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Journal articles on the topic 'Ammonium kinetic adsorption'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Kwakye-Awuah, Bright, Linus Kweku Labik, Isaac Nkrumah, and Craig Williams. "Removal of ammonium ions by laboratory-synthesized zeolite linde type A adsorption from water samples affected by mining activities in Ghana." Journal of Water and Health 12, no. 1 (2013): 151–60. http://dx.doi.org/10.2166/wh.2013.093.

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Ammonium ion adsorption by laboratory-synthesized zeolite (linde type A; LTA) was investigated in batch kinetics experiments. Synthesized zeolite LTA was characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy and particle size analysis. Water samples were taken from the Nyam and Tano rivers in Ghana, and 0.8 g of zeolite was added to 100 ml portions of each sample. Portions of the samples were withdrawn every 30 min for 150 min and the concentration of ammonia in each sample was

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2

Guo, Hongwei, Lizhen Tang, Bingji Yan, Kang Wan, and Peng Li. "NaA zeolite derived from blast furnace slag: its application for ammonium removal." Water Science and Technology 76, no. 5 (2017): 1140–49. http://dx.doi.org/10.2166/wst.2017.294.

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In this paper, high value added NaA zeolite material was prepared from blast furnace (BF) slag by hydrothermal method and its adsorption behavior on the removal of ammonium ion was investigated. It was found out that the synthetic NaA cubic zeolite with smaller crystal size obtained at nSiO2/nAl2O3 = 2 and nH2O/nNaOH = 20 showed better adsorption performance. The kinetics of the adsorption of ammonium ion by synthesized NaA zeolite was fitted by the pseudo-second-order kinetic model. The intra-particle diffusion modeling reveals that two mixed rate-controlling mechanisms were involved in the a

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3

Huang, Xiaoming, Ning Wang, Zhang Kang, Xiao Yang, and Min Pan. "An Investigation into the Adsorption of Ammonium by Zeolite-Magnetite Composites." Minerals 12, no. 2 (2022): 256. http://dx.doi.org/10.3390/min12020256.

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The discharging of ammonium from industrial, domestic, and livestock sewage has caused eutrophication of the water environment. The objectives of this study are to synthesize magnetic zeolite (M-Zeo) by an eco-friendly, economical, and easy procedure and to investigate its suitability as an adsorbent to remove ammonium from an aqueous solution. Based on characterization from XRD, BET, and SEM-EDS, Fe3O4 was proved to successfully load on natural zeolite. The effect of pH, temperatures, reacting times, initial ammonium concentrations, and regeneration cycles on ammonium adsorption was examined

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4

Nguyen Thi, Thuy, Van Tran Dang Lan, Hoan Nguyen Xuan, et al. "STUDY ON THE REMOVAL OF AMMONIA IN WASTEWATER USING ADSORBENT PREPARED FROM RICE HULL WITH MAGNESIUM OXIDE MODIFICATION." Vietnam Journal of Science and Technology 58, no. 3A (2020): 113. http://dx.doi.org/10.15625/2525-2518/58/3a/14322.

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This study is aimed to evaluate the ability of magnesium oxide-coated carbonized rice hull (MCRH) material for ammonium removal in synthetic and real domestic wastewater. The MCRH material was prepared using waste rice hull from a household rice-processing factory and magnesium chloride salt via a simple mixing and annealing method. The material was then characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The effects of magnesium chloride modification and environmental condition such as initial ammonium concentration (20 – 100 mg/L), amount of adsorbent (0.8

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5

Šmelcerović, Miodrag, and Miodrag Šmelcerović. "ADSORPTION OF AMMONIA BY BASE ACTIVATED BENTONITE CLAY KINETIC AND EQUILIBRIUM STUDIES." Knowledge International Journal 28, no. 4 (2018): 1251–57. http://dx.doi.org/10.35120/kij28041251m.

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Nitrogen compounds are essential elements for living organisms. The increased concentration of ammonia in ionized (NH4+) and non-ionized form (NH3) in surface waters causes negative effects on aquatic organisms, since it enters into the nitrogen cycle, and thus contributes to the eutrophication of water. The presence of higher concentrations of ammonia in surface waters than natural ones is the result of faecal contamination through the sewage system or runoff from arable areas which were treated with fertilizer. Water contaminated with ammonia can be purified by various methods: biological (n

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6

Dote, Y., T. Sekito, K. Ueda, R. Sakamoto, T. Suzuki, and S. Sano. "Removal of ammonia from aqueous solution for swine wastewater with swine manure compost-based char." Water Practice and Technology 10, no. 2 (2015): 409–14. http://dx.doi.org/10.2166/wpt.2015.051.

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Biochar produced from swine manure compost was used to evaluate the effect of pH, temperature, size of biochar on ammonium adsorption property considering swine wastewater treatment. The Langmuir model was demonstrated to provide the best fit for the adsorption of ammonium on the biochar. Higher temperature and pH promoted the adsorption capacity of the Langmuir model parameter although the effect of particle size of the biochar was little. The kinetic studies suggested that the adsorption of ammonium on the biochar was described by the pseudo-first order kinetic model and the rate constant wa

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7

Khalil, Ahmed, Nikolai Sergeevich, and Vita Borisova. "Removal of ammonium from fish farms by biochar obtained from rice straw: Isotherm and kinetic studies for ammonium adsorption." Adsorption Science & Technology 36, no. 5-6 (2018): 1294–309. http://dx.doi.org/10.1177/0263617418768944.

