초록 ▼

• 희소금속 또는 중금속 고선택성 나노다공성 실리카 흡착제 기술 개발
- Ni²⁺이온 (인공해수 내 선택성 99 %, 흡착 용량 30 mg/g), Co²⁺이온 (제거 효율: 98 %, 흡착용량: 100 mg/L), Li⁺이온 (인공해수 내 선택성 94 %, 폐수 내 선택성 90 %), Cr³⁺이온 (인공해수 내 선택성 99 %, 재사용성은 5회 반복 재사용 시 80 % 성능 유지함), In³⁺이온 (폐수 내 선택성 100 %),

• 희소금속 또는 중금속 고선택성 나노다공성 실리카 흡착제 기술 개발
- Ni²⁺이온 (인공해수 내 선택성 99 %, 흡착 용량 30 mg/g), Co²⁺이온 (제거 효율: 98 %, 흡착용량: 100 mg/L), Li⁺이온 (인공해수 내 선택성 94 %, 폐수 내 선택성 90 %), Cr³⁺이온 (인공해수 내 선택성 99 %, 재사용성은 5회 반복 재사용 시 80 % 성능 유지함), In³⁺이온 (폐수 내 선택성 100 %), Fe³⁺이온 (담수 내 선택성 100 %, 최대 흡착 용량: 약 30 mg/g, 재사용성은 5회 반복 재사용 시 87 % 성능 유지함)
• ITO 폐수로부터 인듐 고선택성 니켈포스페이트 흡착제 기술 개발
- 흡착률 99.9%, 흡착량 80mg/g
- 순도 90% 수준의 농축액 또는 인듐염 분말 형태로 회수 가능
• 개질된 초고도가교 나노그리드 하이드로겔 흡착소재 기술 개발
- 친환경 회수 공정인 FT-CDI를 이용하여 80% 이상의 탈착율 확보
• 흡착제로부터 희속금속 탈착을 위한 친환경적이고 전기적 방법인 유동연속 탈이온화 시스템 {Flow Through Contineous Deionization(FT-CDI) system}설계 및 실증 규모 기술개발
- 희소금속 탈착회수 최적 운전조건 도출함. (탈착율 80 %이상)

(출처 : 보고서 요약서 3P)

Abstract ▼

Ⅳ. Important research results
In this work (second phase of total research period), we synthesized nanogrid materials with high selectivity for specific metals such as nickel, cobalt, lithium, chromium, etc.-very important materials in the field of second battery, alloy steel, semiconductor, muni

Ⅳ. Important research results
In this work (second phase of total research period), we synthesized nanogrid materials with high selectivity for specific metals such as nickel, cobalt, lithium, chromium, etc.-very important materials in the field of second battery, alloy steel, semiconductor, munition industry, etc. and optimized of various conditions for excellent recycle ability of absorbent. We also developed new green recovery technique using electrical desorption.

< Absorbent aspect >
1. We developed a novel technology to synthesize nanogrid materials with high selectivity to adsorb target rare metal ions.
• Synthesis of nanogrid materials (seven kinds) with high selectivity for the specific rare metal ions (Ni²⁺, Li⁺, Co²⁺, In³⁺, Cr³⁺, Cu²⁺, Fe³⁺) in artificial seawater and artificial waste water.
• Synthesis of nanogrid materials with high selectivity, high adsorption capacity of the specific rare metal ions, and high recyclability.
- Selectivity for specifc metal ions: Ni²⁺ (99 %), Li²⁺ (94 %), In³⁺ (100 %), Co²⁺ (94 %), Cr³⁺ (84 %), Cu²⁺ (83 %), Fe³⁺ (100 %)
- Adsorption capacity: Ni²⁺ (43 mg/g), Li²⁺ (12 mg/g), In³⁺ (207 mg/g), Co²⁺ (109.6 mg/g), Cr²⁺ (24 mg/g), Cu²⁺ (221.25 mg/g), Fe³⁺(30 mg/g)
- Adsorption capacity when recycling (five times): Co²⁺ (80 %), Cr³⁺ (80 %), Fe³⁺ (87%)

2. We carried out recycling test of nanogrid materials with high selectivity for specific rare metal ions and test of deionization behavior of nanogrid materials in flow-through continuous deionization (FT-CDI) system.
• Equilibrium time on the adsorption of rare metal ions: mostly within 12 hours, within 30 min for Fe³⁺
• Adsorption capacity when recycling (five times): Co²⁺ (80 %), Cr³⁺ (80 %), Fe³⁺ (87 %)
• We obtained the deionization efficiency of 80 % for Co²⁺ using FT-CDI.

