作　　者： ; ; ; ;

机构地区： 河北师范大学

出　　处： 《金属矿山》 2007年第2期72-74,96,共4页

摘　　要： 以草酸法改性锰矿为吸附剂吸附模拟废水中的Cu(NH3)42+,研究了pH值、吸附时间、吸附剂投加量对吸附率的影响,测定了吸附等温线,并与天然锰矿进行比较。结果表明:2种锰矿对Cu(NH3)42+的吸附率-pH曲线均呈“M”形,但同一pH下改性锰矿的吸附率明显提高;温度为25℃、pH为7.0时,用量为0.3 g/L的改性锰矿对Cu(NH3)42+的吸附在60 min达到平衡,吸附率为91%;2种锰矿的吸附等温线均符合Langmu ir和Freund lich方程,按Langmuir方程,上述条件下改性锰矿对Cu(NH3)42+的饱和吸附量以Cu2+计为70.4 mg/g,比天然锰矿提高了89.25%。用草酸法改性锰矿处理含Cu(NH3)42+废水具有较好的推广价值。 Oxalid acid-modified manganese ore was used to adsorb Cu （ NH3 ） 4^2＋ from simulated waste water. The effect of pH value, adsorption time, and adsorbent dosage on the adsorption rate was investigated and the adsorption isothermal measured and compared with that when natural manganese ore was used. The experiment results show that the Cu （NH3 ）4^2＋ adsorption rate-pH curves of both ores were of M type, but the Cu （NH3 ）4^2＋ adsorption rate of modified manganese ore was much higher at the same pH value. At a temperature of 5℃, pH of 7.0 and dosage of 0.3 g/L, the adsorp- tion of Cu（ NH3）4^2＋ by modified manganese came to the balance after 60 min, with an adsorption rate of 91%. The adsorption isothermals of both ores corresponded to Langmuir and Freundlich equations. According to Freundlich equation, the saturated adsorption of Cu（ NH3 ）4^2＋ by modified manganese ore under the above conditions was 70.4 mg/g when calculated by Cu^2＋ , 89.25% higher than that by natural ore. Thus, the treatment of waste water containing Cu（ NHs ）4^2＋ by oxalid acid-modified manganese ore is of good popularization value.

关 键 词： 草酸法改性锰矿 天然锰矿 吸附

领　　域： [环境科学与工程]