abandoned pitとは 意味・読み方・使い方

To provide a granular adsorbent for selectively removing arsenic-containing ion from water containing iron ion and the arsenic-containing ion at pH less than 4, which is derived from water in a pit flowing as spring water in an abandoned mine or rain water penetrating a sulfur mine flowing as groundwater and forms a subsidiary stream in a small amount, and to provide a method for purifying the water.例文帳に追加

休廃止鉱山内で湧水する坑内水又は硫黄鉱山に染み込んだ雨水が地下水となって流れ込む水量の少ない支流等の鉄イオン及び砒素を含有するイオンを含むｐＨ４未満の水から砒素を含有するイオンを選択的に除去する粒状吸着剤及び該水を浄化する方法の提供。 - 特許庁