Assessment of antimony as a priority pollutant and exploration of antimony removal from aquatic environment

Download
2017
Yücel, Özge
Antimony is a metalloid element that has adverse health and environment effects at high concentrations. In this study, the antimony mining site located in the Yeşilırmak River Basin is considered as a point source and removal of antimony from aquatic environment was explored. Results indicated that surface waters in the downstream of antimony reserve are susceptible to antimony pollution. Samples collected near vicinity of the antimony mining site have exceeded Environmental Quality Standards (EQS) of antimony more than 200 times. The most effective treatment methods for antimony in aqueous environment were explored and most effective processes were identified as adsorption, membrane processes and coagulation/flocculation. In this study, natural zeolites were utilized to remove antimony ions by adsorption. Clinoptilolite originated from Gördes, Manisa deposit was investigated in its natural form for its effectiveness in removing antimony from aqueous solutions. Throughout this work, equilibrium and kinetic studies were performed with zeolite that has approximately 40 m2/g surface area. The results of equilibrium studies revealed that zeolite adsorption capacity for Sb ions increases as pH of the sample decreases. Maximum capacities attained were 2.02 mg/g for 50 mg/L initial Sb concentration. At lower initial Sb concentrations, adsorption capacities observed for zeolite was found significantly lower. For the optimum conditions, the highest removal efficiency for antimony removal achieved as 85 % by zeolite adsorption. Due to low adsorption capacity of zeolite, membrane processes were also investigated. With nanofiltration (NF270 membrane), removal efficiency was higher than 80 %, and it was possible to reach 99 % removal with Reverse Osmosis (SW30 membrane). Moreover, as an alternative method, coagulation/flocculation processes were studied with two common conventional coagulants, ferric chloride and aluminum sulfate. It was seen that 99% removal was achieved via conventional coagulation and flocculation process with ferric chloride. On the other hand, only 44% removal was achieved with aluminum sulfate. 

Suggestions

Spatial and temporal distribution of inorganic and organic pollutant concentrations at Northwestern Anatolia
Sarısaltık, Ufuk; Tuncel, Süleyman Gürdal; Department of Environmental Engineering (2019)
Concentrations of inorganic pollutants including NO2, SO2, O3 and organic pollutants including benzene, toluene, ethylbenzene, o-xylene and m&p-xylene, which are known as BTEX compounds were measured on a seasonal basis in 13 cities located in the Central and Northern parts of Anatolian Plateau. Cities included in measurements were Ankara, Bartın, Bolu, Çankırı, Düzce, Eskişehir, Karabük, Kastamonu, Kırıkkale, Kırşehir, Kütahya, Yozgat, and Zonguldak. Sampling was performed in four seasonal campaigns in eac...
Removal of boron from aqueous solutions by continuous polymer-enhanced ultrafiltration with polyvinyl alcohol
Dilek, C; Ozbelge, HO; Bicak, N; Yılmaz, Levent (2002-01-01)
Boron is a highly contaminating metal due to its toxic effects for plants even at very low concentrations. Continuous polymer-enhanced ultrafiltration (PEUF) was applied for removal of boron from aqueous solutions. The effects of operating parameters on the performance of PEUF were investigated. A commercial polymer, polyvinyl alcohol (PVA) was used as the boron-complexing agent. The methodology consists of two steps: complexing boron with PVA following separation of boron and polymer complexes by ultrafilt...
Performance of ozone and peroxone on the removal of endocrine disrupting chemicals (EDCs) coupled with cost analysis
Ölmez Hancı, Tuğba; Dogruel, S.; Emek, A. D. Allar; Yilmazer, C. Eropak; Cinar, S.; Kiraz, O.; Citil, E.; Orhon, A. Koc; Siltu, E.; Gucver, S. M.; Ozgun, O. Karahan; Tanık, Ayşe Gül; Yetiş, Ülkü (IWA Publishing, 2020-08-01)
Micropollutants such as endocrine disruptors are one of the most important groups of chemicals polluting water resources. Conventional treatment systems may not be effective for the removal of endocrine disrupting chemicals (EDCs), and the fate of these chemicals should be carefully monitored in the effluent of wastewater treatment plants (WWTPs). Additional treatment methods such as advanced oxidation processes can be used for the removal of endocrine disruptors. This study presents the existence of endocr...
Occurrence, fate and removal of endocrine disrupting compounds (EDCs) in Turkish wastewater treatment plants
KOMESLİ, Okan Tarık; Muz, M.; Ak, M. S.; BAKIRDERE, Sezgin; Gökçay, Celal Ferdi (2015-10-01)
Endocrine disrupting compounds, EDCs, are somewhat recently recognized pollutants which are often classed within 'emerging micropollutants' in the environment jargon. These compounds are known to interfere with the delicate balance of the endocrine system of animals and man, causing variety of undesirable outcomes. Their sources in natural waters are the domestic and industrial effluents. The main cause of concern with EDCs is their tendency to accumulate in fish causing gender shifts and reduced fecundity....
Comparison of trace metal concentrations in malign and benign human prostate
Yaman, Mehmet; Atici, Demet; Bakirdere, Sezgin; Akdeniz, Ismail (American Chemical Society (ACS), 2005-01-27)
Imbalance in the composition of trace metals, recognized to be essential to normal human homeostasis, besides the accumulation of potentially toxic or nonessential trace metals, may cause disease. Thus, there is a need for their analysis in cancerous and noncancerous human tissues to examine the relationship between cancer and these elements. Trace metal concentrations including Cd, Ni, Zn, Cu, Fe, Mg, and Ca in both malign and benign prostate samples were determined by atomic absorption spectrophotometry. ...
Citation Formats
Ö. Yücel, “Assessment of antimony as a priority pollutant and exploration of antimony removal from aquatic environment,” M.S. - Master of Science, Middle East Technical University, 2017.