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Fan X, Wang S, Zhang Y, Zhao M, Zhou N, Fan S. Effect of citric acid modification on the properties of hydrochar and pyrochar and their adsorption performance toward methylene blue: crucial roles of minerals and oxygen functional groups. ENVIRONMENTAL MONITORING AND ASSESSMENT 2024; 196:664. [PMID: 38926195 DOI: 10.1007/s10661-024-12836-3] [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: 12/25/2023] [Accepted: 06/15/2024] [Indexed: 06/28/2024]
Abstract
Modification is widely used to enhance the adsorption performance of pristine hydrochar (HBC) and pyrochar (BC). However, comparisons between modified HBC and BC toward pollutant removal have rarely been reported. In this study, pristine HBC and BC derived from rice straw were first produced, and then citric acid (CA) was used as a modifier to synthesize CA-modified HBC (CAHBC) and CA-modified BC (CABC). Furthermore, the adsorption performance of biochars toward methylene blue (MB) was investigated. The results showed that BC exhibits relatively rough surfaces and contains more minerals (ash), whereas HBC has plentiful O-containing functional groups and fewer minerals. CA modification partially removed minerals from the surface of BC, which weakened the ion exchange, surface complexation, and n-π interaction, resulting in a lower adsorption ability toward MB. By contrast, CA produced more O-containing functional groups on the surface of HBC, which strengthened the hydrogen bonding and electrostatic interaction, thus increasing the adsorption capacity toward MB. The two-compartment model showed a good fit to the adsorption process of MB on CAHBC, and the isotherm data for MB adsorption by HBC and CAHBC are suitable for the Freundlich model. The highest adsorption amount of MB using CAHBC was 80.13 mg·g-1, which was 27.66% higher than that for CABC. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis indicated that the carboxyl groups in the surface functional groups of CAHBC played a crucial role in the MB adsorption process. In addition, CAHBC showed a good performance for a wide range of pH values (4.0-10.0) and under the interference of coexisting ions, and also presented a recycling ability. Furthermore, the adsorption of MB on CAHBC biochar was a spontaneous, exothermic, degree-of-randomness-increasing process. Consequently, CA modification of HBC is a promising strategy and could be used for MB removal from aquatic environments.
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Affiliation(s)
- Xinru Fan
- School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Shuo Wang
- School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Yushan Zhang
- School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Manquan Zhao
- School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Na Zhou
- School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Shisuo Fan
- School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China.
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Eleryan A, Güner EK, Hassaan M, El-Nemr MA, Ragab S, El Nemr A. Mandarin biochar-CO-TETA was utilized for Acid Red 73 dye adsorption from water, and its isotherm and kinetic studies were investigated. Sci Rep 2024; 14:13021. [PMID: 38844483 PMCID: PMC11156941 DOI: 10.1038/s41598-024-62870-x] [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: 04/09/2024] [Accepted: 05/22/2024] [Indexed: 06/09/2024] Open
Abstract
Environmental pollution is a major issue today due to the release of dyestuff waste into the environment through industrial wastewater. There is a need for affordable and effective adsorbents to remove harmful dyes from industrial waste. In this study, Mandarin biochar-CO-TETA (MBCOT) adsorbent was prepared and used to remove Acid Red 73 (AR73) dye from aqueous solutions. The efficiency of dye removal was influenced by various factors such as solution pH, contact time, initial AR73 dye concentration, and MBCOT dosage. All experiments were conducted at 25 ± 2 °C, and the optimal pH was determined to be 1.5. The optimal conditions for dye removal were found to be an AR73 dye concentration of 100 mg/L, an MBCOT dosage of 1.5 g/L, and a contact time of 150 min, resulting in a 98.08% removal rate. Various models such as pseudo-first-order (PFO), pseudo-second-order (PSO), film diffusion (FD), and intraparticle diffusion (IPD) were used to determine the adsorption kinetics of AR73 dye onto MBCOT. The results showed that the PSO model best explains the AR73 dye adsorption. Furthermore, Langmuir and Freundlich's isotherm models were studied to explain the adsorption mechanism using experimental data. The adsorption capacities at equilibrium (qe) in eliminating AR73 dye varied from 92.05 to 32.15, 128.9 to 65.39, 129.25 to 91.69, 123.73 to 111.77, and 130.54 to 125.01 mg/g. The maximum adsorption capacity (Qm) was found to be 140.85 mg/g. In conclusion, this study demonstrates that biochar produced from mandarin peels has the potential to be an effective and promising adsorbent for removing AR73 dye from water.
