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微生物硫氧化-硫还原回收垃圾焚烧飞灰中Cu和Zn

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张瑞昌, 邱会玲, 王婷, 冯帆, 李梦婷. 微生物硫氧化-硫还原回收垃圾焚烧飞灰中Cu和Zn[J]. 环境工程学报, 2019, 13(5): 1220-1227. doi: 10.12030/j.cjee.201810089
引用本文: 张瑞昌, 邱会玲, 王婷, 冯帆, 李梦婷. 微生物硫氧化-硫还原回收垃圾焚烧飞灰中Cu和Zn[J]. 环境工程学报, 2019, 13(5): 1220-1227. doi: 10.12030/j.cjee.201810089
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ZHANG Ruichang, QIU Huiling, WANG Ting, FENG Fan, LI Mengting. Recovery of Cu and Zn from waste incineration fly ash through integrated sulfur bio-oxidation and bio-reduction[J]. Chinese Journal of Environmental Engineering, 2019, 13(5): 1220-1227. doi: 10.12030/j.cjee.201810089
Citation: ZHANG Ruichang, QIU Huiling, WANG Ting, FENG Fan, LI Mengting. Recovery of Cu and Zn from waste incineration fly ash through integrated sulfur bio-oxidation and bio-reduction[J]. Chinese Journal of Environmental Engineering, 2019, 13(5): 1220-1227. doi: 10.12030/j.cjee.201810089
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微生物硫氧化-硫还原回收垃圾焚烧飞灰中Cu和Zn

  • 1.

    河南科技大学化工与制药学院，洛阳 471023

  • 基金项目:

    国家自然科学基金资助项目 41601520

    河南科技大学大学生研究训练计划(SRTP)项目 2018140 国家自然科学基金资助项目(41601520)

    河南科技大学大学生研究训练计划(SRTP)项目(2018140)

Recovery of Cu and Zn from waste incineration fly ash through integrated sulfur bio-oxidation and bio-reduction

  • 1.

    School of Chemical Engineering & Pharmacy, Henan University of Science and Technology, Luoyang 471023, China

  • Fund Project:

  • 摘要: 利用正交实验确定了飞灰中重金属生物淋滤浸出的最佳条件：pH 4.0、飞灰固体浓度1%和硫粉添加量5 g·L-1。在此条件下，飞灰中Cu、Zn、Pb和Cd的去除率分别为47.3%、72.9%、12.4%和75.8%。通过氮气吹脱硫酸盐生物还原产生的H2S，在pH为2.2和4.0时可分别以硫化物沉淀形式选择回收生物淋滤产生的淋滤液中的Cu和Zn。X射线能谱分析发现，沉淀得到的铜和锌纯度分别达90.6%和99.9%。X射线衍射分析铜沉淀的晶体类型主要为靛铜矿(CuS)、蓝辉铜矿(Cu7S4)和雅硫铜矿(Cu9S8)；锌沉淀主要为纤维锌矿(ZnS)。综合分析，微生物硫氧化-硫还原可以以纯净硫化物形式回收飞灰中47.3%的Cu和64.0%的Zn。
    Abstract: In this study, the optimum conditions for heavy metal bioleaching from waste incineration fly ash, being determined through the orthogonal test, were following: pH 4.0, fly ash solid concentration of 1% and sulfur concentration of 5 g·L-1. Under these conditions, the removal rates of Cu, Zn, Pb and Cd in fly ash were 47.3%, 72.9%, 12.4% and 75.8%, respectively. For H2S produced from the bio-reduction of N2 stripped sulfate, it could be used to selectively recover Cu and Zn in the leachate through forming sulfide precipitation at pH 2.2 and 4.0, respectively. The X-ray energy spectrum (EDS) analysis indicated that the purity of copper or zinc in its own precipitate was 90.6% and 99.9%, respectively. XRD analysis confirmed that copper precipitate consisted of covelline (CuS), anilite (Cu7S4) and yarrowite (Cu9S8), and zinc precipitate primarily consisted of wurtzite (ZnS). Ultimately, 47.3% of Cu and 64.0% of Zn in the fly ash could be recovered as pure sulfides through the integrated sulfur bio-oxidation and bio-reduction.
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  • 刊出日期:  2019-06-03

微生物硫氧化-硫还原回收垃圾焚烧飞灰中Cu和Zn

  • 1. 河南科技大学化工与制药学院，洛阳 471023
基金项目:

国家自然科学基金资助项目 41601520

河南科技大学大学生研究训练计划(SRTP)项目 2018140 国家自然科学基金资助项目(41601520)

河南科技大学大学生研究训练计划(SRTP)项目(2018140)

摘要: 利用正交实验确定了飞灰中重金属生物淋滤浸出的最佳条件：pH 4.0、飞灰固体浓度1%和硫粉添加量5 g·L-1。在此条件下，飞灰中Cu、Zn、Pb和Cd的去除率分别为47.3%、72.9%、12.4%和75.8%。通过氮气吹脱硫酸盐生物还原产生的H2S，在pH为2.2和4.0时可分别以硫化物沉淀形式选择回收生物淋滤产生的淋滤液中的Cu和Zn。X射线能谱分析发现，沉淀得到的铜和锌纯度分别达90.6%和99.9%。X射线衍射分析铜沉淀的晶体类型主要为靛铜矿(CuS)、蓝辉铜矿(Cu7S4)和雅硫铜矿(Cu9S8)；锌沉淀主要为纤维锌矿(ZnS)。综合分析，微生物硫氧化-硫还原可以以纯净硫化物形式回收飞灰中47.3%的Cu和64.0%的Zn。

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