Immobilization of Cd, Zn and Pb in sewage sludge using red mud

Liang, Zhen; Peng, Xianjia; Zhang, Luan

doi:10.1007/s12665-011-1341-0

Cited by 17 publications

(9 citation statements)

References 40 publications

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“…Liang et al [119] used red mud and lime to immobilize heavy metals in sewage sludge, and found that the two amendments at 10% could significantly reduced the water extractable heavy metals, which was comparable with that at 15% of red mud or lime. Red mud is a kind of mixture that is composed of TiO 2 , a certain amount of dicalcium phosphate, and amorphous aluminosilicate materials.…”

Section: Synergistic Effects Of Different Immobilizing Methodsmentioning

confidence: 97%

“…XRD and SEM analysis showed that there was no detectable changes in the mineralogy of sewage sludge after chemical amendment by 10% red mud. Liang et al [119] selected 10% red mud to mix with sewage sludge, and found that the immobilization efficiency of Cd, Zn, and Pb was 100%, 92%, and 82%, and their plant available was reduced from 18.13%, 17.22%, and 13.64% to 6.98%, 11.36%, and 7.12%, respectively.…”

Section: Red Mudmentioning

confidence: 99%

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Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

2017

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Abstract:The safe disposal of sewage sludge during the process of municipal wastewater treatment has become one of the major concerns of increased production. Land application was thought of as a more economical method for sewage sludge disposal than landfill and incineration. However, the presence of heavy metals in sewage sludge restricted the use of land application. The environmental risk of heavy metals was dependent on their contents, chemical speciations, and soil characteristics. Composting and chemical immobilization were the commonly used methods to immobilize the heavy metals in sewage sludge. The immobilization mechanism and speciation transformation of heavy metals during the composting process were presented. Aluminosilicate, phosphorus-bearing materials, basic compounds, and sulfides were reviewed as the commonly used chemical immobilizing agents. The problems that occur during the immobilization process were also discussed. The combination of different methods and the modification of chemical immobilizing agents both improved the fixation effect on heavy metals.

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Section: Synergistic Effects Of Different Immobilizing Methodsmentioning

confidence: 97%

Section: Red Mudmentioning

confidence: 99%

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

2017

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“…In contrast, Pb concentrations in soil solution decreased with amendment addition. Redmud was shown to be efficient to immobilize metallic elements in several studies (Gray, Dunham, Dennis, Zhao, & McGrath, 2006;Liang, Peng, & Luan, 2012). Such positive effect can be attributed to the high content of Fe and Al oxides, which can complex metals (Gray et al, 2006;Jenne, 1968;Liang et al, 2012).…”

Section: Spw Physico-chemical Propertiesmentioning

confidence: 99%

Effects of carbon‐based materials and redmuds on metal(loid) immobilization and growth of Salix dasyclados Wimm. on a former mine Technosol contaminated by arsenic and lead

et al. 2020

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Metal(loid) soil contamination is a widespread issue and its remediation a priority.Phytoremediation involves the use of plants to stabilize/extract metal(loid)s and prevent spreading of contaminants. Salicaceae are fast growing trees that can tolerate and accumulate metal(loid)s. Amendments may be needed to facilitate plant growth on the contaminated substrate. Biochar, the solid product of pyrolysis, can ameliorate soil properties and reduce metal(loid) bioavailability but showed low affinity toward arsenic. Redmud, a waste product, can immobilize arsenic and other metal(loid)s and improve soil conditions. To evaluate the potential of those amendments to immobilize metal(loid)s and facilitate the establishment of a cover vegetation with willow (Salix dasyclados Wimm.), a pot experiment was conducted using several carbonbased materials (biochar and activated carbon) and redmuds. Two carbon-based materials and two redmuds were selected for the pot experiment based on characteristics and sorption tests. A former mining soil was amended with these products and Salix dasyclados cuttings were planted. Biochar and one redmud improved growth of Salix dasyclados Wimm. Redmud, which is cheaper than biochar, performed equally well as the biochar at a lower application rate. It can therefore be concluded that the application of redmud, associated to Salix dasyclados, could be an option for the phytoremediation of an As and Pb contaminated soil. However, these results need to be evaluated on a bigger scale to assess the gain brought by the combination of redmud and Salix dasyclados on the contaminated area.

