摘要
通过对多种有机物如草酸、柠檬酸、柠檬酸钠、酒石酸钾钠、草酸铵、柠檬酸三铵、酒石酸、EDTA分别存在下,对水体铬(Ⅲ)去除影响对比,选择酒石酸、草酸、柠檬酸和柠檬酸钠作为共存有机物,氢氧化钙或氢氧化钠做沉淀剂,三氯化铝或三氯化铁为共沉淀剂,研究水体铬(Ⅲ)去除情况,并对铬去除及影响机理进行了探讨。结果表明,所选有机物的存在,不同程度地影响水体中三价铬的去除,三氯化铝和三氯化铁的存在,有助于水体中三价铬在有机物存在情况下的去除,且多数情况下,三氯化铝的共沉淀效果好于三氯化铁。Ca(OH)2、NaOH的最佳用量为理论用量的150%,且Ca(OH)2的沉淀效果好于NaOH。
The efficiency of chromium removal from water was studied by alkaline precipitators such as sodium hydroxide（NaOH）,calcium hydroxide（Ca（OH）2）,and co-precipitators such as ferric chloride（FeCl3）,aluminum chloride（AlCl3）.Four organic compounds of tartaric acid,oxalic acid,citric acid,sodium citrate,were selected as co-organic compounds as a result of comparison removal efficiency of chromium in presence of oxalic acid,citric acid,sodium citrate,potassium-sodium tartrate,ammonium oxalate,ammonium citrate,tartaric acid,or EDTA.The result indicated that the efficiency of chromium removal from water decreased in different degree in the presence of above organic compounds,FeCl3 and AlCl3 can be in favor of chromium removal and AlCl3 better than FeCl3 under most condition.150% of theoretics dosage is the best addition of Ca（OH）2 and NaOH,the precipitation efficiency of Ca（OH）2 btter than NaOH.
出处
《水处理技术》
CAS
CSCD
北大核心
2010年第7期46-49,共4页
Technology of Water Treatment
基金
天津科技大学科学研究基金资助(20080213)
天津科技大学引进人才科研启动基金资助(20070421)
天津科技大学理学院科技创新课题
关键词
铬污染
水体污染
水体修复
chromium pollution
water pollution
water remediation