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Ammonium is a water pollutant that harms the environment, particularly fisheries. Rice straw is also an economic waste of rice, with millions of tons produced per year around the world. In this paper, physical and chemical procedures for the modification of rice straw were studied. The kinetic and isothermal adsorption trends were investigated, including the ammonium removal efficiency, the contact time of the adsorbent, the amount of adsorbent, and the initial concentration of NH4+. The effect of temperature and pH on the adsorption process was discussed. The removal efficiency of NH4+ record

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8

Li, Chengtao, Deyi Kong, Xiaolong Yao, Xiaotao Ma, Chunhui Wei, and Hong Wang. "Resource Recycling Utilization of Distillers Grains for Preparing Cationic Quaternary Ammonium—Ammonium Material and Adsorption of Acid Yellow 11." Sustainability 14, no. 4 (2022): 2469. http://dx.doi.org/10.3390/su14042469.

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Using distillers grains (DG) as raw material after pre-treatment with sodium hydroxide (NaOH) and modified with cationic etherification agent 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC), cationic quaternary ammonium distillers grains adsorption material (CDG) was successfully prepared. The optimal adsorption conditions were an adsorption temperature of 25 °C, adsorption time of 180 min, amount of adsorbent at 8.5 g/L, initial dye concentration of 100 mg/L, and pH of dye solution 7.0. The structure of CDG was characterized by FTIR, EDS, SEM, BET, ultraviolet spectrum analysis, a

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9

Chen, Cheng, Guang Xian Zhang, Feng Xiu Zhang, and Hui Zheng. "Adsorption Kinetics of Reactive Dyes on Silk with Octyl Butyl Dimethyl Ammonium Bromide as Accelerant." Advanced Materials Research 549 (July 2012): 278–82. http://dx.doi.org/10.4028/www.scientific.net/amr.549.278.

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With octyl butyl dimethyl ammonium bromide (OBDAB) as accelerant, adsorption kinetics of dyeing silk with three reactive dyes was studied in this paper. As concentration of OBDAB increased, the dye-uptake rate increased. The highest dye-uptake rates of three reactive dyes could reach to 89.40%~98.98% and the concentration of OBDAB was only 6-8g/L. This showed OBDAB was an effective accelerant. Pseudo first- and second-order kinetic models were used to analyze the adsorption kinetic data. The experimental data were found to follow the second-order kinetic model. Meanwhile, the initial dye adsor

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10

Susilawati, Susilawati, Andriayani Andriayani, Yuan Alfinsyah Sihombing, et al. "Study of Ammonium Adsorption Mechanism in Hydrothermalized Pahae Natural Zeolites: Kinetic and Isotherm Adsorption, and Thermodynamics." Trends in Sciences 22, no. 2 (2024): 8993. https://doi.org/10.48048/tis.2025.8993.

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This paper focuses on the effectiveness of hydrothermalized natural zeolite from Pahae, North Sumatera to remove ammonium ion and analysis the kinetics models of the zeolite adsorption ability, such as isothermic and kinetics adsorption; thermodynamics as well as desorption-regeneration studies. Our findings have demonstrated that natural zeolite shows good performance in terms of for ammonium removal up to 97 % depending on contact time, zeolite loading, initial ammonium concentration and pH. The adsorption kinetics is best estimated by the pseudo-second-order model, whereas the adsorption is

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11

Lawal, J., E. Odebunmi, and F. Adekola. "Removal of heavy metals from aqueous solutions by adsorption using natural and ammonium carbonate modified kaolinite clays." South African Journal of Chemistry 77 (2023): 61–73. http://dx.doi.org/10.17159/0379-4350/2023/v77a09.

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Natural kaolinite obtained from Share, Nigeria was treated with ammonium carbonate to enhance the adsorption capacity. The optimum operating conditions for the adsorption of metal ions on the natural clay (SK clay) were employed on the ammonium carbonate-treated clay (SK-AC clay). The adsorption data were analysed using adsorption isotherm and kinetic models. The statistical p-values were less than 0.05, indicating that the model terms are significant for the adsorption of the metal ions. The pseudo-second-order kinetic model best describes the metal ions adsorption mechanism. The activation e

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12

Booker, N. A., E. L. Cooney, and A. J. Priestley. "Ammonia removal from sewage using natural Australian zeolite." Water Science and Technology 34, no. 9 (1996): 17–24. http://dx.doi.org/10.2166/wst.1996.0167.

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A rapid adsorption process, which utilises the ammonium ion selectivity of a natural Australian zeolite, is being developed for removal of ammonia from sewage. The study reported in this paper claims not to have invented nor discovered this technique of ammonia removal from wastewater, but aims to realise the value of this natural Australian resource as an efficient alternative to existing treatment processes. An understanding of the equilibrium and kinetic behaviour of this material provided insight into its expected capacity as an adsorption media. Favourable results led to pilot scale trial

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13

Uchiyama, Kana, Hiromichi Asamoto, Hiroaki Minamisawa, and Kazunori Yamada. "Kinetic, Isothermal, and Thermodynamic Analyses of Adsorption of Humic Acid on Quaternized Porous Cellulose Beads." Macromol 4, no. 1 (2024): 117–34. http://dx.doi.org/10.3390/macromol4010006.

