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The influences of different organic fractions in refuse on the sorption and bioavailability of dibutyl phthalate

机译：垃圾中不同有机组分对邻苯二甲酸二丁酯吸附和生物利用度的影响

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摘要

The structure and composition of the organic matter in landfilled refuse might have an influence on the migration and transformation of dibutyl phthalate (DBP). Humic acid (HA) and humin (HU) were separated from aged-refuse to determine the influences of different organic fractions in the refuse on the sorption and bioavailability of DBP. The sorption kinetics and isotherms for the sorption of DBP to HA, HU, and whole refuse were determined. The results showed that the sorption constants (K) and nonlinearities decreased in the order HU > whole refuse > HA. The HA had lower K values than did the other refuse fractions, and it retarded the biodegradation of DBP over a short degradation period (48 h). Increasing the amount of HA present caused the amount of DBP that was biodegraded to decrease significantly, 81.3% of the DBP sorbed to HA being degraded in the original experiments after 48 h but 21.8% of the DBP being degraded when three times as much HA was used. Similar results were not observed when the amount of HU used was changed. These findings suggest that HA plays an important role in the biodegradation of DBP adsorbed by refuse.
机译：垃圾填埋场中有机物的结构和组成可能会对邻苯二甲酸二丁酯（DBP）的迁移和转化产生影响。从老化垃圾中分离腐殖酸（HA）和腐殖质（HU），以确定垃圾中不同有机成分对DBP吸附和生物利用度的影响。测定了DBP对HA，HU和整个垃圾的吸附动力学和等温线。结果表明，吸附常数（K）和非线性下降的顺序为HU>整个垃圾> HA。该HA的K值低于其他垃圾组分，并且在较短的降解时间（48小时）内阻止了DBP的生物降解。 HA含量的增加导致被生物降解的DBP量显着减少，最初的实验中，吸附到HA的DBP的81.3％在48小时后被降解，而当HA的三倍时，DBP的21.8％被降解。用过的。当改变HU用量时，未观察到类似结果。这些发现表明HA在垃圾吸附的DBP的生物降解中起重要作用。

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