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“…In our study, alkaline amendments (A and B) composed of CaO had significant positive effects on the decrease of soil Acd, which can be probably due to pH value. A large number of studies (68, 69) have shown that soil pH is a very important factor affecting available heavy metal concentration, controlling the adsorption-desorption of heavy metals in soil and the chemical behaviors such as dissolution-deposition. And alkaline amendments also had a favorable impact on taxonomic and functional patterns, especially on microbial diversity, soil nitrogen fixation and the growth of related bacteria, which conducive to the decrease of soil Acd.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Remediation Through Stabilizing Amendments on Taxonomic and Metabolic Patterns of Bacteria and Archaea in Cadmium-Contaminated Paddy Fields in Southwestern China

Chen

Pan

Jiang

et al. 2018

Preprint

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42. during the period of irrigation, but be in an oxidation state when fields were in draining 43 and drying periods. The periodical alternation of wetting and drying forms unique 44 physical, chemical, and biological properties, and it is vital to understanding the 45 taxonomic and functional dynamics of microbiomes in amended soils in order to improve 46 the process performance. 47 Introduction 50Cadmium is characterized by its toxicity, accumulation, and mobility in the environment, 51 and can result in potential hazards for human health through the soil-food chain transfer 52 (1). In recent years, with the increases in atmospheric deposition and human activities, 53 such as mining, the application of organic and inorganic fertilizers or sewage sludge, and 54 wastewater irrigation, heavy metal pollution in soil has increased dramatically (2,3,4). In 55China, heavy metal pollution in soil is decreasing the country's grain harvest by tens of 56 millions of tons every year (5, 6). Another study showed that more than 70% of the rice 57 grain samples from metal-contaminated rice fields across south China were 58 Cd-contaminated (7). The multi-target regional geochemical survey of Chengdu 59 economic zone revealed that the abundance of heavy metals, especially cadmium, was 60 abnormal over large areas of Deyang (northeast of the Chengdu Plain). Besides, the 61 results of the ecological geochemical assessment conducted in this region showed that 62 the source of heavy metals pollution of soil, such as cadmium pollution, is the LongmenMountains, which accumulates the mineral cadmium and near-surface atmospheric dust 64 produced by industrial and mining enterprises. Heavy metal pollution has been a severe 65 challenge to the sustainable utilization of cultivated land resource and food production 66 safety. Therefore, environmental engineers have given high priority to the reduction of of 67 toxic metal bioavailability in croplands to ensure food security and human health (8). 68 At present, the techniques of soil heavy metal pollution remediation are divided into 69 four parts: phytoremediation, micro-remediation, physical remediation, and chemical 70 remediation. The new-soil technology, adsorption, and electrokinetics (EK) belong to the 71 physical remediation group, while leaching, biological reduction, complexation, and 72 in-situ immobilization (9) are all part of the chemical remediation group. Of these 73 remediation technologies, in-situ immobilization is considered to be the most effective 74 and low-cost remediation, especially for non-point source pollution in cultivated soil (10). 75The key to the technology is to select suitable amendments, of which the most commonly 76 used ones are alkaline materials, phosphorous materials, clay minerals, iron manganese 77 oxides and organic materials (11). These materials can change the existing forms of 78 heavy metal in soil through ion exchange, adsorption, and precipitation, and reduce the 79 mobility and bioavailability of heavy metals. The environmental effect ...

show abstract

Immobilization of Cd, Zn and Pb in sewage sludge using red mud

Cited by 17 publications

References 40 publications

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

Effects of carbon‐based materials and redmuds on metal(loid) immobilization and growth of Salix dasyclados Wimm. on a former mine Technosol contaminated by arsenic and lead

The Impact of Remediation Through Stabilizing Amendments on Taxonomic and Metabolic Patterns of Bacteria and Archaea in Cadmium-Contaminated Paddy Fields in Southwestern China

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