Arif Muhammad Saleem, Riaz Muhammad, Shahzad Sher Muhammad, Yasmeen Tahira, Buttler Alexandre, Garcıa-Gil Juan Carlos, Roohi Mahnaz, Rasool Akhtar
Department of Environmental Sciences & Engineering, Government College University Faisalabad, Faisalabad, 38000, Pakistan.
Department of Soil and Environmental Sciences, University College of Agriculture, University of Sargodha, Sargodha, Pakistan.
Environ Monit Assess. 2016 Feb;188(2):102. doi: 10.1007/s10661-016-5112-y. Epub 2016 Jan 19.
Water shortage and soil qualitative degradation are significant environmental problems in arid and semi-arid regions of the world. The increasing demand for water in agriculture and industry has resulted in the emergence of wastewater use as an alternative in these areas. Textile wastewater is produced in surplus amounts which poses threat to the environment as well as associated flora and fauna. A 60-day incubation study was performed to assess the effects of untreated textile wastewater at 0, 25, 50, 75, and 100% dilution levels on the physico-chemical and some microbial and enzymatic properties of an aridisol soil. The addition of textile wastewater provoked a significant change in soil pH and electrical conductivity and soil dehydrogenase and urease activities compared to the distilled-water treated control soil. Moreover, compared to the control treatment, soil phosphomonoesterase activity was significantly increased from 25 to 75% application rates, but decreased at 100% textile wastewater application rate. Total and available soil N contents increased significantly in response to application of textile wastewater. Despite significant increases in the soil total P contents after the addition of textile wastewater, soil available P content decreased with increasing concentration of wastewater. Changes in soil nutrient contents and related enzymatic activities suggested a dynamic match between substrate availability and soil N and P contents. Aridisols have high fixation and low P availability, application of textile wastewater to such soils should be considered only after careful assessment.
水资源短缺和土壤质量退化是世界干旱和半干旱地区的重大环境问题。农业和工业对水的需求不断增加，导致这些地区出现了将废水作为替代水源的情况。纺织废水产量过剩，对环境以及相关动植物构成威胁。进行了一项为期60天的培养研究，以评估未经处理的纺织废水在0%、25%、50%、75%和100%稀释水平下对干旱土的物理化学性质以及一些微生物和酶活性的影响。与蒸馏水处理的对照土壤相比，添加纺织废水导致土壤pH值、电导率、土壤脱氢酶和脲酶活性发生显著变化。此外，与对照处理相比，土壤磷酸单酯酶活性在25%至75%的施用量下显著增加，但在100%纺织废水施用量下降低。施用纺织废水后，土壤全氮和有效氮含量显著增加。尽管添加纺织废水后土壤全磷含量显著增加，但土壤有效磷含量随废水浓度增加而降低。土壤养分含量和相关酶活性的变化表明底物有效性与土壤氮磷含量之间存在动态匹配。干旱土具有高固定性和低磷有效性，在将纺织废水施用于此类土壤之前应进行仔细评估。
