作　　者： ; ; ; ;

机构地区： 河北师范大学

出　　处： 《金属矿山》 2007年第9期106-108,共3页

摘　　要： 以草酸法改性锰矿和天然锰矿为吸附剂,研究了pH值、吸附时间、投加量对Ni2+吸附去除率的影响,并测定了饱和吸附量。结果表明,Ni2+的吸附-pH曲线呈"S"形特征,对Ni2的吸附去除率随吸附时间的延长和改性锰矿投加量的增加而提高;在25℃、吸附体系pH=7.0、吸附剂浓度为0.2g/L的条件下,草酸法改性锰矿和天然锰矿对Ni2+的饱和吸附量分别为32.3mg[Ni2+]/g和11.6mg[Ni2+]/g,提高了约2.8倍。改性锰矿有望成为处理含Ni2+废水的新型吸附材料。 Oxalic acid-modified manganese ore and natural manganese ore were used as adsorbents for Ni^2 ＋ removal from water. The effect of pH value, adsorption time and adsorbent dosage on the Ni^2＋ removal rate was investigated and the saturated adsorption amount was measured. The results show that Ni^2＋ adsoption-pH curve is of S type and the Ni^2＋ adsoption rate is increased with the increase of the adsorption time and the addition of the modified manganese ore. Under the conditions of 25℃, pH = 0.7 and a adsorbent concentration of 0.2 g/L, modified and natural manganese ores have a saturated adsorption amount for Ni^2＋ of 32.3 and 11.6 mg[ Ni^2＋ ] respectively, with the former＇s adsorption amount being 2.8 times that of the latter. Therefore, modified manganese ore is expected to become a new adsorptive material for treating water containing Ni^2 ＋.

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]