The compound CaCO3 is less expensiv

The compound CaCO3 is less expensive than CaHPO4 and previous studies have shown
that carbonate effectively immobilizes Cd. CaHPO4 and CaCO3 were combined and tested
to immobilize the metals in the soil. Table 5 shows the leachable metal concentrations
following CaHPO4/CaCO3 stabilization. The concentrations were effectively reduced with
5% CaHPO4 and 10% CaCO3; the Cd and Pb leachable concentrations were lower than regulatory limits. The most effective combination dosewas 8%CaHPO4/10% CaCO3. Generally,increasing the CaHPO4 dosage reduced the more leachable metal concentrations after 14 days of stabilization. The soil pH remained at about 7.4. Therefore, the CaHPO4/CaCO3 combination was employed to stabilize the contaminated soil. The cost was less than when using only CaHPO4, and the soil pH change was moderate

結果 (中文) 1:

复合 CaCO3 是比 CaHPO4 便宜和先前的研究表明碳酸盐岩有效固定不变的外贸 CaHPO4 和 CaCO3 进行联合测试固定土壤中的重金属。表 5 显示了该可地浸金属的浓度下面的 CaHPO4/CaCO3 稳定。浓度在有效降低5 %cahpo4 和 CaCO3 10%；镉、 铅的可浸出浓度均低于监管限制。最有效的组合 dosewas 8%CaHPO4/10%CaCO3。一般来说，增加 CaHPO4 剂量减少更可地浸金属浓度经过 14 天的稳定。土壤 ph 值保持在约 7.4。因此，采用 CaHPO4/CaCO3 组合稳定被污染的土壤。小于时使用只有 CaHPO4 的成本是和土壤 ph 值的变化是适度

結果 (中文) 3:

复方碳酸钙比磷酸氢钙和以前的研究已经表明，便宜
碳酸盐岩有效固定CD。磷酸氢钙和碳酸钙结合测试
固定土壤中的金属。表5显示了浸金属浓度
以下磷酸氢钙/碳酸钙稳定。有效浓度与
5%磷酸氢钙和碳酸钙降低10%；浸出浓度均低于监管限制的镉和铅。最有效的组合剂量8%磷酸氢钙/ 10%碳酸钙。一般来说，提高磷酸氢钙用量减少更浸金属浓度经过14天的稳定。土壤pH值保持在7.4左右。因此，磷酸氢钙/碳酸钙相结合可以稳定土壤污染。成本低于使用磷酸氢钙时，与土壤pH值的变化是温和的