This research focused on the application of the hydrothermal sulphidisation method to separate lead from scrap cathode ray tube funnel glass. Prior to hydrothermal treatment, the cathode ray tube funnel glass was pretreated by mechanical activation. Under hydrothermal conditions, hydroxyl ions (OH–) were generated through an ion exchange reaction between metal ions in mechanically activated funnel glass and water, to accelerate sulphur disproportionation; no additional alkaline compound was needed. Lead contained in funnel glass was converted to lead sulphide with high efficiency. Temperature had a significant effect on the sulphidisation rate of lead in funnel glass, which increased from 25% to 90% as the temperature increased from 100 °C to 300 °C. A sulphidisation rate of 100% was achieved at a duration of 8 h at 300 °C. This process of mechanical activation and hydrothermal sulphidisation is efficient and promising for the treatment of leaded glass.
AndreolaFBarbieriLCorradiALancellottiI (2005) Cathode ray tube glass recycling: an example of clean technology. Waste Management & Research23: 314–321.
2.
BabbittCWKahhatRWilliamsE. (2009) Evolution of product lifespan and implications for environmental assessment and management: A case study of personal computers in higher education. Environmental Science & Technology43: 5106–5112.
3.
ChenMJZhangFSZhuJX (2009) Lead recovery and the feasibility of foam glass production from funnel glass of dismantled cathode ray tube through pyrovacuum process. Journal of Hazardous Materials161: 1109–1113.
4.
China Household Electric Appliances Research Institute (2014) White paper on WEEE recycling industry in China. Beijing, China.
5.
DengTChenJY (1990) Application of phase transfer catalysis to treating refractory oxidized copper ores. International Journal of Mineral Processing28: 221–230.
6.
GregoryJRNadeauMCKirchainRE (2009) Evaluating the economic viability of a material recovery system: The case of cathode ray tube glass. Environmental Science & Technology43: 9245–9251.
7.
HeartS (2008) Recycling of cathode ray tubes (CRTs) in electronic waste. Clean36: 19–24.
8.
JangYCTownsendTG (2003) Leaching of lead from computer printed wire boards and cathode ray tubes by municipal solid waste landfill leachates. Environmental Science & Technology37: 4778–4784.
9.
KucharDFukutaTOnyangoMS. (2007) Sulfidation treatment of molten incineration fly ashes with Na2S for zinc, lead and copper resource recovery. Chemosphere67: 1518–1525.
10.
LeeCHHsiCS (2002) Recycling of scrap cathode ray tubes. Environmental Science & Technology36: 69–75.
11.
LeeCHChangCTFanKS. (2004) An overview of recycling and treatment of scrap computers. Journal of Hazardous Materials B114: 93–100.
12.
LeclerMTZimmermannFSilventeE. (2015) Exposure to hazardous substances in cathode ray tube (CRT) recycling sites in France. Waste Management39: 226–235.
LiangYJChaiLYMinXB. (2012) Hydrothermal sulfidation and floatation treatment of heavy-metal-containing sludge for recovery and stabilization. Journal of Hazardous Materials217–218: 307–314.
15.
LuXWShihKLiuS. (2013) Extraction of metallic lead from cathode ray tube (CRT) funnel glass by thermal reduction with metallic iron. Environmental Science & Technology47: 9972–9978.
16.
MenadN (1999) Cathode ray tube recycling. Resources Conservation and Recycling26: 143–154.
17.
MéarFOYotPGKolobovAV. (2007) Local structure around lead, barium and strontium in waste cathode ray tube glasses. Journal of Non-Crystalline Solids353: 4640–4646.
18.
MiyoshiHChenDPAkaiT (2004a) A novel process utilizing subcritical water to remove lead from wasted lead silicate glass. Chemistry Letters33: 956–957.
19.
MiyoshiHChenDPAkaiT (2004b) A novel process utilizing subcritical water to recycle soda-lime-silicate glass. Journal of Non-Crystalline Solids337: 280–282.
20.
MussonSEJangYCTownsendTG. (2000) Characterization of lead leachability from cathode ray tubes using the toxicity characteristic leaching procedure. Environmental Science & Technology34: 4376–4381.
21.
NnoromICOsibanjoOOgwuegbuMOC (2011) Global disposal strategies for waste cathode ray tubes. Resources Conservation and Recycling55: 275–290.
22.
PoonCS (2008) Management of CRT glass from discarded computer monitors and TV sets. Waste Management28: 1499.
23.
PantD (2013) E waste projection using life span and population statistics. The International Journal of Life Cycle Assessment18: 1465–1469.
24.
SasaiRKuboHKamiyaM. (2008)Development of an eco-friendly material recycling process for spent lead glass using a mechanochemical process and Na2EDTA reagent. Environmental Science & Technology42: 4159–4164.
25.
SaterlayAJWilkinsSComptonRG (2001) Towards greener disposal of waste cathode ray tubes via ultrasonically enhanced lead leaching. Green Chemistry3: 149–155.
26.
SchumacherKASchumacherTAgbemabieseL (2014) Quantification and probabilistic modeling of CRT obsolescence for the State of Delaware. Waste Management34: 2321–2326.
27.
SpalvinsEDubeyBTownsendTG (2008) Impact of electronic waste disposal on lead concentrations in landfill leachate. Environmental Science & Technology42: 7452–7458.
28.
YuanWYLiJHZhangQW. (2012) Innovated application of mechanical activation to separate lead from scrap cathode ray tube funnel glass. Environmental Science & Technology46: 4109–4114.
29.
YuanWYLiJHZhangQW. (2013) Lead recovery from cathode ray tube funnel glass with mechanical activation. Journal of the Air & Waste Management Association63: 2–10.
30.
YotPGMéarFO (2009) Influence of AlN, TiN and SiC reduction on the structural environment of lead in waste cathode-ray tubes glass: An X-ray absorption spectroscopy study. Journal of Physics: Condensed Matter21: 285104.
31.
ZhangCLWangJWBaiJF. (2013) Recovering lead from cathode ray tube funnel glass by mechano-chemical extraction in alkaline solution. Waste Management & Research31: 759–763.
