Author
Qin Cao
Bio: Qin Cao is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Anaerobic digestion & Denitrification. The author has an hindex of 11, co-authored 23 publications receiving 1941 citations.
Papers
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TL;DR: It is highlighted that both adults and children consuming food crops grown in wastewater-irrigated soils ingest significant amount of the metals studied, however, health risk index values of less than 1 indicate a relative absence of health risks associated with the ingestion of contaminated vegetables.
1,951 citations
TL;DR: The primary causes of instability are a high sugar and negligible ammonia content, in addition to the feed without effluent recirculation, which led to BA loss.
75 citations
TL;DR: In this paper, the performance of phosphoric acid (H3PO4) in the preparation of activated carbon-containing phosphorus species (P-species) using rice husk residues as feedstock was studied.
Abstract: The performance of phosphoric acid (H3PO4) in the preparation of activated carbon-containing phosphorus species (P-species) using rice husk residues as feedstock was studied. In the activation process, the consequent pretreatments by NaOH and HCl, respectively, remove the silica and ash thoroughly, which led to cracks and pore opening. While H3PO4 acting as activation regent interacted with the phenolic and carbonyl groups of activated carbon, forming P-containing carbonaceous species (such as C–O–P), which further promoted the development of micropore of the activated carbon and then increased the surface area, H3PO4 also acted as catalyst to adjust and control the texture properties and structures of activated carbon. The activated carbon (PC-2.5) prepared at 500 °C for 2 h using H3PO4-treated carbon residue with acid/carbon mass ratio of 2.5 (g/g) achieved the maximum surface area of 1365 m2/g. Interestingly, the P-species formed in the activated carbon exhibited high-efficiency catalytic effects for the treatment of municipal waste landfill leachate to a disposable quality, where the removal rate of pollutant from landfill leachate over 90% and a high removal of TN (84%), COD (82%) and NH4+–N (100%) were obtained.
60 citations
TL;DR: Compared with single parameters, the CH4/CO2 and BA/total alkalinity (TA) ratios are recommended as early warning indicators for engineering applications of thermophilic AD of VW.
48 citations
TL;DR: The aim of this work was to study the acetate separation from fresh vinegar residue FVR to avoid inhibition of methanogenesis and hydrothermal treatment on washed vinegar residue (WVR) to enhance methane production.
41 citations
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TL;DR: The principles, advantages and disadvantages of immobilization, soil washing and phytoremediation techniques which are frequently listed among the best demonstrated available technologies for cleaning up heavy metal contaminated sites are presented.
Abstract: Scattered literature is harnessed to critically review the possible sources, chemistry, potential biohazards and best available remedial strategies for a number of heavy metals (lead, chromium, arsenic, zinc, cadmium, copper, mercury and nickel) commonly found in contaminated soils. The principles, advantages and disadvantages of immobilization, soil washing and phytoremediation techniques which are frequently listed among the best demonstrated available technologies for cleaning up heavy metal contaminated sites are presented. Remediation of heavy metal contaminated soils is necessary to reduce the associated risks, make the land resource available for agricultural production, enhance food security and scale down land tenure problems arising from changes in the land use pattern.
2,826 citations
TL;DR: The present review mainly focuses on NMOs' preparation, their physicochemical properties, adsorption characteristics and mechanism, as well as their application in heavy metal removal.
1,828 citations
TL;DR: Estimated daily intake (EDI) and THQs for Cd and Pb of rice and vegetables exceeded the FAO/WHO permissible limit and bio-accumulation factors of heavy metals were significantly higher for leafy than for non-leafy vegetable.
1,022 citations
TL;DR: This review focuses on and describes heavy metal contamination in soil-food crop subsystems with respect to human health risks, and explores the possible geographical pathways of heavy metals in such subsystems.
952 citations
TL;DR: A comprehensive map of both soil and water pollution threats to food safety in China is presented and integrated policies addressing soil andWater pollution for achieving food safety are suggested to provide a holistic approach.
779 citations