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首页> 外文会议>1998 Joint Conference on the Environment, 1998, Mar 31-Apr 1, 1998, Albuquerque, NM >Removal of Metals and Radionuclides Using Apatite and Other Natural Sorbents
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Removal of Metals and Radionuclides Using Apatite and Other Natural Sorbents

机译：使用磷灰石和其他天然吸附剂去除金属和放射性核素

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This study demonstrated that natural and synthetic phosphate minerals have a high affinity for metal oxyanions including As, Se, U, Am and Pu in simulated ground water. The natural phosphate minerals were not as effective as the synthetic apatites and tri-calcium phosphate. However one of them, bone char, had excellent sorption capacity for U, Am and Pu. The studies described here were necessarily of a scoping nature and did not consider all of the variables which might affect performance of a treatment process. Other variables which could affect contaminant removal include: 1) alternative oxidation states for those contaminants with multiple oxidation states, 2) the effects of sorption kinetics and mass transfer rates on column operation, and 3) possible competition for sorption sites by other constituents including naturally occurring organic material. At present, and in the quantities used in this study the synthetic apatites are too expensive (>dollar10/g) for use as disposable sorbents for wastewater treatment. However, bone char is readily available at low cost and appears to have many characteristics which make it suitable it suitable for one-time use followed by direct disposal.
机译：这项研究表明，天然和合成的磷酸盐矿物质对模拟地下水中的金属氧阴离子（包括砷，硒，铀，砷和Am）具有很高的亲和力。天然磷酸盐矿物质不如合成磷灰石和磷酸三钙有效。但是，其中一种是骨炭，对U，Am和Pu具有极好的吸附能力。此处描述的研究必定是范围界定的研究，并未考虑可能影响治疗过程执行的所有变量。其他可能影响污染物去除的变量包括：1）具有多个氧化态的那些污染物的替代氧化态； 2）吸附动力学和传质速率对色谱柱操作的影响； 3）其他成分可能会竞争吸附位，包括天然出现的有机物质。目前，以本研究中使用的数量计算，合成磷灰石太昂贵（> 10美元/克），无法用作废水处理的一次性吸附剂。但是，骨炭很容易以低成本获得，并且似乎具有许多特性，使其适合一次性使用，然后直接处理。

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