Recovery of high-value metals from geothermal sites by biosorption and bioaccumulation

YC Lo, CL Cheng, YL Han, BY Chen, JS Chang - Bioresource technology, 2014 - Elsevier
Generation of geothermal energy is associated with a significant amount of geothermal
fluids, which may be abundant in high-value metals, such as lithium, cesium, rubidium, and …

Pyrite enhanced chlorination roasting and its efficacy in gold and silver recovery from gold tailing

H Qin, X Guo, Q Tian, L Zhang - Separation and Purification Technology, 2020 - Elsevier
Developing cost-effective, efficient and environmentally friendly recovery process for gold
tailings is imperative for environmental protection and resource recycling. In this paper, we …

Amidoxime functionalization of a poly (acrylonitrile)/silica composite for the sorption of Ga (III)–Application to the treatment of Bayer liquor

S Lu, L Chen, MF Hamza, C He, X Wang, Y Wei… - Chemical engineering …, 2019 - Elsevier
The copolymerization of styrene with divinylbenzene (DVB) in the presence of silica particles
produces a commercial silica-supported polymer (SiO 2-P) that was chemically reacted with …

Hydrometallurgical recovery of precious metals and removal of hazardous metals using persimmon tannin and persimmon wastes

K Inoue, M Gurung, Y Xiong, H Kawakita, K Ohto… - Metals, 2015 - mdpi.com
Novel and environmentally benign adsorbents were prepared via a simple sulfuric acid
treatment process using the wastes of astringent persimmon, a type of biomass waste, along …

Persimmon tannin-based new sorption material for resource recycling and recovery of precious metals

M Gurung, BB Adhikari, S Alam, H Kawakita… - Chemical Engineering …, 2013 - Elsevier
A low cost and environmentally “green” adsorption material was developed by anchoring
tetraethylenepentamine (TEPA) groups on persimmon tannin and its potentiality for …

Selective recovery of gold using some cross-linked polysaccharide gels

B Pangeni, H Paudyal, M Abe, K Inoue, H Kawakita… - Green …, 2012 - pubs.rsc.org
Effective recovery of gold from aqueous acidic chloride media was achieved with different
kinds of polysaccharides with different structures by treating with concentrated sulfuric acid …

Sulfonated modified rice straw for selective adsorption and extraction of gold ions from highly acidic solutions

Q Zhu, K Huang - Colloids and Surfaces A: Physicochemical and …, 2024 - Elsevier
In this study, a novel and cost-effective adsorbent, sulfonated modified rice straw (SRS), was
developed for the selective adsorption and extraction of gold ions from acidic solutions. The …

Removal and recovery of Au (III) from aqueous solution using a low-cost lignin-based biosorbent

ZW He, LH He, J Yang, QF Lü - Industrial & Engineering …, 2013 - ACS Publications
A lignin-based composite, PANI–EHL, was prepared in a facile manner from enzymatic
hydrolysis lignin (EHL) and aniline. The effects of initial pH value, biosorbent concentration …

Accelerating gold extraction from refractory gold tailings via NH4HF2 pre-treatment

Y Lin, X Hu, F Zi, S Chen, Y Chen, P Yang… - Journal of Molecular …, 2023 - Elsevier
Gold tailings are secondary resources, however, a suitable method to extract the remaining
gold has not yet been found. Thus, this study investigated that a gold tailings was pretreated …

Au (III) recovery using two microalgal adsorbents with or without treatment with concentrated sulfuric acid

J Adhikari, R Sakamura, H Kawakita, S Morisada… - Journal of Water …, 2023 - Elsevier
Herein, we introduce efficient, cost-effective, and eco-friendly microalgae-based adsorbents.
Two microalgae with different compositions and sizes were employed as adsorbents with …