Biosorption has been widely used as a more efficient alternative for the current expensive approach to heavy metal remediation from water and waste water. The effectiveness of ripe Musa sapientum (MSR) and ripe Musa cardaba (MCR) peels in the removal of Cd2+, Fe2+, Pb2+, Zn2+ ions was investigated. The amount of metal ions sorbed depended on the metal ion – adsorbent contact time, ion concentration and adsorbent weight. Weight of adsorbent was varied between 0.1 – 0.4g; contact time, 5 – 25 minutes; and ion concentration, 0.01 – 0.04M. The results indicated that Musa sapientum (Ripe) showed higher percentage sorption in removing metal ions from waste water than Musa cardaba (Ripe) peels. The peak percentage sorption of metal ions by MSR peel waste are; Cd2+ (99.95%), Fe2+ (100%), Pb2+ (100%), Zn2+ (99.92%) while metal ions by MCR peel waste was; Cd2+ (99.74%), Fe2+ (99.83%), Pb2+ (100%), Zn2+ (99.60%). The results obtained above showed that both adsorbent species are favourable for sorption and removal of the test heavy metals from their aqueous environment. Nevertheless, ripe Musa sapientum (MSR) is highly recommended for both Fe2+ and Pb2+ uptake due to its sorption capacity and efficiency.
Table of Contents
1.1 INTRODUCTION
1.2 SCOPE/ LIMITATION OF THE STUDY
1.3 OBJECTIVES OF THE STUDY
1.4 SIGNIFICANCE OF THE STUDY
2.1 LITERATURE REVIEW
2.2 HEAVY METAL CHEMISTRY
2.3 HEAVY METAL POLLUTION
2.4 BENEFICIAL HEAVY METALS
2.5 VARIOUS HEAVY METALS AND THEIR EFFECTS
2.5.1 LEAD (Pb)
2.5.2 IRON (Fe)
2.5.3 ZINC (Zn)
2.5.4 CADMIUM (Cd)
2.6 AGRICUTURAL WASTES USED AS ADSORBENTS IN THE REMOVAL OF HEAVY METALS
2.6.1 Rice husk
2.6.2 Bagasse pitch
2.6.3 Sawdust
2.6.4 Soybean hulls, cottonseed hulls, rice bran and straw
2.6.5 Further agricultural waste adsorbents
3.1 MATERIALS AND METHODS
3.2 PREPARATION OF THE BANANA PEELS
3.3 SYNTHETIC WASTE WATER PREPARATION
3.4 ABSORPTION EXPERIMENT
3.4.1 TIME VARIATION PROCEDURE
3.4.2 WEIGHT VARIATION PROCEDURE
3.4.3 CONCENTRATION VARIATION PROCEDURE
3.5 ANALYSIS OF SAMPLES
4.1 RESULTS AND DISCUSSION
4.1.1 Effect of MSR and MCR on Pb (ii) ions
4.1.2 Effect of MSR and MCR on Zn (ii) ions
4.1.3 Effect of MSR and MCR on Cd (ii) ions
4.1.4 Effect of MSR and MCR on Fe (ii) ions
4.2 CONCLUSION
Objectives and Research Themes
This study aims to investigate and compare the effectiveness of agricultural waste, specifically banana peels (Musa sapientum and Musa cardaba), as a low-cost and sustainable biosorbent for removing heavy metal ions like Pb, Cd, Fe, and Zn from wastewater.
- Biosorption of heavy metals using agricultural biomass
- Comparative analysis of Musa sapientum and Musa cardaba peels
- Impact of experimental parameters (contact time, adsorbent weight, and concentration)
- Waste-to-wealth strategy for environmental sustainability
- Remediation of industrial effluent pollutants
Excerpt from the Book
1.1 INRODUCTION
The presence of heavy metal ions in our environment is a major concern due to their toxicity to many life forms. Heavy metal contamination exists in aqueous wastes of many industries, such as metal plating, mining operations, tanneries, smelting, alloy industries and storage batteries industries, etc. (Kadirvelu, K et al: 2001). The extreme discharge of heavy metals into the environment due to industrialization and urbanization has posed a great problem worldwide. Unlike organic pollutants, the majority of which are susceptible to biological degradation, heavy metal ions do not degrade into harmless end products (Gupta, V.K et al: 2001). The conventional treatment processes for heavy metal remediation from wastewater include precipitation, membrane filtration, ion exchange, adsorption, and coprecipitation/ adsorption. Further research on the treatment of industrial effluents containing heavy metal have revealed adsorption to be a highly effective technique for the removal of heavy metal from waste water rather than the expensive conventional approaches (Chand, S et al: 1994).
