DF-665 重金属沉淀剂

DF-665 是一种含有硫代反应产物的专利无机液体，可在很宽的 pH 范围内使用，以去除废水和地下水中的有毒重金属。

DF-665 用于将废水和地下水中的重金属沉淀至痕量水平。DF-665 特别适用于满足严格的监管限制和降低处置成本。

好处

• 低痕量浓度： DF-665 将重金属沉淀至痕量水平，低于其他化学处理系统可达到的水平。在大多数情况下，金属浓度降低到十亿分之一。
• 低毒性： DF-665 的毒性比有机硫化合物（氨基甲酸酯）低200 倍，因此对员工和环境的危害较小（LD 50-Daphnia Magna：370 毫克/升）。
• 成本效益： DF-665 的价格与其他特种沉淀化学品相比具有竞争力。此外，低剂量率通常会为用户带来显着的成本节约。化学沉淀的成本明显低于脱矿质、超滤或反渗透技术。
• 宽 pH 范围： DF-665 可在很宽的 pH 范围内使用，使其适用于许多不同的操作条件。
• 低硫化氢生成：硫化合物可以在酸性 pH 条件下生成硫化氢。DF-665 是专门为防止硫化氢排放超过允许限值而配制的。
• 混合废物： DF-665 在螯合剂、表面活性剂和中性盐存在下可有效沉淀重金属。重金属的组合可以同时沉淀。
• 低浸出性：金属硫化物沉淀通常会通过 TCLP 测试。因此，许多废物可归类为无害废物并在副标题 D 填埋场处置。
• 高过滤性： DF-665 产生致密的沉淀物，易于过滤和脱水。这降低了处置和运营成本。
• 污泥减量： DF-665用于中和前沉淀重金属时，有毒污泥量大大减少，适合再冶炼回收。
• 污染去除： DF-665 能够去除废水中的有机和无机污染物。这包括矿物油和石蜡。

• 设备成本低：在现有废水处理系统中使用 DF-665 只需要最少的额外设备和对现有设备的修改。

适用

• 电镀废水
• 电池厂废水
• 受污染的地下水
• 城市污水
• 灰渗滤液
• 金属表面处理废水
• 炼油厂废水
• 酸性采矿废水
• 垃圾渗滤液
• 船厂废水

物理数据（典型）
外观：黄绿色至琥珀色液体
密度：1.125
pH：11.35
气味：氨
水中溶解度：完全
蒸气压：20.8mbar @ 20°C
冰点：-5.5°C
F沸点：103°C

DF-665 is a patented inorganic liquid containing thio reaction products that can be used over a wide pH range to remove toxic heavy metals from wastewater and groundwater.

DF-665 is used to precipitate heavy metals from wastewater and groundwater to trace levels. DF-665 is especially suited for satisfying difficult regulatory limits and reducing disposal costs.

Benefits

• Low Trace Concentrations: DF-665 will precipitate heavy metals to trace levels lower than is achievable with other chemical treatment systems. In most cases, metal concentrations are reduced to parts per billion.
• Low Toxicity: DF-665 is 200 times less toxic than organic sulfur compounds (carbamates) and therefore less hazardous to employees and the environment (LD 50-Daphnia Magna: 370 mg/l).
• Cost Effective: DF-665 is competitively priced with other specialty precipitation chemicals. Moreover, low dosage rates often result in significant cost savings to the user. Chemical precipitation is significantly less costly than demineralization, ulrafiltration, or reverse osmosis technologies.
• Wide pH Range: DF-665 can be used over a wide pH range making it useful in many different operating conditions.
• Low Hydrogen Sulfide Generation: Sulfur compounds can generate hydrogen sulfide in acid pH conditions. DF-665 is specially formulated to prevent hydrogen sulfide emissions from exceeding allowable limits.
• Mixed Wastes: DF-665 is effective in precipitating heavy metals in the presence of chelating agents, surfactants, and neutral salts. Combinations of heavy metals can be precipitated simultaneously.
• Low Leachability: Metal sulfide precipitates will generally pass the TCLP test. Therefore many wastes can be classified as nonhazardous and disposed in Subtitle D landfills.
• High Filterability: DF-665 produces a dense precipitate that is easy to filter and dewater. This reduces disposal and operating costs.
• Sludge Reduction: When DF-665 is used to precipitate heavy metals before neutralization, the quantity of toxic sludges is greatly reduced and suitable for recycling by re-smelting.
• Pollution Removal: DF-665 is capable of polishing organic and inorganic pollutants from wastewater. This includes mineral oils and paraffins.
• Low Equipment Cost: Only minimal additional equipment and modifications to existing equipment are needed to use DF-665 in existing wastewater treatment systems.