu
- Key Laboratory for the Conservation Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu 241000, Anhui, China
| | - Yong-Sheng Tian
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Jing Xu
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Bo Wang
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Xiao-Yan Fu
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Hong-Juan Han
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Li-Juan Wang
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Fu-Jian Zhang
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Wen-Hui Zhang
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Yong-Dong Deng
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Yu- Wang
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Zhen-Jun Li
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China.
| | - Quan-Hong Yao
- Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China.
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K2CO3-Activated Pomelo Peels as a High-Performance Adsorbent for Removal of Cu(II): Preparation, Characterization, and Adsorption Studies. J CHEM-NY 2021. [DOI: 10.1155/2021/9940577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Activated carbons (ACs) were prepared from pomelo peels by K2CO3 activation and used as an adsorbent (PAC) for the removal of Cu(II) from aqueous solutions. BET, SEM, and FT-IR were employed for the characterization of the obtained ACs. The optimum ACs were reported at activation temperature of 850°C, activation time of 60 min, and impregnation ratio of 3, which had a high surface area (1213 m2/g) and total pore volume (0.57 cm3/g). The resulting ACs were used for the adsorption of Cu(II) from aqueous solutions in the batch mode and yielded a superior adsorption capacity of 139.08 mg/g. The pH of optimum adsorption was determined as 5. Pseudo first-order model, pseudo second-order model, and intraparticle diffusion model were applied to describe the adsorption processes. The adsorption kinetic data were found to follow the pseudo second-order model. The adsorption isotherms data were analyzed using Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich models. The Langmuir model was found to provide the best fit, and the calculated adsorption capacity was 151.35 mg/g.
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Yang S, Feng Y, Gao D, Wang X, Suo N, Yu Y, Zhang S. Electrocatalysis degradation of tetracycline in a three-dimensional aeration electrocatalysis reactor (3D-AER) with a flotation-tailings particle electrode (FPE): Physicochemical properties, influencing factors and the degradation mechanism. JOURNAL OF HAZARDOUS MATERIALS 2021; 407:124361. [PMID: 33246816 DOI: 10.1016/j.jhazmat.2020.124361] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 06/12/2023]
Abstract
Novel particle electrodes, i.e. flotation tailings particle electrode (FPE), were prepared using flotation tailings, garden soil, and soluble starch with a mass ratio of 16:3:1, and then used in tetracycline wastewater treatment. The physicochemical properties of FPE were systematically characterized using SEM, XRD, FT-IR and XRF. Tetracycline adsorption and its adsorption mechanism onto FPE was explored for the first time. Parameters affecting FPE's degradation efficiency and energy consumption such as current density, electrolysis time, initial concentration, initial pH and aeration rate were examined. The electrocatalytic degradation of tetracycline shows that the degradation of tetracycline meets the pseudo-first-order kinetics. Moreover, the numbers of •OH produced on the surfaces of the cathode, anode and particle electrode were compared. Results showed that the adsorption-saturated FPE can be regenerated by electrochemical action to induce further absorption and form in-situ electrocatalysis. In order to find out the transformation products in water and degradation pathways of Tetracycline, UHPLC method was used to obtain the degradation pathways for Tetracycline. So, this work could provide a fabrication of high-efficiency and low-cost electrocatalytic for removal of pharmaceuticals pollutants from waste water as well as deeper insight into electrocatalytic mechanism, transformation products, and degradation pathways of Tetracycline in water.
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Affiliation(s)
- Shumin Yang
- School of Civil Engineering and Architecture,University of Jinan, Jinan 250022, China
| | - Yan Feng
- School of Civil Engineering and Architecture,University of Jinan, Jinan 250022, China.
| | - Dong Gao
- Weifang Municipal Engineering Design and ResearchInstitute Company Limited, Weifang 261000, China
| | - Xinwei Wang
- China Urban Construction Design & Research Institute Co. Ltd (Shan Dong), Jinan 250022, China
| | - Ning Suo
- School of Civil Engineering and Architecture,University of Jinan, Jinan 250022, China
| | - Yanzhen Yu
- School of Civil Engineering and Architecture,University of Jinan, Jinan 250022, China; School of Civil Engineering and Architecture, Qilu Institute of Technology, Jinan 250022, China
| | - Shoubin Zhang
- School of Civil Engineering and Architecture,University of Jinan, Jinan 250022, China.
