Removal of methyl orange from water by Fenton oxidation of magnetic coconut-clothed biochar

Abstract

Water pollution has become a serious environmental problem to date. Advanced oxidation processes (AOP) have been widely applied in water treatments.

Adsorption of the non-steroidal anti-inflammatory drug (ibuprofen) onto biochar and magnetic biochar prepared from chrysanthemum waste of the beverage industry

“…Xu et al suggested that the Fe particles on the surface of biochar were overlapped and piled up with each other, resulting in the reduction of the pore volume and decreasing the specific surface area. 43 The decrease in pore diameter also supported the theory that Fe particles were present within the porous structure.…”

“…The spectrum shows broad band at 3000-3500 cm −1 in all samples due to the presence of O-H groups. 43 For chrysanthemum, bands at 2923 and 2855 cm −1 characteristic of aliphatic C-H stretching, which supported by the presence of band at 1372 cm −1 , assigned to aliphatic C-H folding. 44 The absorption bands at 1730 and 1242 cm −1 corresponding to the stretching of carbonyl C]O and the stretching deformation of C-O and phenolic O-H groups, respectively.…”

Modification of biochar by phosphoric acid via wet pyrolysis and using it for adsorption of methylene blue

“…Using phosphoric acid as a solvent, the wet pyrolysis was conducted under normal pressure, with simple operation, low energy consumption, and excellent performance for cation adsorption. This study compares the KOH modified biochar, 21 phosphoric acid modification of method is more convenient. Seaweed, coconut shell, and coconut coat were all considered as excellent agro-waste, which were abundantly disposed in Hainan province without any treatment.…”

Ecological Restoration of Engineering Slopes in China—A Review

“…Therefore, biochar has a good development prospect in ecological restoration of soil. The feedstocks and manufacturing processes of different biochar are summarized in Table 1 [31][32][33][34][35][36][37][38][39][40][41][42][43][44].…”

“…Shredded cotton stalk Slowly pyrolyzed at 450 • C under limited oxygen [31] Sugar maple and red maple Pyrolyzed at 500 • C under argon atmosphere for 30 min [33] Eucalyptus saligna leaves Pyrolyzed at 400 • C or 550 • C without steam activation [32] Paper sludge, corn stover, dried distillers grains with soluble, pinewood sawdust, cow manure, and wastewater biosolids Pyrolyzed from 600 • C to 800 • C by catalytic pyrolysis of a catalyst made at the same temperature [35] Prune residues from orchards Discontinuously pyrolyzed at 500 • C [34] Pinewood, peanut shell, and bamboo Produced by slow pyrolysis at temperatures from 300 • C to 500 • C or through hydrothermal conversion [36] Eucalyptus globulus or chopped Lantana camara stem Slowly pyrolyzed at 500 • C, and then grounded to 2 mm granules [37] Parthenium weed Pyrolyzed from 200 • C to 500 • C for 30 to 120 min [38] O. Ficus cladodes Pyrolyzed at 200 • C for 30 min, and then at 600 • C for an hour [39] The residual biomass of cultivated Gracilaria after agar extraction and Oedogonium Soaked in FeCl 3 solution for 24 h, then dried in an oven at 60 • C for 24 h, and finally slowly pyrolyzed at 300, 450, and 750 • C for 60 min [40] Eichornia crassipes Pyrolyzed with limited oxygen from 200 to 500 • C for 30 min to 2 h [41] Seaweed powder Soaked in KOH solution, then dried in an oven at 80 • C, and at last pyrolyzed at 700 • C for 270 min under the atmosphere of nitrogen [42] Tea waste Pyrolyzed at 300, 500, and 700 • C for 1 h under the condition of limited oxygen [43] 3.…”