State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
J Environ Sci (China). 2010;22(1):1-6. doi: 10.1016/s1001-0742(09)60067-x.
A treatment unit packed by granular adsorbent of Fe-Mn binary oxide incorporated into diatomite (FMBO(1:1)-diatomite) was studied to remove arsenic from anaerobic groundwater without any pre-treatment or post-treatment. The raw anaerobic groundwater containing 35-45 microg/L of arsenic was collected from suburb of Beijing. Arsenic (III) constituted roughly 60%-80% of the total arsenic content. Approximately 7,000 bed volumes (ratio of effluent volume to adsorbent volume) treated water with arsenic concentration below 10 microg/L were produced in the operation period of four months. The regeneration of FMBO (1:1)-diatomite had been operated for 15 times. In the first stage, the regeneration process significantly improved the adsorption capacity of FMBO (1:1)-diatomite. With increased loading amount of Fe-Mn binary oxide, the adsorption capacity for arsenic decreased 20%-40%. Iron and manganese in anaerobic groundwater were oxidized and adsorptive filtrated by FMBO (1:1)-diatomite efficiently. The final concentrations of iron and manganese in effluents were nearly zero. The continued safe performance of the treatment units proved that adsorbent FMBO (1:1)-diatomite had high oxidation ability and exhibited strong adsorptive filtration.
研究了一种用 Fe-Mn 二元氧化物颗粒吸附剂填充硅藻土（FMBO(1:1)-硅藻土）制成的处理单元，用于在无需任何预处理或后处理的情况下从厌氧地下水中去除砷。原始的厌氧地下水含有 35-45μg/L 的砷，取自北京郊区。砷（III）约占总砷含量的 60%-80%。在四个月的运行期间，处理了约 7000 床体积（出水体积与吸附剂体积之比）的含砷浓度低于 10μg/L 的水。FMBO(1:1)-硅藻土的再生已进行了 15 次。在第一阶段，再生过程显著提高了 FMBO(1:1)-硅藻土的吸附容量。随着 Fe-Mn 二元氧化物加载量的增加，砷的吸附容量降低了 20%-40%。铁和锰在厌氧地下水中被 FMBO(1:1)-硅藻土有效地氧化和吸附过滤。出水铁和锰的最终浓度几乎为零。处理单元的持续安全性能证明吸附剂 FMBO(1:1)-硅藻土具有高氧化能力，并表现出强的吸附过滤性能。
