Lengerich cement plant: cement kiln dust (CKD)
North Rhine-Westphalia, Lengerich (Steinfurt district), Germany
Mine tailings and waste rock
- Type
- Mine tailings and waste rock
Late-1970s Tl pollution from a cement plant near Lengerich, which added Tl-rich Meggen pyrite roaster calcines to the raw meal as an iron corrective; deposition estimated up to 400 µg/m²/d, leaf necrosis and alopecia in livestock, stopped in 1979. Tl evaporated in the kiln (up to 1450 °C in the charge) recondenses on preheater dust and accumulates there; bypass purges, then without electrostatic precipitators, may have emitted bursts of dust rich in highly mobile Tl (80 % NH4NO3-extractable). Dust at ε205Tl of -0.19, identical to Meggen pyrite (-0.36): no net fractionation, evaporation being quantitative (Kersten et al., 2014). Indicative coordinates (Lengerich town).
ε205Tl in ε units (parts per 10,000) Values of the same system
Standard : NIST SRM 997
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.19 ± 0.4 ε | Published mean of 2 to 4 analyses; ± 0.40 ε (2 SD); 66 ± 5 mg/kg Tl, of which 54 ± 5 mg/kg extractable with 1 M NH4NO3; sample supplied by a former employee. | Kersten et al. (2014), Tracing anthropogenic thallium in soil using stable isotope compos… |
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Cite this page
IsoFind Atlas (2026). Lengerich cement plant: cement kiln dust (CKD), isotope signatures. https://www.isofind.tech/isotopes/en/sites/cimenterie-de-lengerich-poussieres-de-four-ckd/ (accessed 2026-10-16).
@misc{isofind2026lengerichcementplantcementkil,
title = {Lengerich cement plant: cement kiln dust (CKD), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/cimenterie-de-lengerich-poussieres-de-four-ckd/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16