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首页> 外文期刊>Wiley Interdisciplinary Reviews: Water >A review of the pesticide MCPA in the land‐water environment and emerging research needs
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A review of the pesticide MCPA in the land‐water environment and emerging research needs

机译：在土地水域环境和新兴研究需求中对农药MCPA的综述

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摘要

Due to its high solubility and poor adsorption to the soil matrix, the post‐emergence herbicide 2‐methyl‐4‐chlorophenoxyacetic acid (MCPA) is susceptible to transport into surface and groundwater bodies, where it can result in compromised water quality and breaches of legislative standards. However, there is still poor understanding of catchment scale dynamics and transport, particularly across heterogeneous hydrogeological settings. While it is known that MCPA degrades under aerobic conditions,negligible breakdown can occur in anaerobic environments, potentially creating a legacy in saturated soils. Fast runoff pathways post application are likely transport routes, but the relative contribution from the mobilization of legacy MCPA from anaerobic zones has yet to be quantified, making the delineation of MCPA sources encountered during monitoring programs challenging. While ecotoxicological effects have been examined, little is known about the interaction of MCPA (and its degradation products)with other pesticides, with nutrients or with colloids, and how this combines with environmental conditions to contribute to multiple stressor effects. We examine the state of MCPA knowledge, using case study examples from Ireland, and consider the implications of its widespread detection in waterbodies and drinking water supplies. Research themes required to ensure the sustainable and safe use of MCPA in an evolving agricultural, social and political landscape are identified here. These include the need to identify mitigation measures and/or alternative treatments, to gain insights into the conditions governing mobilization and attenuation, to map pathways of migration and to identify direct, synergistic and antagonistic ecotoxicological effects.
机译：由于其高溶解度和对土壤基质的吸附差，出现后除草剂2-甲基-4-氯苯甲酸乙酸（MCPA）易于运输到地面和地下水中，这会导致损害立法标准。但是，人们对流域量表动态和运输的了解仍然不足，尤其是在异质水文地质环境中。尽管众所周知，MCPA在有氧条件下降解，但在厌氧环境中可能会忽略不计，可能会在饱和土壤中产生遗产。快速径流途径后申请可能是运输路线，但是从厌氧区动员MCPA动员的相对贡献尚未量化，这使得在监视程序中遇到的MCPA源遇到的划定范围都有挑战性。尽管已经检查了生态毒理学作用，但对MCPA（及其降解产物）与其他农药，养分或胶体的相互作用知之甚少，这如何与环境条件相结合以促进多重压力效应。我们使用爱尔兰的案例研究实例来研究MCPA知识的状态，并考虑其在水体和饮用水供应中广泛发现的含义。在这里确定了确保MCPA在不断发展的农业，社会和政治格局中确保可持续和安全使用MCPA所需的研究主题。其中包括需要识别缓解措施和/或替代治疗方法，以了解有关动员和衰减的条件，以绘制迁移途径并识别直接，协同和拮抗生态毒性效应。

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