Comparative study of efficiency between 2,4 dinitrophenol removal using dry sludge and modified calcium chloride
Background and Objective: 2,4 dinitrophenol is observed in sewage produced from chemical and petrochemical industries. Contamination of drinking water with these pollutants causes toxicity, health problems and change in taste and odor. The present study was developed to evaluate the efficiency of re...
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| Format: | Article |
| Language: | fas |
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Tehran University of Medical Sciences
2020-02-01
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| Series: | سلامت و محیط |
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| Online Access: | http://ijhe.tums.ac.ir/article-1-6305-en.html |
| _version_ | 1819103686529384448 |
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| author | H Niknejad M Farzadkia A Esrafili M Kermani |
| author_facet | H Niknejad M Farzadkia A Esrafili M Kermani |
| author_sort | H Niknejad |
| collection | DOAJ |
| description | Background and Objective: 2,4 dinitrophenol is observed in sewage produced from chemical and petrochemical industries. Contamination of drinking water with these pollutants causes toxicity, health problems and change in taste and odor. The present study was developed to evaluate the efficiency of removal 2,4-DNP through dried sludge adsorbent and modified calcium chloride sludge adsorbent.
Materials and Methods: At first, sludge was dried at temperature of 60 °C. Next, CaCl2 was used to improve adsorption capacity. The removal efficiency of 2,4 dinitrophenol were determined by HPLC at wavelength of 360 nm. The effects of influencing factors including pH, initial pollutant concentration, contact time, and adsorbent dose were examined.
Results: The optimum pH of adsorption for both adsorbents was found to be 7. The optimum concentration of 2,4-DNP was 10 ppm. The results obtained from the present research showed that the removal of the contaminant using dried and modified sludge sorbent was increased from 72.6% to 86% at a dosage of 1.5 g. The adsorption kinetics were fitted with the pseudo second order kinetics model for both adsorbents. The isotherm data also showed that the adsorption of this pollutant on both adsorbents is fitted with the Freundlich model.
Conclusion: Results obtained from the present study indicated that the efficiency of the modified sludge ash is more than the non-modified sludge in 2,4 dinitrophenol removal. This can reduce adsorbent consumption in industrial treatment plants. |
| first_indexed | 2024-12-22T01:54:24Z |
| format | Article |
| id | doaj.art-4a3ed881c5794002a682ea0c66ed57df |
| institution | Directory Open Access Journal |
| issn | 2008-2029 2008-3718 |
| language | fas |
| last_indexed | 2024-12-22T01:54:24Z |
| publishDate | 2020-02-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | سلامت و محیط |
| spelling | doaj.art-4a3ed881c5794002a682ea0c66ed57df2022-12-21T18:42:49ZfasTehran University of Medical Sciencesسلامت و محیط2008-20292008-37182020-02-01124695708Comparative study of efficiency between 2,4 dinitrophenol removal using dry sludge and modified calcium chlorideH Niknejad0M Farzadkia1A Esrafili2M Kermani3 Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran Background and Objective: 2,4 dinitrophenol is observed in sewage produced from chemical and petrochemical industries. Contamination of drinking water with these pollutants causes toxicity, health problems and change in taste and odor. The present study was developed to evaluate the efficiency of removal 2,4-DNP through dried sludge adsorbent and modified calcium chloride sludge adsorbent. Materials and Methods: At first, sludge was dried at temperature of 60 °C. Next, CaCl2 was used to improve adsorption capacity. The removal efficiency of 2,4 dinitrophenol were determined by HPLC at wavelength of 360 nm. The effects of influencing factors including pH, initial pollutant concentration, contact time, and adsorbent dose were examined. Results: The optimum pH of adsorption for both adsorbents was found to be 7. The optimum concentration of 2,4-DNP was 10 ppm. The results obtained from the present research showed that the removal of the contaminant using dried and modified sludge sorbent was increased from 72.6% to 86% at a dosage of 1.5 g. The adsorption kinetics were fitted with the pseudo second order kinetics model for both adsorbents. The isotherm data also showed that the adsorption of this pollutant on both adsorbents is fitted with the Freundlich model. Conclusion: Results obtained from the present study indicated that the efficiency of the modified sludge ash is more than the non-modified sludge in 2,4 dinitrophenol removal. This can reduce adsorbent consumption in industrial treatment plants.http://ijhe.tums.ac.ir/article-1-6305-en.htmlabsorptiondry sludge24 denitrofenoladsorption isotherms |
| spellingShingle | H Niknejad M Farzadkia A Esrafili M Kermani Comparative study of efficiency between 2,4 dinitrophenol removal using dry sludge and modified calcium chloride سلامت و محیط absorption dry sludge 2 4 denitrofenol adsorption isotherms |
| title | Comparative study of efficiency between 2,4 dinitrophenol removal using dry sludge and modified calcium chloride |
| title_full | Comparative study of efficiency between 2,4 dinitrophenol removal using dry sludge and modified calcium chloride |
| title_fullStr | Comparative study of efficiency between 2,4 dinitrophenol removal using dry sludge and modified calcium chloride |
| title_full_unstemmed | Comparative study of efficiency between 2,4 dinitrophenol removal using dry sludge and modified calcium chloride |
| title_short | Comparative study of efficiency between 2,4 dinitrophenol removal using dry sludge and modified calcium chloride |
| title_sort | comparative study of efficiency between 2 4 dinitrophenol removal using dry sludge and modified calcium chloride |
| topic | absorption dry sludge 2 4 denitrofenol adsorption isotherms |
| url | http://ijhe.tums.ac.ir/article-1-6305-en.html |
| work_keys_str_mv | AT hniknejad comparativestudyofefficiencybetween24dinitrophenolremovalusingdrysludgeandmodifiedcalciumchloride AT mfarzadkia comparativestudyofefficiencybetween24dinitrophenolremovalusingdrysludgeandmodifiedcalciumchloride AT aesrafili comparativestudyofefficiencybetween24dinitrophenolremovalusingdrysludgeandmodifiedcalciumchloride AT mkermani comparativestudyofefficiencybetween24dinitrophenolremovalusingdrysludgeandmodifiedcalciumchloride |