ef8b02354_si_001.xls (30.5 kB)
Comprehensive Utilization for Neogene Lignite of the Zhaotong Basin, South China, and Its Environment Impacts
dataset
posted on 2018-09-05, 00:00 authored by Jie Long, Shixi Zhang, Kunli LuoNeogene lignite is
widely used for enterprise’s electric
power generation, local residents’ warming and cooking, and
crops’ fertilizer in South China nowadays. But there is still
no report about the element variations in Neogene lignite from the
Zhaotong Basin, South China. Understanding the elemental concentration
in lignite is of great importance to comprehensive utilization and
to evaluation of environmental impacts of the Neogene lignite. We
studied the variation patterns of 34 elements in lignite samples collected
from the Neogene Zhaotong Formation at Zhaotong Basin, Yunnan Province,
China. The arithmetic average of Cr, V, Ga, As, Cu, Rb, Co, Mo, and
Cd in studied lignite samples is higher than those of China coals,
while the content of Li and Bi are lower. Contents of As, Rb, La,
Ni, Cd, Mo, Co, Ga, and V in northeastern Yunnan lignite are higher
than the corresponding elements in common American Texas lignite,
while contents of Li and Bi are lower. Elements are classified into
four groups (Si–K–Zn–Rb–Ba–Pb,
Co–Cd–Na–Al, Ni–Ti–Bi–Cr–Cu–In–Mn–Mg-Ga–Fe–Tl,
and V–U–Cs–Sc–La–Sr–L–Se–Ca–As–Mo-S)
based on their correlation coefficient with ash yield. Elements, including
Al, K, Na, Si, Ti, Ba, Bi, Cd, Cr, Cu, Cs, Co, Ga, Ni, Sc, Zn, and
Pb, decrease from bottom to top of the Neogene Zhaotong Formation,
whereas Ca, Mg, As, Se, Mo, Fe, and S increase. In addtion, in M2
and M3 coal-bearing beds, Ga has potential applications after recycling
and Se could be reutilized as a kind of Se-containing fertilizer,
and their reserves estimations are approximately 98 × 104 (Ga) tons and 7.8 × 104 tons (Se). Cr and
Cd in Neogene lignite have potential risk for local natural environments
and the health of human beings.