Cassava dreg composite heavy metal curing agent and preparation method thereof

A technology for cassava residue and heavy metals, which is applied in chemical instruments and methods, sludge treatment through temperature control, special treatment goals, etc. effect, high social and economic benefits, low price effect

Inactive Publication Date: 2015-07-15
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy metals are easy to accumulate in organisms, and the pollution range is wide and the duration is long, which seriously affects the quality of life and health of human beings. However, the treatment of heavy metal pollution in sediment is difficult

Method used

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Examples

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Embodiment Construction

[0017] Non-limiting examples of the present invention are as follows:

[0018] A kind of cassava residue composite heavy metal solidifying agent is prepared from the component raw materials of following weight (kg):

[0019] Cassava residue 25, phosphogypsum 25, fly ash 12, attapulgite 8, glutinous rice flour 4, chitosan 0.4, gelatin 6, borax 0.8, calcium lignosulfonate 1.5.

[0020] The preparation method of cassava residue composite heavy metal solidifying agent comprises the following steps:

[0021] (1) Weigh raw materials by weight, mix cassava slag, phosphogypsum, fly ash and attapulgite, add water at a solid-to-liquid weight ratio of 1:1, stir at 80°C for 2 hours, filter and dry the filter cake, Then treated at 500°C for 2 hours, crushed and passed through a 200-mesh sieve to obtain component A;

[0022] (2) Add chitosan into 2% acetic acid solution at a solid-to-liquid weight ratio of 1:60, heat to 80°C and stir until completely dissolved, then add glutinous rice flo...

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PUM

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Abstract

The invention discloses a cassava dreg composite heavy metal curing agent, which is composed of the following raw materials in parts by weight: 20 to 30 parts of cassava dreg, 20 to 30 parts of phosphogypsum, 10 to 15 parts of fly ash, 5 to 10 parts of attapulgite, 3 to 5 parts of glutinous rice flour, 0.3 to 0.5 part of chitosan, 4 to 8 parts of gelatin, 0.5 to 1 part of borax, and 1 to 2 parts of calcium lignin sulfonate. The provided curing agent is mainly composed of industrial and agricultural wastes, has a good curing effect on a plurality of heavy metals, is capable of reducing the leaching concentration of heavy metals to prevent separation-out, and has the advantages of low price, energy saving, waste utilization, simple manufacturing technology, and high social and economical benefits.

Description

technical field [0001] The invention relates to the field of environmental treatment, in particular to a cassava residue composite heavy metal curing agent and a preparation method thereof. Background technique [0002] With the development of industry and economy, environmental pollution is becoming more and more serious. Industrial wastewater and domestic sewage enter rivers, lakes and other water bodies through various channels, resulting in heavy metal pollution in sediment. Heavy metals are non-degradable and relatively stable, accumulate in sediment, interact with water bodies, and re-release into water bodies. Heavy metals are easy to accumulate in organisms, and the pollution range is wide and the duration is long, which seriously affects the quality of life and health of human beings. However, the treatment of heavy metal pollution in sediment is difficult. [0003] The solidification / stabilization treatment of heavy metals is to immobilize the heavy metals by mixi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
CPCC02F11/00C02F11/20C02F2303/06
Inventor 唐玉朝黄显怀李雪婷
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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