Zinc (II) removal through adsorption using activated carbon produced from agricultural residue | |
| Author | Kittiya Tamrongterakul |
| Call Number | AIT Thesis no.EV-17-08 |
| Subject(s) | Zinc--Environmental aspects Membranes (Technology) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-17-08 |
| Abstract | Heavy metals are the one of important cause of water pollution lead to damage human health and aquatic life. Zinc is an essential element and offer positive effect for a healthy body. On the other hand, if consumed in excess, it can damage the body. It is non-biodegradable pollutants and very difficult to eliminate by normal methods. Zinc removal through adsorption method by using agricultural residue is an alternative technique which can reduce agricultural wastes and obtain benefit for using as adsorbent. In this study, the ability of adsorbents product from durian peel and mangosteen peel was considered for adsorption of zinc in batch experiments. The chemical activation method proposed by different conditions include chemical, contact time, concentration and temperature. Adsorption factors consisted of initial zinc concentration, adsorbent dose, contact time and initial pH to identify the optimum condition. Moreover, isotherm and kinetic models were used to explain maximum adsorption capacity and adsorption mechanism. Finally, adsorbent regeneration was studies to assess suitable management. The results showed the appropriate condition for producing adsorbent. For durian peel, using 1N KOH and heating at 400 °C (DPK). For mangosteen peel, using 1N H3PO4 and heating at 600 °C (MPP). The optimum zinc adsorption capacity by using DPK and MPP as adsorbent (qm = 23.42 and 4.39 mg/g) were initial zinc concentration 100 mg/l, adsorbent dose 10 g/l, contact time 120 minute and pH 5. FT-IR result showed two different materials had same different functional group on adsorbent surface which may affect adsorption efficiency. The adsorption isotherm resulted that adsorption of zinc on DPK fit well the Freundlich isotherm (R2 = 0.9950) and Pseudo second order kinetic (R2 = 0.9925) but MPP fie well Langmuir isotherm (R2 = 0.9700) and Pseudo second order kinetic (R2 = 0.9854). Regeneration experiments indicated that the highest desorption efficiency using 0.1N HCI was 60.54% for DPK and 0.1N EDTA was 42.82% for MPP. After desorption, adsorption efficiency can be enhanced from 80.64% to 83.84% by using DPK as biosorbent. ON the other hand, adsorption efficiency was decreased from 24.89% to 22.68%. Adsorption by durian peel and mangosteen peel have potential to remove zinc in aqueous solution. |
| Year | 2017 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Annachhatre, Ajit P.; |
| Examination Committee(s) | Visvanathan, C.;Soni, Peeyush; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2017 |