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Date [ 2014-01-15, 05:15 ]

The fruits are now good for more than just eating.

Durio zibethinus

(Kuala Lumpur=Koreanpress) by Ramani Rathir = Malaysians consider the durian as the King of Fruits! Come the season of its ripening and nearly every Malaysian must have a taste of the fruit. Some will travel miles around to their favourite orchard for a feast there itself.

But now a different use has been found for it then just as a culinary experience. No one would have guessed that it would become an agent to clean up the environment. The
durian’s skin with the banana stem is now able to remove effluents.

Under its scientific name, Durio zibethinus L. and the Banana Pseudostem Fibers: become Microsorbent for the removal of oil from aqueous solution. Nature’s way of removing effluents.

This study explored the use of inexpensive materials as alternatives to treat effluents from various industries such as petroleum, metals, food processing, textile, industries as well as municipal waste waters and has become a global environmental issue.

This study by researchers at Universiti Technology Malaysia explored the use of inexpensive materials as alternatives to treat effluents from various industries such as petroleum, metals, food processing, textile and other industries. It also took in experiments on municipal wastewaters which have now become a global environmental issue.

These effluents containing oil can cause serious detrimental environmental impact on the receptor water bodies and induce detrimental effects to aquatic life. Malaysia has had cases of schools of freshwater fish floating up dead from river beds. In September 2013, the Malacca River had hundreds of Tilapia fish floating in it and causing an awful stench.

 It also causes serious problems to wastewater treatment plants. As existing sewage treatment plants in this country are mostly oxidation ponds, these new methods of treatment should help solve their current problems which persist until today. These are odour emission, instability in treatment process and excessive sewage production. Due to the high stability of the effluents, separation can only occur with the help of chemical clarification.
The banana pseudostem

Batch adsorption study was conducted to evaluate efficiencies of two different agriculture wastes as micro sorbent to remove oil from aqueous solution.
The agriculture waste used in this study was Durian Shell (DS) and Banana Pseudostems (BPS). These are naturally occurring plants found abundantly in Malaysia. The durian fruit is a seasonal fruit and which emits its distinctive pungent smell a. The banana fruit is a non- seasonal fruit and is found in abundance in Malaysia. A detailed batch study to determine its adsorption equilibrium, isotherm and kinetics was carried out at ambient temperatures, various initial concentrations of oil and stirring time.

Banana pseudostem was found to be more effective than Durian Shell in removing oil from water. Langmuir and Freundlich adsorption models were applied to describe the experimental isotherm and isotherm constants. The kinetic data was best fitted to the pseudo-second-order kinetic model. The role of DS and BPS in the removal of oil from aqueous wastes was investigated. The researchers concluded that BPS performed exceptionally well to remove oil from aqueous solution as compared to DS.

Langmuir and Freundlich adsorption models were applied to describe the experimental isotherm and isotherm constants. Equilibrium data fitted well with the Freundlich model. Thus it is reasonable to conclude that the adsorptions of oil on both adsorbents that consist of heterogeneous adsorption sites are similar to each other in respect of the adsorption phenomenon. Kinetic studies indicated that the sorption of oil tend to follow pseudosecond- order kinetics for the range of studied concentrations.

With this study, it is hoped new avenues of exploring the possibility of using inexpensive materials to remove oil from aqueous solution will emerge.

abc@koreanpress.net

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