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Vennila, A.
- Efficacy of Chelating Agents in Phytoremediation of Cadmium Using Lemna minor (Linnaeus, 1753)
Abstract Views :155 |
PDF Views:1
Authors
R. Aravind
1,
V. S. Bharti
1,
M. Rajkumar
1,
P. K. Pandey
1,
C. S. Purushothaman
2,
A. Vennila
3,
S. P. Shukla
1
Affiliations
1 Aquatic Environment and Health Management Division, Central Institute of Fisheries Education, Indian Council of Agricultural Research, Mumbai-400 061, Maharashtra, IN
2 Central Marine Fisheries Research Institute, Kochi, IN
3 Sugarcane Breeding Institute, Coimbatore, IN
1 Aquatic Environment and Health Management Division, Central Institute of Fisheries Education, Indian Council of Agricultural Research, Mumbai-400 061, Maharashtra, IN
2 Central Marine Fisheries Research Institute, Kochi, IN
3 Sugarcane Breeding Institute, Coimbatore, IN
Source
Nature Environment and Pollution Technology, Vol 15, No 2 (2016), Pagination: 509-514Abstract
Free floating aquatic macrophyte namely Lemna minor (Linnaeus, 1753) was exposed to different concentrations of cadmium (1, 5 and 10 mg/L) for a period of 30 days to evaluate its cadmium (Cd) accumulation capability in the presence of chelating agents such as EDTA and citric acid. The chelating agents were added at the rate of 1, 2 and 3 mg/L separately and the experiment was conducted in triplicate. The water and plant samples were collected at 15 days interval for the analysis of cadmium. There was a significant difference in the Cd uptake (P<0.05) by the plant in the presence of chelating agents when compared to the control. Bioconcentration factor (BCF) of cadmium by the plants showed an increasing trend in the presence of chelating agents. The percentage uptake of cadmium by L. minor in the presence of EDTA was significantly higher than that of citric acid (P<0.05). The overall results suggest that EDTA can be effectively used to enhance phytoremediation efficiency of cadmium by L. minor in the contaminated water.Keywords
Cadmium, Chelating Agents, Bioconcentration Factor, Lemna minor.Full Text
References
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- Characterization of Arsenic Resistant Bacteria from Shallow Tubewell and Evaluation of their Remediation Capacity
Abstract Views :173 |
PDF Views:1
Authors
Affiliations
1 Central Inland Fisheries Research Institute, Barrackpore-700 120, West Bengal, IN
1 Central Inland Fisheries Research Institute, Barrackpore-700 120, West Bengal, IN
Source
Nature Environment and Pollution Technology, Vol 14, No 1 (2015), Pagination: 119-124Abstract
The present study was conducted to characterize arsenic resistant bacteria and to evaluate their arsenic remediation capacity. Water samples were collected from the shallow tubewell of Deganga, West Bengal. The arsenic content of shallow tubewell water was 45.07 μg/L. 16S rDNA analysis characterized the isolated arsenic resistant bacteria from the shallow tubewell water to be under the genus Pseudomonas and Acinetobacter. Minimum inhibition concentration (MIC) of arsenic for the selected bacterial isolates Pseudomonas sp. and Acinetobacter sp. was found to be 7 and 17.5 mM As(III), respectively. The selected bacterial isolates were capable of removing arsenic in the range of 1.54-5.95% from the nutrient broth supplemented with 25, 50, 75 and 100 mg/L As(III). Analysis of variance (ANOVA) indicated a significant difference (P<0.05) in arsenic removal between the arsenic concentrations, but there was no significant difference (P>0.05) between the selected bacterial isolates. The selected bacterial isolates could thus be useful for developing a technology for biological removal of arsenic by standardizing certain parameters for the optimum removal of arsenic by the selected bacterial isolates.Keywords
Arsenic, Arsenic Resistant Bacteria, Arsenic Removal, 16S rDNA, Tubewell Water.Full Text
- Efficacy of an Integrated System Incorporated with Eichhornia crassipes in Phytoremediation of Calcium from Inland Saline Water
Abstract Views :153 |
PDF Views:0
Authors
K. R. Om Pravesh
1,
V. S. Bharti
1,
A. Vennila
2,
S. P. Shukla
1,
V. Harikrishna
3,
Y. Gladston
1,
R. Aravind
4
Affiliations
1 Aquatic Environment and Health Management Division, Central Institute of Fisheries Education, Indian Council of Agricultural Research, Mumbai-400 061, Maharashtra, IN
2 Sugarcane Breeding Institute, Coimbatore, IN
3 Central Institute of Fisheries Education, Rohtak, Haryana, IN
4 Central Institute of Brackishwater Aquaculture, Chennai, IN
1 Aquatic Environment and Health Management Division, Central Institute of Fisheries Education, Indian Council of Agricultural Research, Mumbai-400 061, Maharashtra, IN
2 Sugarcane Breeding Institute, Coimbatore, IN
3 Central Institute of Fisheries Education, Rohtak, Haryana, IN
4 Central Institute of Brackishwater Aquaculture, Chennai, IN
Source
Nature Environment and Pollution Technology, Vol 16, No 3 (2017), Pagination: 687-694Abstract
In the present study, free floating plant Eichhornia crassipes was used for the phytoremediation of calcium from inland saline water by using water having salinity of 2.5, 5 and 7.5 ppt for one week each. Water samples were collected on 0th, 4th and 6th day and plant sample was at end of the experiment for calcium estimation and for other water quality parameters i.e., total hardness (TH), total alkalinity (TA), dissolved oxygen (DO), carbon dioxide (CO2), potassium (K) and pH on 0th and 6th day of the experiment. There was a significant difference in the calcium uptake (P<0.05) by the plants compared to the 0th day samples. The higher percentage removal of calcium was noted at 2.5 ppt salinity (47.7%) followed by 5 and 7.5 ppt salinity (36.04 and 23.13%) respectively. There was significant improvement in the water quality characteristics. In first cycle at 2.5 ppt salinity, the initial concentration of TH, TA, K and CO2 was 833.33, 166.66, 2.7 and 2.6 mg.L-¹ which decreased to 813.33, 144.66, 1.7 and 0 mg.L-¹ respectively, at the end of experiment. Similarly, there was a decrease in the concentration of pH noted from 8.5 to 8.2. An increase was obtained in the concentration of DO i.e., from 6.3 to 7.1 mg.L-¹. The trend of decreasing was observed for other cycles also. The used integrated system (sand filter + charcoal filter + coconut coir bed filter incorporated with E. crassipes) was efficient for calcium removal and higher percentage removal was obtained at 2.5 ppt salinity followed by 5 and 7.7 ppt. At 2.5 ppt, higher percentage removal was obtained in second cycle i.e. 47.7% compared to first and third cycle i.e. 45 and 46.22% respectively. Similar trend of percentage removal was obtained at 5 and 7.5 ppt i.e., 36.04 and 23.13% respectively than other two cycles. The overall results suggest that finding of this study will serve as a baseline for treatment of inland saline water to make it useful for various agricultural and aquaculture applications.Keywords
Calcium, Inland Saline Water, Phytoremediation, Eichhornia crassipes.Full Text