灼烧对河道底泥中磷迁移转化特性的影响  

Influence of Ignition on Migration and Transformation of Phosphorus in River Sediments

作　　者：李大鹏[1] 句立展 黄勇[1] 李伟光[3] 

机构地区：[1]苏州科技学院环境科学与工程系,江苏苏州215011 [2]哈尔滨市城市内河建设发展有限公司,黑龙江哈尔滨150070 [3]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《中国给水排水》2008年第11期89-92,共4页China Water & Wastewater

基　　金：国家"十五"重大科技专项(2003AA601070);江苏省高校自然科学基础研究项目(07KJD610196)

摘　　要：研究了灼烧河道底泥过程中磷的环境浸出行为以及磷的潜在活性和生物有效性。结果发现,当灼烧温度为150℃时,溶解性活性磷(SRP)的累计浸出量最大(300.05mg/kg),而灼烧温度为750℃时,SRP的累计浸出量最小(184.33mg/kg)。灼烧强化了底泥中NaOH-nrP和BD-P向NH4Cl-P、Al-P、Ca-P的转化。随着灼烧温度升高,这种强化作用明显增加。底泥灼烧温度不同,生物有效磷的形成量也不同。当灼烧温度>550℃时,生物有效磷的形成受到明显抑制;当灼烧温度为750℃时,生物有效磷形成量下降了43.44%。A lab-scale study was carried out to investigate the dissolution, potential mobility and bioavailability of phosphorus in ignited fiver sediments. The results show that the accumulative release of soluble reactive phosphorus （SRP） is maximum （300.05 mg/kg） by ignition at 150 ℃, while the accu-mulative release of SRP is minimum （ 184.33 mg/kg） at 750 ℃. The transformation from NaOH-nrP and BD-P to NH4C1-P, A1-P and Ca-P in sediments is favored by ignition. This enhancement is increased obviously with the temperature increase. The formation of bioavailable phosphorus varies with temperatures. When the temperature is above 550℃, the formation of bioavailable phosphorus is inhibited evidently. At 750℃, the amount of bioavailable phosphorus is reduced by 43.44% compared with that of raw sediments.

关 键 词：底泥灼烧 生物有效磷 迁移转化 

分 类 号：X522[环境科学与工程—环境工程]