Advanced search
1 file | 804.54 KB Add to list

Recirculating water treatment in closed hydroponic systems : assessment of granular activated carbon and soft templated Mesoporous carbon for adsorptive removal of root exudates

Author
Organization
Abstract
The present study deals with the characterization of reused nutrient solution (RNS) from a hydroponic farm (lettuce). Chemical analysis with GC-MS revealed the presence of eleven individual organic acids as a part of root exudates (acetic, acrylic, maleic, succinic, benzoic, phthalic, sebacic, myristic, palmitic, oleic and stearic acid). Based on these results, first batch tests were developed to determine the breakthrough time and the best kinetic model for adsorption of benzoic acid (as an indicator of these 11 organic acids) on two different types of carbon based adsorbents (granular activated carbon-GAC and soft templated mesoporous carbon-SMC). In order to evaluate the adsorption kinetics, four different kinetic models were fit to the experimental data. The pseudo-second-order best represented the experimental data for both adsorbents at all dosages, exhibiting high linear correlation coefficients (R(2)0.98). Second, to gain a better understanding of the adsorption efficiency during the batch experiments, several parameters were measured (i.e., COD, UV254, pH and EC) and the effect of adsorbent dosages on these parameters was studied. Third, the effect of different flow rates and bed heights on the breakthrough curve was studied during column tests. These curves were fitted to four well-known fixed-bed adsorption models, namely Thomas, Bohart-Adams, Yoon-Nelson and BDST models. The latter model was found to be most suitable (R(2)0.88) to predict the breakthrough curve for benzoic acid uptake on GAC in fixed bed column. Scale up analysis revealed that approximately 72kg GAC is required to treat RNS during 27days for a typical flow rate of 360Lh(-1) (3200kgL(-1)).
Keywords
Closed hydroponics, Root exudates, Water treatment, Sustainability, Granular activated carbon (GAC), Soft templated mesoporous carbon (SMC), FIXED-BED COLUMN, NUTRIENT SOLUTION, ENHANCED ADSORPTION, ION-EXCHANGE, AUTOTOXICITY, LETTUCE, CULTURE, SUBSTANCES, OZONATION, KINETICS

Downloads

  • (...).pdf
    • full text (Published version)
    • |
    • UGent only
    • |
    • PDF
    • |
    • 804.54 KB

Citation

Please use this url to cite or link to this publication:

MLA
Hosseinzadeh, Seyedahmad, et al. “Recirculating Water Treatment in Closed Hydroponic Systems : Assessment of Granular Activated Carbon and Soft Templated Mesoporous Carbon for Adsorptive Removal of Root Exudates.” ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL, vol. 6, no. 1, 2019, pp. 1–23, doi:10.1007/s40710-019-00347-0.
APA
Hosseinzadeh, S., Liu, Z., De Graeve, J., Bkheet, M., Libbrecht, W., De Clercq, J., & Van Hulle, S. (2019). Recirculating water treatment in closed hydroponic systems : assessment of granular activated carbon and soft templated Mesoporous carbon for adsorptive removal of root exudates. ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL, 6(1), 1–23. https://doi.org/10.1007/s40710-019-00347-0
Chicago author-date
Hosseinzadeh, Seyedahmad, Ze Liu, Jasmien De Graeve, Mona Bkheet, Wannes Libbrecht, Jeriffa De Clercq, and Stijn Van Hulle. 2019. “Recirculating Water Treatment in Closed Hydroponic Systems : Assessment of Granular Activated Carbon and Soft Templated Mesoporous Carbon for Adsorptive Removal of Root Exudates.” ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL 6 (1): 1–23. https://doi.org/10.1007/s40710-019-00347-0.
Chicago author-date (all authors)
Hosseinzadeh, Seyedahmad, Ze Liu, Jasmien De Graeve, Mona Bkheet, Wannes Libbrecht, Jeriffa De Clercq, and Stijn Van Hulle. 2019. “Recirculating Water Treatment in Closed Hydroponic Systems : Assessment of Granular Activated Carbon and Soft Templated Mesoporous Carbon for Adsorptive Removal of Root Exudates.” ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL 6 (1): 1–23. doi:10.1007/s40710-019-00347-0.
Vancouver
1.
Hosseinzadeh S, Liu Z, De Graeve J, Bkheet M, Libbrecht W, De Clercq J, et al. Recirculating water treatment in closed hydroponic systems : assessment of granular activated carbon and soft templated Mesoporous carbon for adsorptive removal of root exudates. ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL. 2019;6(1):1–23.
IEEE
[1]
S. Hosseinzadeh et al., “Recirculating water treatment in closed hydroponic systems : assessment of granular activated carbon and soft templated Mesoporous carbon for adsorptive removal of root exudates,” ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL, vol. 6, no. 1, pp. 1–23, 2019.
@article{8615874,
  abstract     = {The present study deals with the characterization of reused nutrient solution (RNS) from a hydroponic farm (lettuce). Chemical analysis with GC-MS revealed the presence of eleven individual organic acids as a part of root exudates (acetic, acrylic, maleic, succinic, benzoic, phthalic, sebacic, myristic, palmitic, oleic and stearic acid). Based on these results, first batch tests were developed to determine the breakthrough time and the best kinetic model for adsorption of benzoic acid (as an indicator of these 11 organic acids) on two different types of carbon based adsorbents (granular activated carbon-GAC and soft templated mesoporous carbon-SMC). In order to evaluate the adsorption kinetics, four different kinetic models were fit to the experimental data. The pseudo-second-order best represented the experimental data for both adsorbents at all dosages, exhibiting high linear correlation coefficients (R(2)0.98). Second, to gain a better understanding of the adsorption efficiency during the batch experiments, several parameters were measured (i.e., COD, UV254, pH and EC) and the effect of adsorbent dosages on these parameters was studied. Third, the effect of different flow rates and bed heights on the breakthrough curve was studied during column tests. These curves were fitted to four well-known fixed-bed adsorption models, namely Thomas, Bohart-Adams, Yoon-Nelson and BDST models. The latter model was found to be most suitable (R(2)0.88) to predict the breakthrough curve for benzoic acid uptake on GAC in fixed bed column. Scale up analysis revealed that approximately 72kg GAC is required to treat RNS during 27days for a typical flow rate of 360Lh(-1) (3200kgL(-1)).},
  author       = {Hosseinzadeh, Seyedahmad and Liu, Ze and De Graeve, Jasmien and Bkheet, Mona and Libbrecht, Wannes and De Clercq, Jeriffa and Van Hulle, Stijn},
  issn         = {2198-7491},
  journal      = {ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL},
  keywords     = {Closed hydroponics,Root exudates,Water treatment,Sustainability,Granular activated carbon (GAC),Soft templated mesoporous carbon (SMC),FIXED-BED COLUMN,NUTRIENT SOLUTION,ENHANCED ADSORPTION,ION-EXCHANGE,AUTOTOXICITY,LETTUCE,CULTURE,SUBSTANCES,OZONATION,KINETICS},
  language     = {eng},
  number       = {1},
  pages        = {1--23},
  title        = {Recirculating water treatment in closed hydroponic systems : assessment of granular activated carbon and soft templated Mesoporous carbon for adsorptive removal of root exudates},
  url          = {http://dx.doi.org/10.1007/s40710-019-00347-0},
  volume       = {6},
  year         = {2019},
}

Altmetric
View in Altmetric