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Porous cellulose beads were quaternized with glycidyltrimethylammonium chloride (GTMAC), and the potential use of the quaternized cellulose beads as an adsorbent was explored for the removal of humic acid (HA) from aqueous media. The introduction of quaternary ammonium groups was verified by FT-IR and XPS analyses, and their content increased to 0.524 mmol/g-Qcell by increasing the GTMAC concentration. The adsorption capacity of the HA increased with decreasing initial pH value and/or increasing content of quaternary ammonium groups, and a maximum adsorption capacity of 575 mg/g-Qcell was obta

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14

M.F. Ledoh, Sherlly, Hermania Em Wogo, and Siti Arianti S.A. "LAJU ADSORPSI DAN DESORPSI PARAQUAT PADA TANAH PERTANIAN DESA OESAO KECAMATAN KUPANG TIMUR." Molekul 5, no. 1 (2010): 1. http://dx.doi.org/10.20884/1.jm.2010.5.1.70.

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The research about determination of kinetic adsorption and desorption rate of paraquat on agriculture area Oesao-east Kupang has been done. The aim of this research was to determine the kinetic of paraquat adsorption before and after saturated and to model the desorption. The research consisted of evaluation of the analitycal procedure for paraquat, pattern of soil kinetic adsorption and paraquat desorption. The result of procedure evaluation showed that reduced paraquat absorbed at λ maximum 606 nm and relative stability at 0-150 minutes. Constant of paraquat kinetic adsorption at natural sta

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15

He, Junguo, and Jie Xu. "The characteristics of heat-driven ammonium adsorption in aerobic granular sludge." Water Science and Technology 78, no. 7 (2018): 1466–75. http://dx.doi.org/10.2166/wst.2018.418.

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Abstract Adsorption is an important step during the migration of ammonium from the aqueous phase to biomass in biological nitrogen removal processes. A deeper understanding of the adsorption mechanisms is encouraged in constructing nitrogen conversion models. In this study, the ammonium adsorption in aerobic granular sludge was investigated at different conditions. Analysis of kinetic data indicated that ammonium adsorption was a fast process and followed pseudo-second-order kinetics (adsorption rate constant k2 was between 0.031 and 0.065 g/(mg · min)). The maximum adsorption capacity and hal

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16

Lv, Pengcheng, Ruihong Meng, Zhongyang Mao, and Min Deng. "Hydrothermal Synthesis of Sodalite-Type N-A-S-H from Fly Ash to Remove Ammonium and Phosphorus from Water." Materials 14, no. 11 (2021): 2741. http://dx.doi.org/10.3390/ma14112741.

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In this study, the hydrated sodium aluminosilicate material was synthesized by one-step hydrothermal alkaline desilication using fly ash (FA) as raw material. The synthesized materials were characterized by XRD, XRF, FT-IR and SEM. The characterization results showed that the alkali-soluble desilication successfully had synthesized the sodium aluminosilicate crystalline (N-A-S-H) phase of sodalite-type (SOD), and the modified material had good ionic affinity and adsorption capacity. In order to figure out the suitability of SOD as an adsorbent for the removal of ammonium and phosphorus from wa

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17

Phuong, Nguyen Van, Nguyen Khanh Hoang, Le Van Luan, and L. V. Tan. "Evaluation of NH 4 + Adsorption Capacity in Water of Coffee Husk-Derived Biochar at Different Pyrolysis Temperatures." International Journal of Agronomy 2021 (August 12, 2021): 1–9. http://dx.doi.org/10.1155/2021/1463814.

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Ammonium NH 4 + is a pollutant that can be harmful to the water environment. The purpose of this study is to access NH 4 + removal capacity from water by coffee husk-derived biochar. The properties of biochar prepared at different temperatures (300, 450, and 600°C) were determined including TOC, and pH , pH pzc , functional groups of H+/OH−, cation-exchange capacity (CEC), and the characteristics of groups of organic matter (FT-IR spectrum) were identified and evaluated. The trend of NH 4 + adsorption equilibrium and kinetics of biochar have been studied. The experimental design of adsorption

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18

Jayanthi, G., V. Andal, M. Prabaharan, and Suba Kannaiyan. "TMAB modified NiFe2O4 nanoparticles for the Effective removal of Eriochrome Black-T azo dye." Bulletin of the Chemical Society of Ethiopia 38, no. 6 (2024): 1569–81. http://dx.doi.org/10.4314/bcse.v38i6.6.

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The Eriochrome Black-T (EBT) azo dye was removed from aqueous solution using TMAB (tetramethyl ammonium bromide) stabilised NiFe2O4 (TMAB@NFO) nanoparticles, which have been synthesized through polymeric precursor method. X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectra (FTIR) were used to analyse the TMAB@NFO nanoparticles. Adsorption studies were conducted under a variety of conditions, including pH, adsorbent dosage, and contact time, intraparticle diffusion, pseudo-first- and pseudo-second-order kinetic models were used to analyse the kine

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19

Li, Changxin, Yuan Yu, Qingwu Zhang, Hong Zhong, and Shuai Wang. "Removal of Ammonium from Aqueous Solutions Using Zeolite Synthesized from Electrolytic Manganese Residue." International Journal of Chemical Engineering 2020 (September 14, 2020): 1–14. http://dx.doi.org/10.1155/2020/8818455.

