Kim Insu, Lee Minhee, Wang Sookyun
Korea Basic Science Institute, Division of Earth and Environmental Science, 804-1 Yangcheongri, Ochangeup, Cheongwongun, Chungbuk, Republic of Korea.
Department of Earth Environmental Sciences, Pukyong National University, 599-1 Daeyondong, Namgu, Busan 608-737, Republic of Korea.
J Environ Manage. 2014 Dec 15;146:568-574. doi: 10.1016/j.jenvman.2014.05.042. Epub 2014 Sep 8.
Batch, column, and pilot scale feasibility experiments for a bio-sorption process using a bio-carrier (beads) with dead Bacillus drentensis sp. in polysulfone polymer were performed to remove heavy metals in groundwater originating from an acid mine drainage (AMD). For batch experiments, various amounts of bio-carrier each containing a different amount of dead biomass were added in artificial solution, of which the initial heavy metal concentration and pH were about 10 mg/L and 3, respectively. The heavy metal removal efficiencies of the bio-carrier under various conditions were calculated and more than 92% of initial Pb and Cu were found to have been removed from the solution when using 2 g of bio-carriers containing 5% biomass. For a continuous experiment with a column packed with bio-carriers (1 m in length and 0.02 m in diameter), more than 98% of Pb removal efficiency was maintained for 36 pore volumes and 1.553 g of Pb per g of bio-carrier was removed. For the pilot scale feasibility test, a total of 80 tons of groundwater (lower than pH of 4) were successfully treated for 40 working days and the removal efficiencies of Cu, Cd, Zn, and Fe were maintained above 93%, demonstrating that one kg of bio-carrier can clean up at least 1098 L of groundwater in the field.
进行了批次、柱式和中试规模的可行性实验，以研究使用含有死的德伦特芽孢杆菌的生物载体（珠子）在聚砜聚合物中进行生物吸附过程去除源于酸性矿山排水（AMD）的地下水中重金属的效果。在批次实验中，将不同量且含有不同量死生物质的生物载体添加到人工溶液中，该溶液中重金属初始浓度约为10 mg/L，pH约为3。计算了各种条件下生物载体对重金属的去除效率，发现当使用2 g含有5%生物质的生物载体时，溶液中超过92%的初始铅和铜被去除。对于装有生物载体的柱（长度1 m，直径0.02 m）进行的连续实验，在36个孔隙体积内铅的去除效率保持在98%以上，每克生物载体去除了1.553 g铅。对于中试规模的可行性测试，在40个工作日内成功处理了总共80吨（pH低于4）的地下水，铜、镉、锌和铁的去除效率保持在93%以上，表明1 kg生物载体在现场至少可以净化1098 L地下水。