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Affiliation(s)
- Ahmed Eleryan
- Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
| | - Eda Keleş Güner
- Uzumlu Vocational School, Department of Property and Security, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | - Mohamed Hassaan
- Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
| | - Mohamed A El-Nemr
- Department of Chemical Engineering, Faculty of Engineering, Minia University, Minia, 61519, Egypt
| | - Safaa Ragab
- Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
| | - Ahmed El Nemr
- Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt.
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He Y, Deng Q, Cao L, Luo C, Zhao W, Tao H, Chen L, Zhu Y, Zhang J, Mo X, Mi B, Wu F. Highly efficient Ni(II) adsorption by industrial lignin-based biochar: a pivotal role of dissolved substances within biochar. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:10874-10886. [PMID: 38212563 DOI: 10.1007/s11356-024-31889-y] [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: 09/29/2023] [Accepted: 01/02/2024] [Indexed: 01/13/2024]
Abstract
In the context of carbon neutrality, promoting resource utilization of industrial alkali lignin addressing heavy metal pollution is crucial for China's pollution alleviation and carbon reduction. Microwave pyrolysis produced functionalized biochar from industrial alkali lignin for Ni(II) adsorption. LB400 achieved 343.15 mg g-1 saturated adsorption capacity in 30 min. Pseudo-second-order kinetic and Temkin isotherm models accurately described the adsorption, which was endothermic and spontaneous (ΔGϴ < 0, ΔHϴ > 0). Quantitative analysis revealed that both dissolved substances and carbon skeleton from biochar contributed to adsorption, with the former predominates (93.76%), including mineral precipitation NiCO3 (Qp) and adsorption of dissolved organic matter (QDOM). Surface complexation (Qc) and ion exchange (Qi) on the carbon skeleton accounted for 6.3%. Higher biochar preparation temperature reduced Ni(II) adsorption by dissolved substances. Overall, biochar which comes from the advantageous disposal of industrial lignin effectively removes Ni(II) contamination, encouraging ecologically sound treatment of heavy metal pollution and sustainable resource utilization.
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Affiliation(s)
- Yanying He
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Qianyi Deng
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Liwen Cao
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Cheng Luo
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Wenjie Zhao
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Honglin Tao
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Long Chen
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Yule Zhu
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Jing Zhang
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Xueying Mo
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
| | - Baobin Mi
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China
- Research Institute of Vegetables, Hunan Academy of Agriculture Sciences, Changsha, 410125, China
| | - Fangfang Wu
- School of Chemistry and Materials Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China.
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Parlayıcı Ş. Novel chitosan/citric acid modified pistachio shell/halloysite nanotubes cross-linked by glutaraldehyde biocomposite beads applied to methylene blue removal. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:11-26. [PMID: 37272624 DOI: 10.1080/15226514.2023.2216309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, Cht/PS-CA/HNT biocomposite adsorbent was synthesized using halloysite nanotube as nanomaterial, chitosan which is a biodegradable and biocompatible biopolymer, pistachio shell as biomass source, citric acid as biomass modifier. The removal of methylene blue dyestuff on the synthesized new Cht/PS-CA/HNT from the aqueous medium by adsorption method was investigated. Experimental parameters such as dye concentration, contact time, amount of adsorbent, solution pH and temperature, which affect the adsorption process, were investigated. The adsorption experimental data were analyzed with the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherms, which are widely used in aqueous solutions, and it was decided that Langmuir is the most suitable isotherm. The maximum adsorption capacity of the monolayer was calculated to be 111.14 mg/g. Optimum contact time and adsorbent dose were determined as 90 min and 1 g/L. Adsorption experimental data were applied for Pseudo-first-order and Pseudo-second-order kinetic models and it was decided that the most suitable kinetic model was pseudo-second-order. Thermodynamic evaluation of adsorption showed that adsorption is endothermic and adsorption is spontaneous.
