Abstract:In order to reduce the production cost and control the environmental pollution caused by waste acid and alkali discharge, the process experiments of waste acid and alkali recycling and the relevant impacts on the properties of zeolites synthesized from fly ash were carried out. Under the similar experimental conditions, three recycling ratio 1:1,2:1,3:1were tested The physical-chemical characteristics of products was analyzed through SEM, XRD and BET. The results show that waste acid-zeolites synthesized from fly ash (WAC-ZFA) and waste alkali-zeolites synthesized from fly ash (WAL-ZFA) has the similar physical-chemical properties of zeolites synthesized from fly ash (ZFA), sharp diffraction peaks and a large number of pore structure characterization on the surface observed as well. Compared with ZFA, the BET of WAC-ZFA is slightly lowered, but WAL-ZFA increased obviously. The waste acid & alkali recycling ratio have different effects on the removal of ammonia. Based on these results, the recovery ratio of waste acid and alkali should be less than 1:1and 3:1 respectively.
骆其金, 谌建宇, 王振兴, 罗隽, 庞志华, 林方敏. 酸碱回收对粉煤灰合成沸石性能的影响[J]. 中国环境科学, 2014, 34(9): 2217-2222.
LUO Qi-Jin, CHEN Jian-Yu, WANG Zhen-Xing, LUO Juan, PANG Zhi-Hua, LIN Fang-Min. Research of recycling of waste acid or alkali and its impacts on the properties of zeolites synthesized from fly ash. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(9): 2217-2222.