| 王瑜堂,张军,岳波,王敦球,於俊颖,黄启飞,吴小卉,靳琪.村镇生活垃圾重金属含量及其土地利用中的环境风险分析[J].农业环境科学学报,2017,36(8):1634-1639. |
| 村镇生活垃圾重金属含量及其土地利用中的环境风险分析 |
| Heavy metal content of the rural solid waste and its land utilization environmental risk analysis |
| 投稿时间：2016-12-12 |
| DOI：10.11654/jaes.2016-1593 |
| 中文关键词: 村镇生活垃圾 重金属含量 潜在生态风险 |
| 英文关键词: rural living solid waste heavy metal content potential ecological risk |
| 基金项目:国家科技支撑计划课题（2014BAL02B01） |
|
| 摘要点击次数: 2414 |
| 全文下载次数: 2670 |
| 中文摘要: |
| 对全国12个省份72个典型村镇产生的生活垃圾进行采样调查，系统分析了我国村镇生活垃圾的重金属含量及其土地利用的环境风险。结果表明：我国典型村镇生活垃圾中重金属Hg、Pb、Cd、Cr、Cu和Zn的含量分别为（0.74±0.48）、（21.80±17.61）、（3.36±11.01）、（108.63±84.01）、（36.83±10.91）、（80.09±42.24） mg·kg-1；依据《城镇垃圾农用控制标准》，Hg、Pb、Cd、Cr的超标率分别是1.74%、3.44%、14.29%、2.09%。村镇生活垃圾土地利用的重金属环境风险评估表明：重金属单因子污染指数大小顺序为Cd>Hg>Cr>Cu>Zn>Pb，其中Cd和Hg分别为重度和轻度污染；重金属内梅罗综合污染指数为4.08（重度污染），Cd和Hg的贡献最大；重金属潜在生态风险程度依次为Cd>Hg>Cu>Pb>Cr>Zn，综合潜在生态风险等级为强生态危害。 |
| 英文摘要: |
| Two raw materials, i.e., rice bran and camellia shell, were used to produce biochars via pyrolysis at 650℃. The physical and chemical properties of biochars were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), and Brunauer-Emmett-Teller(BET) surface area analyses. The effects of particle size, mineral composition, contact time, and initial Pb2+ concentration on Pb2+ adsorption by biochars were examined. The results showed that compared to rice bran-derived biochar, camellia shell-derived biochar had smaller specific surface area, but was more effective in removing heavy metals from aqueous solutions. The adsorption isotherm of Pb2+ by camellia shell-derived biochar fit the Langmuir model well, and the adsorption capacity was 165.62 mg·g-1, which was higher than that of rice bran-derived biochar(58.92 mg·g-1). The results of XRD analysis showed that camellia shell-derived biochar contained a large amount of mineral components and appeared as a precipitate after adsorption. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
