A simple method for preparing chelated calcium based on the black liquor generated by the pulp and paper industry. Issue 1 (1st January 2019)

• Record Type: Journal Article
• Authors: Yang, Guiting; Cheng, Donghong; Liu, Yan; Dongdong, Cheng; Zhang, Min; Zhao, Hongmeng; Sun, Yao; Huang, Songjun; Sao, Junfei; Xu, Ting; Huang, Xiancheng
• Is Part Of: Environmental pollutants & bioavailability. Volume 31:Issue 1(2019)
• Page Start: 56
• Page End: 59
• Publication Date: 2019-01-01
• Subjects: Chelated calcium -- black liquor -- paper industry -- waste liquid -- quick-making method; Pollution -- Periodicals; Bioavailability -- Periodicals; Environmental chemistry -- Periodicals; Pollution; Environmental chemistry; Bioavailability; Periodicals; Electronic journals; 577.27
• DOI: 10.1080/26395940.2018.1563501
• Languages: English
• ISSNs: 2639-5932

Abstract

ABSTRACT: A simple method for preparing chelated calcium from black liquor produced in the paper industry was studied. Various factors influencing the chelation rate of Ca 2+ were studied, including the system pH, reaction temperature, reaction time, reaction solution ratio. The optimum reaction conditions are as follows: the system pH, reaction temperature, reaction solution ratio (V(CaCl2 ):m (Black liquor)) and time were 5.6, 25°C, 1:20 and 60 min, respectively. The maximum Ca 2+ chelation rate was 88.75%. The characteristics of chelated calcium fertilizer in black liquor were studied by Fourier transform infrared, scanning electron microscope . The results indicated that the CaCl2 could be chelated by the black liquor from paper-making industry, and showed a high chelating rate.