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中国农学通报

中国农学通报 ›› 2019, Vol. 35 ›› Issue (10): 82-88.doi: 10.11924/j.issn.1000-6850.casb18110048

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

生物质炭对水溶液中Pb2+的吸附性能研究

郜雅静1, 李建华2, 卢晋晶2, 靳东升2, 张敏1, 郜春花3   

  1. 1.山西大学生物工程学院;2.山西省农业科学院农业环境与资源研究所;3.山西省农科院农业环境与资源研究所
  • 收稿日期:2018-11-13 修回日期:2019-02-13 接受日期:2019-02-19 出版日期:2019-04-03 发布日期:2019-04-03
  • 通讯作者: 郜春花
  • 基金资助:
    山西省重点研发计划重点项目“主要农业生态区域农业面源污染关键技术研究与集成示范”(201603D21110-1)；山西省重点研发计划项目 “工矿废弃地重金属污染土壤生物修复技术”(201603D421044)；2017 年山西省财政支农项目“农田生态环境的监测与土壤污染阻控技术的研究” (2017ZZCX-13)。

Biochar: Adsorption Property to Pb2+ in Aqueous Solution

  • Received:2018-11-13 Revised:2019-02-13 Accepted:2019-02-19 Online:2019-04-03 Published:2019-04-03

PDF (PC)

298

摘要： 针对山西省土壤Pb2 +污染问题，为了选择一种环保及可循环利用的生物质材料。以农业废弃物小麦秸秆和花生壳制备而成的生物质炭为材料，通过平衡吸附法确定影响吸附的最佳条件。结果表明，当Pb2+初始浓度为200 mg/L时，生物质炭添加量为8 g/L，pH值3~7，25℃条件下震荡360 min，为最适吸附条件，吸附效果最好，吸附量达24.85 mg/g，去除率达99.38%。该种生物质炭对Pb2 +的吸附符合二级动力学方程和Langmuir等温吸附模型，R2分别达0.9994和0.9985。本研究表明，用小麦秸秆和花生壳制备而成的生物质炭在一定条件范围内对Pb2+具有良好的去除作用。

关键词: 干旱, 干旱, 甘薯, 根系, 抗氧化酶

Abstract: Aiming at the problems of soil Pb2 + pollution in Shanxi, we conducted a research to select an environmentally friendly and recyclable biomass material. Taking the biochar prepared from agricultural waste (wheat straw and peanut shell) as the material, we determined the optimal conditions affecting the adsorption by equilibrium adsorption method. The results showed that: when the initial concentration of Pb2 + was 200 mg/L, the optimum adsorption condition was the biochar adding amount of 8 g/L, the pH value of 3-7, and the shock of 360 min at 25℃, and the best adsorption effect was achieved with the adsorption amount of 24.85 mg/g and the removal rate of 99.38%. The adsorption of Pb2+ by this kind of biochar accords with the second-order kinetic equation and the Langmuir isotherm adsorption model, and R2 reaches 0.9994 and 0.9985, respectively. This study shows that the biochar prepared from the wheat straw and peanut shell has a good removal effect on Pb2+ under certain conditions.