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This paper carried out the study on removal of ammonium from aqueous solutions by zeolite derived from electrolytic manganese residue (EMR) via a fusion method. The variables of pH, contact time, EMRZ (EMR-based zeolite) dosage, initial ammonium concentration, and competitive cations and anions on the ammonium uptake capacity were systematically investigated in an attempt to illustrate adsorption performance of EMRZ. The results show that these influence factors had a remarkable impact on the ammonium uptake capacity of EMRZ. Maximum ammonium uptake capacity was achieved at pH value 8.0, EMRZ

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20

Pham, Minh Tien, Thi Kim Yen Truong, Thi Kim Tho Truong, Thanh Phu Le, Thi Bich Quyen Tran, and Huynh Vu Thanh Luong. "Activated carbon synthesis from durian peel for ammonium ion adsorption." CTU Journal of Innovation and Sustainable Development 17, no. 2 (2025): 91–100. https://doi.org/10.22144/ctujoisd.2025.038.

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In this study, activated carbon (AC) used as a high-efficiency and low-cost for ammonium ion (NH4+) adsorbent was synthesized, for the first time from durian peel by a one-step chemical activation process using phosphoric acid. The effects of pH, contact time, initial concentration, and adsorbent dose on the NH4+ adsorption in aqueous solution were investigated in detail. The as-synthesized AC was characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and Brunauer-Emmett-Teller method (BET)

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21

Abelta, Gita Aldira, Latif Al Qadri, Melany Febrina, et al. "Enhanced Ammonium Adsorption from Aqueous Solutions Using Ethylenediaminetetraacetic Acid (EDTA) Modified Lampung (Indonesia) Natural Zeolite: Isotherm, Kinetic, and Thermodynamic Studies." Science and Technology Indonesia 9, no. 2 (2024): 224–34. http://dx.doi.org/10.26554/sti.2024.9.2.224-234.

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The environmental concern related to excessive ammonium in water bodies necessitates efficient and cost-effective removal techniques. This study investigated the modification of natural zeolite collected from the Tanggamus district of Lampung Province, Indonesia, with ethylenediaminetetraacetic acid (EDTA) to enhance its performance for ammonium adsorption from aqueous solution. The modified and natural zeolites were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), N2 adsorption-desorption isotherm, and scanning electron microscopy (SEM). Results ind

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22

Biliani, Irene, and Ierotheos Zacharias. "Synthesis of a Novel Modified Zeolite (ZeoPhos) for the Adsorption of Ammonium and Orthophosphate Ions from Eutrophic Waters." Water 17, no. 6 (2025): 786. https://doi.org/10.3390/w17060786.

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Intensified human activities such as urbanization, agricultural production, industrialization, mining, and fish farming have led to high concentrations of nutrients in water bodies, resulting in eutrophication. Eutrophication has become a global problem that threatens water ecosystems globally. The present study examines the efficiency of applying a novel modified material as an adsorbent for phosphate and ammonium uptake from natural eutrophic freshwater, called ‘ZeoPhos’. The novel material consists of natural zeolite and the addition of iron, calcium, and humic ions, which have been reporte

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23

Biliani, Irene, Vasiliki Tsavatopoulou, and Ierotheos Zacharias. "Comparative Study of Ammonium and Orthophosphate Removal Efficiency with Natural and Modified Clay-Based Materials, for Sustainable Management of Eutrophic Water Bodies." Sustainability 16, no. 23 (2024): 10214. http://dx.doi.org/10.3390/su162310214.

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Eutrophication, a global threat that leads to degradation of freshwater and seawater aquatic ecosystems, is driven by excessive nutrient loading. This study explores the sustainable management of eutrophic water bodies with the application of natural and modified clay-based materials as a practical solution to mitigate eutrophication by removing ammonium and orthophosphate ions. Comparative analyses of six materials: natural zeolite, bentonite, and perlite, along with their modification with calcium and iron, were assessed after kinetic analysis of each material. Batch adsorption experiments w

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24

Yang, Tao, Xuansheng Hu, Peijuan Zhang, et al. "Study of pre-treatment of quinoline in aqueous solution using activated carbon made from low-cost agricultural waste (walnut shells) modified with ammonium persulfate." Water Science and Technology 79, no. 11 (2019): 2086–94. http://dx.doi.org/10.2166/wst.2019.206.

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Abstract Activated carbon made from agricultural waste (walnut shells) was investigated as a suitable adsorbent for effectively removing quinoline from industrial wastewater. The activated carbon was treated with phosphoric acid and oxidized by ammonium persulfate and its ability to adsorb pyridine and quinoline in aqueous solution was investigated. Kinetic parameters for the adsorption process were determined through pseudo-first-order and pseudo-second-order kinetic models and intraparticle diffusion models. Equilibrium experiments and adsorption isotherms were analyzed using Langmuir and Fr

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25

Zhong, Ling, Gang Xian Zhang, Feng Xiu Zhang, and Xu Ting Xue. "Adsorption Kinetic Study of Reactive Dyes on Silk with Octyl Trimethyl Ammonium Bromide as Accelerant." Advanced Materials Research 331 (September 2011): 291–97. http://dx.doi.org/10.4028/www.scientific.net/amr.331.291.

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The dyeing accelerating effect of octyl trimethyl ammonium bromide (OTAB) on dyeing silk with reactive red dye B-3BF, reactive yellow dye B-4RFN and reactive dark blue dye B-2GLN was studied in this paper. The dye-uptake rates increased with increasing concentration of OTAB, and the highest dye-uptake rates of three reactive dyes were 91~98%. The adsorption kinetics of dyeing process at different temperatures was also investigated by using pseudo first- and second-order kinetic models. The results showed that adsorption rates increased with increasing temperature. The adsorption kinetics of th

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26

Kamilia, Salwa, Feri Mukhayani, Sutarno Sutarno, and Nuryono Nuryono. "Modification of Chitosan-Coated Magnetic Material with Glycidyl-trimethylammonium Chloride for Cr(VI) Adsorption." Indonesian Journal of Chemistry 25, no. 1 (2025): 244. https://doi.org/10.22146/ijc.100749.

