ASTM D4993-89(1998)e1
Historical Standard: ASTM D4993-89(1998)e1 Standard Practice for Calculation and Adjustment of Silica (SiO 2 ) Scaling for Reverse Osmosis
SUPERSEDED (see Active link, below)
ASTM D4993
1. Scope
1.1 This practice covers the calculation and adjustment of silica (SiO2) for the concentrate stream of a reverse osmosis system. The calculations are used to determine the need for scale control in the operation and design of reverse osmosis installations. This practice is applicable for all types of reverse osmosis devices (tubular, spiral wound, and hollow fiber).
1.2 This practice is applicable to both brackish waters and seawaters.
1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D859 Test Method for Silica in Water
D1067 Test Methods for Acidity or Alkalinity of Water
D1129 Terminology Relating to Water
D1293 Test Methods for pH of Water
D3739 Practice for Calculation and Adjustment of the Langelier Saturation Index for Reverse Osmosis
D4194 Test Methods for Operating Characteristics of Reverse Osmosis and Nanofiltration Devices
D6161 Terminology Used for Microfiltration, Ultrafiltration, Nanofiltration and Reverse Osmosis Membrane Processes
Keywords
fouling; reverse osmosis; scaling; silica; solubility; Brackish water/brines; Concentration (of elements); Reverse osmosis (RO) installations; Scale control; Seawater (natural/synthetic); Silica; Silica (SiO 2 ) scaling propoerties
ICS Code
ICS Number Code 71.060.20 (Oxides)
DOI: 10.1520/D4993-89R98E01
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