中文摘要：

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Ni^2＋吸附去除率的影响,并测定了饱和吸附量。结果表明,Ni^2＋的吸附-pH曲线呈“S”形特征,对Ni^2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Ni^2＋的饱和吸附量分别为32.3mg[Ni^2＋]/g和11.6mg[Ni^2＋]/g,提高了约2.8倍。改性锰矿有望成为处理含Ni^2＋废水的新型吸附材料。

英文摘要：

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 ＋.