煅烧-碱溶法制粉煤灰类沸石吸附剂及其在处理含铅废水中的应用

粉煤灰吸附性能研究是当前环境科学领域中的一个研究热点 ,但原状粉煤灰的吸附效果不理想。本文报道的用煅烧 -碱溶法制得类沸石吸附剂的比表面积为 112 .6m2 / g、孔隙率为 83 .1% ,分别是改性前的 40 .2 2和 1.67倍。用此类沸石吸附剂来处理浓度为 2 0 0mg/L的模拟含铅废水 ,去除率为 84.87% ,吸附容量为 3 3 .94mg/ g ,分别是改性前的3 1.13和 3 1.42倍 ,处理效果优于市售一级活性炭。并用 0 .1mol/L的HCl溶液和饱和NaCl溶液再生此吸附剂 ,解吸率达到了 98%以上 ,此再生的类沸石吸附剂处理含铅废水的去除率也达到了 83 %以上

Manufacture of zeolite-like sorbent with fly ash by the method of calcination-alkali dissolve and application of treatment in wastewater containing lead

Study of fly ash adsorptive performance is a researchful hot in the field of environmental science, but adsorptive effect of original fly ash is not ideal.Ratio surface area of zeolite-like sorbent manufactured by the method of calcinations-alkali dissolve is 112.6 m 2/g and its hole gap rate is 83.1%.Compared with original fly ash, ratio surface area and hole gap rate of zeolite-like sorbent increase 44.22 and 1.67 times respectively. The removal rate and adsorptive capacity of lead achieve to 84.87%,33.94 mg/g respectively in the treatment of imitated wastewater of lead(concentration: 200 mg/L),they are 31.13,31.42 times of these of original fly ash respectively. The effect is better than that of alive character in the market.The sorbent is reused by being soaked in the solution of 0.1 mol/L HCl and summative NaCl, and the separating absorption rate exceeds 98%. The removal rate exceeds 83% in the treatment of wastewater containing lead with the reused zeolite-like sorbent.