摘要
采用双氧水在常温常压下对实验室模拟的高浓度含硫废水进行处理,考察了双氧水的浓度、初始p H和反应时间对硫化物去除效果的影响,以及含硫废水去除过程中氧化还原电位（ORP）的控制对氧化产物的影响,分析了固相产物的晶体和表面结构。结果表明,在双氧水浓度为0.147 mol/L、初始p H为6、反应时间为9 min的条件下,废水中硫化物浓度由1 985.46 mg/L降至38.37 mg/L,硫化物去除率达到98.07%,去除效果最佳。在初始ORP值不同的条件下,体系中主要的氧化产物为单质硫和硫酸根;当加入的氧化剂不足时,单质硫和硫酸根随ORP值降低而增加,当加入氧化剂过量时,单质硫和硫酸根随ORP值增加而增加;当体系中ORP值控制在60～178 m V时,单质硫的产量都能达到较为理想的值。X射线衍射（XRD）分析表明,体系中固相产物为环状斜方硫（α-硫）。扫描电子显微镜（SEM）分析表明,单质硫颗粒为表面不光滑的球状颗粒,粒径呈微米级,越小越易聚集在一起。
Treatment of high concentration sulfide wastewater by oxidation with H2O2 was investigated under the conditions of atmospheric pressure and room temperature. The effects of concentration of H2O2,initial p H and reaction time on the sulfide removal efficiency were studied,and the effects of oxidation reduction potential（ ORP） control on the oxidation products were also studied in the process of sulfur-containing wastewater removal. The crystal structure and surface structure of solid phase were analyzed. The results indicated that under the optimal conditions of 0. 147 mol / L of H2O2,initial p H 6 and 9 min,the sulfide concentration could be decreased from 1 985. 46 mg / L to 38. 37 mg / L,and the sulfide removal rate could reach 98. 07%,removal efficiency is best. The main oxidation products were elemental sulfur and sulfate under the condition of different initial ORP.The elemental sulfur and sulfate increased with the decline of ORP when oxidizing agent insufficient,and increased with the rise of ORP when oxidizing agent excessive. The elemental sulfur can achieve ideal value when ORP is 60 ～ 178 m V. The solid phase is annular rhombic sulfur（ α-sulfur） by XRD. The spherical and rough elemental sulfur particles are easy to gather together by SEM and the particle size in microns.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第11期5408-5414,共7页
Chinese Journal of Environmental Engineering
基金
中国石油化工集团科技开发项目(114120)
大学生创新创业计划项目(KSZ13065)
关键词
高浓度含硫废水
双氧水
去除效果
环状斜方硫
high concentration sulfide wastewater
hydrogen peroxide
removal efficiency
annular rhombic sulfur