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Pap S, Boyd KG, Taggart MA, Turk Sekulic M. Circular economy based landfill leachate treatment with sulphur-doped microporous biochar. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 124:160-171. [PMID: 33631441 DOI: 10.1016/j.wasman.2021.01.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 12/26/2020] [Accepted: 01/31/2021] [Indexed: 06/12/2023]
Abstract
There is now increasing interest in the creation of a more 'circular economy', with a particular aim to eliminate waste - by design, within which products are optimised to be reused, restored or returned. Here, a sulphur functionalised microporous biochar was synthesised from an abundant biomass waste material (cherry kernels), for the selective removal of Pb(II) from landfill leachate as a representative heavy metal. The production process utilises renewable waste material and removes toxic chemicals. Characterisation of the biochar showed that pyrolysis and functionalisation formed an adsorbent with a microporous structure and rich surface chemical functionality. The adsorption process was optimised using a 'response surface methodology - Box-Behnken Design'. Lead removal efficiency approached 99.9% under optimised experimental conditions, i.e., where the solution pH was 6.0, the biochar dose was 4.0 g/L and the contact time was 47 min. The adsorption process was best described using a Freundlich model. The maximum amount of Pb(II) adsorbed was 44.92 mg/g. The main adsorption mechanisms occurred through outer-sphere (electrostatic attraction) and inner-sphere complexation. Desorption studies showed that three successful regeneration cycles (with acidic deionised water) could be used post pyrolysis. The biochar removed 97% of Pb(II) from landfill leachate samples, as compared to 9.4%, and 7.6% for two commercial activated carbon adsorbents. These findings demonstrate the high selectivity of this biochar towards Pb(II) and its applicability even in the presence of high concentrations of many potentially interfering inorganic and organic ions and compounds.
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Affiliation(s)
- Sabolc Pap
- University of Novi Sad, Faculty of Technical Sciences, Department of Environmental Engineering and Occupational Safety and Health, Trg Dositeja Obradovića 6, 21 000 Novi Sad, Serbia; Environmental Research Institute, University of the Highlands and Islands, Castle Street, Thurso KW14 7JD, UK.
| | - Kenneth G Boyd
- Environmental Research Institute, University of the Highlands and Islands, Castle Street, Thurso KW14 7JD, UK
| | - Mark A Taggart
- Environmental Research Institute, University of the Highlands and Islands, Castle Street, Thurso KW14 7JD, UK
| | - Maja Turk Sekulic
- University of Novi Sad, Faculty of Technical Sciences, Department of Environmental Engineering and Occupational Safety and Health, Trg Dositeja Obradovića 6, 21 000 Novi Sad, Serbia
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Liu HB, Liu SJ, He XS, Dang F, Tang YY, Xi BD. Effects of landfill refuse on the reductive dechlorination of pentachlorophenol and speciation transformation of heavy metals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 760:144122. [PMID: 33341612 DOI: 10.1016/j.scitotenv.2020.144122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 11/20/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Landfill refuse is a mixture of inorganic minerals and organic matter that is capable of undergoing complexation and redox reactions due to its active functional groups. Organic matter often combines with minerals in landfill refuse and it remains unclear whether this combination involves electron transfer. Therefore, the effects of landfill refuse composition on reductive dechlorination and speciation transformation of heavy metals were investigated in this study. Results show that landfill refuse comprises protein- and humic-like substances, aliphatic structures, and a large number of hydroxyl, carboxyl, quinoid and other active functional group. The electron donating capacity (0.09-0.26 μmol/g(C)) of landfill refuse was found to be higher than its electron accepting capacity (0.03-0.23 μmol/g(C)), indicating that electron donating groups (hydroxyl) were the main redox-active moieties, facilitating the reductive dechlorination of pentachlorophenol (PCP) by microorganism. Fe2O3, FeO and SiO2 were the main inorganic minerals affecting PCP dechlorination. The speciation distribution of heavy metals in landfill refuse was determined by the BCR sequential extraction method. Results showed that Zn and Ni have high potential migration capacity, poor stability and the highest bioavailability, while Cr, Cu and Pb are relatively stable and have weak migration potential. The oxygen- and nitrogen-containing functional groups, aliphatic structures and aromatic carbon in landfill refuse can promote the transformation of Ni and Cr from an unstable to stable state. Protein-like substances exhibit a strong Cu binding ability, allowing Cu to combine with organic matter more easily than other assessed heavy metals. Both Fe2O3 and FeO affected the stability of Cu. FeO promoted the stabilization of Zn, whereas Fe2O3 and SiO2 promoted Cu instability. These results could provide some references for the treatment of organic chlorides and the stabilization of heavy metals in landfill refuse in China.
