Adsorption of Heavy Metals on Banana Peel Bioadsorbent

The ability of banana peel powder to remove lead, copper, and nickel was studied, and it was found that treating the peel powder with HCl acid increased the efficiency of the adsorption process for banana peel powder treated with acid at a concentration of 10%, as the removal percentage reached 45%, 30% and 25% for lead, copper, and nickel, respectively. As for the untreated banana peel powder, the removal percentage was 32%, 21%, and 18%. As for the treatment of banana peel powder with the base as NaOH at a concentration of 10%, it reached 20%, 15%, and 12% for each lead, copper, and nickel, respectively. When banana peel powder was treated with 40% acid, the removal percentage was 68%, 53%, and 44% for lead, copper, and nickel, respectively. The percentage of metal removal increased with increasing pH from 2 to 4, as the percentage of removing at pH 2 reached 41%, 29%, and 25%, and at pH 3 reached 65%, 40%, and 33% to reach the best removal rates at pH 4, which reached 75, 55 and 58% for lead, copper, and nickel respectively. The rates of metal removal then decreased with increasing pH, as the removal rate at pH 5 reached 69%, 46%, and 47%, at pH 6 reached 67%, 50%, and 45%, and at pH 7 reached 40%, 39% and 37% for lead, copper, and nickel, respectively.

Section: Preparation Of Banana Peelsmentioning

confidence: 99%

Study of the Use of Banana Peels Powder in Removing some Heavy Metals

Sedrah,

Alshamary

2023

“…Additionally, the structure of banana peels is very porous, which plays a significant role in the adsorption process. These pores have a high surface energy, which attracts and stores ions [16]. As a result, it was determined that banana peel is more effective than coconut husk in removing Cd and As ions, and it has been chosen as the next parameter.…”

Section: The Effects Of Different Types Of Adsorbentsmentioning

confidence: 99%

Removal of As and Cd Ions from Aqueous Solution Using Biosorption Technique

Fauzi

Fairuz²,

Shukri³

et al. 2022

Arsenic (As) and cadmium (Cd) are listed as heavy metals that have contaminated the environment, especially water supplies. Therefore, the goal of this study was to remove heavy metals, particularly As and Cd metal ions, from aqueous solutions by utilizing natural waste adsorbents and at the same time, help in the reduction of waste products. This study was designed to use low-cost and more widely available adsorbents material such as coconut husk and banana peel to remove As and Cd ions in an aqueous solution. The adsorption method was utilized to reduce and remove the As and Cd ions, and their concentrations in an aqueous solution were then determined by Atomic Absorption Spectroscopy (AAS). Various parameters such as types of adsorbents (banana peel and coconut husk), adsorbent dosages (0.1-0.3g), contact time (30-70 minutes), and temperature (25-45°C) were used to carry out the removal process. The FTIR analysis revealed that certain heavy metals were more likely to bind to these adsorbents due to the presence of important functional groups such as hydroxyl (-OH) and carbonyl (C=O). From this study, the optimum removal conditions were 0.1 g dose of adsorbent along with 70 minutes of contact time at a reaction temperature of 25°C. The results revealed that banana peel removed 0.948 mg/L of Cd ions and 0.148 mg/L of As ions from the aqueous solution, suggesting that it was more efficient at removing heavy metals than coconut husk. Meanwhile, Cd ions have a higher affinity (93.9% to 99.9% removal) than As ions (8.3% to 22.2% removal) to adsorb onto the active sites of banana peel and be removed from an aqueous solution. In conclusion, the adsorption technique using natural waste adsorbents can be applied to remove the As and Cd ions from the aqueous solutions. The reduction of these heavy metals’ concentration by adsorbents can also help to preserve the quality of water sources under the permissible limit set by WHO.

“…A study by Chang et al [13] claimed that the carboxylic group contributes to high adsorption rate due to the presence of more negatively charged groups on its surface. Hence, lemon peels and mango peels could become effective natural waste adsorbents due to the presence of a high amount of oxygen-containing functional groups on the surface of adsorbents which lead to the enhancement of metal adsorption [14].…”

Section: Characterization Of Natural Waste Adsorbentsmentioning

confidence: 99%

Simultaneous Removal of Lead, Cadmium, and Arsenic Ions from Bivalve Species Using Adsorption Method

Najamuddin

Shukri

Salleh

et al. 2022

Bivalve such as blood cockle (Tegillarca granosa) feeds by filtering the suspended particle in water including heavy metals and eventually accumulate in the fleshes. Bivalve contaminated with heavy metals might be consumed by human which later could have been exposed to heavy metals toxicity. Therefore, this study was conducted to investigate the effectiveness of adsorption process towards the removal of lead (Pb), cadmium (Cd), and arsenic (As) ions from T. granosa. The findings found that the initial concentration of Pb and As in T. granosa exceeded the permissible limits set by WHO. To remove heavy metals from T. granosa, an adsorption procedure was carried out using lemon and mango peels as natural waste adsorbents. The presence of hydroxyl and carboxylic functional groups in mango and lemon peels was shown in FTIR spectra, which aided in the enhancement of the adsorption process. A series of tests were performed using various parameters such as dosage adsorbents, contact of time, and temperature of reaction. The highest removal percentages of Pb, Cd, and As in T. granosa using lemon peels were 59.65%, 88.89%, and 67.54% respectively. Meanwhile, the maximum removal from T. granosa using mango peels were 70.18% for Pb, 100% for Cd, and 84.71% for As. In conclusion, the adsorption process was effective in removing Pb, Cd, and As in T. granosa. Whereas both lemon peels and mango peels have ability to become effective naturals waste adsorbent in the adsorption process.