Bio-adsorbent preparation based on Chinese Radix isatidis residue for Pb(II) removal

Abstract A series of bio-adsorbents with potential for Pb(II) removal from wastewater were prepared by treating Radix isatidis residue (RIR) with integrated chemical treatment and fermentation methods. Batch experiments were used to test the adsorption and desorption performance of different bio-adsorbents. The results showed that treated RIRs had significantly enhanced adsorption capacity of 23.5 and 27.6 mg g−1 for Pb(II) within 50 minutes, in contrast to the raw RIR's 12.2 mg g−1. RIR produced by modified chemical/fermentation treatment can remove up to 31.1 mg g−1. After five adsorption/desorption cycles, about 75% of the adsorption capacities were maintained. This study is a novel approach to reusing the enormous quantity of Chinese herbal medicine residues.

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Chinese Herbal Medicine for the Optimal Management of Polycystic Ovary Syndrome

The American Journal of Chinese Medicine ◽

10.1142/s0192415x17500252 ◽

2017 ◽

Vol 45 (03) ◽

pp. 405-422 ◽

Cited By ~ 20

Author(s):

Madeleine Ong ◽

Jie Peng ◽

Xingliang Jin ◽

Xianqin Qu

Keyword(s):

Herbal Medicine ◽

Polycystic Ovary Syndrome ◽

Chinese Herbal Medicine ◽

Polycystic Ovary ◽

Herbal Medicines ◽

Ovary Syndrome ◽

Metabolic Complications ◽

Beneficial Effects ◽

Chinese Herbal ◽

Novel Approach

Polycystic ovary syndrome (PCOS) is a complex heterogeneous disorder characterized by androgen excess and ovulatory dysfunction; it is now known to be closely linked to metabolic syndrome. Recent research suggests that insulin resistance plays an important role in the pathogenesis of PCOS which may lead to the excessive production of androgens by ovarian theca cells. Currently there is no single drug that can treat both the reproductive and metabolic complications of the disorder. Existing pharmaceutical agents such as hormonal therapies have been associated with side effects and are not appropriate for PCOS women with infertility. Additionally, insulin sensitizing agents useful for treating the metabolic abnormalities in PCOS have limited efficacy for treating reproductive aspects of the disorder. Chinese herbal medicines have a long history of treating gynaecological problems and infertility and therefore may be a novel approach to the treatment of PCOS. Current research demonstrates that the compounds isolated from herbs have shown beneficial effects for PCOS and when combined in an herbal formula can target both reproductive and metabolic defects simultaneously. Therefore, further investigation into Chinese herbal medicine in the treatment of PCOS is warranted.

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Enhanced Adsorption Capacities of Fungicides Using Peanut Shell Biochar via Successive Chemical Modification with KMnO4 and KOH

Separations ◽

10.3390/separations8040052 ◽

2021 ◽

Vol 8 (4) ◽

pp. 52

Author(s):

Yong-Gu Lee ◽

Jaegwan Shin ◽

Jinwoo Kwak ◽

Sangwon Kim ◽

Changgil Son ◽

...

Keyword(s):

Chemical Modification ◽

Peanut Shell ◽

Batch Experiments ◽

X Ray ◽

Adsorption Mechanisms ◽

Treatment Processes ◽

Adsorption Capacities ◽

Isotherms And Thermodynamics ◽

Effects Of Temperature ◽

Enhanced Adsorption

This study explored the effects of peanut shell biochar (PSB) on the adsorption capacities of fungicides with and without successive chemical modifications, using KMnO4 and KOH (PSBOX-A), in order to provide a valuable understanding of their adsorption mechanisms and behaviors. To this end, the physicochemical properties of PSB and PSBOX-A were examined by using the Brunauer–Emmett–Teller method, Fourier transform infrared spectroscopy, and scanning electron microscopy with an energy dispersive X-ray spectrometer. The effects of temperature, ionic strength, and humic acids on the adsorption of fungicides, using PSB and PSBOX-A, were estimated through batch experiments. Furthermore, adsorption kinetics, isotherms, and thermodynamics were studied. The maximum adsorption capacities of fungicides by PSBOX-A were estimated to be more notable (Qmax of carbendazim = 531.2 μmol g−1, Qmax of pyrimethanil = 467.7 μmol g−1, and Qmax of tebuconazole = 495.1 μmol g−1) than PSB (Qmax of carbendazim = 92.6 μmol g−1, Qmax of pyrimethanil = 61.7 μmol g−1, and Qmax of tebuconazole = 66.7 μmol g−1). These findings suggest that successive chemical modification using KMnO4 and KOH could potentially be used to effectively fabricate PSB to remove fungicides in water-treatment processes.

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