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Affiliation(s)
- Şerife Parlayıcı
- Department of Chemical Engineering, Konya Technical University, Konya, Turkey
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Exploring the Biosorption of Methylene Blue Dye onto Agricultural Products: A Critical Review. SEPARATIONS 2022. [DOI: 10.3390/separations9090256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Due to their higher specific area and, in most cases, higher adsorption capacity, nanomaterials are noteworthy and attractive adsorbents. Agricultural products that are locally available are the best option for removing methylene blue (MB) dye from aqueous solutions. Because it is self-anionic, FT-IR and SEM investigations of biosorption have confirmed the role of the functional group and its contribution to the formation of pores that bind cationic dye. It is endothermic if the adsorption of MB by an adsorbent is high as the temperature increases; on the other hand, exothermic if it is high as the temperature decreases. A basic medium facilitates adsorption with respect to pH; adsorption is proportional to the initial concentration at a certain level before equilibrium; after equilibrium, adsorption decreases. A pseudo-second-order model applies for certain agricultural products. As per plotted graph for the solid-phase concentration against the liquid-phase concentration, the Langmuir adsorption isotherm model is favored; this model describes a situation in which a number of molecules are adsorbed by an equal number of available surface sites, and there is no interaction between adsorbate molecules once all sites are occupied. In contrast, the Freundlich model depicts non-ideal multi-layer sorption onto heterogeneous surfaces via numerical analysis; with a value of n = 1, the result is a linear isotherm. If the value of n < 1 or n > 1, then it is chemical or physical adsorption, respectively. Based on an EDX analysis, relevant elements are confirmed. BET analysis confirms the surface area. Nanoproducts categorized as agricultural products exhibit the aforementioned tendency. Even though nanoparticles show positive outcomes in terms of higher adsorption, a high specific area for the targeted pollutant is needed in real-world applications. In the relevant sections herein, the behavior of thermodynamic parameters, such as enthalpy, entropy, and Gibbs free energy, are examined. There is some question as to which form of agricultural waste is the most effective adsorption medium. There is no direct answer because every form of agricultural waste has its own distinct chemical and physical characteristics, such as porosity, surface area, and strength.
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Bollinger JC, Tran HN, Lima EC. Comments on “removal of methylene blue dye from aqueous solution using citric acid modified apricot stone”. CHEM ENG COMMUN 2022. [DOI: 10.1080/00986445.2022.2111556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - Hai Nguyen Tran
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang, Vietnam
| | - Eder C. Lima
- Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
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Xie LQ, Jiang XY, Yu JG. A Novel Low-Cost Bio-Sorbent Prepared from Crisp Persimmon Peel by Low-Temperature Pyrolysis for Adsorption of Organic Dyes. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27165160. [PMID: 36014402 PMCID: PMC9416227 DOI: 10.3390/molecules27165160] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/07/2022] [Accepted: 08/10/2022] [Indexed: 12/07/2022]
Abstract
In order to properly reuse food waste and remove various contaminants from wastewater, the development of green, sustainable and clean technologies has demonstrated potential in the efficient inhibition of secondary pollution to the environment. In this study, an economical and green method was used to prepare biochar from crisp persimmon peel (CPP) using flash-vacuum pyrolysis at different temperatures (200–700 °C; referred to as CPP200–CPP700). CPP200 has high polarity, low aromaticity and high oxygen-containing functional groups that exhibit superior MB adsorption capabilities. CPP200 that was prepared at a relatively low temperature of 200 °C exhibited a high adsorption capacity of 59.72 mg/g toward methylene blue (MB), which was relatively higher than that for alizarin yellow R (4.05 mg/g) and neutral red (39.08 mg/g), indicating that CPP200 possesses a higher adsorption selectivity for cationic dyes. Kinetics investigation revealed that the kinetic data of CPP200 for the adsorption of MB was better fitted by a linear pseudo-second-order model. Isothermal studies indicated that the linear Langmuir model was more suitable for describing the adsorption process. The adsorption thermodynamics illustrated that the adsorption of MB onto CPP200 was spontaneous and endothermic. EDS and IR analyses of CPP200 for both pre- and post-adsorption of MB showed that electrostatic interactions between oxygen-containing groups on biochar and target MB dominated the adsorption procedure, in addition to hydrogen bonding interactions. Reusability tests confirmed the excellent regeneration characteristics of CPP200, indicating that CPP200 may be used as a green, sustainable, highly efficient and recyclable adsorbent for the selective removal of cationic organic dyes.
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