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不同菌糠生物炭对水体中Cu2+、Cd2+的吸附性能

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黄菲, 闫梦, 常建宁, 程红艳, 张海波, 王効挙, 曹艳篆, 张国胜, 何小芳, 苏龙. 不同菌糠生物炭对水体中Cu2+、Cd2+的吸附性能[J]. 环境化学, 2020, (4): 1116-1128. doi: 10.7524/j.issn.0254-6108.2019091604
引用本文: 黄菲, 闫梦, 常建宁, 程红艳, 张海波, 王効挙, 曹艳篆, 张国胜, 何小芳, 苏龙. 不同菌糠生物炭对水体中Cu2+、Cd2+的吸附性能[J]. 环境化学, 2020, (4): 1116-1128. doi: 10.7524/j.issn.0254-6108.2019091604
shu
HUANG Fei, YAN Meng, CHANG Jianning, CHENG Hongyan, ZHANG Haibo, OH Kokyo, CAO Yanzhuan, ZHANG Guosheng, HE Xiaofang, SU Long. Adsorption performance of Cu2+ and Cd2+ in water by different biochars derived from spent mushroom substrate[J]. Environmental Chemistry, 2020, (4): 1116-1128. doi: 10.7524/j.issn.0254-6108.2019091604
Citation: HUANG Fei, YAN Meng, CHANG Jianning, CHENG Hongyan, ZHANG Haibo, OH Kokyo, CAO Yanzhuan, ZHANG Guosheng, HE Xiaofang, SU Long. Adsorption performance of Cu2+ and Cd2+ in water by different biochars derived from spent mushroom substrate[J]. Environmental Chemistry, 2020, (4): 1116-1128. doi: 10.7524/j.issn.0254-6108.2019091604
shu

不同菌糠生物炭对水体中Cu2+、Cd2+的吸附性能

  • 1. 山西农业大学资源环境学院, 太谷, 030801;

  • 2. 山西农业大学城乡建设学院, 太谷, 030801;

  • 3. 日本埼玉环境科学国际中心, 埼玉, 347-0115, 日本

    • 通讯作者: 程红艳, E-mail: ndchenghy@163.com ; 
  • 基金项目:

    山西省自然科学基金（201901D111216），山西省国际科技合作项目（201703D421002），山西省煤基重大科技攻关项目（FT2014-03），山西省重点研发（201603D211105），日本学术振兴会科学研究费辅助金（16H05633）和山西省黄土高原食用菌提质增效协同创新中心平台资助.

Adsorption performance of Cu2+ and Cd2+ in water by different biochars derived from spent mushroom substrate

  • 1. College of Resource and Environment, Shanxi Agricultural University, Taigu, 030801, China;

  • 2. College of Urban and Rural Construction, Shanxi Agricultural University, Taigu, 030801, China;

  • 3. Center for Environmental Science in Saitama, Kazo City, Saitama 347-0115, Japan

    • Corresponding author: CHENG Hongyan, ndchenghy@163.com ; 
  • Fund Project: Supported by Natural Science Foundation of Shanxi Province (201901D111216),Shanxi International Science and Technology Cooperation Project (201703D421002), Major Coal-Based Science and Technology Projects in Shanxi Province (FT2014-03), Shanxi Province Key Research and Development (201603D211105),Japan Academic Advocacy Association (16H05633) and Collaborative Innovation Center Platform for Improving Quality and Efficiency of Edible Fungi in Loess Plateau of Shanxi Province.

