Earticle

초록

영어

As today’ technology progresses and increment in industrial activities, a high volume of wastewater containing heavy metal is released to the natural environment. Heavy metal pose a significant threat to the environment and public health because of their toxicity, accumulation in the food chain and persistence in nature. According to the World Health Organization (WHO), the metals of most immediate concern are cadmium, chromium, cobalt, copper, lead, nickel, stainless steel, nickel electroplating, battery and accumulator manufacturing, pigments, ceramic and porcelain enameling industries wastewaters contain an undesirable amounts of nickel(II) ions. Nickel at trace amount maybe beneficial as an activator of some enzyme systems but if the nickel(II) ion intake over the permissible levels results in different types of diseases such as pulmonary fibrosis, lung cancer, renal edema, skin dermatitis and gastrointestinal disorder such as nausea, vomiting diarrhea [1-3]. Therefore, the elimination of these metals from water and wastewaters is important to protect public health. Traditional technologies for removal of heavy metals from wastewaters include chemical precipitation, ion-exchange, biosorption, reverse osmosis, evaporation and electrolysis [4-6].The present study explores the ability of T. versicolor (rainbow) biomass for the removal of Ni(II) under different experimental conditions. The effects of relevant parameters such as pH of solution, contact time, biomass dosage, initial metal ion concentration and temperature. The maximum Ni(II) adsorption was obtained at pH 4.0. Further, the biosorbent was characterized by Fourier Transform Infrared Spectroscopy (FTIR), BET Surface area analysis and Scanning Electron Microscopy (SEM). The biosorption data of Ni(II) ions at 303, 313 and 323 K are fitted to Langmuir and Freundlich isotherm models. Langmuir model fitted the equilibrium data better than the Freundlich isotherm. The calculated thermodynamic parameters, ΔGo, ΔHo and ΔSo showed that the biosorption of Ni(II) ions onto T. versicolor (rainbow) biomass was feasible, spontaneous and endothermic at 303-323 K. Experimental data were analysed in terms of pseudo-first-order, pseudo-second-order and intraparticle diffusion models. The results showed that the biosorption process of Ni(II) ions followed well pseudo-second-order kinetics. Based on the results, it can be concluded that the T. versicolor (rainbow) is an effective and alternative biomass for the removal of Ni(II) ions from aqueous solution.

키워드

저자

• Venkata Subbaiah MUNAGAPATI [ Department of BIN Fusion Technology. ]
• Yeong-Sang YUN [ Department of BIN Fusion Technology. ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국생물공학회 학술대회

• 간기

  반년간

• 수록기간

  1985~2013

• 십진분류

  KDC 476 DDC 576