Removal effect and mechanism of Sb(Ⅲ)from water by immobilized antimony oxidizing bacteria K.aerogenes HC10
In view of the toxicity of Sb(Ⅲ)in the aqueous environment,we prepared immobilized antimony oxidizing bacteria by embedding method,aiming to study the effect and mechanism of their removal of Sb(Ⅲ)in water.The effects of different factors on the treatment of antimony-containing wastewater by immobilized antimony oxidizing bacteria were investigated by changing the dosage amount,initial concentration of Sb(Ⅲ)and initial pH value of immobilized antimony oxidizing bacteria.The results showed that the removal rate of Sb(Ⅲ)increased with the increase of the amount and initial pH of the immobilized antimony oxidizing bacteria,and decreased with the increase of the initial concentration of Sb(m),and the removal rate of Sb(Ⅲ)reached 74.31％after 72 h of culture under the conditions of 2％of the immobilized antimony oxidizing bacteria,0.1 mmol/L of Sb(Ⅲ)and 8.5 of the initial pH.The immobilized antimony oxidizing bacteria were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy,and it was found that the immobilized antimony oxidizing bacteria had a porous 3D network structure,which provided nutrients and places for the growth and reproduction of antimony oxidizing bacteria,and had a good adsorption effect on Sb.The functional groups—OH,—C—O,—C=C play a major role in the binding of antimony.
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