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Algae-controlling laterite compound flocculant as well as preparation method and applications thereof

A composite flocculant and laterite technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of small water area, high cost, slow effect, etc. Effect

Active Publication Date: 2010-02-10
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional algae removal technologies, such as air flotation, biological treatment and other algae removal methods, have been rarely used due to high cost, small water area, and slow effect.

Method used

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  • Algae-controlling laterite compound flocculant as well as preparation method and applications thereof
  • Algae-controlling laterite compound flocculant as well as preparation method and applications thereof
  • Algae-controlling laterite compound flocculant as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) The soil sample collection site was located in Huguangyan area, Zhanjiang City, Guangdong Province. Taking layered mining to take lateritic soil samples, according to the literature (Xu Jinhong, Xu Ruisong, Xia Bin, Miao Li, Zhu Zhaoyu. "The content and distribution characteristics of rare earth elements in red soil in Guangdong", China Soil and Fertilizer, 2007(1): 18- 21), it can be known that this laterite contains the laterite of the following components by percentage: SiO 2 36.27~72.91%, Al 2 O 3 9.19~28.37%, Fe 2 O 3 4.4~15.66%, FeO 0.04~0.09%, MnO 0.03~0.22%, CaO 0.06~1.0%, MgO 0.07~0.36%, K 2 O 0.47~0.62%, Na 2 O 0.09~1.4%, P 2 O 5 0.04-0.17%; laterite soil samples are dried by natural air drying or oven drying, pulverized, and passed through a 20-mesh sieve to obtain laterite powder;

[0032] (2) 100g of laterite powder, 12g of polyaluminum chloride and 10g of ferric chloride were added to the ball mill, and under normal temperature and pressure...

Embodiment 2

[0044] The source of the water sample was the same as that of Example 1, and the turbidity in the water sample was measured to be 15.07 NTU, and the content of chlorophyll a was 153.34 μg / L. Take a certain amount of laterite powder obtained in step (1) of Example 1 and add it to a 1L water sample, then add 60 mg of polyaluminum chloride and 50 mg of ferric chloride respectively, and after stirring and settling, measure turbidity and chlorophyll a. removal rate.

[0045] a) Add 200 mg of laterite powder, 60 mg of polyaluminum chloride and 50 mg of ferric chloride to a 1 L water sample, stir on a magnetic stirrer for 3 minutes, and then let it settle. After 1 hour, the supernatant of the water sample was extracted to measure the turbidity. Compared with the turbidity of the original water sample, the removal rate of turbidity in 1 hour was 80.55%, and that in 4 hours was 88.59%. After 4 hours, 100 mL of the supernatant of the water sample was extracted, After the chlorophyll wa...

Embodiment 3

[0053] The source of the water sample is the same as that of Example 1. The measured turbidity in the water sample was 16.51 NTU, and the chlorophyll a content was 161.62 μg / L. The laterite composite flocculant prepared in Example 1 was added to a 1L water sample, and after stirring and settling, the turbidity and the removal rate of chlorophyll a were measured.

[0054] a) Add 120 mg of laterite composite flocculant (containing 98.36 mg of soil sample, 11.80 mg of polyaluminum chloride, and 9.84 mg of ferric chloride) to 1 L of water sample, stir on a magnetic stirrer for 3 minutes, and let it settle. After 1 hour, the supernatant of the water sample was extracted to measure the turbidity. Compared with the turbidity of the original water sample, the turbidity removal rate of 1 hour was 74.09%, and the turbidity removal rate of 4 hours was 84.55%; After the chlorophyll was extracted with a chlorophyll suction filter pump, it was extracted with a 9:1 acetone solution for 24 h...

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Abstract

The invention discloses an algae-controlling laterite compound flocculant as well as a preparation method and applications thereof. The method comprises the following steps: mixing 64.52-86.42% of laterite, 7.41-19.35% of polyaluminium chloride and 6.17-16.13% of ferric trichloride, and then milling to obtain the algae-controlling laterite compound flocculant. Compared with the methods by independently adding ferric trichloride or polyaluminium chloride, the algae-controlling laterite compound flocculant can obtain higher turbidity and higher chlorophyll a clearance rate, i.e. favorable effects for clearing algae and purifying water. Furthermore, with similar turbidity and chlorophyll a clearance rate, the quantities of the polyaluminium chloride and the ferric trichloride contained in thealgae-controlling laterite compound flocculant are lower than those of the polyaluminium chloride and the ferric trichloride which are independently used so as to save the cost and enhance the safetyof the flocculant in utilization. The algae-controlling laterite compound flocculant has the advantages of simple preparation procedure, moderate cost and favorable effects for clearing algae and purifying water, and is especially suitable for water bloom emergency treatment.

Description

technical field [0001] The invention relates to a flocculant, in particular to an algae-controlled red earth composite flocculant and a preparation method and application thereof. Background technique [0002] In recent years, the outbreak of large-scale algal blooms in the rivers, lakes and seas in my country has seriously damaged the balance and stability of the aquatic ecosystem, not only affecting the natural landscape, but also the toxins released by algal cells have posed a threat to the human living environment. Therefore, the outbreak of algae has become a disaster. The occurrence, development and control of algal blooms have attracted widespread attention from all walks of life. In water, algal cells are negatively charged, and it is difficult for the cells to naturally cohere and settle. Therefore, to effectively manage algal blooms, we can change the distribution of algae in water, neutralize the surface charge of algae cells, so that they can aggregate and settl...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 张渊明何维韩博平雷腊梅肖强华
Owner JINAN UNIVERSITY
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