Removing toxic metals from water for culture of tiger prawn, Penaeus Monodon
Water quality is one of the most impottant factors to be considered in aquaculture. There is a need to use high quality water at affordable cost to grow prawns at faster rate and supply a safe quality crop for human consumption. This study was undettaken with the aim of developing a low-cost but eff...
| मुख्य लेखक: | |
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| स्वरूप: | थीसिस |
| भाषा: | अंग्रेज़ी अंग्रेज़ी |
| प्रकाशित: |
2005
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| विषय: | |
| ऑनलाइन पहुंच: | https://eprints.ums.edu.my/id/eprint/45218/1/24%20PAGES..pdf https://eprints.ums.edu.my/id/eprint/45218/2/FULLTEXT..pdf |
| सारांश: | Water quality is one of the most impottant factors to be considered in aquaculture. There is a need to use high quality water at affordable cost to grow prawns at faster rate and supply a safe quality crop for human consumption. This study was undettaken with the aim of developing a low-cost but effective method for the removal of cadmium and lead from seawater. Agricultural wastes pn:xiuced by palm oil industry, along with used tea leaves, banana peeling, covering of durian, Jackfroit, mangosteen and coconut shells were convetted into charred materials by thermal processing. In the first instance, ability of these charred materials to adsorb lead from aqueous solution using batch and column techniques was investigated. Both techniques showed that all the charred materials were able to adsorb more than 69% of lead. However, batch technique was found to be better than the column technique. Adsorbents prepared from used tea leaves and palm oil wastes were chosen for comparison in further experiments. The used tea leaves gave the highest lead adsorption {99%}. Both materials were found to adsorb 98% of cadmium from aqueous solution as well as both the cadmium and lead present in the same solution. However, in seawater adsorbent prepared from used tea leaves was able to adsorb both metals up to 29%. The utility of the agricultural wastes {used tea leaves and palm kernel} along with a commercial grade product 'Dia Miracle' {DM} and ascorbic acid {Factor-CJ were tested for their efficiency on rearing tiger prawn {Penaeus monodon}. Water quality parameters obse,ved we,e pH, salinity, dissolved oxygen, hydrogen sulfide, nitrite, nitrate, ammonia, cadmium and lead. While the agricultural products adsorbed about 29% of cadmium and lead from the water, they left sufficient amount of ammonia in the water that proved fatal for the prawn. Further trials involving these charred materials were, therefore, discontinued. Instead, experiments using DM and Factor-C were carried forward. Both improved the seawater quality and reduced the toxic metal concentrations in the prawn tissues. |
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