砷酸钙

There are other metal arsenates, such as those of Fe,Zn,Cu, and Pb, which are less soluble and more stable in the neutral pH region than calcium arsenates or ferric arsenate, but these have not been seriously considered as disposal forms.

还有其他金属砷酸盐，例如那些 Fe、 Zn、 Cu和 Pb，比起砷酸钙或者砷酸铁来，这些物质在中性的 pH 值范围内很少是可溶并且更稳定的，但是这些物质没被以处理的形式认真慎重地考虑过。

The most common methods of removing arsenic from aqueous process streams are by precipitation as arsenic sulfide, calcium arsenate, or ferric arsenate, but it has been suitable for direct disposal to uncontained sites as they will produce leachate containing arsenic.

从水中去除砷是最常用的做法，工艺流程是通过沉淀类似硫化砷、砷酸钙或者砷酸铁，由于会产生含砷的沥出夜，因此这种方法适合用于不限制排放场所的直接处置。

When pH is 10, adsorption time is 30 min, dosage of bone char is 0.6 g/L, the original concentration of As in drinking water is 0.5 mg/L, As removal can reach 95.2%. The adsorption behavior is fitted both with Langmuir and Freundlich isotherm. The adsorption mechanism is supposed to be Ca—OH functional groups combined with anion. And there may occur the co-precipitation between calcium hydrogen arsenate and hydroxylapatite in the aqueous solution, and ions also exchange. The saturation adsorption capacity of As reaches 4.688 mg/g. Indexes of effluent are in good agreement with the WHO stringent drinking water standards (0.01 mg/L).

研究结果表明：在pH=10，吸附时间为30 min和骨炭加入量为0.6 g/L，饮用水砷初始质量浓度为0.5 mg/L时其砷去除率可达95.2%；骨炭吸附砷的行为同时符合Langmuir和Freundlich等温吸附模型；其吸附机理可能是Ca—OH官能团结合HASO4阴离子，并产生砷酸氢钙和羟基磷灰石的共沉淀，另外还存在离子交换作用；吸附柱的饱和吸附容量为4.688 mg/g；出水砷浓度符合世界卫生组织规定饮水砷标准(0.01 mg/L)。

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。

Potassium, natrium determines it is good that use ion chooses electrode indirect method it is better also with indirect method to determine at calcium of direct way;, it is next occasionally phosphor of; of law of azotic arsenic Ⅲ determines use phosphor molybdic acid is ultraviolet law outcome is better it is better with result of law of personal candy kinase that; blood sugar determines; urea determines use Niao enzymatic ultraviolet anhydride of better; flesh uses rate law result enzymatic law outcome is better; albumin determines, it is vanadium acid next alkalescent phosphoric acid of oxidation law; is enzymatic determine outcome of fluid of use AMP amortize is better; amylase determines law of thing of enzymatic standard background and iodic colorimetric law coefficient of variation all bigger, former a bit small, latter of percent of pass is tallish, each lab can try to choose according to his condition.

结论钾、钠测定使用离子选择电极间接法好于直接法；钙测定用间接法也较好，其次是偶氮砷Ⅲ法；磷测定使用磷钼酸紫外法结果较好；血糖测定用己糖激酶法结果较好；尿素测定用脲酶紫外速率法结果较好；肌酐用酶法结果较好；白蛋白测定用溴甲酚绿法较好；胆红素测定用酶法结果好，其次是钒酸氧化法；碱性磷酸酶测定使用AMP缓冲液结果较好；淀粉酶测定酶法底物法和碘比色法变异系数均较大，前者稍小，合格率后者稍高，各实验室可根据自己的条件加以选用。

Solubility and stability of calcium arsenates under different CO2 pressures are studied based on the data of precipitation and solution experiments simulated by PHREEQC program. The result shows that calcium arsenates can dissolve incongruently by the effect of CO2 in high pH（pH〉8. 3）and make their solubility higher. The higher the CO2 pressure is, the lower the acidity of the incongruent dissolution is.

文章摘要：通过沉淀和溶解两方面的实验数据，应用PHREEQC程序模拟了砷酸钙在不同CO2分压条件下溶解度的变化情况，发现环境中的CO2可使砷酸钙盐在酸度较高（pH大于8.3）的条件下发生不一致溶解，使其溶解度升高；CO2分压越大，砷酸钙盐发生不一致溶解的酸度越低；CO2主要影响3：2和5：3的砷酸钙盐，而对4：2砷酸钙盐的影响较小。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新