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周四，赞比亚否认六个月前其铜矿开采区域发生的酸液泄漏仍构成严重健康风险。此前一天，美国大使馆以污染广泛为由，限制美国官员前往该地区。

此次酸液泄漏发生在2月，当时一座由中国运营的铜加工厂尾矿坝决堤，5万立方米酸性泥浆涌入附近河流。

事故发生后，这个南部非洲国家的政府已采取措施，用石灰降低受影响区域的酸度，并表示无需恐慌。政府发言人科尼利厄斯·姆韦特瓦在新闻发布会上称：“实验室结果显示，pH（酸度）水平已恢复正常，重金属浓度也在稳步..

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