Novel modified wood ear mushroom sticks biochar aerogel spheres for efficient capture of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e585" altimg="si78.svg"> <mml:msup> <mml:mrow> <mml:mi mathvariant="normal">Cd</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>2</mml:mn> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> </mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e597" altimg="si79.svg"> <mml:msup> <mml:mrow> <mml:mi mathvariant="normal">Pb</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>2</mml:mn> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> </mml:math> mix-ions from water
Yining Ji, Na Zheng, Bo Wu, Qirui An, Zimeng Li, Siyu Sun, Wenhui Zhang, Xiaoqian Li, Sujing Wang
Abstract
A novel adsorbent was synthesized for the capture of heavy metals mixture in water by encapsulating hydroxyapatite-modified wood ear mushroom sticks biochar in calcium alginate beads (CA-HAPMB). The surface structure and adsorption mechanism of the CA-HAPMB were characterized by Scanning electron microscopy and X-ray energy dispersion spectroscopy (SEM-EDS), Fourier transform infrared spectrometer (FTIR), X-ray diffraction patterns (XRD), and X-ray photoelectron spectroscopy (XPS). Under different conditions, CA-HAPMB for Cd2+ and Pb2+ were investigated for their adsorption properties in water and their competition. The adsorption capacities of Cd2+ and Pb2+ on the aerogel spheres reached 302.2 mg g−1 (2.69 mmol g−1) and 564.5 mg g−1 (2.73 mmol g−1), respectively (based on Langmuir). The aerogel spheres are easier to collect than biochar materials. The results show that CA-HAPMB composite aerogel spheres have a good application prospect in capturing heavy metal ions from water.