Saltcake Dissolution Simulant Tests

Abstract

Small-scale (15 to 50 mL) dissolution equilibrium tests were performed on surrogate waste representing typical saltcake at the Savannah River and Hanford Sites. The primary objectives of this study were to gain a better understanding of the solid-liquid equilibrium of simulated-waste saltcakes and chemistry of the dissolved salt solutions. These tests were performed in preparation for similar dissolution tests with actual-waste saltcakes.Two types of tests (single-wash and multiple-wash) were performed at two temperatures (25 °C and 50 °C) for each saltcake simulant. The compositions of the supernatant fluids are provided for both types of dissolution tests, and profiles of the elution of each salt component are provided for the multiple-wash tests.The conclusions from these tests follow:• For both salt waste surrogates, dissolution of the soluble components was achieved at less than a 2:1 mass ratio of inhibited water to saltcake during multiple-wash tests.• Dissolution of the Hanford S-112 simulant resulted in a relatively large weight percentage of residual insoluble material (4.2 wt. %), which was identified as a mixture of Al(OH) 3 phases (bayerite and gibbsite).• The profiles for the relative elution of anions from saltcake during dissolution exhibit distinctions that are dependent upon the dissolution temperature and the initial saltcake composition.

Tank 31H Saltcake Dissolution Tests

“…10 The tests were modified from the salt dissolution simulant tests performed at SRS and the actual waste salt dissolution tests performed at Hanford. 9,8 The multiple-wash test protocol involved contacting actualwaste saltcake with a series of aliquots of dissolution fluid. In contrast with expected full-scale salt dissolution conditions, these tests have relatively close approaches to equilibrium and better mixing.…”

“…The relative dissolution of nitrate, phosphate, carbonate, and sulfate is, however, consistent with the simulant dissolution at 50 °C. 9 Another way in which this data is presented is the chromatographic representation of Figure 15.…”

O Movimento Religioso Dos Surfistas Evangélicos De Florianópolis

“…No mercado religioso atual, o "fast-food" da religião tem ditado as regras do jogo capitalista. Luís Martino 69 , ao refletir sobre isso, diz que, encontramos desde padres-cantores celebrando os showmissas para milhares de pessoas -Padre Marcelo Rossi é o representante máximo -; até líderes evangélicos que lotam seus templos e engordam suas contas bancárias; centros espíritas, terreiros e outros espaços sagrados que abrem com freqüência; revistas laicas que dedicam páginas às possibilidades da utilização de Deus como agente de negócios e, por fim, lojas faturando gnomos e duendes No que se refere à lógica do mercado, Campos argumenta que ela se manifesta como uma nova lógica introduzida no campo religioso, ocasionando uma "transformação dos bens religiosos em bens de mercado". Isso possibilita gerar espaços "para a proliferação do 'cálculo racional', da 'religião de resultados' ou da mesma lógica que impera no mundo dos negócios" 70 .…”