Влияние изменения климата на подвижность меди (Cu) и свинца (Pb) в образцах прибрежных отложений в озерах, подверженных засухе (оз. Богазичи)
Ключевые слова:
озеро Богазичи, осадки, последовательная экстракция BCR, мобилизация металлов, воздействие изменения климата, тяжелые металлы (Cu, Pb)Аннотация
Изучается мобилизация меди (Cu) и свинца (Pb) в образцах осадка, собранных из оз. Богазичи (Тузла), водно-болотные угодья которого составляют площадь 562 га на юго-западе Турции. Рассматриваются переменные окружающей среды, связанные с изменением климата, в частности температура, соленость и pH, влияют на подвижность этих металлов в осадке. Образцы осадка разделялись на четыре фракции с использованием метода последовательной экстракции Бюро по стандартизации Британского сообщества (BCR), а концентрации металлов анализировались методом ICP-OES. Результаты свидетельствуют, что Cu и Pb присутствуют преимущественно в окисляемой и остаточной формах, в то же время как Pb в подвижных фракциях легко высвобождается в водную среду, Cu демонстрирует более широкий диапазон подвижности в отличие от Pb. Медь, содержащаяся в окисляемой и остаточной фракциях, также может высвобождаться в воду при изменяющихся условиях окружающей среды. Результаты изучения показали, что Pb показывает сложное поведение, зависящее как от pH, так и от солености, тогда как мобилизация Cu сильно зависит от температуры, но относительно независима от pH. Таким образом, итоги исследования позволяют предположить, что изменения окружающей среды, вызванные изменением климата, могут оказывать большее влияние на мобилизацию меди, чем свинца в отложениях оз. Богазичи.
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