贵州兴仁滥木厂铊矿床环境地球化学研究

A Research into Environmental Geochemistry of Lanmuchang Thallium Deposit in Xingren of Guizhou Province

滥术厂铊矿区是一个天然铊污染和铊中毒的典型实例。矿床开发利用导致铊进入表生环境，由于含铊岩矿石的风化淋滤作用，使溶解铊进入地表水体、土壤、植物和人体生态链，故尔引起铊环境污染和慢性铊中毒出现。根据矿区水中铊含量将矿区水分为四种类型：①安全饮用水（＜1×10－9）；②可饮用水［（1～5）×10－9］；③非饮用水［（5～10）×10－9］；④污染水（＞10×10－9）。建议中国饮用水中铊含量1×10－9定为安全即无毒害标准。

Lanmuchang thallium ore area in Xingren, Guizhou is a typical example of natural thallium polluted and poisoned places. The exploitation and utilization of the deposit has led to thallium into supergene environment .With Tl-beraing rocks and ores to be weathered and leached, dissolved thallium goes into surface water body,soil, plant and human ecological environ-ment, resulting in thallium pollution and chronical poisoning to the environment.Based on thallium content in water, the water of the ore area can be grouped into four types: 1. safe drinking water (< 1 × 10 - 9); 2. drinking water [ (1 - 5) ×10-9]; 3. non-drinking water [ (5 - 10 ) × 10-9 ]; 4.polluted water (> 10 ×10 -9). Thallium content of 1 × 10 - 9 is proposed to be used as a standard for safe drinking water of China