Manganese Oxide(Mn2O3) as Adsorbent for Cadmium.
Manganese Oxide(Mn2O3) as Adsorbent for Cadmium.
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氧化锰（Mn2O3）作为镉的吸附剂。
DOI：
10.2965/jswe.23.116
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Atsushi Uchida
中科院分区：
文献类型：
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作者：
H. Koyanaka;S. Koyanaka;Ruilu Liang;Atsushi Uchida
研究了Mn_2O_3对水溶液中镉的吸附。研究结果表明：（1）在温度为300 °C，溶液pH=7，镉浓度为1 × 100 mg· l-1的条件下，Mn_2O_3对镉的吸附富集能力为23.2 × 46.6mg · g-1。Mn 2 O3的比表面积为50 m2· g-1。(2)加入0.5mol · l-1HNO 3可将镉从Mn_2O_3上洗脱下来，Mn_2O_3对镉的吸附能力基本恢复到原来的水平。(3)本研究尝试用Mn_2O_3（1g）去除日本秋田吉野矿山废水（0.117mg · l ~（-1）Cd）中的Cd。结果表明，处理后的出水在2.5h内镉浓度降至0.001mg · l-1以下。
In the present study, the adsorption of cadmium on Mn2O3 in aqueous solution was investigated. The Mn2O3 was prepared by heating MnCO3 at 300∼800°C for 4.5 hours.The findings of the present study are as follows:(1) The Mn2O3 showed the ability to adsorb and concentrate cadmium from aqueous solution to levels reaching 23.2∼46.6mg · g-1 under the following conditions : heating temperature=300°C, solution pH=7, and cadmium concentration=1∼100mg · l-1. The surface area of the Mn2O3 was 50m2 · g-1.(2) The cadmium was eluted from the Mn2O3 by adding 0.5mol · l-1 HNO3, and the adsorption ability of the Mn2O3 recovered to nearly the previous level.(3) We attempted to remove cadmium from a sample (1l) of mining effluent (0.117mg · l-1 Cd) from the Yoshino mine in Akita prefecture, Japan using Mn2O3 (1g). The results showed that the cadmium concentration of the treated effluent decreased to under 0.001mg · l-1 in 2.5 hours.