A correlation between the fate and non-extractable residue formation of 14C-metalaxyl and enzymatic activities in soil

被引：10

作者：

Botterweck, Jens ^{[1
]}

Classen, Daniela ^{[1
]}

Zegarski, Thordis ^{[1
]}

Gottfroh, Christian ^{[1
]}

Kalathoor, Roshni ^{[2
]}

Schaeffer, Andreas ^{[1
]}

Schwarzbauer, Jan ^{[2
]}

Schmidt, Burkhard ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Environm Res, D-52074 Aachen, Germany

[2] EMR RWTH Aachen Univ, Inst Petr & Coal, Aachen, Germany

来源：

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES | 2014年 / 49卷 / 02期

关键词：

Metalaxyl; soil; extracellular soil enzymes; non-extractable residues; metabolism; PARTICLE-SIZE FRACTIONS; ORGANIC-MATTER; ENVIRONMENTAL BEHAVIOR; FUNGICIDE METALAXYL; PEROXIDASE-ACTIVITY; MICROBIAL ACTIVITY; INHIBITION; ENZYMES; PESTICIDES; PROTECTION;

D O I：

10.1080/03601234.2014.844600

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Extracellular, oxidative soil enzymes like monophenol oxidases and peroxidases play an important role in transformation of xenobiotics and the formation of organic matter in soil. Additionally, these enzymes may be involved in the formation of non-extractable residues (NERs) of xenobiotics during humification processes. To examine this correlation, the fate of the fungicide C-14 metalaxyl in soil samples from Ultuna (Sweden) was studied. Using different soil sterilization techniques, it was possible to differentiate between free, immobilized, and abiotic (pseudoenzyme-like) oxidative activities. A correlation between the formation of metalaxyl NER and soil organic matter content, biotic activities, as well as extracellular phenoloxidase and peroxidase activities in the bulk soil and its particle size fractions was determined. Extracellular soil-bound enzymes were involved in NER formation (up to 8% of applied radioactivity after 92days) of the fungicide independently from the presence of living microbes and different distributions of the NER in the soil humic subfractions.

引用

页码：69 / 78

页数：10

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