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Method for determining gold content of sludge by using active carbon adsorption atomic absorption method

An activated carbon adsorption and atomic absorption technology, which is applied in the field of chemical analysis and detection, can solve the problems of frequent use of unsuitable sludge recovery plants, long period of analysis and experiment, and difficult operation, so as to reduce the time of experiment and analysis, shorten the period of analysis, and be easy to operate. Effect

Active Publication Date: 2016-11-09
SUZHOU NEW DISTRICT ENVIRONMENTAL PROTECTION SERVICE CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional measurement method has cumbersome steps, is not easy to operate, and has a long analysis cycle, which is not suitable for frequent use in sludge recycling plants

Method used

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  • Method for determining gold content of sludge by using active carbon adsorption atomic absorption method

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Embodiment 1

[0030] This embodiment discloses a method for determining gold content in sludge by activated carbon adsorption atomic absorption method, which is used to determine the gold content in organic sludge.

[0031] First prepare the spare materials:

[0032] The following steps are used to prepare the activated carbon-pulp adsorption column for subsequent use:

[0033] a. Preparation of pulp: remove an appropriate amount of filter paper and crush it, put it into a mortar and add water to mash it for later use;

[0034] b. Preparation of activated carbon: Activated carbon in 20g / L NH 4 HF 2 Soak in the solution for 3 days, filter, wash with HCL and hot water and set aside;

[0035] c. Mix the treated activated carbon and pulp with a dry mass ratio of 1:2 to obtain the activated carbon-pulp mixture for use;

[0036] d. Tightly install the adsorption column in the round hole of the suction filter cartridge, add pulp into the adsorption column, start the vacuum pump to dry and comp...

Embodiment 2

[0045] This embodiment discloses a method for determining gold content in sludge by activated carbon adsorption atomic absorption method, which is used for determining the gold content in inorganic sludge.

[0046] The determination process specifically includes the following steps:

[0047] (1) Sample treatment: After uniformly mixing the sludge samples, take an appropriate amount of samples and place them in an oven, bake them at a temperature of 105±5°C for 10 hours to a constant weight, put the samples baked to a constant weight in a pulverizer, and pass through 100 meshes Filter and sieve, then use a muffle furnace to bake at 800°C for 1 hour to obtain a sludge sample for use;

[0048] (2) Sample digestion: Take 5-8g of the sludge sample obtained in step (1) into a 250ml beaker, first wet the sample with water, then add 200ml of aqua regia, wait for complete reaction, place it on an electric furnace for heating and digestion, wait for the digestion solution Stop heating ...

Embodiment 3

[0054] This embodiment discloses a method for determining the gold content in sludge by activated carbon adsorption atomic absorption method, which is used for determining the gold content in sludge with multiple impurities and complex components.

[0055] The determination process specifically includes the following steps:

[0056] (1) Sample treatment: After uniformly mixing the sludge samples, take an appropriate amount of samples and place them in an oven, bake them at a temperature of 105±5°C for 10 hours to a constant weight, put the samples baked to a constant weight in a pulverizer, and pass through 100 meshes Filter and sieve, then use a muffle furnace to bake at 800°C for 1 hour to obtain a sludge sample for use;

[0057] (2) Sample digestion: Take 5-8g of the sludge sample obtained in step (1) into a 250ml beaker, first wet the sample with water, then add 200ml of aqua regia, wait for complete reaction, place it on an electric furnace for heating and digestion, wait...

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Abstract

The present invention provides a method for determining gold content of sludge by using active carbon adsorption atomic absorption method, including: drawing a series of standard solution working curves, pretreating sludge under gold content determination, adding aqua regia for heating and decomposing, adding polyacrylamide as an adsorbent for adsorbing, determining in an organic phase, absorbance of a sample solution by using an atomic absorption spectrophotometer, and calculating the gold content of the sludge according to the absorbance and the series of standard solution working curves. By using the polyacrylamide as an adsorbent for decomposing, the method of the invention provides better adsorption effect than the use of traditional animal glue so that better adsorption and filtration effect is provided at the premise of shortened treatment time; meanwhile, after being dried, crushed and screened, a sludge sample is added directly into aqua regia for decomposing, the steps for treating the sludge sample are simplified, it is convenient for staff to operate, the analytical time for a single test is shortened, analytical period is shortened, and the method is particularly valuable for frequent sampling and determining in a sludge recycling factory.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection, and in particular relates to a method for determining gold content in sludge by an activated carbon adsorption atomic absorption method. Background technique [0002] When industrial sludge is recycled into the plant, it is necessary to measure the gold content in the sludge. The greater the gold content, the higher the price, and vice versa. The traditional measurement method has cumbersome steps, is not easy to operate, and has a long analysis cycle, which is not suitable for frequent use in sludge recovery plants. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a method for determining gold content in sludge by activated carbon adsorption atomic absorption method. The detection limit is lowered, which can meet the needs of frequent measurement in sludge recycling plants. [0004] In order to...

Claims

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Application Information

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IPC IPC(8): G01N21/31B01J20/20
CPCB01J20/20B01J2220/4831G01N21/3103
Inventor 姜照东倪红王青徐寒静
Owner SUZHOU NEW DISTRICT ENVIRONMENTAL PROTECTION SERVICE CENT CO LTD
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