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Preparation method for heavy metal ion adsorbent, and sewage treating agent

A technology of heavy metal ions and sewage treatment agents, applied in the direction of adsorption water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low treatment efficiency, high energy consumption, secondary pollution, etc. Achieve the effect of large adsorption capacity, small dosage and high removal rate

Inactive Publication Date: 2017-06-30
QINGDAO CHENDA BIOLOGICAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the chemical precipitation method has simple equipment, convenient operation, and good treatment effect, but it consumes a lot of chemical reagents, is expensive, and easily causes secondary pollution.
The electrolysis process is mature and has a high removal rate, but it consumes a lot of energy and electrode metal when treating a large amount of wastewater, and its large-scale application is limited.
Membrane separation method takes into account both water purification and heavy metal recovery, but due to technical difficulty, high membrane cost and low treatment efficiency
Adsorption is a relatively effective method to deal with heavy metal pollution. The most commonly used adsorbent is activated carbon, which has defects such as not outstanding adsorption effect and no adsorption selectivity.

Method used

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  • Preparation method for heavy metal ion adsorbent, and sewage treating agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of Heavy Metal Ion Adsorbent

[0023] S1: Add 10 mg of graphite oxide into a round-bottomed flask, add 100 ml of deionized water, and then place the round-bottomed flask in an ultrasonic instrument for ultrasonic dispersion for 1 hour to obtain a 0.1 mg / ml graphite oxide dispersion.

[0024] S2: Add oxidized guar gum and γ-aminopropyltriethoxysilane to the graphite oxide dispersion, raise the temperature to 60° C., stir for 5 hours, cool to room temperature, and freeze-dry to obtain heavy metal ion adsorbent X1. Wherein, the oxidation degree of the oxidized guar gum is 35%, and the weight ratio of the oxidized guar gum, silane coupling agent and graphite oxide is 100:1:1.

Embodiment 2

[0026] Preparation of Heavy Metal Ion Adsorbent

[0027] S1: Add 10 mg of graphite oxide into a round-bottomed flask, add 100 ml of deionized water, and then place the round-bottomed flask in an ultrasonic instrument for ultrasonic dispersion for 1 hour to obtain a 0.1 mg / ml graphite oxide dispersion.

[0028] S2: Add oxidized guar gum and γ-aminopropyltriethoxysilane to the graphite oxide dispersion, raise the temperature to 65° C., stir for 5 hours, cool to room temperature, and freeze-dry to obtain heavy metal ion adsorbent X2. Wherein, the oxidation degree of the oxidized guar gum is 40%, and the weight ratio of the oxidized guar gum, silane coupling agent and graphite oxide is 120:2:1.

Embodiment 3

[0030] Preparation of Heavy Metal Ion Adsorbent

[0031] S1: Add 15 mg of graphite oxide into a round-bottomed flask, add 100 ml of deionized water, and then place the round-bottomed flask in an ultrasonic instrument for ultrasonic dispersion for 1 hour to obtain a 0.15 mg / ml graphite oxide dispersion.

[0032] S2: Add oxidized guar gum and γ-aminopropyltriethoxysilane to the graphite oxide dispersion, raise the temperature to 70° C., stir for 5 hours, cool to room temperature, and freeze-dry to obtain heavy metal ion adsorbent X3. Wherein, the oxidation degree of the oxidized guar gum is 25%, and the weight ratio of the oxidized guar gum, silane coupling agent and graphite oxide is 100:1.5:1.

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Abstract

The invention discloses a preparation method for a heavy metal ion adsorbent, and a sewage treating agent containing the prepared heavy metal ion adsorbent. The preparation method comprises the following steps: S1, adding graphite oxide into water and carrying out ultrasonic dispersion so as to obtain graphite oxide dispersion; and S2, adding oxidized guar gum and a silane coupling agent into the graphite oxide dispersion, carrying out heating to 60 to 70 DEG C and then successively carrying out a stirring reaction for 4 to 6 h, cooling to room temperature and drying so as to obtain the heavy metal ion adsorbent, wherein the oxidation degree of the oxidized guar gum is 25 to 40%. The heavy metal ion adsorbent and the sewage treating agent prepared in the invention can effectively adsorb heavy metal ions, especially lead ions, and have a high heavy metal ion removal rate. The heavy metal ion adsorbent is great in adsorption capacity, small in usage amount, cost-saving and convenient to use.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a preparation method of a heavy metal ion adsorbent and a sewage treatment agent. Background technique [0002] With the rapid economic growth and the rapid development of modern industry and agriculture, environmental issues have become global issues, which have attracted widespread attention at home and abroad. Among them, water pollution has received special attention because it is closely related to human life. As one of the important factors causing water pollution, heavy metal ions are easy to accumulate in organisms because they cannot be biodegraded, posing a serious threat to organisms and human health. [0003] In water pollution, heavy metal ions mainly include cadmium, lead, mercury, copper, etc. Heavy metal ion pollution presents the following characteristics: 1. Heavy metals are difficult to degrade under natural conditions, so heavy metal wastewater pollution lasts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/22B01J20/20C02F1/285C02F2101/20
Inventor 陈令浩
Owner QINGDAO CHENDA BIOLOGICAL SCI & TECH