To explore the effects of modified pomace on copper migration via the soil on the banks of the rivers in northern Sichuan and Chongqing, fruit pomace (P) and ethylene diamine tetra-acetic acid (EDTA) modified P (EP) were evenly added (1% mass ratio) to the soil samples of Guanyuan, Nanbu, Jialing, and Hechuan from the Jialing River; Mianyang and Suining from the Fu River; and Guangan and Dazhou from the Qu River. The geochemical characteristics and migration rules of copper in different amended soils were simulated by column experiment. Results showed that the permeation time of copper in each soil column was categorized as EP-amended > P-amended > original soil, and the permeation time of amended soil samples at different locations was Jialing > Suining > Mianyang > Guangan > Dazhou > Nanbu > Guanyuan > Hechuan. Meanwhile, the average flow rate of copper in each soil column showed a reverse trend with the permeation time. Copper in exchangeable, carbonate, and iron–manganese oxide forms decreased with the increase of vertical depth in the soil column, among which the most evident decreases appeared in the carbonate-bonding form. The copper accumulation in different locations presented a trend of Jialing > Suining > Mianyang > Guangan > Dazhou > Nanbu > Guangyuan > Hechuan, and the copper content under the same soil showed EP-amended > P-amended > original soil. The copper proportion of the carbonate form was the highest in each soil sample, followed by the exchangeable form. The proportions of iron-manganese oxide and organic matter forms were relatively small. A significant correlation was observed between the cation exchange capacity and the copper content in exchangeable and carbonate forms. Moreover, total organic carbon and copper contents were negatively correlated.

中文翻译：

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改性果渣对西南地区河岸土壤铜迁移的影响

为探究改性果渣对川渝北部河流沿岸土壤铜迁移的影响，均匀添加果渣（P）和乙二胺四乙酸（EDTA）改性P（EP）（1 %质量比）与来自嘉陵江的关元、南部、嘉陵和合川的土壤样品；涪河边的绵阳、遂宁；以及曲河上的广安和达州。通过柱试验模拟了不同改良土壤中铜的地球化学特征和迁移规律。结果表明，铜在各土柱中的渗透时间为EP-修正>P-修正>原土，不同位置修正后土样的渗透时间为嘉陵>遂宁>绵阳>广安>达州>南部>关园>合川。同时，各土柱中铜的平均流速随渗透时间呈反向趋势。可交换、碳酸盐和铁锰氧化物形式的铜随着土柱垂直深度的增加而减少，其中以碳酸盐结合形式的减少最为明显。不同地点铜积累呈现嘉陵>遂宁>绵阳>广安>达州>南部>广元>合川的趋势，同一土壤下铜含量表现为EP-修正>P-修正>原土。每个土壤样品中碳酸盐形式的铜比例最高，其次是交换形式。铁锰氧化物和有机物形式的比例相对较小。在可交换和碳酸盐形式的阳离子交换容量和铜含量之间观察到显着的相关性。此外，总有机碳和铜含量呈负相关。