摘要
在“双碳”背景下,实现绿色高效的污染物治理更具重要意义。工业废水处理过程中,硬度的去除主要通过酸碱调节联合投加沉淀剂的方式实现,存在药剂用量大、化学污泥多、操作强度高等诸多问题。电化学除硬技术节能高效、环境友好,具有重要的开发价值。采用高温碳化-碱活化天然木材的方法制备微通道碳材料,对其进行了形貌和官能团的表征,并以微通道碳材料为阴极构建电化学反应器,考察了相关条件参数对模拟废水中钙硬度去除效果的影响。结果表明:在电压6 V、HRT=180 s、pH=7、n(HCO_(3)^(-))/n(Ca^(2+))=1.2的优化条件下,出水钙硬度为32.4 mg·L^(-1),去除效率达到83.8%,在水中硬度去除方面展示出较高的效率,为推进电化学除硬技术发展提供了有益参考。
In the context of "double carbon", it’s important to realize green and efficient pollution control. In the process of industrial wastewater treatment, hardness removal is mainly achieved by chemical reagent combined with acid-alkali adjustment method. It has many problems such as more chemicals, more chemical sludge production and more workload.The electrochemical method is an efficient, energy-saving and environmentally friendly technology for hardness removal,and it is valuable for further development. In this paper, microchannel carbon material was prepared by two-step method including high-temperature carbonization and alkaline activation, and the morphology, structure and functional groups were characterized. Then the carbon material was used as cathode to construct electrochemical reactor, and the main conditions were investigated. Under the optimal experimental conditions(applied potential =6 V, HRT=180 s, pH=7,n(HCO_(3)^(-))/n(Ca^(2+))=1.2), calcium hardness of the effluent and removal efficiency were 32.4 mg·L^(-1)and 83.8% respectively.The results showed that the microchannel carbon material was efficient as cathode and could provide reference for promoting the development of electrochemical technology for hardness removal.
作者
马传军
程彬彬
MA Chuan-jun;CHENG bin-hili(Sinopec Dalian Research Institute of Petroleum and Petrochemicals,Dalian Liaoning 116045,China;Sinopec Refinery Department,Beijing 100728,China)
出处
《当代化工》
CAS
2022年第6期1336-1339,1347,共5页
Contemporary Chemical Industry
基金
中国石油化工集团公司资助项目,中安联合煤化高盐废水零排放处理技术研究(项目编号:318014-2)。
关键词
微通道碳材料
电化学
钙硬度
模拟废水
Microchannel carbon material
Electrochemistry
Calcium hardness
Simulated wastewater
