微生物与类Fenton氧化联合降解水溶液中萘

Biodegradation of Naphthalene using Bacillus Fusiformis Combined with a Fenton-like Oxidation in Aqueous Solution

通过微生物-类Fenton氧化联合技术提高水溶液中萘的降解.实验结果表明:投加量为200 mg·L-1的50 mL萘溶液经纺锤芽孢杆菌(BFN)降解96 h后,萘的去除率达100%,而溶液中COD的去除率仅为59.4%,说明溶液中还存在萘的降解中间产物.在纳米零价铁(nZVI)投加量为1.0 g·L-1,H2O2为10mmol·L-1,pH为3.0,温度35℃的优化条件下,对BFN降解40 h后的溶液进行类Fenton氧化,溶液COD的去除率达到86.7%.最终,微生物-类Fenton氧化联合法对200 mg·L-1萘溶液的COD总去除率高达91.6%.

In this paper, to enhance the degradation of naphthalene in aqueous solution, the technology of combined biodegradation and Fenton-like oxidation was used. When the initial of naphthalene concentration is 200 mg ·L^-1 , within 96 h the elimination rate of COD is only 59.4% with the single technology of biodegradation. However after the 40 h of degradation by bacillus fusi- formis, the technology of Fenton-like was adopted to improve the degradation rate. And the optimal experiment conditions were as follows： the temperature was 35 ℃, pH was 3.0, H202 was 10 mmol ·L^-1 , the addition of nZVI was 1.0 g ·L^-1. Under these condi moval of COD reached up to 86.7%. Finally, the removal of COD was 91.6% by technology. tions dosage of , the re- combined