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采用超高效液相色谱法(UPLC),研究初始质量浓度1μg·m L-1二硫氰基甲烷在不同温度、p H值、COD值水体条件下的消除规律.结果表明:在5~35℃水温范围内,二硫氰基甲烷的消除速率为:V35℃>V25℃>V15℃>V5℃,35℃水体中,第20天二硫氰基甲烷未被检出.在p H 5.0~9.0的水中二硫氰基甲烷的平均消除速率为:Vp H9.0>Vp H8.5>Vp H8.0>Vp H7.5>Vp H7.0>Vp H6.5>Vp H6.0>Vp H5.5>Vp H5.0,平均消除速率随着p H值的升高而变大,酸性条件下稳定,不易分解,p H≥8.0的弱碱性条件下极易分解.在COD值为0~30 mg·L-1的水中二硫氰基甲烷的平均消除速率表现为:V30 mg·L-1>V20 mg·L-1>V10 mg·L-1>V0 mg·L-1,二硫氰基甲烷的消除速率随着COD值的增大而变大.
Using ultra-performance liquid chromatography (UPLC), the elimination rules of dithiocyanomethane with initial concentration of 1μg · m L-1 under different temperature, pH value and COD were studied.The results showed that under the condition of 5 ~ 35 ℃, the dithiocyanomethane disappearance rate was: V35 ℃> V25 ℃> V15 ℃> V5 ℃, dithiocyanomethane was not detected on the 20th day in 35 ℃ water, 9.0 The average rate of elimination of dithiocyanomethane from water is: Vp H9.0> Vp H8.5> Vp H8.0> Vp H7.5> Vp H7.0> Vp H6.5> Vp H6.0> Vp H5.5> Vp H5.0, the average elimination rate increases with the increase of p H, stable under acidic conditions, not easy to decompose, p H ≥ 8.0 weakly alkaline conditions easily decomposed in the COD value of The average elimination rate of dithiocyanomethane in water of 0-30 mg · L-1 was as follows: V30 mg · L-1> V20 mg · L-1> V10 mg · L-1> V0 mg · L-1, The rate of elimination of dithiocyanomethane increases with increasing COD value.