Degradation of dimethyl terephthalate ester and its isomer by mangrove microorganisms

TY - JOUR

T1 - Degradation of dimethyl terephthalate ester and its isomer by mangrove microorganisms

AU - Li, Jiaxi

AU - Gu, Ji-Dong

PY - 2004

Y1 - 2004

N2 - Five morphologically distinct bacteria isolated from mangrove sediment by enrichment culture, were identified and tested for their ability to degrade dimethyl terephtalate (DMT) and its isomer dimethyl isophthalate (DMI). DMT at a concentration of 98mg/L was degraded completely within 36 days at an initial pH7.0, and two intermediates were identified as mono-methyl terephthalate and terephthalic acid. DMI at a concentration of 220mg/L was degraded within 35 days by a mixed culture, but one of the intermediates was identified as mono-methyl isophthalate and accumulated in the culture. Based on the chemical strctures of intermediates identified, the possible metabolic pathway of DMT was proposed as : DMT→MMT→TA→CO_(2) + H_(2)O. Our results suggested that DMT be easier to be degraded than DMI.

AB - Five morphologically distinct bacteria isolated from mangrove sediment by enrichment culture, were identified and tested for their ability to degrade dimethyl terephtalate (DMT) and its isomer dimethyl isophthalate (DMI). DMT at a concentration of 98mg/L was degraded completely within 36 days at an initial pH7.0, and two intermediates were identified as mono-methyl terephthalate and terephthalic acid. DMI at a concentration of 220mg/L was degraded within 35 days by a mixed culture, but one of the intermediates was identified as mono-methyl isophthalate and accumulated in the culture. Based on the chemical strctures of intermediates identified, the possible metabolic pathway of DMT was proposed as : DMT→MMT→TA→CO_(2) + H_(2)O. Our results suggested that DMT be easier to be degraded than DMI.

M3 - 文章

SN - 1006-687X

VL - 10

SP - 782—785

JO - Chinese journal of applied and environmental biology

JF - Chinese journal of applied and environmental biology

IS - 6

ER -