Removal of heavy metals from sewage by sulphide precipitation: Thermodynamic calculations and tests on a pilot‐scale anaerobic reactor

Cowling, S.J.; Gardner, Michael; Hunt, D. T. E.

doi:10.1080/09593339209385155

Cited by 17 publications

(6 citation statements)

References 6 publications

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“…In an operating system of artificial meanders the main reported route for removal of metals from the water column was by biosorption on detritus and algae [23]but it is also likely that sulfate‐reducing activity in the sediment will have contributed to mineralization of the sedimented metals. Sulfide precipitation also occurs during anaerobic digestion in the presence of sulfate where metal‐removal is a useful by‐product of organic waste treatment [24].…”

Section: Metal Precipitation By Sulfate‐reducing Bacteriamentioning

confidence: 99%

Microbial solubilization and immobilization of toxic metals: key biogeochemical processes for treatment of contamination

1997

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Microorganisms play important roles in the environmental fate of toxic metals with a multiplicity of physico-chemical and biological mechanisms effecting transformations between soluble and insoluble phases. Such mechanisms are important components of natural biogeochemical cycles for metals and metalloids with some processes being of potential application to the treatment of contaminated materials. This paper will concentrate on three selected aspects which illustrate the key importance of microorganisms in effecting changes in metal(loid) solubility, namely toxic metal sulfide precipitation by sulfate-reducing bacteria, heterotrophic leaching by fungi, and microbial transformations of metalloids, which includes reduction and methylation. The basic microbiology of these processes is described as well as their environmental significance and use in bioremediation.

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Section: Metal Precipitation By Sulfate‐reducing Bacteriamentioning

confidence: 99%

Microbial solubilization and immobilization of toxic metals: key biogeochemical processes for treatment of contamination

1997

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“…In aerobic treatment, heavy metals partition fairly equally between effluent and sludge (Karvelas et al, 2003). In anaerobic treatment, heavy metal precipitation to the sludge is generally higher due to sulfide precipitation (Cowling et al, 1992;De la Varga et al, 2013). The partitioning behavior of organic pollutants depends on the compound, with a tendency towards sorbing to the sludge (Katsoyiannis & Samara, 2005).…”

Section: Biological Treatmentmentioning

confidence: 99%

Recycling nutrients contained in human excreta to agriculture: Pathways, processes, and products

Harder

Wielemaker

Larsen

et al. 2019

Critical Reviews in Environmental Science and Technology

172

108

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The need for better nutrient management has spurred efforts towards more comprehensive recycling of nutrients contained in human excreta to agriculture. Research in this direction has intensified throughout the past years, continuously unfolding new knowledge and technologies. The present review aspires to provide a systematic synthesis of the field by providing an accessible overview of terminology, recovery pathways and treatment options, and products rendered by treatment. Our synthesis suggests that, rather than focusing on a specific recovery pathway or product and on a limited set of nutrients, there is scope for exploring how to maximize nutrient recovery by combining individual pathways and products and including a broader range of nutrients. To this end, finding ways to more effectively share and consolidate knowledge and information on recovery pathways and products would be beneficial. The present review aims to provide a template that aims to facilitate designing human excreta management for maximum nutrient recovery, and that can serve as foundation for organizing and categorizing information for more effective sharing and consolidation.

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“…Likewise, about 24.6% of S was adsorbed by soil and reached the maximum at 45-60 cm soil layer, after consecutive application of S-containing fertilizer over 6 years (Saha et al, 2001). Furthermore, Cowling et al (1992) reported that the reoxidation of metal sulfides will produce hydrogen ions, which would induce soil acidification. Gradually, the long-term application of S-containing fertilizer will cause avail-S to accumulate in soil and lead to more severe soil acidification.…”

Section: Application Of Cl-containing Fertilizer On Citrus Is Feasible Under the Premise Of Rainfall Higher Than Evaporationmentioning

confidence: 99%

Migration of Chlorine in Plant–Soil–Leaching System and Its Effects on the Yield and Fruit Quality of Sweet Orange

Liu

Zongying

et al. 2021

Front. Plant Sci.

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Chlorine (Cl) is indispensable for the growth of plants. While rarely systematic reports are available for the effect of Cl-containing fertilizers on citrus production. This study aimed to investigate the impacts of various Cl-containing fertilizers on the nutrients in the leaves, the yield and quality of sweet orange, and the Cl migration in the plant–soil–leaching system. A 5-year field experiment (2016–2020) with five Cl treatments (0, 75, 150, 450, and 900 kg ha−1), and soil core lysimeter test with five Cl levels (0, 150, 225, 300, and 450 kg ha−1) were carried out. The results showed that 77.0% of Cl leached into above 60 cm deeper soil layer, with calcium as the main accompanying ions, resulting in less Cl being absorbed by the citrus plants. The content of Cl in the leaves and soil was enhanced by the increasing input of Cl-containing fertilizer, without yearly increased characteristics, under a mean annual rainfall of 1,474 mm. Chlorine significantly increased the yield (13.24–37.8 9%), fruit weight, and vitamin C (Vc), in addition to enhancing the flavor and the juice yield of sweet orange via improving the absorption of N and K. Moreover, the long-term application of potassium sulfate has elevated the accumulation of sulfur in the soil and in leaves; it is becoming a potential risk factor for citrus production. Taken together, the application of Cl-containing fertilizer in sweet orange is feasible, and trace absorbance of Cl could improve the yield and fruit quality of sweet orange.

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Removal of heavy metals from sewage by sulphide precipitation: Thermodynamic calculations and tests on a pilot‐scale anaerobic reactor

Cited by 17 publications

References 6 publications

Microbial solubilization and immobilization of toxic metals: key biogeochemical processes for treatment of contamination

Microbial solubilization and immobilization of toxic metals: key biogeochemical processes for treatment of contamination

Recycling nutrients contained in human excreta to agriculture: Pathways, processes, and products

Migration of Chlorine in Plant–Soil–Leaching System and Its Effects on the Yield and Fruit Quality of Sweet Orange

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