任乐辉1,
何月田1,
黄建洪1,
胡学伟1,
田森林1,
宁平1,
丘锦荣2
1.昆明理工大学环境科学与工程学院，昆明 650500
2.环境保护部华南环境科学研究所，广州 510655
基金项目: 昆明理工大学引进人才科研启动基金项目（KKZ3201622005）
国家公益性（环保）行业科研专项（201509048）
Effect of soil-conversion red mud by using sugar by-products
ZHANG Linfeng1,,REN Lehui1,
HE Yuetian1,
HUANG Jianhong1,
HU Xuewei1,
TIAN Senlin1,
NING Ping1,
QIU Jinrong2
1.Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
2.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
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摘要:赤泥因具有碱性高、孔隙率低、团聚性差和养分缺乏等问题，同时因其生产性状差，堆场植被复垦难以实现；而且在堆存过程中，重金属元素具有潜在的长期浸出性，存在污染环境的风险。利用富含多种有机成分且蓬松度好的制糖副产物酒精废醪液、蔗渣对赤泥进行改性，可实现土壤化及植被复垦。结果表明，添加制糖副产物对赤泥理化性质及所含重金属迁移性具有显著影响，蔗渣能使孔隙度得到改善，酒精废醪液与赤泥比值（mL:g）＞3时，赤泥的pH可降至8以下，配合添加酒精废醪液和蔗渣可使赤泥的有机质含量从（19.8±1.2）g·kg-1增加到200 g·kg-1左右，经土柱模拟实验发现添加剂可使赤泥所含重金属的生物有效性增强。
关键词: 拜耳法赤泥/
制糖生产副产物/
重金属迁移/
土壤化赤泥
Abstract:Due to the property of high alkaline, low porosity, poor agglomeration, lack of nutrients, and also poor in production, red mud is hard to be rehabilitated in the yard. Additionally, red mud has the long-term leaching potential of heavy metals in the storage process, causing high environmental pollution risk. The work tends to modify red mud into soil and vegetation restoration by using the sugar by-products, alcohol waste mash and bagasse, which are rich in various organic components and good fluffiness.The results show that the addition of sugar by-products has a significant effect on the physical and chemical properties of red mud and the mobility of heavy metals,the porosity can be improved.When ratio of alcohol waste liquid and red mud (mL:g) was more than 3, the pH of the red mud was reduced to 8, and the organic content of red mud increased from (19.8±1.2)g·kg-1 to 200 g·kg-1 with the additives. By the soil column simulation experiment, the results confirm that the additive can enhance the bioavailability of heavy metals in red mud.
Key words:Bayer process red mud/
sucrose production by-products/
heavy metal migration/
soil-conversion red mud.
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利用制糖副产物土壤化赤泥的效果
张林丰1,,任乐辉1,
何月田1,
黄建洪1,
胡学伟1,
田森林1,
宁平1,
丘锦荣2
1.昆明理工大学环境科学与工程学院，昆明 650500
2.环境保护部华南环境科学研究所，广州 510655
基金项目: 昆明理工大学引进人才科研启动基金项目（KKZ3201622005） 国家公益性（环保）行业科研专项（201509048）
关键词: 拜耳法赤泥/
制糖生产副产物/
重金属迁移/
土壤化赤泥
摘要:赤泥因具有碱性高、孔隙率低、团聚性差和养分缺乏等问题，同时因其生产性状差，堆场植被复垦难以实现；而且在堆存过程中，重金属元素具有潜在的长期浸出性，存在污染环境的风险。利用富含多种有机成分且蓬松度好的制糖副产物酒精废醪液、蔗渣对赤泥进行改性，可实现土壤化及植被复垦。结果表明，添加制糖副产物对赤泥理化性质及所含重金属迁移性具有显著影响，蔗渣能使孔隙度得到改善，酒精废醪液与赤泥比值（mL:g）＞3时，赤泥的pH可降至8以下，配合添加酒精废醪液和蔗渣可使赤泥的有机质含量从（19.8±1.2）g·kg-1增加到200 g·kg-1左右，经土柱模拟实验发现添加剂可使赤泥所含重金属的生物有效性增强。
English Abstract
Effect of soil-conversion red mud by using sugar by-products
ZHANG Linfeng1,,REN Lehui1,
HE Yuetian1,
HUANG Jianhong1,
HU Xuewei1,
TIAN Senlin1,
NING Ping1,
QIU Jinrong2
1.Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
2.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
Keywords: Bayer process red mud/
sucrose production by-products/
heavy metal migration/
soil-conversion red mud
Abstract:Due to the property of high alkaline, low porosity, poor agglomeration, lack of nutrients, and also poor in production, red mud is hard to be rehabilitated in the yard. Additionally, red mud has the long-term leaching potential of heavy metals in the storage process, causing high environmental pollution risk. The work tends to modify red mud into soil and vegetation restoration by using the sugar by-products, alcohol waste mash and bagasse, which are rich in various organic components and good fluffiness.The results show that the addition of sugar by-products has a significant effect on the physical and chemical properties of red mud and the mobility of heavy metals,the porosity can be improved.When ratio of alcohol waste liquid and red mud (mL:g) was more than 3, the pH of the red mud was reduced to 8, and the organic content of red mud increased from (19.8±1.2)g·kg-1 to 200 g·kg-1 with the additives. By the soil column simulation experiment, the results confirm that the additive can enhance the bioavailability of heavy metals in red mud.
