Volume 12, Issue 1 (5-2019)
ijhe 2019, 12(1): 129-140 |
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Hoshyari E, Hassanzadeh N, Charkhestani A. Ecological and health risk assessment of linear alkylbenzene sulfonates in Doroodzan Dam (Fars). ijhe 2019; 12 (1) :129-140
URL: http://ijhe.tums.ac.ir/article-1-6157-en.html
URL: http://ijhe.tums.ac.ir/article-1-6157-en.html
1- Department of Environmental Science, Faculty of Natural Resources and Environments, Malayer University, Malayer, Iran
2- Department of Environmental Science, Faculty of Natural Resources and Environments, Malayer University, Malayer, Iran ,nasrinhassanzadeh@gmail.com
3- Department of Environmental Science, Faculty of Civil Engineering, Nowshirvan University of Technology, Babol, Iran
2- Department of Environmental Science, Faculty of Natural Resources and Environments, Malayer University, Malayer, Iran ,
3- Department of Environmental Science, Faculty of Civil Engineering, Nowshirvan University of Technology, Babol, Iran
Abstract: (15584 Views)
Background and Objective: Nowadays linear alkyl benzene sulfanate (LAS) is widely used in the production of various detergents. The purpose of this study was to assess the health and ecological hazards of this pollutant on target organisms such as fish and daphnia in the Doroodzan Dam water.
Materials and Methods: According to the research objective and given existing restrictions, 21 water samples were collected in September 2018 from 7 selected stations based on the source of contamination in Doroodzan dam. Water quality parameters including pH, Dissolved Oxygen (DO), potential Redox (ORP), Total dissolve solid (TDS) and Electrical conductivity (EC) was measured at the site. The amount of linear alkyl benzenesulfonate (LAS) was measured using an optimized methylene blue method after transferring samples to the lab. Then ecological and health risk assessment was performed by calculating the RQ index (risk index).
Results: The results showed that the mean of pH, EC, TDS, salinity and DO were 8.88, 732.19 µs/cm, 482.49, 366.16 and 6.87 mg/L, respectively. The highest and lowest concentrations of LAS were 0.039 and 0.055 mg/L, respectively. The results also showed that there is a significant relationship between LAS concentration and pH. The results of the risk assessment showed that the health risk index in all stations is less than 0.1, while the ecological risk index except at station 7, are in low risk level.
Conclusion: In general, the results show that the RQ index in the Droodzan Dam water is in appropriate range and in the low risk level. Therefore, it is necessary to conduct long-term studies in this field to ensure the persistence of optimal water conditions in the dam ecologically and health-wise.
Materials and Methods: According to the research objective and given existing restrictions, 21 water samples were collected in September 2018 from 7 selected stations based on the source of contamination in Doroodzan dam. Water quality parameters including pH, Dissolved Oxygen (DO), potential Redox (ORP), Total dissolve solid (TDS) and Electrical conductivity (EC) was measured at the site. The amount of linear alkyl benzenesulfonate (LAS) was measured using an optimized methylene blue method after transferring samples to the lab. Then ecological and health risk assessment was performed by calculating the RQ index (risk index).
Results: The results showed that the mean of pH, EC, TDS, salinity and DO were 8.88, 732.19 µs/cm, 482.49, 366.16 and 6.87 mg/L, respectively. The highest and lowest concentrations of LAS were 0.039 and 0.055 mg/L, respectively. The results also showed that there is a significant relationship between LAS concentration and pH. The results of the risk assessment showed that the health risk index in all stations is less than 0.1, while the ecological risk index except at station 7, are in low risk level.
Conclusion: In general, the results show that the RQ index in the Droodzan Dam water is in appropriate range and in the low risk level. Therefore, it is necessary to conduct long-term studies in this field to ensure the persistence of optimal water conditions in the dam ecologically and health-wise.
Type of Study: Research |
Subject:
WATER
Received: 2018/10/26 | Accepted: 2019/04/22 | Published: 2019/10/13
Received: 2018/10/26 | Accepted: 2019/04/22 | Published: 2019/10/13
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