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Modification of chitosan-coated magnetic material with quaternary ammonium chloride as adsorbent for Cr(VI) anions has been studied. The works included magnetic material (MM) separation from iron sand, magnetic material-chitosan (MM/Chit) synthesis, and attachment of quaternary ammonium groups from glycidyl trimethyl ammonium chloride (GTMAC) on MM/Chit to produce MM/Chit/GTMAC with various mass ratios. Products were characterized with FTIR, XRD, SEM-EDX, and VSM. Adsorption studies were carried out in a batch system with pH, time, and initial Cr(VI) concentration variations. The unadsorbed Cr

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27

Tang, Hui, Xiaoyi Xu, Bin Wang, Chenpei Lv, and Dezhi Shi. "Removal of Ammonium from Swine Wastewater Using Synthesized Zeolite from Fly Ash." Sustainability 12, no. 8 (2020): 3423. http://dx.doi.org/10.3390/su12083423.

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Synthetic zeolites with pretreated fly ash as a raw material were used to remove ammonium from wastewater using a hydrothermal method in this study. Two pretreatment methods of fly ash were used to compare the ammonium removal of zeolites: water-washing and pickling. In addition, the effects of several factors including the time, temperature, pH, adsorbent dosage, coexisting ions and initial concentration were investigated to gain insight into the adsorption rate, behavior and mechanism of synthetic zeolites for ammonium. N2 adsorption/desorption isotherms showed that the synthetic zeolite was

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28

Sekewael, Serly J., Hellna Tehubijuluw, and Delvika R. Reawaruw. "Kinetic Study And Isoterm Adsorption Of Pb Metal In Ouw Village Clay Activated Ammonium Nitrate Salt." Indonesian Journal of Chemical Research 1, no. 1 (2017): 38–46. http://dx.doi.org/10.30598/ijcr.2013.1-ser.

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Kinetics studies and adsorption isotherms of Pb metal have been conducted on activated clay salts of ammonium nitrate (NH4NO3). Clays used are taken from Ouw village, Central Maluku. Clay activated by soaking in a solution of NH4NO3 700 ppm for 5 hours, then filtering and heating in a furnace at 550 oC for 4 hours. The optimum adsorption of metal ions Pb (II) by activated clay ammonium nitrate occurs at pH 4 with a contact time of 4 hours and followed the Freundlich adsorption isotherm pattern with a Kf value of 1.6193 x 10-8 mg/g and n value of 0.2059. Pb adsorption kinetics followed the pseu

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Abed, Thaaer Hameed, Daniela Simina Stefan, Daniela Cristina Berger, Nicolaie Cicerone Marinescu, and Mircea Stefan. "Performance Evaluation of a Romanian Zeolite: A Sustainable Material for Removing Ammonium Ions from Water." Sustainability 16, no. 18 (2024): 7888. http://dx.doi.org/10.3390/su16187888.

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Ammonium ion is a chemical species that is found in abundance in natural waters, whether underground or surface, but also in wastewater resulting from agricultural and industrial activities. Even if the removal of the ammonium ion from water has been studied for a very long time, it has been found that its removal is far from being solved. In this study, we evaluated the performance of the ammonium ion adsorption process on two adsorbents, zeolite clinoptilolite, ZR, a sustainable material (manufacturer: Zeolite Development SRL, Rupea, Brasov, Romania), and the other granular activated carbon

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30

Han, Jian Gang, Gang Zhao, Long Shuai Dou, Yu Jing Jing, and Yong Li Zhu. "Adsorption of Ammonium Nitrogen in Water by Rice Husk Charcoal: A Simulation Study." Advanced Materials Research 781-784 (September 2013): 2063–66. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2063.

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Rice husk charcoal, a kind of new environmentally friendly biomass materials, which is made from rice husk under anaerobic combustion at 300°C, has been increasingly applied to remedy some polluted sites. Rice husk charcoal was employed to investigate adsorption of ammonium in simulated waste water, using once balance method. It is found that ammonium nitrogen in water can be rapidly adsorbed by rice husk charcoal in 2 min with maximum sorption capacity of 2.6 mg/g (Langmuir isotherm adsorption model). The n value of 1.2 in Freundlich isotherm model indicates that the absorbent is very suitabl

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31

Sun, Yan Li, Jian Wei Lin, Hong Huang, Wei Ying Zhang, and Dan Dan Ma. "Simultaneous Removal of Ammonium and Phosphate from Aqueous Solution by Calcium Chloride-Modified Zeolite." Advanced Materials Research 356-360 (October 2011): 1581–85. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.1581.

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Abstract. In this study, the simultaneous adsorption characteristics of ammonium and phosphate from aqueous solution by calcium chloride-modified zeolite were investigated. Results showed that the adsorption kinetic data of ammonium and phosphate onto the calcium chloride-modified zeolite could be well described by a pseudo-second-order model. The adsorption equilibrium data of ammonium onto the calcium chloride-modified zeolite fitted to the Langmuir isotherm model better than the Freundlich and Dubinin-Radushkevich isotherm models. The phosphate removal efficiency of calcium chloride-modifie

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32

Lu, Caimei, Hanbing Zhang, Rui Tang, Sishan Yu, and Zehua Li. "Adsorption of Tetracycline by Ammonium Molybdate Modified Chinese Fir Biochars." E3S Web of Conferences 350 (2022): 03008. http://dx.doi.org/10.1051/e3sconf/202235003008.

