Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: - | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
Four types of waste sludge were collected from a drinking water treatment plant (waterworks sludge; WS), sewage treatment plant (sewage
sludge; SS), anaerobic digestion (digested sludge; DS) and landfill site (landfill sludge; LS). These sludges were evaluated as biosorbents for the
removal of Reactive Orange 16 (RO 16). The maximum sorption capacities of the four waste sludges estimated using the Langmuir equation at pH
2 were in order LS (159.0±6.0 mg g−1) > SS (114.7±4.7 mg g−1) >DS (86.8±4.5 mg g−1) >WS (47.0±5.8 mg g−1). However, the desorption efficiency of LS was insufficient (43.2%) compared with that of SS (90.0%), indicating that the SS has the potential to be regenerated as a biosorbent.
From the potentiometric titration and FTIR study, the binding sites present in the SS were considered to be protonated amine groups (–NH3+) , which play a role in the electrostatic interaction with the negatively charged sulfonate groups of RO 16.
In addition, a soprtion study was performed using the HPLC method as described in the European Commission Regulation (EC) No. 440/2008. The adsorption coefficient (log Koc) determind in this test was < 1.25.
The sorption effect of dyes is predominately governed by the protonated amine groups (–NH3 +) , which have an electrostatic interaction with the negatively charged sulfonate groups of Reactive Orange 16.
One test is available on similar substance 2 and the adsorption coefficient of the test item was found to be: log KOC < 1.25.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
