Arsenic-containing water body treatment method

A treatment method and water body technology, applied in the field of red mud resource utilization, can solve the problems of low utilization rate of red mud resources, secondary pollution, low utilization rate of acid waste water resources, etc., to reduce manpower, reduce residues, and optimize treatment and resource utilization

Pending Publication Date: 2021-12-31
SOUTH CHINA AGRI UNIV
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Problems solved by technology

[0005] The present invention intends to provide a method for treating arsenic-containing water to solve the problems of low resource utilization rate of existing red mud and easy secondary pollution, and low resource utilization rate of acidic wastewater

Method used

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  • Arsenic-containing water body treatment method
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  • Arsenic-containing water body treatment method

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Embodiment 1

[0032] (1) Preparation of modified red mud

[0033] Using acid mine wastewater to modify red mud, the goal is to prepare three kinds of modified red mud with pH of 3, 4, and 5 respectively. The process is as follows:

[0034] Dry and grind two kinds of red mud produced from African bauxite and Australian bauxite, and pass through a 2mm sieve;

[0035] Prepare 8 large 2L beakers, 10g of Australian ore red mud is weighed into each of 4 beakers, and 10g of non-mineral red mud is weighed into each of the remaining 4 beakers;

[0036] Fully shake the collected mine wastewater, filter it with filter paper, and gradually add it to the above-mentioned beaker, shake it while adding it, and measure the pH of the mixed solution at the same time until it reaches the target value;

[0037] After allowing the mixture to sit overnight, measure its pH accurately again. If the measured value is higher than the target value, it is necessary to add waste water again to reduce it until the targ...

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Abstract

The invention discloses an arsenic-containing water body treatment method. The method comprises the following steps: S1, drying red mud, and crushing, grinding and sieving the dried red mud to obtain red mud powder; S2, putting the red mud powder into a container, gradually adding acidic wastewater to prepare a mixed solution, stopping pouring after the pH value of the mixed solution reaches a target value, and standing; S3, measuring the pH value of the mixed solution after standing again, and if the measured value is higher than the target value, continuing to add the acidic wastewater until the pH value of the mixed solution reaches the target value; S4, carrying out solid-liquid separation on the mixed solution, and drying the separated solid-phase product to obtain modified red mud; and S5, treating the arsenic-containing water body by using the modified red mud. Two pollutants which are difficult to treat, namely the acid wastewater and the red mud, are treated together, arsenic in the water body can be efficiently removed, and the resource utilization rate is high.

Description

technical field [0001] The invention relates to the technical field of red mud resource utilization, in particular to a method for treating arsenic-containing water. Background technique [0002] Red mud is a highly alkaline waste produced in the production process of alumina industry. It has complex components and is difficult to comprehensively utilize. The pH of red mud is between 9-13, which is strongly alkaline. The output of red mud is huge, and on average, 1.5-2.5 tons of red mud will be produced for every 1 ton of alumina produced. As of 2020, China's alumina production capacity will reach 89.15 million tons per year, and the operating capacity will be 73 million tons per year, resulting in nearly 100 million tons of solid waste red mud. It will cause great harm to the soil and water environment, and its stockpiling also takes up a lot of land resources. At present, the treatment is mainly to recycle the useful metals, add acid to reduce its pH, and then landfill....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F101/10
CPCC02F1/58C02F2101/103
Inventor 秦俊豪邓暮娟王希黎华寿
Owner SOUTH CHINA AGRI UNIV
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