砷酸铅

As Paul Robbins reports in "Lawn People"(2007), the first pesticide popularly spread on lawns was lead arsenate, which tended to leave behind both lead and arsenic contamination.

如同保罗·罗宾斯在《草地人》（2007）中的报道，第一种广泛喷洒的杀虫剂砷酸铅会导致砷和铅的残留污染。

According to the description of their physical and chemical features in ancient documents, they are undoultedly two different minerals, that is, lead chromate should be As2S2 while arsenic disulfide should be PbCrO.

根据古文献中对石黄与雄黄的物理和化学特性的描述，它们无疑是两种不同的矿物，雄黄应是鸡冠石，即二硫化二砷(As2S2)，石黄应是属于铬合物的铬酸铅。

For example, white stains have MgO, hydrotalcid, alumian, containingborates calcium、 dionide, zinc oxide, arsenic, antimony oxide, silver, cerium compounds; red stains have basic lead chromate, lead kind of uranium yellow and oxymatrine of lead uranium, uranium, ND salt Cassius A50, red iron oxide and molysite CD、CU、 se reaumuria, electrolyic, MN, and so on.

例如，不黑色着色剂有氧化镁、碳酸镁、氧化铝、硼酸钙、氧化钛、氧化锌、砷酸、氧化锑、金属银、铈化合物；白色着色剂有碱式铬酸铅、铅种铀黄和氧化铀、铀酸铅、钕盐卡修斯紫金、赤氧化铁和铁盐、镉硒赤、氧化锰、锰等。

One of the most insoluble arsenic compounds is lead chloroarsenate, Pb5(AsO4)3Cl,( the mineral form being mimetite) which has been studied in detail.

最难以解决的砷化合物之一是铅含氯砷酸盐， Pb5(AsO4)3Cl ，已经被详细研究。

The present invention adopts ammonium salt solution as leach, and adopts the liquid-phase oxidation activating agent formed from surfactant sodium ligno-sulfonate or sodium dodecyl sulfonate, liquir phase oxidation catalyst Cu(2+) and sulfur-extracting agent tetrachloroethylene to implement quick leaching process of sulkfide mineral in gas-liquid-solid three-phase reactor, all the sulfurs contained sulfide in mineral powder can be converted into elementary sulfur and sulfuric acid radical, the contained zinc, copper, nickel, cobalt, lead, cadmium and silver can be changed into soluble salt, and fed into leach or remained in the leaching out slag.

本发明涉及的有色金属硫化矿的铵盐液相氧化直接浸出方法，其特征在于：采用铵盐溶液作浸出剂，采用由表面活化剂木质磺酸钠或十二烷基磺酸钠，液相氧化催化剂Cu2+、萃硫剂四氯乙烯组成的液相氧化活化剂，在气液固三相反应器内，实现硫化矿的快速浸出过程，矿粉中各种硫化物所含的硫转变为单质硫和硫酸根，所含的锌、铜、镍、钴、铅、镉、银等变成可溶性盐类进入浸出液中或留在浸出渣中，消除传统流程中二氧化硫，硫化氢，氮氧化物及含砷含汞含铅等有毒烟气的排放。

Besides, entirely avoiding environmental protection of noxious Pb and As, so CR method is a benign environment method, where arsenic product is in the form of copper arsenate, tin product is the concentrate containing 70% Sn by use of adding NH4Cl to enrich tin in washing solution.

环境保护效果好，彻底消除了火法存在的铅毒和砷害，而且砷以用途广泛的砷酸铜形式产出，而锡在CR过程中添加适量氯化铵使锡富集于水洗液从而分离和富集成含Sn 70%的锡精矿。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。