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Affiliation(s)
- Hong-Bao Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Si-Jia Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xiao-Song He
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Fei Dang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yuan-Yuan Tang
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Bei-Dou Xi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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Wang J, Guo X. Adsorption isotherm models: Classification, physical meaning, application and solving method. CHEMOSPHERE 2020; 258:127279. [PMID: 32947678 DOI: 10.1016/j.chemosphere.2020.127279] [Citation(s) in RCA: 467] [Impact Index Per Article: 116.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/28/2020] [Accepted: 05/30/2020] [Indexed: 05/28/2023]
Abstract
Adsorption is widely applied separation process, especially in environmental remediation, due to its low cost and high efficiency. Adsorption isotherm models can provide mechanism information of the adsorption process, which is important for the design of adsorption system. However, the classification, physical meaning, application and solving method of the isotherms have not been systematical analyzed and summarized. In this paper, the adsorption isotherms were classified into adsorption empirical isotherms, isotherms based on Polanyi's theory, chemical adsorption isotherms, physical adsorption isotherms, and the ion exchange model. The derivation and physical meaning of the isotherm models were discussed in detail. In addition, the application of the isotherm models were analyzed and summarized based on over 200 adsorption equilibrium data in literature. The statistical parameters for evaluating the fitness of the models were also discussed. Finally, a user interface (UI) was developed based on Excel software for solving the isotherm models, which was provided in supplemental material and can be easily used to model the adsorption equilibrium data. This paper will provide theoretical basis and guiding methodology for the selection and use of the adsorption isotherms.
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Affiliation(s)
- Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, Tsinghua University, Beijing, 100084, PR China.
| | - Xuan Guo
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China
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Silva JDOD, Santos DEL, Abud AKDS, Oliveira AMD. Characterization of acerola (Malpighia emarginata) industrial waste as raw material for thermochemical processes. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 107:143-149. [PMID: 32283488 DOI: 10.1016/j.wasman.2020.03.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 03/24/2020] [Accepted: 03/28/2020] [Indexed: 06/11/2023]
Abstract
Brazil stands out as one of the largest world powers in the agribusiness sector, and with the increase of production capacity, an enormous amount of waste is generated that cause serious environmental problems. Acerola is evidenced as one of the fruits of growing and important commercialization, contributing significantly to regional development through the export of concentrated powder product. Thus, in order to minimize the environmental impacts generated by the local fruit processing industry, the proximate analysis of its residue after drying in a convective oven at temperatures of 50, 75 and 100 °C was carried out in this work, aiming at the reuse of this residue for thermochemical processes. Moisture, ash, volatile matter (VM), and fixed carbon (FC) content were analyzed, as well as characterizations, such as infrared spectroscopy (FTIR), elemental analysis (CHNO), calorific value (HHV) and thermogravimetry (TG/DTG). The results showed a significant difference in the moisture contents, VM, FC and elemental carbon for the dry residue at 50 °C compared to the temperatures of 75 and 100 °C, while for the ash content there was no significant difference between the temperatures. The dry acerola residue at the three temperatures studied presented adequate properties for thermochemical application, with lignocellulosic compounds that can be converted by thermochemical route, good levels of calorific power, low moisture and ash content, associated with high amount of volatile matter.
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Affiliation(s)
| | - Débora Eloá Lima Santos
- Department of Food Technology, Federal University of Sergipe, 49100-000 São Cristóvão, SE, Brazil
| | - Ana Karla de Souza Abud
- Department of Food Technology, Federal University of Sergipe, 49100-000 São Cristóvão, SE, Brazil
| | - Antonio Martins de Oliveira
- Graduate Program in Chemical Engineering, Federal University of Sergipe, 49100-000 São Cristóvão, SE, Brazil; Department of Food Technology, Federal University of Sergipe, 49100-000 São Cristóvão, SE, Brazil.
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