Yang Jian, Wang Su, Lu Zhibo, Yang Jian, Lou Shanjie
State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China.
J Hazard Mater. 2009 Aug 30;168(1):331-7. doi: 10.1016/j.jhazmat.2009.02.024. Epub 2009 Feb 20.
A mixture of converter slag and coal cinder as adsorbent for the removal of phosphorous and other pollutants was studied in the paper. The maximum P adsorption capacity, pH of solution, contact time and initial phosphate concentration were evaluated in batch experiments for the two materials firstly. The data of P sorption were best fitted to Langumir equation, and the maximum adsorption capacities of converter slag and coal cinder were 2.417 and 0.398 mg P/g, respectively. The pH of solutions with converter slag and coal cinder changed dramatically with time and closed to 8 in 8h, and the influence of initial pH on phosphate removal by coal cinder was more significant than by converter slag. Phosphate removal rate by converter slag decreased with increase of initial phosphate concentrations. Subsequently, two flow-through columns (Column 1#, V(converter slag):V(coal cinder)=1:5; Column 2#, V(converter slag):V(coal cinder)=1:3) were operated for the removal of phosphorous and other pollutants from the effluents of a vermifilter for nearly eleven months. Results indicated the average removal efficiency of total phosphorus, dissolved phosphorus, COD and NH(4)(+)-N by Column 1# were 44%, 56%, 31% and 67%, and by Column 2# were 42%, 54%, 24% and 57%, respectively. Column 1# had higher removal efficiency for P and other pollutants.
本文研究了转炉渣和煤渣混合物作为吸附剂去除磷及其他污染物的性能。首先通过批量实验对这两种材料的最大磷吸附容量、溶液pH值、接触时间和初始磷酸盐浓度进行了评估。磷吸附数据最符合朗缪尔方程，转炉渣和煤渣的最大吸附容量分别为2.417和0.398 mg P/g。含有转炉渣和煤渣的溶液pH值随时间变化显著，8小时内接近8，且初始pH值对煤渣去除磷酸盐的影响比对转炉渣更显著。转炉渣对磷酸盐的去除率随初始磷酸盐浓度的增加而降低。随后，运行了两个流通柱（1#柱，V（转炉渣）:V（煤渣）=1:5；2#柱，V（转炉渣）:V（煤渣）=1:3），用于去除蚯蚓滤池出水中的磷及其他污染物，运行时间近11个月。结果表明，1#柱对总磷、溶解性磷、COD和NH(4)(+)-N的平均去除效率分别为44%、56%、31%和67%，2#柱分别为42%、54%、24%和57%。1#柱对磷和其他污染物的去除效率更高。
