4种化学药剂对黑臭水体底泥的修复作用

Remediation Effect of Four Chemical Agents on Black and Odorous Water Sediment

我国城镇水体黑臭现象普遍,经过研究分析得出缺氧导致了水体变臭,硫化物存在导致了水体变黑。研究者通过原位修复方法有针对性地处理黑臭水体底泥,本文分析了过氧化钙、硝酸钙、氢氧化钙和过氧化氢4种药剂的修复作用,过氧化钙的强氧化性可以分解降解有机污染物,且可强化硝化反应。硝酸钙表现出更多优势,可降解氨氮、硫化物、可溶性磷、重金属及生物毒性,可有效改善黑臭水体底泥形状。氢氧化钙与过氧化氢修复效果弱于硝酸钙。

Black and odorous phenomenon is widespread in urban,it is concluded that anoxia led to odor,and sulfide led to black in water.The remediation effects of calcium peroxide,calcium nitrate,calcium hydroxide and hydrogen peroxide were analyzed by means of in-situ remediation,the strong oxidation of calcium peroxide could decompose and degrade organic pollutants,and the nitrification reaction could be enhanced.Calcium nitrate showed more advantages,it can degrade ammonia nitrogen,sulfide,soluble phosphorus,heavy metals and biological toxicity,which can effectively improve the shape of black and odorous water sediment.Calcium hydroxide and hydrogen peroxide remediation effect was weaker than calcium nitrate.