3. We synthesized nanoporous nickel phosphate with high selectivity for In³⁺ ions in waste water.
• Design of nanoporous and nanogrid materials with high selectivity for In³⁺ ions
• Synthesis of absorbents with low cost and high selectivity for In³⁺ ions in waste water.
• Adsorption % and adsorption amount of In³⁺ ions in ITO waste water: 99.9 % and 80 mg/g, respectively
• We synthesized nanoporous nickel phosphate with low cost and high selectivity for In³⁺ ions (recovery of indium with the concentrated solution or salt powder types)

4. We synthesized highly cross-linked nanogrid hydrogels with high adsorptivity for specific metal ions.
• Synthesis of highly cross-linked nanogrid hydrogels with functional groups
• Synthesis of nanogrid hydrogels with particle shapes of dendrimer type
• Improvement of conversion yield and metal ion adsorbability of highly cross-linked nanogrid hydrogels by polymer nanocomposites with allyamine as backbone
• Synthesis of absorbents with bead type for application in FT-CDI system
• Desorption % of metal ion in FT-CDI system was 80 %.

< System aspect >
1. Synthesis and performance test of spherical materials for indium and lithium selective adsorption by polymerization method.
• Optimized massive synthesis technology of spherical materials for indium and lithium selective adsorption.
Deducted the optimum condition for recovery system through application of FT CDI and its fundamental material properties and adsorbability

2. B-CDI module fabrication and structure􍾶 performance test. Design of BEDI module.
• To recover lithium from sea water and lithium secondary batteries waste water, fabrication of lithium selective electrode and BEDI module. also, structure and performance test of B-CDI membrane and the optimum condition for lithium recovery was determined through application of FT-CDI using BEDI module in the 2nd stage.

3. Establishment of design condition of chemical free green recovery system (FT-CDI) and manufacture of prototypes.
• To obtain fundamental technique of chemical free recovery of organic-metal by electrical description method, FT-CDI system was designed, which allows desorption by circulation in electric field with constant flow rate of organic-metal adsorbed materials at unit cell by electro-deionization membrane method.

4. Deduction of optimum operating condition through FT-CDI application test of common using materials and synthesized materials.
• Secure the optimum recovery condition of organic-metal of FT-CDI system, and to obtain commercializing equipment design techniques, the optimum operating condition was determined by desorption test using voltage, flow rate, and electrolyte concentration of commercialize materials and synthesized materials as parameters. Based on this experiment, fundamental techniques for FT-CDI equipment was established.

(출처 : SUMMARY 9P)

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 보고서 요약서 ... 3
• 요 약 문 ... 4
• SUMMARY ... 9
• CONTENTS ... 14
• 목차 ... 15
• 제 1 장 연구개발과제의 개요 ... 16
• 제 1절 연구개발의 목적 ... 16
• 제 2절 연구개발의 중요성 및 필요성 ... 16
• 1. 경제적·산업적 중요성 ... 16
• 2. 연구개발의 필요성 ... 25
• 제 2 장 국내외 기술개발 현황 ... 29
• 제 1절 연구개발 대상 기술의 국내·외 현황 ... 29
• 1. 세계 수준 ... 29
• 2. 국내 수준 ... 30
• 3. 국내외 연구현황 ... 32
• 제 3 장 연구개발수행 내용 및 결과 ... 34
• 제 1절 인공해수와 인공폐수로부터 다공성 나노그리드 소재를 이용한 희소금속 고선택적 흡착소재개발 ... 34
• 제 2절 ITO 폐수로부터 니켈포스페이트 나노세공체를 이용한 인듐 고선택적 흡착소재 개발 ... 109
• 제 3절 초고도가교 희소금속 흡착성소재 연구 개발 ... 136
• 제 4절 희소금속 선택성 하이브리드 소재 합성 및 FT-CDI 설계, 제작 ... 172
• 제 4 장 목표달성도 및 관련분야에의 기여도 ... 240
• 제 5 장 연구개발결과의 활용계획 ... 248
• 제 6 장 연구개발과정에서 수집한 해외과학기술정보 ... 250
• 제 7 장 참고문헌 ... 252
• 끝페이지 ... 265