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Color Removal from Industrial Wastewater by Adsorption Using Banana Leaves Ash

Rabee Islam
Graduate student
Rajshahi University of Engineering & Technology, Bangladesh,

Md. Niamul Bari*
Professor
Rajshahi University of Engineering & Technology, Bangladesh,

Abstract/ Executive Summary:

This paper presents the feasibility of removal of basic dye Methylene Blue from aqueous solutions by using a low cost natural adsorbent banana leaves ash in batch adsorption technique. The adsorption experiments were carried out under different conditions of shaking time, shaking speed, pH, incubation temperature and centrifuging time. All batch experiments were carried out with adsorbent dosage of 16 mg/100 ml of aqueous solution of dye. It was found that banana leaves ash with particle sizes varying from 0.053-0.075 mm was found to have a high adsorptive capacity towards Methylene blue dye and show favourable adsorption of MB dye. The highest removal of color is 87.66% was obtained through the experiment by shaking at 350 rpm for 3 hours, 6.30 pH and 30oC temperature. Therefore, it could be mentioned that the banana leaves ash can be used as locally available low cost adsorbent for the removal of synthetic dye from dying industry effluent.

Keywords: Wastewater, Adsorption, Color removal, Banana leaves ash, Batch adsorption.

Location: Rajshahi University of Engineering & Technology, Bangladesh

Start Date:

End Date:

Program Area: Risk Management in Agriculture

Commodity: Banana, Waste

Objectives:

The use of banana leaves ash as an adsorbent for the removal of a basic dye, Methylene Blue, is proposed. Banana leaf is a naturally occurring substance which is locally available in plenty of Bangladesh; when it is burnt to a suitable temperature, turns into ashes. Therefore, this study focuses on exploring the potential adsorbent from banana leaves ash for the removal of colorfrom aqueous solution of Methylene Blue dye through adsorption batch studies. Therefore, the main aim of the study is to find the influence of different parameters; such as shaking time, shaking speed, pH of solution, incubation temperature and centrifuging time on adsorption for color removal from MB dye solution.

Methodology:

2.1 Material Collection and Preparation of Adsorbent A lot of agricultural products and byproducts are producing throughout the year abundantly in Bangladesh. In this study, locally available Banana leaves are collected from locality of Rajshahi city, Bangladesh. The collected banana leaves are completely dried under the sun shine and burnt to obtain ash in present of oxygen. The powdered banana leaves ash is sieved through sieve no. 200 to get the desired particle size in between 0.053-0.075 mm of adsorbent. The sample is stored in air tight container. Physical characteristics of banana leaf and its ash are presented.

2.2 Preparation of Dye Solution Methylene blue was purchased from scientific store, Rajshahi, Bangladesh. An accurately measured quantity (10 mg) of dye was dissolved in 1000 ml distilled water to prepare the solution for experimental analysis. The stock solution of dye is preserved in refrigerator below the temperature of 4 oC for conducting the laboratory scale treatment experiment.

2.3 Experimental Design Five important process parameters shaking time, shaking speed, pH, incubation temperature and centrifuging time were selected from literature which could influence the removal of color from aqueous solution through adsorption process. Methylene Blue aqueous solution of 100 ml was taken in a beaker and required adsorbent dose of 16 mg was added with the solution according to Bari and Sultana (2016). The varying pH level was adjusted by using HCl and NaOH solution. Colour removal efficiency from aqueous solution of methylene blue is expressed in terms of percentage. All experiments were conducted in triplicate and average was taken.

Source of Information: Proceedings of the 5th International Conference on Civil Engineering for Sustainable Development (ICCESD 2020), 7~9 February 2020, KUET, Khulna, Bangladesh (ISBN-978-984-34-8764-3)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Dying industries are producing huge quantity of effluent containing synthetic dye elements. Indiscriminately this colored wastewater is reaching to the environment and polluting the environment that becomes threat to the flora and fauna. Dye wastewater effluent is one of the major contributors to a variety of water pollution problems. Various measures and scientific techniques have been taken for the removal of dyes from wastewater. Adsorption technique has been used in this study and tried to develop a protocol for the removal of dye elements from the colored wastewater by using a locally available low-cost material banana leaves ash as adsorbent. Five parameters, shaking time, shaking speed, pH , incubation temperature and centrifuging time were considered as the controlling factors. The highest color removal of 87.66% was achieved at shaking speed of 350 rpm for 3 hours, incubation temperature of 20oC, pH of 9.3 and centrifuging time of 12 minutes at 9000 rpm while particle size of banana leaves ash was maintained between 0.053-0.075 mm. Therefore, inexpensive and widely available banana leaves ash can be used as potential adsorbent for the removal of color from effluent discharges from dying and textile industry

Knowledge Management: Journal