GB/T 7701.2-2008Granular activated carbon from coal - Granular activated carbon from coal for water treatment (English PDF)

Foreword

GB/T 7701 Granular activated carbon from coal is divided into.

- Part 1: Granular activated carbon from coal for gas phase;

- Part 2: Granular activated carbon from coal for water treatment;

- Part 3: Granular activated carbon from coal for carrier.

This part is the Part 2 of GB/T 7701.Annex C modifies and adopts ASTM D 5029-1998 Standard test method for water soluble content in activated carbon (re-confirmed in 2004). The main changes are as follows.

- Delete safety term in the Scope;

- Delete sections Quoted references, Terminology, Test method introduction, Meaning and use, and Keywords;

- Delete the examples in result calculation;

- Delete the repeatability requirement in section Precision and deviation.

This part shall replace GB/T 7701.4-1997 Granular activated carbon from coal for water treatment. The main changes are as follows.

- Delete quality classification;

- Formulate indicators for water soluble substance;

- Adsorption of methylene blue in ex-factory inspection items is changed from "inspection item" to "item to be agreed by supplier and purchaser";

- Iodine value is changed to >= 800 mg/g;

- Delete indicator of ash content;

- it no longer stipulates specific technical indicators for pore volume and specific surface area;

- Add measurement of humic acid adsorption in Annex A;

- Add measurement of tannin acid adsorption in Annex B;

- Add measurement of water soluble substance in Annex C.

Annexes A, B and C are normative.

1 Scope

This part specifies the requirements, inspection rules, test methods, mark, package, transportation, and storage etc. for granular activated carbon from coal for water treatment.

This part is applicable to dechlorination, oil removal and purification for industrial water; further purification treatment for drinking water and sewage; and granular activated carbon from coal for water treatment when water source are outbreak-polluted.

2 Normative references

The articles contained in the following documents have become this part of GB/T 7701 when they are quoted herein. For the dated documents so quoted, all the modifications (excluding corrigendum) or revisions made thereafter shall not be applicable to this Standard. For the undated documents so quoted, the latest editions shall be applicable to this Standard.

GB/T 1914 Chemical analytical filter paper

GB/T 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-2008, ISO 3696:1987, MOD)

GB/T 7701.1-2008 Granular activated carbon from coal - Granular activated carbon from coal for gas adsorption

GB/T 7702.1 Determination of moisture in granular activated carbon from coal

GB/T 7702.2 Standard test method for particle size distribution of granular activated carbon from coal

GB/T 7702.3 Test method for granular activated carbon from coal - Determination of hardness

GB/T 7702.4 Standard test method for packing density of granular activated carbon from coal

GB/T 7702.6 Test method for granular activated carbon from coal - Determination of methylene blue adsoption

GB/T 7702.7 Test method for granular activated carbon from coal - Determination of iodine number

3 Requirements

4 Inspection rules

5 Inspection methods

6 Mark, package, transportation, storage

It shall accord with Chapter 6 of GB/T 7701.1-2008.

Annex A (Normative) Measurement of humic acid absorption