基于活性炭与生物炭的水体原位修复技术中试探讨

Study on the Technique of In-situ Restoration of Water Based on Activated Carbon and Biochar

中试试验选择生物炭与活性炭为吸附材料,在白洋淀某水域铺设炭材料,探索其对上覆水磷酸盐(SRP)、总磷(TP)的吸附效果,探讨活性炭、生物炭在水体原位修复过程中的机理与作用。测试结果表明,生物炭(铺设厚度为6~8cm)组上覆水TP、SRP浓度低于空白对照组,对上覆水TP、SRP具有较好的吸附效果;活性炭(铺设厚度为6~8cm)组上覆水TP浓度低于空白对照组,对上覆水TP具有较好的吸附效果。基于2种不同类型碳质材料较高的比表面积、较大的阳离子交换量,中试区上覆水磷酸盐浓度呈现逐渐降低趋势。中试试验对于探索炭材料在水体原位修复中降低污染物浓度的潜在市场及规模化应用具有参考价值与指导意义。

In the pilot test,biochar and activated carbon were selected as adsorbent materials,the carbon material was laid in a water area of Baiyangdian Lake to explore its adsorption effect on the overlying water phosphate (SRP) and total phosphorus (TP),the mechanism and role of activated carbon and biochar in the in-situ remediation process of water were discussed.The results showed that the concentration of TP and SRP on the surface of the biochar (laying thickness of 6-8 cm) was lower than that of the blank control group,and it had better adsorption effect on the overlying water TP and SRP.The concentration of TP on the activated carbon (laying thickness of 6-8 cm) was lower than that of the blank control group,and it had a good adsorption effect on the overlying water TP.Based on the high specific surface area and large cationic exchange capacity of the two types of carbon materials,the phosphate concentration of overlying water in the pilot area showed a gradual decreasing trend.Pilot test has reference value and guiding significance for exploring the potential market and large-scale application of carbon materials in the in-situ remediation of water.