实验室含铬废水处理初步研究  

Preliminary Study on Treatment of Chromium-Containing Wastewater in Laboratory

作　　者：曹旺祥 储倩莹 马嫱[1,2] Cao Wangxiang;Chu Qianying;Ma Qiang(Tan Kah Kee College,Xiamen University;Key Laboratory of Estuarine Ecological Security and Environmental Health,Fujian Province University,Zhangzhou 363105,China)

机构地区：[1]厦门大学嘉庚学院 [2]河口生态安全与环境健康福建省高校重点实验室,福建漳州363105

出　　处：《中国资源综合利用》2019年第8期15-18,共4页China Resources Comprehensive Utilization

摘　　要：本文以研究含铬废水的最佳处理工艺条件为主,在常温下利用Fe2+的还原性和过量的NaOH与含铬废水的反应机制进行探究,控制不同的试验因素,即投加(Fe2+/Cr6+)比值、反应pH、共沉淀pH、反应时间和共沉淀时间,分析其对铬去除率的影响。试验结果表明,在最佳处理工艺条件下,铬的去除率超过99.63%,废水处理后能够达标排放。利用这些最佳条件来处理实验室含铬原废水,处理后的Cr6+浓度为0.98 mg/L,去除率高达99.87%,做到了低浓度排放,最大化减少污染。This paper focuses on the best treatment process conditions for chromium-containing wastewater.At room temperature,the reductive properties of Fe2+and the reaction mechanism of excess NaOH and chromium-containing wastewater were investigated.Different experimental factors were controlled,namely(Fe2+/Cr6+)ratio,reaction pH,coprecipitation pH,reaction time and coprecipitation time,and the effect on the removal rate of chromium was analyzed.The test results show that under the optimal treatment conditions,the removal rate of chromium exceeds 99.63%,and the wastewater can be discharged after treatment.Using these optimal conditions to treat the laboratory’s chromiumcontaining raw wastewater,the treated Cr6+concentration is 0.98 mg/L,and the removal rate is as high as 99.87%,which achieves low concentration discharge and minimizes pollution.

关 键 词：投加比值 PH 反应时间 共沉淀时间 沉淀物的表征分析 

分 类 号：X703.1[环境科学与工程—环境工程]