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Total concentrations and different fractions of heavy metals in sewage sludge from Guangzhou, China
Abstract Dewatered municipal sludge samples were collected from five municipal wastewater treatment plants (WWTPs) and one industrial WWTP in Guangzhou, China. A number of agricultural parameters andExpand
Using vacuum pyrolysis and mechanical processing for recycling waste printed circuit boards.
The aim of this study was to present a recycling process without negative impact to the environment as an alternative for recycling WPCB and demonstrated the feasibility of vacuum pyrolysis and mechanical processing for recyclingWPCB. Expand
Dewaterability of five sewage sludges in Guangzhou conditioned with Fenton's reagent/lime and pilot-scale experiments using ultrahigh pressure filtration system.
The results indicated that the specific resistance to filterability (SRF) of sludge was reduced efficiently by approximately 90%, when conditioned with Fenton's reagent and lime, and the economic assessment shows that Fenton’s re agent and lime combined with ultrahigh pressure filtration system can be an economical and viable technology for sewage sludge dewatering. Expand
A rapid Fenton treatment technique for sewage sludge dewatering
Abstract The study aimed to develop a rapid and practical Fenton treatment technique for sludge dewatering. The results indicated that the Fenton reaction time could be shortened to 5 min underExpand
Bioleaching combined brine leaching of heavy metals from lead-zinc mine tailings: Transformations during the leaching process.
The study showed thatBioleaching significantly changed the speciation of heavy metals and the formation and surface morphology of tailings and the metals were mainly bound in stable fractions after bioleaching. Expand
Synergistic effects of surfactant-assisted ionic liquid pretreatment rice straw.
Surfaceactant-assisted IL pretreatment is an effective method for producing fermentable sugars from lignocellulosic substrates and cellulose crystallinity and surface morphology of the rice straw were substantially altered after surfactants. Expand
Impact of surfactant type for ionic liquid pretreatment on enhancing delignification of rice straw.
This work describes an environmentally friendly method for pretreating rice straw by using 1-Allyl-3-methylimidazolium chloride as an ionic liquid (IL) assisted by surfactants and provided an effective and environmental method for Pretreating lignocellulosic substrates by using green solvent (ionic liquid) and biodegradable bio-surfactant. Expand
Concentrations of Heavy Metals in Six Municipal Sludges from Guangzhou and Their Potential Ecological Risk Assessment for Agricultural Land Use
Six kinds of municipal sludge samples were collected from wastewater treatment plants (WWTPs) from Guangzhou in southern China. Total concentration of Cu, Pb, Zn, Cr, Ni, Cd, and Mn in the sludge wasExpand
Oxidation of potassium n-butyl xanthate with ozone: Products and pathways
The mineral flotation wastewater containing residual potassium n-butyl xanthate (PBX) must be treated because of its biotoxicity, stench, and difficulty to be degraded. Treatment with ozone is anExpand
Oxidation of aniline aerofloat in flotation wastewater by sodium hypochlorite solution
The results showed that NaOCl concentration had a significant influence on aniline aerofloat oxidation and at 100 mg/L anilines and dithiophosphate was removed under the following optimal conditions: NaOcl concentration’s’= 1.25 g/L, pH =‬4, and reaction time  60 min. Expand