Removal of chromium (VI) from synthetic aqueous solution by adsorption onto coal bottom ash | |
| Author | Chawanlak Chaimung |
| Call Number | AIT Thesis no.EV-18-05 |
| Subject(s) | Coal ash Adsorption chromium |
| 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-18-05 |
| Abstract | In this study, coal bottom ash was used as adsorbent for chromium (VI) removal from synthetic aqueous solution under batch condition. Three different adsorbents preparations of coal bottom ash without and with thermal activation and activated coal bottom ash with iron addition. Thermal activation method at 500°C was carried out for the preparation of activated coal bottom ash adsorbent. Moreover, Batch sorption experiment of coal bottom ash without and with thermal activation were studied with three effects which are effect of L/S ratio (100 ml : 0.2 g, 1.25 g, and 5 g), effect of initial concentration (5 ppm, 50 ppm, and 400 ppm), effect of contact time (30 min, 1, 2, 3 ,4, 6, 24 hour). The optimum L/S ratio which is 100 ml: 5 g was obtained in the batch sorption of activated coal bottom ash with iron addition. Furthermore, adsorption isotherms and kinetic models were used to explain adsorption behavior of coal bottom ash without and with thermal activation. In addition, the maximum chromium (VI) adsorption of three bottom ash adsorbents were indicated. Results of batch sorption experiments, Freundlich isotherm was the best fit for describe chromium (VI) adsorption of bottom ash without and with thermal activation. Kinetics data fitted well for Pseudo second order model. Moreover, the maximum chromium (VI) adsorbed (qm) by using bottom ash without and with thermal activation, and activated coal bottom ash with iron addition were 0.018 mg/g, 0.058 mg/g, and 0.501 mg/g respectively. |
| Year | 2018 |
| 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) | Ekbordin Winijkul;Soni, Peeyush |
| Scholarship Donor(s) | Royal Thai Government;sian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2018 |