Recyclable Sorption Material Obtained by Immobilizing Waste Dye in Barite

来源 :第五届全国环境化学大会会议 | 被引量 : 0次 | 上传用户:songjinyi2001
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Highly concentrated dye wastewater is often drained into environmental water during production and use,most of which is harmful to human health. Recently,we sought a new way to immobilize major component of dye wastewater in barite by co-precipitatio-n method,leading to cost-effective sorbents applicable to organic wastewater treat-ment. For instance,a barite-based sorbent was successfully yielded by immobilizati-on of weak acidic pink red B(APRB) from the dye wastewater. The experimental resul-ts showed that the sorbent has a very high adsorption capacity in removal of some c-ationic dyes,such as ethyl violet(EV),cationic brilliant red 5GN(CBR),methylen-e blue(MB) and Basic pink red B(BPR),and four kinds of POPs(Fig. 1),which attri-buted to high negative charge and lipophilic structure features of APRB.The adsorpt-ion of cationic dyes corresponded to the Langmuir isotherm modeland involved chargeattraction,and that of POPS corresponded to the octanol-waterpartition law and involved hydrophobic stacking. In addition,the hybrid sorbent wasregenerated from slud-ge over five cycles by acidification with adsorption capacityappreciably changed. T-his work has developed a simple,eco-friendly and practicalapproach for preparation of wastewater sorption material. Further studies are currentlyunder way.
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