In this era the need for safe and economical methods for the removal of heavy metals from polluted waters has necessitated research interest towards the production of low cost and efficient alternatives to removing heavy metals from waste water. The low cost agricultural wastes such as sugarcane bagasse (Mohan D., and Singh K.P: 2002), rice husk (Munaf E., and Zein R: 1997), sawdust (Selvi K et al: 2001), coconut husk (Chand, S et al: 1994), neem bark (Ayub, S et al: 2001) etc., for the elimination of heavy metals from wastewater have been investigated by the above researchers. The cost of acquiring these biological wastes is necessary in comparing the different adsorbents due to their individual processing requirements as well as local availability. Therefore, an adsorbent can be termed as a low cost adsorbent if it requires little processing, is abundant in nature, or is a by-product or waste material from another industry (Bailey, S.E et al: 1999). It is imperative to harness different agricultural wastes and their effectiveness in the removal of heavy metals from their aqueous environment.
Summary of Chapters
1.1 INRODUCTION: Discusses the environmental impact of heavy metal contamination and the necessity of finding cost-effective, sustainable adsorption methods using agricultural waste.
1.2 SCOPE/ LIMITATION OF THE STUDY: Defines the use of banana peel species for removing specific heavy metals and acknowledges challenges such as budget and time constraints.
1.3 OBJECTIVES OF THE STUDY: Outlines the goal of utilizing biomass for metal removal and comparing the efficiency of two specific banana species.
1.4 SIGNIFICANCE OF THE STUDY: Highlights the benefit to researchers and the potential for economic impact through waste-to-wealth practices.
2.1 LITERATURE REVIEW: Reviews the chemical properties of target heavy metals and existing research on agricultural by-products as biosorbents.
2.2 HEAVY METAL CHEMISTRY: Explains the characteristics of heavy metals and their classification as transition metals or pollutants.
2.3 HEAVY METAL POLLUTION: Details the sources of heavy metal pollution and the dangers posed to human health and the ecosystem.
2.4 BENEFICIAL HEAVY METALS: Notes that certain trace elements are nutritionally essential in minute quantities for healthy life.
2.5 VARIOUS HEAVY METALS AND THEIR EFFECTS: Examines individual properties, sources, uses, and toxicity levels of Lead, Iron, Zinc, and Cadmium.
2.6 AGRICUTURAL WASTES USED AS ADSORBENTS IN THE REMOVAL OF HEAVY METALS: Reviews prior studies on various adsorbents like rice husk, bagasse, sawdust, and soybean hulls.
3.1 MATERIALS AND METHODS: Describes the general procedural approach for the removal of heavy metals using banana peels.
3.2 PREPARATION OF THE BANANA PEELS: Outlines the step-by-step physical processing, drying, and pulverization of the banana peels into an adsorbent powder.
3.3 SYNTHETIC WASTE WATER PREPARATION: Details the creation of standard heavy metal solutions used for the experiments.
3.4 ABSORPTION EXPERIMENT: Explains the experimental design regarding time, weight, and concentration variation.
3.5 ANALYSIS OF SAMPLES: Describes the use of Atomic Absorption Spectrophotometry (AAS) to measure the results of the sorption process.
4.1 RESULTS AND DISCUSSION: Presents data tables and figures demonstrating the effectiveness of the chosen peels on metal ion uptake.
4.2 CONCLUSION: Concludes that banana peel waste is a highly effective, cheap, and readily available alternative for heavy metal remediation.
Keywords
Biosorption, Heavy metals, Musa sapientum, Musa cardaba, Wastewater remediation, Agricultural waste, Adsorbent, Lead, Iron, Zinc, Cadmium, Environmental sustainability, Waste-to-wealth, Atomic Absorption Spectrophotometry, Adsorption capacity
Frequently Asked Questions
What is the primary focus of this research project?
The project investigates the efficiency of using agricultural waste, specifically peels from two banana species, to remove heavy metals from wastewater.
What are the central themes of the work?
The central themes are environmental sustainability, the "waste-to-wealth" concept, and the chemical application of low-cost biological adsorbents for heavy metal remediation.
What is the primary research goal?
The goal is to determine if banana peels can serve as an effective, economical alternative to expensive conventional chemical methods for cleaning heavy metal-polluted water.
What scientific methods were utilized?
The researchers used batch experiments to vary contact time, adsorbent weight, and metal concentration, followed by analysis via Atomic Absorption Spectrophotometry (AAS).
What does the main body cover?
It covers the literature review on heavy metals, detailed methodology for adsorbent preparation, experimental procedures, and a comprehensive discussion of results derived from the lab tests.
Which keywords best characterize this work?
The work is characterized by terms like Biosorption, Musa sapientum, Musa cardaba, Heavy metals, and Wastewater remediation.
Which banana peel species showed better results for Fe2+ and Pb2+?
The study found that ripe Musa sapientum (MSR) peels are highly recommended for the uptake of both Iron (Fe2+) and Lead (Pb2+) due to their superior sorption capacity and efficiency.
How does concentration affect the adsorption process?
The study observed a progressive increase in adsorption capacity for most metals as the concentration of the metal ions increased, although outcomes varied depending on the specific metal and adsorbent used.
- Quote paper
- Kingsley Udoakpan (Author), 2011, Comparative Study on the Effectiveness of Musa Sapientum and Musa Cardaba Peel Waste in the Removal of Heavy Metals from Waste Water, Munich, GRIN Verlag, https://www.grin.com/document/203234
