摘要
采用合成水化硅酸钙进行污水除磷试验,以模拟污水为研究对象,考察了接触时间、Ca2+浓度、初始pH值、干扰离子等因素对除磷效果的影响,在利用水化硅酸钙回收实际污水中磷的试验发现,在处理8 h后除磷量达到101 mg/g,折合P2O5含量超过常用的水溶性磷肥过磷酸钙,且产物经酸处理后将快速释磷,在1 h后磷释放率接近100%,显示该材料能富集回收实际污水中的磷,具有较好的应用前景。
Taking simulation wastewater as the research object,a test on phosphorus removal from waste-water by synthesized calcium silicate hydrate was carried out,and the influences of contact time,Ca2＋ concentra-tion,initial pH value,interfering ion and some other factors on phosphorus removal were investigated.The results of the test on phosphorus recovery from actual wastewater by calcium silicate hydrate showed that,after 8 hours of reaction,the amount of phosphorus recovery reached 101 mg/g;the phosphorus content of the wastewater,converted into P2O5,was larger then that of the common water-soluble phosphate fertilizer： calcium super-phosphate;furthermore,phosphorus was released rapidly after the product had been treated by acid,and the release rate was nearly 100% within 1 hour,which indicated that,the said material could enrich and reclaim phosphorus from actual wastewater,and would have good application prospect.
出处
《工业用水与废水》
CAS
2011年第4期51-54,共4页
Industrial Water & Wastewater
基金
十一五重大科技专项(22008ZX07101-010-03)
关键词
水化硅酸钙
污水
磷回收
calcium silicate hydrate
wastewater
phosphorus recovery
