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首页> 外文期刊>Journal of environmental science and health >Effect on herbicide adsorption of organic forestry waste products used for soil remediation
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Effect on herbicide adsorption of organic forestry waste products used for soil remediation

机译：土壤修复用有机林废弃物对除草剂吸附的影响

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Organic soil amendments can be useful for improving degraded soil, but this increase in organic matter (OM) may influence adsorption of herbicides subsequently applied to the treated soil, even though the particle size of amendments and their nature differ from typical soil OM. In this study, a batch equilibrium method was used to measure adsorption of five herbicides following application to two organic media, wood pulp and sawdust, comparing these with two cropping soils. Herbicide adsorption, quantified by distribution coefficients (k(d)), was much higher in the two organic media than in the cropping soils. The increases in adsorption were strongly correlated to the percentage of organic carbon. When the k(d) was normalized to adsorption coefficients corrected for OM content (k(oc)), variation in results between the media was greatly reduced, indicating that OM is an important factor influencing adsorption in these media. The results of this study suggest that herbicides will be less effective when applied to soils in which sawdust and wood pulp have been added. Using organic amendments to remediate soil will increase adsorption of pesticides, reducing their bio-availability and efficacy, but also reducing their tendency to leach into root zones of deep-rooted crops and into groundwater.
机译：有机土壤改良剂可用于改善退化的土壤，但是有机物（OM）的这种增加可能会影响除草剂的吸附，随后除草剂的颗粒尺寸及其性质与典型的土壤OM不同，这种除草剂随后会应用于处理过的土壤。在这项研究中，采用批平衡法测量了五种除草剂在两种有机介质（木浆和锯末）上的吸附量，并将它们与两种耕作土壤进行了比较。用分布系数（k（d））量化的除草剂吸附在两种有机介质中要比在耕种土壤中高得多。吸附的增加与有机碳的百分比密切相关。当将k（d）归一化为针对OM含量校正的吸附系数（k（oc））时，介质之间结果的差异大大降低，表明OM是影响这些介质中吸附的重要因素。这项研究的结果表明，将除草剂应用于已添加锯末和木浆的土壤时效果会更差。使用有机改良剂来修复土壤将增加农药的吸附，降低其生物利用度和功效，但同时也减少了其渗入根深蒂固的农作物根系和地下水的趋势。

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