Published 1996 | Version v1
Miscellaneous Metadata-only

Pretreatment of simulated solution of evaporation concentrate for immobilization in bitumen

Creators

  • 1. Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Belo Horizonte, MG (Brazil)

Description

The present work reports the chemical pretreatment of simulated evaporator solution with calcium compound to prepare leach resistant insoluble boron compound. The compounds of calcium borate were prepared by chemical reaction of simulated solution of evaporator concentrate with calcium chloride solution and calcium hydroxide under controlled temperature and time. Insoluble compound of composition Ca B6 O10.4 H2O was obtained from simulated solution of evaporator concentrate by chemical reaction with calcium chloride solution. Other insoluble compounds of compositions Ca B2 O4.6H2O/CaB4/Ca B4 O9.H2O/Ca[B(OH)4]2.2H2O and Na Ca B5 O6(OH)6.5H2O/Ca2 B6 O11.13H2O have been prepared from simulated solution of evaporator concentrate with calcium hydroxide under controlled conditions of temperature and time. A preliminary process flowsheet for immobilization of insoluble compound Na Ca B5 O9.8H2O in bitumen V65 has been investigated and the results of rheological properties and leaching tests of the waste product are presented. (author)

Availability note (English)

Available from the library of the Brazilian Nuclear Energy Commission, Rio de Janeiro

Additional details

Publishing Information

Imprint Pagination
5 p.

Conference

Title
6. General congress on nuclear energy
Original Conference Title
6. Congresso geral de energia nuclear
Dates
27 Oct - 1 Nov 1996
Place
Rio de Janeiro, RJ (Brazil)

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
31031841
Subject category
S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
BITUMENS; BORATES; CALCIUM HYDROXIDES; LEACHING; OPTICAL MICROSCOPY; RADIOACTIVE WASTE PROCESSING; RHEOLOGY; SOLIDIFICATION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BORON COMPOUNDS; CALCIUM COMPOUNDS; DISSOLUTION; HYDROGEN COMPOUNDS; HYDROXIDES; MANAGEMENT; MICROSCOPY; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PROCESSING; SEPARATION PROCESSES; TAR; WASTE MANAGEMENT; WASTE PROCESSING

Optional Information

Notes
20 refs., 4 figs., 2 tabs.; cdtn at urano.cdtn.br