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摘要:
珍珠岩经高能球磨活化，并在球磨活化过程中添加Ca（OH）2以及CaCl2共磨，制备新型硅酸盐矿物材料。使用XRF、XRD、SEM/EDS等表征分析，以及Cd（Ⅱ）的吸附容量等对该吸附剂进行定性和定量的性能评价。结果表明，经过600 r/h的共磨后，吸附剂对Cd（Ⅱ）吸附量高达1 372.70 mg/g，同时，吸附后溶液的pH值为中性或弱碱性，比传统碱沉淀法显著降低。所制备的新型材料和制备工艺环境友好，原料廉价易得，为珍珠岩及其他硅酸盐矿物的活化利用提供了新思路。
Abstract:Co-grinding perlite with calcium hydroxide and calcium chloride by high-energy ball mill was conducted to prepare novel silicate material. The adsorption characteristics of heavy metal by the new material were studied qualitatively and quantitatively by a set of analytical methods of XRF、XRD、SEM/EDS and evaluation of the adsorption capacity for Cd (Ⅱ). The results show that the adsorption capacity of Cd(Ⅱ) may reach 1 372.70 mg/g with the grinding time of 1h and the stirred speed of 600 r/min. Meanwhile, the final pH of solution after reaction is neutral or weak alkaline. It was greatly decreased compared with the common alkali precipitation. The preparing process and the product are environment-friendly, providing a new idea to activate and utilize perlite and other silicate ore tailings.
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Key words:
- perlite /
- high-energy ball mill /
- Cd(Ⅱ) /
- adsorbent
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表 1 珍珠岩样品化学成分
Table 1. Chemical compositions of perlite
成分 SiO2 Al2O3 CaO Fe2O3 K2O Na2O Other 含量/% 70.93 13.00 0.99 0.73 4.59 2.66 7.10 
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