Biodegradabilities of ethylenediamine-N,N'-disuccinic acid (EDDS) and other chelating agents.
Biodegradabilities of ethylenediamine-N,N'-disuccinic acid (EDDS) and other chelating agents.
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乙二胺-N,N-二琥珀酸 (EDDS) 和其他螯合剂的生物降解性。
DOI：
10.1271/bbb.61.1957
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Takakazu Endo
中科院分区：
文献类型：
--
作者：
R. Takahashi;Naoshi Fujimoto;Masaharu Suzuki;Takakazu Endo
采用活性污泥法测定了螯合剂的生物降解性能。乙二胺四乙酸（EDTA）在驯化100 d后仍保持完整，而丙二胺-N，N '-二琥珀酸（PDDS）和次氮基三乙酸（NTA）分别在驯化5 d和23 d后被生物降解。乙二胺-N，N '-二琥珀酸（EDDS）的光学异构体具有不同的生物降解性：SS-和RS-异构体易被生物降解，而RR-异构体则不易被生物降解。SS-异构体的降解，甚至活性污泥没有驯化。
Biodegradabilities of chelating agents were tested with activated sludge. Ethylenediaminetetraacetic acid (EDTA) remained intact in the effluent even after acclimation for 100 days, but propanediamine-N,N'-disuccinic acid (PDDS) and nitrilotriacetic acid (NTA) were biodegraded after acclimation for 5 and 23 days, respectively. Optical isomers of ethylenediamine-N,N'-disuccinic acid (EDDS) had different biodegradabilities: SS- and RS-isomers were susceptible to biodegradation, but the RR-isomer was resistant. SS-isomer was degraded even by activated sludge without acclimation.