CAJ | 학술논문

从福州污水处理厂的活性污泥中筛选到一菌株,高效抗Cr(Ⅵ),能把水体中高毒的Cr(Ⅵ)还原成低毒的Cr(Ⅲ).研究了该菌的生长条件,探讨了pH值、温度、初始Cr(Ⅵ)质量浓度、接种量及共存金属离子对Cr(Ⅵ)还原的影响.研究结果表明:该菌株为革兰氏阳性杆菌,有较强的还原Cr(Ⅵ)的能力;在有氧、pH 8.0、温度30 ℃及5.0 g/L葡萄糖的条件下,20 mg/L的Cr(Ⅵ)可完全被还原;且Cr(Ⅵ)的还原不受共存重金属离子的影响.
종복주오수처리엄적활성오니중사선도일균주,고효항Cr(Ⅵ),능파수체중고독적Cr(Ⅵ)환원성저독적Cr(Ⅲ).연구료해균적생장조건,탐토료pH치、온도、초시Cr(Ⅵ)질량농도、접충량급공존금속리자대Cr(Ⅵ)환원적영향.연구결과표명:해균주위혁란씨양성간균,유교강적환원Cr(Ⅵ)적능력;재유양、pH 8.0、온도30 ℃급5.0 g/L포도당적조건하,20 mg/L적Cr(Ⅵ)가완전피환원;차Cr(Ⅵ)적환원불수공존중금속리자적영향.
One chromate-reducing strain was isolated from the activated sludge of Fuzhou, and can effectively reduced toxic Cr (Ⅵ) to less toxic Cr (Ⅲ) from wastewater.The optimum conditions of growth of the strain and factors affecting reduction efficiency of Cr (Ⅵ),such as the temperature,the pH value of solution,the concentration of Cr(Ⅵ),inoculation inoculums and the coexistence of metal ions,were studied.The results show that the strain is a gram-positive bacillus and reduction capacity for Cr(Ⅵ) is strong.Cr(Ⅵ) was reduced completely at the concentration of 20 mg/L under the aerobic conditions,pH 8.0,30 ℃ and glucose(5.0 g/L);and reduction efficiency of Cr(Ⅵ) is not affected by coexistence of metal ions.