  • 摘要: 以菌糠废弃物为原料，采用限氧裂解法在500 ℃条件下制备香菇菌糠、猴头菇菌糠和平菇菌糠生物炭（LEBC、HEBC和POBC）.利用SEM、XRD 和 FTIR等方法对吸附剂进行了表征；通过吸附动力学、等温吸附、生物炭酸化实验探究了3种菌糠生物炭去除水溶液中Cu2+、Cd2+的效果及机理.结果表明，在溶液初始pH 2—3时，3种菌糠生物炭对溶液中Cu2+、Cd2+的吸附量急剧增加.LEBC、HEBC、POBC对Cu2+、Cd2+的吸附符合准二级动力学模型，对Cu2+的吸附速率分别为10.15×10-3、7.08×10-3、0.69×10-3 mg·g-1·min-1，对Cd2+的吸附速率分别为6.53×10-3、5.19×10-3、0.26×10-3 mg·g-1·min-1.不同浓度下LEBC、HEBC、POBC对Cu2+的吸附符合Langmuir模型，最大吸附量依次为56.74、11.98、77.32 mg·g-1；而Cd2+的吸附符合Freundlich模型，最大吸附量依次为74.26、36.49、70.2 mg·g-1.LEBC在较短的时间内能达到较大的吸附量，可作为去除水体中Cu2+、Cd2+的优质吸附剂.XRD和FTIR等分析结果表明生物炭对Cu2+、Cd2+的吸附机制包括物理吸附、阳离子-π作用、官能团络合及沉淀.3种生物炭经酸化处理后，对Cu2+、Cd2+的吸附能力显著下降，表明生物炭中碳酸盐引起的Cu2+、Cd2+表面沉淀在吸附过程中起重要作用.
    Abstract: The biochars derived from Lentinus edodes,Hericium erinaceus and Pleurotus ostreatus (LEBC、HEBC and POBC),were prepared by limited oxygen pyrolysis at 500 ℃. The prepared biochars were characterized by SEM, XRD and FTIR. The performance and mechanism of Cu2+ and Cd2+ adsorption onto these three biochars were investigated by the experiments of adsorption kinetics, isothermal adsorption and acidification. The results showed that the adsorption capacities of both Cu2+ and Cd2+ in water increased sharply when the initial pH increased from 2 to 3;The adsorption of Cu2+ and Cd2+ by three kinds of biochars fitted well with pseudo second order kinetic model. The rates of Cu2+ adsorption on LEBC、HEBC and POBC were 10.15×10-3, 7.08×10-3 and 0.69×10-3 mg·g-1·min-1, respectively, while that of Cd2+ were 6.53×10-3, 5.19×10-3 and 0.26×10-3 mg·g-1·min-1, respectively. Adsorption of Cu2+ by LEBC、HEBC and POBC fitted well with Langmuir model, and the calculated maximum adsorption capacity of Cu2+ were 56.74、11.98、77.32 mg·g-1, respectively. However, adsorption of Cd2+ by these biochars fitted well with Freundlich model, and the calculated maximum adsorption capacity of Cd2+ calculated by Langmuir model were 74.26、36.49、70.2 mg·g-1, respectively. The higher adsorption capacity of Cu2+ and Cd2+ could be obtained by LEBC in a short time than other two, thus LEBC can be used as a high-quality adsorbent for removing Cu2+ and Cd2+ in water. The results of XRD and FTIR analysis revealed that the adsorption of Cu2+ and Cd2+ on biochar included four mechanisms: physical adsorption, cation-π interaction, functional group and chemical precipitation. After acidification treatment, the adsorption capacity of Cu2+ and Cd2+ on all biochars decreased significantly, indicating that the surface precipitation of Cu2+ and Cd2+ caused by carbonate in biochars played an important role in the adsorption process.
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  • 收稿日期:  2019-09-16

不同菌糠生物炭对水体中Cu2+、Cd2+的吸附性能

    通讯作者: 程红艳, E-mail: ndchenghy@163.com ; 
  • 1. 山西农业大学资源环境学院, 太谷, 030801;
  • 2. 山西农业大学城乡建设学院, 太谷, 030801;
  • 3. 日本埼玉环境科学国际中心, 埼玉, 347-0115, 日本
  • 收稿日期:  2019-09-16
基金项目:

山西省自然科学基金（201901D111216），山西省国际科技合作项目（201703D421002），山西省煤基重大科技攻关项目（FT2014-03），山西省重点研发（201603D211105），日本学术振兴会科学研究费辅助金（16H05633）和山西省黄土高原食用菌提质增效协同创新中心平台资助.

摘要: 以菌糠废弃物为原料，采用限氧裂解法在500 ℃条件下制备香菇菌糠、猴头菇菌糠和平菇菌糠生物炭（LEBC、HEBC和POBC）.利用SEM、XRD 和 FTIR等方法对吸附剂进行了表征；通过吸附动力学、等温吸附、生物炭酸化实验探究了3种菌糠生物炭去除水溶液中Cu2+、Cd2+的效果及机理.结果表明，在溶液初始pH 2—3时，3种菌糠生物炭对溶液中Cu2+、Cd2+的吸附量急剧增加.LEBC、HEBC、POBC对Cu2+、Cd2+的吸附符合准二级动力学模型，对Cu2+的吸附速率分别为10.15×10-3、7.08×10-3、0.69×10-3 mg·g-1·min-1，对Cd2+的吸附速率分别为6.53×10-3、5.19×10-3、0.26×10-3 mg·g-1·min-1.不同浓度下LEBC、HEBC、POBC对Cu2+的吸附符合Langmuir模型，最大吸附量依次为56.74、11.98、77.32 mg·g-1；而Cd2+的吸附符合Freundlich模型，最大吸附量依次为74.26、36.49、70.2 mg·g-1.LEBC在较短的时间内能达到较大的吸附量，可作为去除水体中Cu2+、Cd2+的优质吸附剂.XRD和FTIR等分析结果表明生物炭对Cu2+、Cd2+的吸附机制包括物理吸附、阳离子-π作用、官能团络合及沉淀.3种生物炭经酸化处理后，对Cu2+、Cd2+的吸附能力显著下降，表明生物炭中碳酸盐引起的Cu2+、Cd2+表面沉淀在吸附过程中起重要作用.

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