文档介绍：Cd2+-Adsorption Properties in Wastewater of
Composite Modified Maifan Stone
Guan Denggao1,2, Sun Chuanmin1,Sun Yao1 Lin Jinghui2, Chen Shanhua2, Long Jianping2
1. college of earth sciences 2. college of materials and chemistry & chemical engineering
chengdu university of technology chengdu university of technology
Chengdu, China Chengdu, China
guandenggao@ ******@cdut.
Abstract—A new kind of Cd2+adsorption material was prepared montmorillonite [17], are widely used in heavy metal ion
using maifan stone posite modification with chemical and waste water treatment because they possess good adsorption
heat treatment methods. The modified maifan stones were and ion exchange capacity.
characterized by SEM and EDS. Effects of the modified maifan
stone content, contact time and the initial pH of the solution on Maifan stone is a type of altered or weathered granitic rock
the adsorption of Cd2+ were studied. The research results show as and widely spread in China. In recent years, maifan stone has
follows: 1) posite modified maifan stone was prepared gained much attention as a very important adsorbing material
with heat treatment for 1 h at 340 ℃ after the chemical dipping in heavy metal ion waste water treatment researches [18]. But
for 24 h with 2 mol/L CaCl2 solutions; 2) posite modified the adsorption property of natural maifan stone is rathe