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

A composite flocculant and laterite technology, used in flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high cost, slow effect, small area of ​​water area, etc., and achieve fast settlement speed, quick effect, convenient transportation and storage. Effect

Active Publication Date: 2011-06-29
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 is located in the Huguangyan area of ​​Zhanjiang City, West Guangdong Province. Take layered mining to take lateritic soil samples, according to literature (Xu Jinhong, Xu Ruisong, Xia Bin, Miao Li, Zhu Zhaoyu. "Content and distribution characteristics of rare earth elements in Guangdong red soil", China Soil and Fertilizer, 2007 (1): 18- 21), it can be seen that this laterite contains the following components in 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%; the laterite soil sample is air-dried or oven-dried, crushed, and passed through a 20-mesh sieve to obtain laterite powder;

[0032] (2) Add 100g of laterite powder, 12g of polyaluminum chloride and 10g of ferric trichloride into a ball mill, and continue grinding for 5 hours at a speed of 450r / min under normal temperature ...

Embodiment 2

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

[0045] a) Add 200mg of laterite powder, 60mg of polyaluminum chloride and 50mg of ferric chloride into 1L of water sample, stir on a magnetic stirrer for 3min, and then let it settle. After 1h, the supernatant of the water sample was taken to measure the turbidity. Compared with the turbidity of the original water sample, the turbidity removal rate of 1h was 80.55%, and the turbidity removal rate of 4h was 88.59%. After extracting chlorophyll with a chlorophyll suction filter pump, extract with 9:1 acetone solution for 24 hours, meas...

Embodiment 3

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

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

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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 the algae-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 safety of 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-controlling laterite composite flocculant and its preparation method and application. Background technique [0002] In recent years, large-scale outbreaks of algae blooms in rivers, lakes and seas in my country have seriously damaged the balance and stability of aquatic ecosystems, not only affecting the natural landscape, but also the toxins released by algal cells have constituted a threat to the human living environment, so algae outbreaks has become a disaster. The occurrence, development and control of algae blooms have aroused widespread concern from all walks of life. In water, algae cells are negatively charged, and it is difficult for the cells to coagulate and settle naturally. Therefore, to effectively control algal blooms, we can change the distribution of algae in the water, neutralize the surface charge of algae cells, so that they can gather and settle, so as to achieve th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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