Dealkalization of Bauxite Residue Through Acid Neutralization and Its Revegetation Potential
Dealkalization of Bauxite Residue Through Acid Neutralization and Its Revegetation Potential
复制标题
铝土矿渣酸中和脱碱及其植被恢复潜力
DOI：
10.1007/s11837-019-03911-z
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发表时间：
2019-11
期刊：
影响因子：
2.6
通讯作者：
Liu Runqing
中科院分区：
文献类型：
--
作者：
Zeng Hua;Lyu Fei;Hu Guangyan;Tang Honghu;Wang Li;Sun Wei;Hu Yuehua;Liu Runqing
铝土矿渣是氧化铝生产过程中产生的高碱性工业固体废物。其碱度较高，造成严重的环境污染。本文开发了一种快速、高效、低成本的脱碱工艺。铝土矿残渣通过硫酸和 CAM（一种含钙化合物）脱碱。还研究了脱碱铝土矿残渣的植被恢复潜力。当加入18.4%的硫酸时，脱碱率达到94.31%，2%的CAM在室温下浸出10-30 min。添加CAM达4.5%，过滤速度提高约70倍。随后的盆栽实验表明，脱碱铝土矿渣满足植物生长要求。扫描电镜分析表明，中和后的铝土矿渣粒径增大，从而加速了铝土矿渣的成土过程。本研究为铝土矿渣处置区的生态恢复提供技术支撑。
Bauxite residue is a highly alkaline industrial solid waste generated through the alumina production process. Its high alkalinity causes serious environmental pollution. In this article, a fast, high-efficiency, low-cost dealkalization process was developed. Bauxite residue was dealkalized by sulfuric acid and CAM, a calcium-containing compound. The revegetation potential of dealkali bauxite residue was also studied. The dealkalization rate reached up to 94.31% when 18.4% sulfuric acid was added, and 2% CAM leaching occurred at room temperature for 10–30 min. The filtration speed increased by about 70 times with the addition of CAM up to 4.5%. The subsequent pot experiment showed that the dealkali bauxite residue met the growth requirements of plants. Scanning electron microscopy analysis showed that the particle size of neutralized bauxite residue was enlarged, thereby accelerating the soil formation process of the bauxite residue. This work provides technical support for ecologic restoration of a bauxite residue disposal area.
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影响因子：
2.4
作者：
P. Ekins
通讯作者：
P. Ekins
影响因子：
1.9
作者：
F. Blattner
通讯作者：
F. Blattner
影响因子：
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作者：
Vicki D Crinis
通讯作者：
Vicki D Crinis
影响因子：
0.2
作者：
R. Eglash
通讯作者：
R. Eglash
DOI：
10.1080/13573320701467344
发表时间：
2004-01
期刊：
Wiley-Blackwell: Development Policy Review
影响因子：
--
作者：
J. Roberts;D. Shaw;P. Sahoo;N. Harris;B. Persaud;M. Thakur;I. Gillson;A. Suleiman
通讯作者：
J. Roberts;D. Shaw;P. Sahoo;N. Harris;B. Persaud;M. Thakur;I. Gillson;A. Suleiman