摘要
用宜昌、海口、保康等地磷块岩对水溶液中镉离子的吸附实验结果表明 ,影响吸附效果的主要因素有介质的酸度 ,作用时间 ,初始Cd2 +浓度和样品用量。在 pH =6,作用时间为 15min ,初始Cd2 +浓度为 3 0mg/L的实验条件下 ,宜昌硅质磷块岩对镉离子的去除率可达 98% ,去除容量为 4 .5mg/ g(样品 ) ,吸附效果最好 ,海口的效果次之 ,而保康钙质磷块岩的效果最差。上述差异可能与这些磷块岩的矿物成分和结晶化学特性之间的差异有关。
Phosphorites from the Yichang, Haikou and Baokang areas were used for remediation of aqueous cadmium (Ⅱ) ion. The experimental results showed that in the condition of pH=6, action time=15 min, initial Cd concentration=30 mg/L, the cadmium (Ⅱ) attenuation by Yichang siliceous phosphorite is 98% and attenuated Cd is 4.5 mg/g (sample). The respective numbers for Baokang calcareous phosphorites are much lower, and those for Haikou phosphorites are intermediate. Owing to the differences in sorption mechanism, the properties for cadmium remediation by phosphorite are different from those for lead remediation.
出处
《矿物学报》
CAS
CSCD
北大核心
2001年第3期406-408,共7页
Acta Mineralogica Sinica
基金
湖北省重点科技项目 ( 981P0 2 13)