Search | Engineering

Subscribe Submit

Home Journals Focus Achievement Fronts About Us 中文版

Resource Type

Journal Article 2

Year

2019 1

2014 1

Keywords

Anaerobic digestion 1

Biosolids 1

Contamination 1

Methamphetamine 1

Sorption 1

dry-toilet 1

heavy metals 1

risk assessment 1

suburban areas 1

open ︾

Search scope:

排序： Display mode:

Assessment of metals in dry-toilet collected matters from suburban areas of Ulaanbaatar, Mongolia, using biosolids

Xuan LIU,Zifu LI,Eric BOSC,Heinz-Peter MANG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5, Pages 710-718 doi: 10.1007/s11783-013-0592-2

Abstract: Dry-toilet collected matter (DCM) from traditional dry-toilet pits are a potential health and ecological risk in suburban areas. In this study, the characteristics of metals in DCMs from suburban areas of Ulaanbaatar were surveyed. The results indicate that DCMs contain a high percentage of organic matter and nutrients, while heavy metals are at low levels, which shows good agricultural potential. The concentration ranges of Cr, Cu, Hg, Ni, Pb, and Zn were 11±5, 46±9, 0.08±0.05, 9±3, 17±9, and 338±86 mg·kg , respectively. The concentration of Cd was below 0.5 mg·kg , and a high positive relation was shown between chromium and nickel concentrations. The heavy metals in DCMs were safe for land application but Zn in DCMs was close to the effects range median (ERM), which is toxic in some cases, such as amphipod bioassays. Because it is mandatory to treat DCMs to reduce pathogens, in the case of heavy metal enrichment and agricultural reuse, composting or pyrolysis are better choices than incineration. Compared with global soil background values, the heavy metals in DCMs showed a low level of ecological risk, but a medium level when compared with Mongolian soil background values. The ecological risk of six heavy metals was in the descending order Hg>Cu>Zn>Pb>Ni>Cr and the contribution rate of Hg exceeded 60%.

Keywords： heavy metals suburban areas dry-toilet risk assessment

HTML PDF Collect

Understanding the Removal and Fate of Selected Drugs of Abuse in Sludge and Biosolids from Australian Article

Meena K. Yadav, Cobus Gerber, Christopher P. Saint, Ben Van den Akker, Michael D. Short

Engineering 2019, Volume 5, Issue 5, Pages 872-879 doi: 10.1016/j.eng.2019.07.012

Abstract: However, little information exists on their presence in treated sludge or biosolids.In this study, we examined sludge and biosolids from a large metropolitan wastewater treatment plantMethamphetamine, codeine, and morphine were detected in all biosolids samples at mean concentrationssolids and in soil, and can persist in biosolids for at least several years.are very low at typical Australian biosolids application rates.

Keywords： Anaerobic digestion Biosolids Contamination Methamphetamine Sorption