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Tetracycline (TC) adsorption amount on original wood biochar was finitely, so modification is imperative to improve its adsorption capacity. This study mixed chinese fir sawdust with ammonium molybdate to prepare a modified chinese fir biochar (MCB) via pyrolysis at 800 °C. Meanwhile, pristine chinese fir biochar (CB) was produced as control. The effects of pH, adsorption time, initial concentration and adsorbent dosage on the adsorption process were also studied. Langmuir model and quasi second-order kinetic model were used describe the characteristics of adsorption process. The optimally cap

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33

Korotkova, G. T., A. M. Zakolyukina, and S. A. Bushumov. "Application of kinetic models to study the sorption rate in the ‘ammonium ions–calcined sorbent’ system." Proceedings of Universities. Applied Chemistry and Biotechnology 14, no. 1 (2024): 6–18. http://dx.doi.org/10.21285/achb.894.

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This study examines sorption kinetics for the extraction of ammonium ions from an aqueous solution under static conditions using 5 g of sorbent. The sorbent was obtained by calcining ash and slag waste accumulated in the ash dump following hydraulic ash removal. The initial concentrations of ammonium ions in the model solutions were 5, 20, 50 and 100 mg/dm3. The volume of the model solution was 50 cm3. For each initial concentration, the kinetic curves of the ammonium ion sorption at the sorption duration of 10, 30, 60, 90, 120, 150 and 180 min were obtained. The kinetic curves were processed

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Ghising, Ram, and Vinaya Jha. "Characteristics of the ammonium ion adsorption from wastewater by the activated carbon obtained from waste tire." Journal of Nepal Chemical Society 43, no. 1 (2022): 16–26. http://dx.doi.org/10.3126/jncs.v43i1.46998.

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The activated carbons were prepared from waste tire using a pyrolysis technique in different environments, namely: activated carbon in the open air (AC-O), nitrogen gas (AC-N), nitrogen gas and water steam (AC-NW), and a composite of tire and aluminum hydroxide in nitrogen and steam atmosphere (AC-COM), in order to study the change in specific surface area and making the composite of activated carbon and alumina. The X-ray diffraction study revealed the presence of quartz, alumina, zinc sulfide, and activated carbon. Methylene blue adsorption isotherm showed that the highest specific surface a

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Liu, Xiaohong, Fang Wang, and Song Bai. "Kinetics and equilibrium adsorption study of p-nitrophenol onto activated carbon derived from walnut peel." Water Science and Technology 72, no. 12 (2015): 2229–35. http://dx.doi.org/10.2166/wst.2015.453.

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An original activated carbon prepared from walnut peel, which was activated by zinc chloride, was modified with ammonium hydroxide or sodium hydroxide in order to contrast the adsorption property of the three different activated carbons. The experiment used a static adsorption test for p-nitrophenol. The effects of parameters such as initial concentration, contact time and pH value on amount adsorbed and removal are discussed in depth. The thermodynamic data of adsorption were analyzed by Freundlich and Langmuir models. The kinetic data of adsorption were measured by the pseudo-first-order kin

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Wang, Liangkai, Ningyuan Zhu, Hiba Shaghaleh, et al. "The Effect of Functional Ceramsite in a Moving Bed Biofilm Reactor and Its Ammonium Nitrogen Adsorption Mechanism." Water 15, no. 7 (2023): 1362. http://dx.doi.org/10.3390/w15071362.

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For aquaculture wastewater with low ammonium nitrogen concentration, combining the carrier adsorption and biological nitrogen removal processes can maximize their respective advantages. Functional ceramsite that has excellent ammonium nitrogen adsorption performance and excellent biocompatibility was the key to the moving bed biofilm reactor (MBBR) adsorption—shortcut simultaneous nitrification and denitrification (shortcut SND) process. Our group prepared a high-strength lightweight ceramsite that met those requirements. In this study, we applied functional ceramsite in MBBR to cope with low-

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Lian, J. J., Y. G. Huang, B. Chen, et al. "Removal of molybdenum(VI) from aqueous solutions using nano zero-valent iron supported on biochar enhanced by cetyl-trimethyl ammonium bromide: adsorption kinetic, isotherm and mechanism studies." Water Science and Technology 2017, no. 3 (2018): 859–68. http://dx.doi.org/10.2166/wst.2018.258.

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Abstract A new carbonized pomelo peel biosorbent (MCPP) modified with nanoscale zero-valent iron (NZVI) and cetyl-trimethyl ammonium bromide was prepared and employed for the adsorption of molybdate (Mo(VI)) from aqueous solution. We investigated the effects of various conditions on Mo(VI) adsorption and evaluated the results based on adsorption kinetics models and isotherm equations. The kinetic data fitted to the pseudo-second-order model. The Langmuir model best described the adsorption of Mo(VI) on MCPP. The values of changes in Gibbs free energy, standard enthalpy, and standard entropy re

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Muscarella, Sofia Maria, Vito Armando Laudicina, Trapani Daniele Di, and Giorgio Mannina. "Recovering ammonium from real treated wastewater by zeolite packed columns: The effect of flow rate and particle diameter." Sustainable Chemistry and Pharmacy 41 (June 21, 2024): 101659. https://doi.org/10.1016/j.scp.2024.101659.

