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天然锰矿是一种廉价、易得的除砷矿物材料,为了进一步提高天然锰矿的除砷效果和吸附容量,采用TiCl4对广西桂林天然锰矿进行改性,并对其改性的条件进行优化。实验结果表明最佳的改性条件为：TiCl4浓度为10 mg/L,浸泡时间为18 h,pH=3.05,振荡吸附时间为1 h。与天然锰矿的去除效率（82.95%和77.93%）相比,改性锰矿对As（Ⅲ）和As（Ⅴ）去除率分别可达94.87%和99.31%,相应的饱和吸附量分别为3.48 mg/g和3.27 mg/g,较天然锰矿各自提高了1.25 mg/g和1.21 mg/g。改性锰矿对As（Ⅲ）的吸附符合Freundlich等温吸附模型,对As（Ⅴ）的吸附更符合Langmuir等温吸附模型。“,”Natural manganese ore is a kind of As removal mineral and is low-cost and widely available.In order to enhance its removal efficiency and adsorption quantity of arsenic,this paper adopted TiCl4 to modify natural manganese ore and optimized the conditions of modification.The results showed that the best modification condition was： TiCl4 at a concentration of 10 mg/L,dipping time of 18h,pH 3.05,reaction time of 60 min;under these conditions,the removal rates of As（Ⅲ） and As（Ⅴ） respectively reached 94.87% and 99.31%,compared with natural manganese ore（82.95% and 77.93%）.The saturated adsorption quantity of As（Ⅲ） and As（Ⅴ） reached 3.48 mg/g and 3.27 mg/g,each increasing by 1.25 mg/g and 1.21 mg/g.The adsorption of As（Ⅲ） by modified manganese ore fits the Freundlich adsorption isotherm,while As（Ⅴ） fits the Langmuir adsorption isotherm best.