Layered Nano Lanthanum Composite for Phosphorus Locking and Algae Settling
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Solution Overview
Problem
Current methods for treating eutrophic lakes face complex operations, increased ecological risks, and higher human and material resource consumption, with existing phosphorus locking agents like Phoslock having low lanthanum loading capacity and weak flocculation ability, and they fail to overcome the shortcomings of Phoslock, and the combination of coagulation. The existing phosphorus locking agents like Phoslock, and the combination of coagulation. The existing phosphorus removal agents are inefficient in handling large amounts of suspended solids and suspended solids, and the combination of coagulants and phosphorus locking agents increases costs and ecological risks.
Innovation Solution
A layered dimetal-based nano lanthanum material is synthesized by preparing a mixed solution of double metal salts and a precipitant solution, followed by a coprecipitation reaction, pH adjustment, and lanthanum loading, resulting in a material with adjustable lanthanum loading capacity and enhanced flocculation and phosphorus adsorption capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional phosphorus locking agents like Phoslock are used, then phosphorus removal capacity is achieved, but lanthanum loading capacity is low and flocculation ability is weak
Solution Approach 1:
The patent combines phosphorus locking function and flocculation function into a single composite material. The layered double hydroxide carrier provides flocculation capability through its metal hydroxide properties, while lanthanum loaded on the carrier provides phosphorus locking. This merging eliminates the need for separate coagulant and phosphorus locking agent additions.
Solution Approach 2:
The invention creates a composite material consisting of a layered double hydroxide carrier (such as Mg-Al-LDH) with loaded lanthanum. This composite structure integrates the flocculation properties of metal hydroxides with the high phosphorus affinity of lanthanum, achieving both functions simultaneously in one material.
2Productivity
If coagulants and phosphorus locking agents are combined for treatment, then phosphorus removal and suspended solids removal are achieved, but costs increase and ecological risks increase
Solution Approach 1:
The composite material performs multiple functions simultaneously: flocculation of suspended solids and algae, phosphorus locking, and turbidity reduction. This multi-functionality replaces the need for multiple separate chemical additions, reducing both operational complexity and ecological risks associated with multiple chemicals.
Solution Approach 2:
The patent merges the functions of coagulants (for suspended solids removal) and phosphorus locking agents into a single material system. The layered double hydroxide provides coagulation/flocculation while loaded lanthanum provides phosphorus binding, eliminating the need for sequential additions of different chemicals.
3Quantity of substance
If existing phosphorus locking agents are used, then phosphorus adsorption is achieved, but the agents fail to handle large amounts of suspended solids effectively
Solution Approach 1:
The composite material integrates phosphorus adsorption capability (from loaded lanthanum) with suspended solids handling capability (from layered double hydroxide flocculation). This allows the material to simultaneously address both phosphorus removal and suspended solids removal in eutrophic water bodies.
Solution Approach 2:
The invention combines phosphorus locking function and suspended solids flocculation function into one integrated material. The layered double hydroxide carrier structure provides flocculation for suspended solids while the loaded lanthanum provides phosphorus adsorption, enabling simultaneous handling of both contaminants.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The material achieves efficient flocculation and phosphorus locking with a single addition, reducing turbidity and settling algae, while maintaining a high lanthanum loading capacity and avoiding the need for multiple additions, thus being more convenient and efficient than traditional methods.
Implementation Method 1
Lanthanum is a rare earth element with low toxicity and abundant reserves, and has received continuous attention in the field of phosphorus removal due to its strong affinity with phosphates
Implementation Method 2
mix a 0.1 M LaCl3 solution with high-purity bentonite at a liquid-solid ratio of 100:1 and stir for 24 h for ion exchange reaction
Implementation Method 3
the treatment of eutrophication in Lake De Kuil (The Netherlands) involves adding ferric chloride on the first day to settle algae and other suspended solids in water
Implementation Method 4
adding coagulants such as polyaluminum chloride or polyferric chloride are added to remove suspended algae and other particles on the lake surface
Data Source
AI summary
The present invention discloses a synthesis method for a layered dimetal-based nano lanthanum material capable of synchronously locking phosphorus, removing algae, and reducing turbidity, and the use thereof, and belongs to the field of environmental functional materials. In the present invention, a synthesis method includes: synthesizing LDHs by means of a single-drop coprecipitation method; filtering out an obtained product, washing the product with distilled water and drying; then adding the product to an alcohol solution of a lanthanum salt at certain concentration, and stirring for reaction; precipitating lanthanum ions in situ by adjusting a pH value of the solution; filtering out the reaction precipitate, washing the precipitate with an alcohol, and drying the precipitate to obtain an LDH-based nano lanthanum material.