Biosorbents for waste water cleaning from coloring agents

International Conference on the Sustainable Energy and Environmental Development

生态环境科学

Orzechowska-Ziba, A.^1 ; Jodlowski, G.S.^1 ; Wójcik, M.^1

AGH University of Science and Technology, Mickiewicza Av. 30, Krakow

30-059, Poland^1

关键词: Adsorption capacities;    Adsorption cleaning;    Adsorption process;    Bromocresol greens;    Dye concentration;    Preparation process;    Removal efficiencies;    Wastewater cleaning;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/214/1/012031/pdf
DOI  :  10.1088/1755-1315/214/1/012031

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The objective of the experimental work was to determine the removal efficiency of selected dyes from aqueous solutions using an adsorption process. Studies of adsorption from aqueous solution on a laboratory scale were performed for the two dyes, bromocresol green and methyl orange. Activated carbon from coconut shell, lignite from Belchatów mine and biosorbent from orange peel as an alternative adsorbent were used. For the study were selected grain fractions of φ=1.0-1.5 mm. The experiment was carried out at constant room temperature for 30 minutes in static conditions of contact. The influence of both dye concentration in the solution, and the dosage of sorbent to the dye sorption capacity is stated. The results are presented as isotherms. Biosorbent preparation process should be modified in order to avoid its decay under dye sorption from an aqueous solution. Biosorbent is comparable porous material to active carbon AC1 for bromocresol green when they have adsorption capacity am [mmol•g-1] 0.0199 and 0.0209, respectively. In the case of methyl orange adsorption capacity is 0.2061for AC1 and 0.0135 for biosorbent. It means that in second case biosorbent is weak adsorbent for water cleaning, even worse than lignite Be (am=0.0399 [mmol•g-1]. Finally, this kind of biosorbent is not suitable for adsorption cleaning of water for methyl orange at this stage of processing because maceration of material and freeing of natural dye occur.