| 黄芷嫣,胡志霖,廖子聪,刘娟,崔理华,黄柱坚.MgFe类水滑石法强化混凝深度处理猪场尾水及混凝污泥特性研究[J].农业环境科学学报,2017,36(11):2332-2342. |
| MgFe类水滑石法强化混凝深度处理猪场尾水及混凝污泥特性研究 |
| Advanced treatment of piggery wastewater via enhanced coagulation with Mg/Fe layered double hydroxides and analysis of the coagulation sludge properties |
| 投稿时间：2017-04-14 |
| DOI：10.11654/jaes.2017-0563 |
| 中文关键词: MgFe类水滑石 强化混凝 猪场尾水 重金属 抗生素 |
| 英文关键词: Mg/Fe layered double hydroxides enhanced coagulation piggery wastewater heavy metals antibiotic |
| 基金项目:国家自然科学基金项目（51509093）；广东省科技计划项目（2017A020216025）；广东省自然科学基金项目（2016A030310456）；广东省水利科技创新项目（2015-15）；广州市科技计划项目（201508020073）；广东省环境污染控制与修复技术重点实验室开放基金资助项目（2016K0014）；华南农业大学省级大学生创新创业训练计划项目（201610564065） |
| 作者 | 单位 | E-mail | | 黄芷嫣 | 华南农业大学资源环境学院, 广州 510642
广东省环境污染控制与修复技术重点实验室, 广州 510275 | | | 胡志霖 | 华南农业大学资源环境学院, 广州 510642
广东省环境污染控制与修复技术重点实验室, 广州 510275 | | | 廖子聪 | 华南农业大学资源环境学院, 广州 510642
广东省环境污染控制与修复技术重点实验室, 广州 510275 | | | 刘娟 | 华南农业大学资源环境学院, 广州 510642
广东省环境污染控制与修复技术重点实验室, 广州 510275 | | | 崔理华 | 华南农业大学资源环境学院, 广州 510642
广东省环境污染控制与修复技术重点实验室, 广州 510275 | | | 黄柱坚 | 华南农业大学资源环境学院, 广州 510642
广东省环境污染控制与修复技术重点实验室, 广州 510275 | zjhuang@scau.edu.cn |
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| 中文摘要: |
| 为了深度处理经二级生化处理后的猪场尾水，采用MgFe类水滑石法强化混凝猪场尾水。考察了不同pH值、Mg与Fe摩尔配比[n（Mg：Fe）]等混凝条件对猪场尾水常规指标以及其中微量重金属[Zn2+、Cu2+、Cr（Ⅵ）]和兽用抗生素（磺胺甲基异恶脞，SMX）等去除效果的影响，并利用X射线衍射（XRD）、扫描电镜（SEM）和傅立叶转换红外（FTIR）等技术对混凝污泥特性进行分析，制备了催化材料，进行了混凝污泥资源化利用初探。结果表明：当猪场尾水初始pH>6.5时，TP、浊度和Cr（Ⅵ）去除率分别在95%、80%和35%以上。当初始pH值进一步调节至大于8.0时，MgFe类水滑石对Zn2+和Cu2+去除率可达85%以上，对SMX去除率在75%以上；Mg与Fe摩尔配比对各水质指标去除效果影响不大。混凝污泥主要形成的矿物相有类水滑石与磷酸铁矿物。通过煅烧混凝污泥制备高级氧化催化剂，发现在相同过硫酸氢钾（PMS）投加量的条件下，700℃限氧热解混凝污泥制得的催化剂比同条件下利用人工合成MgFe类水滑石制得的催化剂具有更高的催化活性。研究结果可为养猪处理废水与混凝污泥资源化利用研究提供支持。 |
| 英文摘要: |
| After the second stage of biochemical treatment, piggery wastewater still contains a high level of contaminants, and further processing is required.The effects of initial pH and Mg/Fe molar ratio on the removal of water contaminants were investigated in this study. The coagulation precipitates were analyzed via X-ray diffraction(XRD), scanning electron microscopy(SEM), and Fourier transform infrared spectroscopy(FTIR), and the coagulation sludge was cycled as a kind of catalyst for the first step of resource utilization. The results showed that when the initial pH value of the piggery wastewater was above 6.5, the removal rates of TP and Cr(Ⅵ) and the reduction of turbidity reached over 95%, 35%, and 80%, respectively. When the pH value was higher than 8.0, the removal rates of Zn2+ and Cu2+ reached over 85%, and the removal rate of SMX could reach over 75%. However, the Mg/Fe molar ratio had little effect on coagulation. Analysis of the coagulation sludge showed that mainly layered double hydroxides and iron phosphate minerals were formed. At last, we prepared catalysts with coagulation sludge under the conditions of 700℃ and limited oxygen and found that with the same amount of potassium monopersulfate(PMS) addition, catalysts prepared with coagulation sludge had higher catalytic activity than those prepared with Mg-Fe LDHs. This finding shows the great potential of the obtained coagulation sludge in resource utilization. |
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