Application of palygorskite clay serving as adsorbent in treatment of picric acid waste water

A palygorskite clay and adsorbent technology, which is applied in the direction of adsorption of water/sewage treatment, other chemical processes, chemical instruments and methods, etc., to achieve the effect of less addition, low cost and high removal rate

Active Publication Date: 2012-07-25
临泽县奋君矿业有限公司
4 Cites 17 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, the use of palygorskite clay to adsorb pi...
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Abstract

The invention relates to an application of palygorskite clay serving as an adsorbent in treatment of picric acid waste water, belonging to the technical field of wastewater treatment. The palygorskite clay serving as the adsorbent can be powder obtained after the palygorskite clay raw ore is crushed directly, purified palygorskite clay or palygorskite clay physically modified by utilizing acid treatment or thermal treatment or chemically modified by utilizing a surface active agent or coupling agent. The adsorption test proves that all types of palygorskite clay can favorably adsorb the picric acid in an aqueous phase with low adding amount and low cost. The wastewater treatment result fully meets the requirement of the Detection and Analysis Methods of Water and Wastewater (Fourth Edition) and GB8978-1996. Therefore, palygorskite clay has bright application prospect.

Application Domain

Other chemical processesWater/sewage treatment by sorption

Technology Topic

Picric acidChemistry +8

Examples

  • Experimental program(6)

Example Embodiment

[0021] Example 1
[0022] (1) Treatment of palygorskite clay
[0023] The palygorskite clay ore is crushed and passed through a 200-mesh sieve for use.
[0024] (2) Treatment of wastewater containing picric acid
[0025] Related indicators of wastewater: picric acid concentration 100mg/L, pH=4
[0026] Treatment method: Take 10 mg of palygorskite clay, add it to 10 mL of wastewater, stir for 30 minutes, and settle for 15 minutes.
[0027] Related indicators of treated wastewater: picric acid concentration 1.9mg/L, pH=6.8.

Example Embodiment

[0028] Example 2
[0029] (1) Purification treatment of palygorskite clay
[0030] The palygorskite clay ore was crushed, passed through a 200-mesh sieve, dispersed in distilled water, mechanically stirred at a speed of 130r/min for 0.5~1h, ultrasonically dispersed for 30min, settled, dried, crushed and passed through an 800-mesh sieve to obtain a pure slope Stone clay.
[0031] (2) Treatment of wastewater containing picric acid
[0032] Related indicators of wastewater: picric acid concentration 100mg/L, pH=4
[0033] Treatment method: Take 10 mg of purified palygorskite clay, add it to 10 mL of wastewater, stir for 30 minutes, and settle for 15 minutes.
[0034] Related indicators of the treated wastewater: picric acid concentration 1.8mg/L, pH=6.9.

Example Embodiment

[0035] Example 3
[0036] (1) Treatment of palygorskite clay
[0037] The palygorskite clay ore was crushed, passed through a 200-mesh sieve, dispersed in distilled water, mechanically stirred at a speed of 130r/min for 0.5-1h, ultrasonically dispersed for 30min, and settled to obtain pure palygorskite clay; Disperse the stone clay in distilled water to form a suspension, add 1~2mol/L acid (hydrochloric acid, sulfuric acid or nitric acid, the amount of acid added is based on the palygorskite clay suspension no more bubbles are generated as the standard), stir, centrifuge, and wash , Dried, crushed through 600 mesh sieve for later use.
[0038] (2) Treatment of wastewater containing picric acid
[0039] Related indicators of wastewater: picric acid concentration 100mg/L, pH=4
[0040] Treatment method: Take 10mg of acid to treat palygorskite clay, add it to 10mL of wastewater, stir for 30min, and settle for 15min.
[0041] Related indicators of treated wastewater: picric acid concentration 1.2mg/L, pH=7.1.
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PUM

PropertyMeasurementUnit
Concentration1.9mg/l
Concentration1.8mg/l
Concentration1.2mg/l
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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