Chang B V, Yu C H, Yuan S Y
Department of Microbiology, Soochow University, Shih Lin, Taipei 111, Taiwan.
Chemosphere. 2004 Apr;55(4):493-500. doi: 10.1016/j.chemosphere.2004.01.004.
We investigated the degradation of nonylphenol monoethoxylate (NP1EO) and nonylphenol (NP) by anaerobic microbes in sediment samples collected at four sites along the Erren River in southern Taiwan. Anaerobic degradation rate constants (k1) and half-lives (t1/2) for NP (2 microg/g) ranged from 0.010 to 0.015 1/day and 46.2 to 69.3 days respectively. For NP1EO (2 microg/g), the ranges were 0.009-0.014 1/day and 49.5-77.0 days respectively. Degradation rates for NP and NP1EO were enhanced by increasing temperature and inhibited by the addition of acetate, pyruvate, lactate, manganese dioxide, ferric chloride, sodium chloride, heavy metals, and phthalic acid esters. Degradation was also measured under three anaerobic conditions. Results show the high-to-low order of degradation rates to be sulfate-reducing conditions > methanogenic conditions > nitrate-reducing conditions. The results show that sulfate-reducing bacteria, methanogen, and eubacteria are involved in the degradation of NP and NP1EO, with sulfate-reducing bacteria being a major component of the river sediment.
我们研究了台湾南部二仁溪沿线四个地点采集的沉积物样本中，厌氧微生物对壬基酚单乙氧基化物（NP1EO）和壬基酚（NP）的降解情况。NP（2微克/克）的厌氧降解速率常数（k1）和半衰期（t1/2）分别在0.010至0.015 1/天和46.2至69.3天之间。对于NP1EO（2微克/克），范围分别为0.009 - 0.014 1/天和49.5至77.0天。NP和NP1EO的降解速率随温度升高而加快，而添加乙酸盐、丙酮酸盐、乳酸盐、二氧化锰、氯化铁、氯化钠、重金属和邻苯二甲酸酯则会抑制其降解。还在三种厌氧条件下测量了降解情况。结果表明，降解速率从高到低的顺序为：硫酸盐还原条件＞产甲烷条件＞硝酸盐还原条件。结果表明，硫酸盐还原菌、产甲烷菌和真细菌参与了NP和NP1EO的降解，其中硫酸盐还原菌是河流沉积物的主要成分。
