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
王春 1马俊斯 1张雪雯 1郭剑浩 2丁洪贵3
作者信息
- 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
- 折叠
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2h,制得活性组分为氧化锌的ZnO/AC催化剂,其比表面积为1 063.45 m2/g,COD去除率高达 71.7%,处理后废水中Zn2+质量浓度增加 99.888 2 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.
Abstract
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 chemi-cal 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 precipi-tated 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 1 063.45 m2/g,the removal rate of COD was up to 71.7％.After the treatment,the concentration of Zn2+in the wastewater increased by 99.888 2 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Key words
activated carbon/catalyst/ozone catalytic oxidation/specific surface area/removal rate of COD/coal chemical industry/high-salt wastewater引用本文复制引用
基金项目
宁夏工业职业学院科学研究重点项目(NGKY202401)
出版年
2024
NETL
NSTL
万方数据