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Nitrogen (N) recovery from wastewater is a desirable way to create a (N) neutral society in view of a circular economy approach. Nitrogen recovery from wastewater by employing adsorption columns filled with zeolite can be a very attractive solution. This study assessed the effect of influent flow rates (namely, 1.6 and 2.3 L h−1) and particle diameters (namely, 0.5–1.0 and 2.0–5.0 mm) of zeolite packed in columns on recovering NH4+ from real domestic treated wastewater (RDTWW). Findings revealed that maximum NH4+ recovery can be achieved by using zeolite with the smallest par

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Yin, Qianqian, Mengtian Liu, and Huaipu Ren. "Removal of ammonium and phosphate from water by Mg-modified biochar: Influence of Mg pretreatment and pyrolysis temperature." BioResources 14, no. 3 (2019): 6203–18. http://dx.doi.org/10.15376/biores.14.3.6203-6218.

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Poplar chips before and after a magnesium (Mg) pretreatment were pyrolyzed under different temperatures to obtain pristine and Mg-modified biochar samples (i.e., 300/BC, 450/BC, 600/BC, 300Mg/BC, 450Mg/BC, and 600Mg/BC). The biochars were used to evaluate how pyrolysis temperature and Mg modification influenced their capacity to adsorb ammonium and phosphate from eutrophic waters. An increased temperature caused an increase in carbonization degree, a more developed porous structure, and a decrease in the functional groups on biochar. The Mg modification was helpful for the development of a por

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Zhao, Cui, Zhongyuan Zheng, Jing Zhang, Donghui Wen, and Xiaoyan Tang. "Adsorption characteristics of ammonium exchange by zeolite and the optimal application in the tertiary treatment of coking wastewater using response surface methodology." Water Science and Technology 67, no. 3 (2013): 619–27. http://dx.doi.org/10.2166/wst.2012.606.

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Natural zeolite is a favorable NH4+-ion exchanger in the tertiary wastewater treatment. In this study, a natural Chinese zeolite was anatomized using the mercury injection method, X-ray diffraction, and scanning electron micrographs. The kinetic process of ammonium adsorption onto the zeolite was best described by the pseudo second order model; the adsorption equilibrium data fitted better to the Freundlich isotherm; and the exchange between ammonium and alkali/alkaline earth cations was in the order of Na+ &gt; Ca2+ &gt; K+ &gt; Mg2+. Finally, the zeolite powder was applied for th

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Hodúr, Cecilia, Naoufal Bellahsen, Edit Mikó, Virág Nagypál, Zita Šereš, and Szabolcs Kertész. "The Adsorption of Ammonium Nitrogen from Milking Parlor Wastewater Using Pomegranate Peel Powder for Sustainable Water, Resources, and Waste Management." Sustainability 12, no. 12 (2020): 4880. http://dx.doi.org/10.3390/su12124880.

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Agricultural wastewater poses serious risks to the environment due to how it is injudiciously used and managed. We investigated the use of pomegranate peel powder (PPP) to adsorb ammonium ions from milking parlor wastewater, which is applied as a nitrogen source for cropland fertilization despite its environmental ramifications. As a valueless by-product of juice and jam industries, PPP shows promising features and characteristics as a potential bio-adsorbent for ammonium nitrogen removal and recovery. The surface characterization of PPP was performed by zeta potential measurement and attenuat

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Kurniawan, Teguh, Saiful Bahri, Anita Diyanah, et al. "Improving Ammonium Sorption of Bayah Natural Zeolites by Hydrothermal Method." Processes 8, no. 12 (2020): 1569. http://dx.doi.org/10.3390/pr8121569.

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Natural zeolites are easily found and abundant in Indonesia. The natural zeolites are low-cost minerals; however, their ammonium sorption is poor. A hydrothermal method was applied to improve the ammonium sorption. Hydrothermal treatment times were varied 8, 24, and 32 h. The parent and hydrothermal treated samples were characterized by using X-ray diffraction (XRD), Field Emission Scanning Electron Microscopes (FE-SEM), Fourier-transform infrared spectroscopy (FTIR), and nitrogen physisorption. Ammonium adsorption was performed using a batch reactor to evaluate the adsorption performance of t

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Muscarella, Sofia Maria, Luigi Badalucco, Beatriz Cano, Vito Armando Laudicina, and Giorgio Mannina. "Ammonium adsorption, desorption and recovery by acid and alkaline treated zeolite." Bioresource Technology 341 (August 24, 2024): 125812. https://doi.org/10.1016/j.biortech.2021.125812.

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In this study, the suitability of zeolite as a possible medium for ammonium adsorption, desorption and recovery from wastewater was investigated. Specifically, batch adsorption and desorption studies with solutions enriched in NH4+ were conducted employing zeolite to evaluate how the chemical treatment and contact time affect adsorption and desorption. Several experimental tests were carried out considering both untreated and treated zeolite. Untreated and HCl-Na treated zeolite adsorbed up to 11.8 mg NH4+ g-1 and showed the highest efficiency in recovering NH4+ from aqueous solution. Regardle

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Papaevangelou, Vassiliki, Katerina A. Bakalakou, John Tsilinikos, and Christos S. Akratos. "Testing Zeolite and Palygorskite as a Potential Medium for Ammonium Recovery and Brewery Wastewater Treatment." Water 15, no. 23 (2023): 4069. http://dx.doi.org/10.3390/w15234069.

