| 含硫废水受控氧化及单质硫团聚过程研究 |
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| 引用本文： | 王兵,陈丹丹,李永涛,任宏洋,王丹,林奇.含硫废水受控氧化及单质硫团聚过程研究[J].环境科学学报,2016,36(8):2893-2898. |
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| 作者姓名： | 王兵 陈丹丹 李永涛 任宏洋 王丹 林奇 |
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| 作者单位： | 1. 西南石油大学化学化工学院, 成都 610500;2. 四川省环境保护油气田污染防治与环境安全重点实验室, 成都 610500,西南石油大学化学化工学院, 成都 610500,1. 西南石油大学化学化工学院, 成都 610500;2. 四川省环境保护油气田污染防治与环境安全重点实验室, 成都 610500,1. 西南石油大学化学化工学院, 成都 610500;2. 四川省环境保护油气田污染防治与环境安全重点实验室, 成都 610500,西南石油大学化学化工学院, 成都 610500,1. 西南石油大学化学化工学院, 成都 610500;2. 中石油安全环保技术研究院, 大连 116000 |
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| 基金项目： | “十二五”国家科技支撑计划项目（No.2011BAC06B05）；中国石油化工集团科技开发项目（No.114120） |
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| 摘 要： | 采用过氧化氢在常温常压下对模拟含硫废水进行受控氧化,探讨了受控氧化过程对单质硫收率的影响,并对氧化过程中固相产物的形态特性进行了研究.结果表明,在过氧化氢投加量为9 m L·L-1、初始p H为6、反应时间为10min条件下,将反应体系氧化还原电位(ORP)控制在(30±5)m V时能较好实现含硫废水的受控氧化,此时单质硫收率达76.35%,当体系ORP由(-50±5)m V升高至(50±5)m V时,副产物S2O2-3收率显著下降,由26.54%下降至5.32%.X射线衍射分析表明,氧化过程中的固相产物主要为正交晶系斜方硫;扫描电子显微镜分析表明,液相中的单质硫由多个极小的颗粒聚集而成,其粒径由纳米级逐渐增大至微米级.同时,通过向反应体系中加入分散剂证明了单质硫颗粒增大的主要原因是颗粒间发生了团聚.
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| 关 键 词： | 含硫废水 受控氧化 单质硫 颗粒团聚 |
| 收稿时间： | 2015/9/25 0:00:00 |
| 修稿时间： | 2015/10/12 0:00:00 |
The controlled oxidation and sulfur agglomeration process in sulfide wastewater treatment |
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| WANG Bing,CHEN Dandan,LI Yongtao,REN Hongyang,WANG Dan and LIN Qi.The controlled oxidation and sulfur agglomeration process in sulfide wastewater treatment[J].Acta Scientiae Circumstantiae,2016,36(8):2893-2898. |
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| Authors: | WANG Bing CHEN Dandan LI Yongtao REN Hongyang WANG Dan and LIN Qi |
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| Institution: | 1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500;2. Oil and Gas Field Pollution Control and Environmental Security Key Laboratory of Environmental Conservation in Sichuan, Chengdu 610500,School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500,1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500;2. Oil and Gas Field Pollution Control and Environmental Security Key Laboratory of Environmental Conservation in Sichuan, Chengdu 610500,1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500;2. Oil and Gas Field Pollution Control and Environmental Security Key Laboratory of Environmental Conservation in Sichuan, Chengdu 610500,School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500 and 1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500;2. Security Environmental Protection Technology Research Institute of PetroChina, Dalian 116000 |
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| Abstract: | The controlled oxidation of sulfide wastewater by using hydrogen peroxide was studied under the normal pressure and temperature. The effects of oxidation redox potential(ORP) on the recovery rate and morphologies of sulfur are investigated with 9 mL·L-1 peroxide, initial pH 6, and 10 min of reaction time. The recovery rate of sulfur increased with the improved ORP, and reached 76.35% when the ORP was about (30±5) mV. Further increased ORP leads to the reduction of sulfur recovery rate. The yield of by-product S2O32- decreased from 26.54% to 5.32% significantly when ORP increased from (-50±5) mV to (50±5) mV. The orthorhombic of sulfur was proved by using X-ray diffraction (XRD).Aggregation of sulfur particles obtained from the oxidation processes observed by using scanning electrical microscope (SEM). And the size of aggregation increased from nanometer to micrometer with the increase of reaction time. The aggregation of sulfur reduced with the addition of dispersant, which indicates the aggregation causing the increasing of particle size. |
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| Keywords: | sulfide wastewater controlled oxidation elemental sulfur particles agglomeration |
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