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Recovery of Ag from used X-ray films by enzyme hydrolysis gelatine membrane; Zerachin maku no sanso kasui bunkai ni yoru shiyozumi X sen film kara no gin no kaishu

Journal Article:

Abstract

The recovery of Ag from used X-ray films was tested by enzyme hydrolysis of gelatine films. The gelatine films of used X-ray films fixed on the bottom surface of a agitation bath type batch reactor were first hydrolyzed with protease B21-2. As a result, the hydrolysis rate was dependent on the diffusion rate of enzyme or decomposed products in liquid films and the enzyme reaction rate on the gelatine film surface, while it was independent of the existence of Ag particles. Based on these results, the models for a hydrolysis reaction mechanism and an isolation mechanism of Ag particles were derived. The tubular reactor of 4,800 cm{sup 3} in capacity with inner agitating blades was next prepared, and used X-ray film tips fed from a hopper were continuously hydrolyzed while agitating. As a result, the experimental result well agreed with the model calculation one, and Ag particles were separated completely at 37{degree}C, 9.1 rpm in blade revolution and more than 600 Unit/mL in enzyme content. 4 refs., 3 figs.
Authors:
Ishikawa, H [1] 
  1. University of Osaka Prefecture, Osaka (Japan). College of Engineering
Publication Date:
Sep 05, 1994
Product Type:
Journal Article
Reference Number:
SCA: 400105; 400201; PA: NEDO-94:914297; EDB-95:064734; SN: 95001375560
Resource Relation:
Journal Name: Kagaku Kogaku (Chemical Engineering); Journal Volume: 58; Journal Issue: 9; Other Information: PBD: 5 Sep 1994
Subject:
40 CHEMISTRY; SEPARATION PROCESSES; PHOTOGRAPHIC FILMS; MATERIALS RECOVERY; SILVER; HYDROLYSIS; MEMBRANES; GELATIN; ENZYMES; DECOMPOSITION; DIFFUSION; ENZYME ACTIVITY; MATHEMATICAL MODELS; BIOREACTORS
OSTI ID:
33921
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: KKGKA4; ISSN 0375-9253; TRN: 94:914297
Submitting Site:
NEDO
Size:
pp. 32-34
Announcement Date:
May 05, 1995

Journal Article:

Citation Formats

Ishikawa, H. Recovery of Ag from used X-ray films by enzyme hydrolysis gelatine membrane; Zerachin maku no sanso kasui bunkai ni yoru shiyozumi X sen film kara no gin no kaishu. Japan: N. p., 1994. Web.
Ishikawa, H. Recovery of Ag from used X-ray films by enzyme hydrolysis gelatine membrane; Zerachin maku no sanso kasui bunkai ni yoru shiyozumi X sen film kara no gin no kaishu. Japan.
Ishikawa, H. 1994. "Recovery of Ag from used X-ray films by enzyme hydrolysis gelatine membrane; Zerachin maku no sanso kasui bunkai ni yoru shiyozumi X sen film kara no gin no kaishu." Japan.
@misc{etde_33921,
title = {Recovery of Ag from used X-ray films by enzyme hydrolysis gelatine membrane; Zerachin maku no sanso kasui bunkai ni yoru shiyozumi X sen film kara no gin no kaishu}
author = {Ishikawa, H}
abstractNote = {The recovery of Ag from used X-ray films was tested by enzyme hydrolysis of gelatine films. The gelatine films of used X-ray films fixed on the bottom surface of a agitation bath type batch reactor were first hydrolyzed with protease B21-2. As a result, the hydrolysis rate was dependent on the diffusion rate of enzyme or decomposed products in liquid films and the enzyme reaction rate on the gelatine film surface, while it was independent of the existence of Ag particles. Based on these results, the models for a hydrolysis reaction mechanism and an isolation mechanism of Ag particles were derived. The tubular reactor of 4,800 cm{sup 3} in capacity with inner agitating blades was next prepared, and used X-ray film tips fed from a hopper were continuously hydrolyzed while agitating. As a result, the experimental result well agreed with the model calculation one, and Ag particles were separated completely at 37{degree}C, 9.1 rpm in blade revolution and more than 600 Unit/mL in enzyme content. 4 refs., 3 figs.}
journal = {Kagaku Kogaku (Chemical Engineering)}
issue = {9}
volume = {58}
journal type = {AC}
place = {Japan}
year = {1994}
month = {Sep}
}