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Environmental pollution is an issue of particular concern, specifically when industrial waste products are not subjected to appropriate treatment. Among various industries in the agri-food sector, the brewing industry holds a significant position in this context, given that beer stands as the predominant choice of consumers. Brewery waste generates significant quantities of organic substances, along with ammonium nitrogen and phosphorus. Among the various methods for their treatment, adsorption has received substantial attention due to its cost-effectiveness and operational simplicity. The pre

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Zhang, Quanguo, Zexian Liu, Francesco Petracchini, et al. "Preparation of Slow-Release Insecticides from Biogas Slurry: Effectiveness of Ion Exchange Resin in the Adsorption and Release of Ammonia Nitrogen." Processes 9, no. 8 (2021): 1461. http://dx.doi.org/10.3390/pr9081461.

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The insecticidal ingredient in a biogas solution being fully utilized by cation exchange resin to produce slow-release insecticide is of great social value. In this work, the feasibility of ammonia nitrogen in a biogas slurry loaded on resin as a slow-release insecticide was evaluated by studying the effect of adsorption and the slow release of ammonia nitrogen by resin. The effects of the ammonia nitrogen concentration, resin dosage, adsorption time and pH value on the ammonia nitrogen adsorption by the resin were studied. The results showed that the ion exchange resin had a good adsorption e

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Liu, Haining, Yanping Wang, Qiongyuan Zhang, Wenjie Han, Huifang Zhang, and Xiushen Ye. "High-Efficiency Selective Adsorption of Rubidium and Cesium from Simulated Brine Using a Magnesium Ammonium Phosphate Adsorbent." Separations 11, no. 9 (2024): 277. http://dx.doi.org/10.3390/separations11090277.

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Rubidium and cesium are critical strategic elements, and their development and utilization are of great significance. In this study, a magnesium ammonium phosphate (MAP) adsorbent was prepared and characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area analysis, and Fourier transform infrared spectroscopy (FTIR). The adsorption performance of the adsorbent for Rb+ and Cs+ in solution was investigated. The results showed that the adsorbent exhibited high adsorption capacities of 2.83 mol/g for Rb+ and 4.37 mol/g for Cs+. In simu

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Lawal, J. A., E. O. Odebunmi, and F. A. Adekola. "Adsorption of Fe , Pb , Zn and Cr ions from aqueous solutions using natural, ammonium oxalate and sodium hydroxide modified Kaolinite clay." Ife Journal of Science 22, no. 3 (2021): 1–23. http://dx.doi.org/10.4314/ijs.v22i3.1.

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In this paper, Fe2+ , Pb2+ , Zn2+ and Cr6+ ions removal from contaminated water with natural Nigerian kaolinite clay (AK-clay), and that removed with kaolinite clay modified with either ammonium oxalate (AK-AO) or sodium hydroxide (AK-S) were presented. The clay was characterized using X-Ray Diffractometry (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Brunanuer-EmmettTeller (BET) method. The parameters investigated include pH, adsorbent particle size, shaking speed, metal ion concentration and temperature. The optimum conditions were applied to t

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Xu, Yuan Dong, and Xiang Yang Yan. "Adsorption of Cr(VI) onto the Cross-Linked Cationic Starch and the Establishment of the Adsorption Isotherm and Kinetic Equation." Advanced Materials Research 518-523 (May 2012): 285–88. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.285.

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Glycidyl trimethyl ammonium chloride (GTA) has been synthesized and used as cross-linked cationic reagent to prepare modified starch. The adsorption behavior of Cr(VI) onto the cross-linked cationic starch was studied systematically. The adsorption time and the temperature took great effects on the adsorption performance of the adsorbent. After a suitable time the adsorption could reach an equilibrium state and the adsorption capacity increased with the decrease of the temperature. The adsorption isotherm and the kinetic equation were established and they fit well with the Freundlich and Lager

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Khan, Muhammad Saad, Cornelius Borecho Bavoh, Khor Siak Foo, et al. "Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates." Molecules 26, no. 2 (2021): 275. http://dx.doi.org/10.3390/molecules26020275.

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This study evaluates the kinetic hydrate inhibition (KHI) performance of four quaternary ammonium hydroxides (QAH) on mixed CH4 + CO2 hydrate systems. The studied QAHs are; tetraethylammonium hydroxide (TEAOH), tetrabutylammonium hydroxide (TBAOH), tetramethylammonium hydroxide (TMAOH), and tetrapropylammonium hydroxide (TPrAOH). The test was performed in a high-pressure hydrate reactor at temperatures of 274.0 K and 277.0 K, and a concentration of 1 wt.% using the isochoric cooling method. The kinetics results suggest that all the QAHs potentially delayed mixed CH4 + CO2 hydrates formation du

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Khan, Muhammad Saad, Cornelius Borecho Bavoh, Khor Siak Foo, et al. "Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates." Molecules 26, no. 2 (2021): 275. http://dx.doi.org/10.3390/molecules26020275.

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This study evaluates the kinetic hydrate inhibition (KHI) performance of four quaternary ammonium hydroxides (QAH) on mixed CH4 + CO2 hydrate systems. The studied QAHs are; tetraethylammonium hydroxide (TEAOH), tetrabutylammonium hydroxide (TBAOH), tetramethylammonium hydroxide (TMAOH), and tetrapropylammonium hydroxide (TPrAOH). The test was performed in a high-pressure hydrate reactor at temperatures of 274.0 K and 277.0 K, and a concentration of 1 wt.% using the isochoric cooling method. The kinetics results suggest that all the QAHs potentially delayed mixed CH4 + CO2 hydrates formation du

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