活性炭负载锌催化剂的制备及其处理煤化工废水的试验研究  

An experimental study on preparation of zinc-loaded activated carbon catalyst and its performance in coal chemical wastewater treatment

作　　者：王春 马俊斯 张雪雯 郭剑浩 丁洪贵 WANG Chun;MA Junsi;ZHANG Xuewen;GUO Jianhao;DING Honggui(Ningxia Industrial Vocational College,Yinchuan 750011,China;Coal Chemical Industry Technology Research Institute of China ENERGY Group Ningxia Coal Industry Co.,Ltd.,Yinchuan 750411,China;Quality Measurement Testing Center of China ENERGY Group Ningxia Coal Industry Co.,Ltd.,Yinchuan 750411,China)

机构地区：[1]宁夏工业职业学院,银川750011 [2]国家能源集团宁夏煤业有限责任公司煤炭化学工业技术研究院,银川750411 [3]国家能源集团宁夏煤业有限责任公司质量计量检测中心,银川750411

出　　处：《工业用水与废水》2024年第3期45-49,55,共6页Industrial Water & Wastewater

基　　金：宁夏工业职业学院科学研究重点项目(NGKY202401)。

摘　　要：为实现煤化工高盐废水水质处理效能的提升,以宁夏生产的煤制活性炭为载体,采用直接浸渍法、沉淀-煅烧法2种负载方法,选取Zn元素作为催化剂的活性组分,制备了用于臭氧氧化降解工艺用催化剂,考察了催化剂对宁夏宁东地区煤化工高盐废水中COD去除情况的探究。结果表明:将活性炭与浓度为0.4 mol/L的氯化锌溶液按照m(活性炭)∶V(溶液)=1∶3的比例混合,完全沉淀后,在氮气环境保护下,在恒定300℃的温度下煅烧2 h,制得活性组分为氧化锌的ZnO/AC催化剂,其比表面积为1063.45 m2/g,COD去除率高达71.7%,处理后废水中Zn^(2+)质量浓度增加99.8882 mg/L,高比表面积有利于发挥物理吸附与化学催化的协同作用,提高活性炭基催化剂的催化性能。该臭氧催化剂催化效果显著,可用于煤化工高盐废水中有机物的去除。In order to improve the treatment efficiency of high-salt wastewater from coal chemical industry,two loading methods namely direct impregnation method and precipitation-calcinations method were adopted to prepare catalyst for ozone oxidation degradation process with coal-based activated carbon produced in Ningxia as the carrier,and zinc as the active component.The removal of COD in the high-salt wastewater from coal chemical industry of Ningdong area of Ningxia was investigated,the results showed that the activated carbon was mixed with 0.4 mol/L zinc chloride solution at the ratio of m(activated carbon):V(solution)=1∶3,and then precipitated completely,under nitrogen protection,ZnO/AC catalyst with active component of zinc oxide was prepared by calcinations at a constant temperature of 300℃ for 2 h,the specific surface area of the catalyst was 1063.45 m^(2)/g,the removal rate of COD was up to 71.7%.After the treatment,the concentration of Zn^(2+)in the wastewater increased by 99.8882 mg/L,the existence of high specific surface area was beneficial to the synergy of physical adsorption and chemical catalysis,and to improve the catalytic performance of activated carbon-based catalyst.The said ozone catalyst has remarkable catalytic effect and can be used for the removal of organic matters from high-salt wastewater of coal chemical industry.

关 键 词：活性炭 催化剂 臭氧催化氧化 比表面积 COD去除率 煤化工 高盐废水 

分 类 号：X703.5[环境科学与工程—环境工程]