000			02735nab a22003617a 4500
001			64659
003			MX-TxCIM
005			20211203230346.0
008			200115s2020 xxk|||p|op||| 00| 0 eng d
022			_a0273-1223
022			_a1996-9732 (Online)
024	8		_ahttps://doi.org/10.2166/wst.2020.242
040			_aMX-TxCIM
041			_aeng
100	0		_925648 _aHuifen Zhang
245	1		_aAnalysis of chemical characteristics of lignite upgrading wastewater and its agricultural utilization
260			_aUnited Kingdom : _bIWA Publishing, _c2020.
500			_aPeer review
520			_aThe lignite upgrading wastewater (LUW) produced in the drying and upgrading process of lignite cannot be discharged directly. Conventional wastewater treatment methods are usually costly and unable to achieve efficient utilization of water resources which are rich in activity components. In this study, the water quality analysis showed that LUW belonged to seriously polluted waters with low pH and very high total nitrogen content. Fifty-five compounds, mainly phenols and organic acids, were identified by gas chromatography-mass spectrometry (GC-MS) analysis. The study confirmed that the LUW, after being diluted to an appropriate concentration, could significantly promote the growth of wheat seedlings. The phenols and organic acids were the activity material basis of LUW, which promoted seed germination possibly through playing a role similar to plant hormones and simultaneously enhancing the utilization of nutrient elements. LUW had the natural advantages of directly developing high-end liquid fertilizers in terms of its physical form, chemical composition, biological activity, safety and economy. This study confirmed the feasibility of applying LUW to agricultural field as liquid fertilizer only through simple dilution without other treatments. Applying LUW as liquid fertilizer can not only supply a fertilizer product with low production cost and outstanding efficacy, but also provide an efficient and green way for the treatment of upgrading wastewater, which utilize the LUW as natural resources instead of purifying and discharging.
546			_aText in English
650		7	_2AGROVOC _91038 _aChemical composition
650		7	_2AGROVOC _925653 _aLignite
650		7	_2AGROVOC _911840 _aGas chromatography
650		7	_2AGROVOC _911789 _aMass spectrometry
650		7	_2AGROVOC _912503 _aWastewater
700	0		_925649 _aJi Song
700	0		_925650 _aMi Zhang
700	0		_93515 _aCheng Xiang
700	0		_925651 _aBaocai Li
700	0		_925652 _aYi Qin
773	0		_dUnited Kingdom : IWA Publishing, 2020. _gv. 81, no. 7, p. 1530–1540 _tWater Science and Technology _x0273-1223
942			_2ddc _cJA _n0
999			_c64659 _d64651